a wide variety of communication needs. E.F. Johnson produces equipment for land mobile
radio and mobiletelep hone ser vices w hich include business, industr ial, governmen t, public safety, and personal users.
Viking Head/EF J ohnson logo, Summit
®
Guard
or product names used in this manual are trademarks and/or registered t rademarks of
their respective manufacturer.
Information in this manual is subject to change without notice.
are registered trademar ks of the E.F. Johnson Com pany. All oth er company and/
This service manual contains installation, operation, programming, align ment, and service in formation
for the E.F. Johnson Summit
®
DM 975x and 977x
transceivers.
NOTE: The 900 MHz (977x) Summit DM model is no
longer available.
1.2 EQUIPMENT DESCRIPTION
1.2.1 GENERAL
The 975x/977x are full featured, high performance transceivers that operate in the Multi-Net
®
LTR
, and conventional modes. The 975x is an 800
®
,
MHz transceiver which operates on the 760 trunked
channels from 806-824 MHz (mobile transmit). The
receive channels are 45 MHz above these frequencies
(851-869 MHz). The 977x is a 900 MHz transceiver
which operates on the 479 trunked channels from 896902 MHz (mobile transmit). The receive channels are
39 MHz above these frequencies (935-941 MHz).
Standard analog fr eque ncy modulation is utilized.
The last digit of the model number (97x3, 97x4,
97x5, and 97x6) denotes fr ont or re mote mountin g and
power output as shown in Table 1-2. This table also
lists other E.F. Johnson Multi-Net transceivers and the
distinguishing features of each.
Like all E.F. Johnson Multi-Net and LTR transceivers, the 975/97 7x is digit ally synt hesized and logic
controlled. In the Multi-Net or LTR modes, all the user
has to do to make a call is select the desired system
and group and press the push-to- talk switch. If a busy
or out-of-range condition is not indicated by special
tones, the path to the other party is complete and
speaking can begin. Channel selection, monitoring
before transmitting, and squelch control are all
performed by the logic.
1.2.2 PROGRAMMING
Transceiver programming is performed using a
dealer-supplied personal computer and the E.F.
Johnson RPI (Remote Programming Interface) and
programming software l is te d i n Table 1-1. Transceiver
operating parameters are stored in an EEPROM reprogrammable memory. Refer to Section 4 for more
programming information.
The operating code (firmware) for the microprocessor is stored in a flash-type memory device. This
allows the operating program to be updated using E.F.
Johnson Write-On
programming software and the
standard transceiver programming setup. This simplifies software updates be cause the microp rocessor or an
EPROM does not need to be changed. The latest
Write-On software and operating code can be downloaded from the E.F. Johnson ACES
SM
Bulletin Board
System. Refer to Section 4.6 for more information on
flash programming.
1.2.3 SELECTABLE SYSTEMS AND GROUPS
The maximum number of systems that can be
programmed is determined by the type of system and
the number of groups that are programmed. If only
single-group systems are programmed, up to 73 MultiNet, 66 LTR, or 100 conventional systems can be
programmed. Then as more groups are programmed,
the number of systems decreases. If the maxim um
number of groups are programmed (11 Multi-Net, 10
LTR/conventional), up to 32 Multi-Net, 30 LTR, or 32
conventional systems can be programmed. When data
is being entered using the programming software,
there is a running indication of the amount of
EEPROM memory left.
With conventional operation, each system selects
a channel, and the group switch select s the Call Guar d
(CTCSS or digital) signaling and other parameters on
that channel.
1.2.4 FRONT AND REMOTE MOUNTING
The 97x3/97x5 tran sceivers are des igned fo r front
mounting within reach of the operator, and the 97x4/
97x6 are designed for remote mounting in a location
such as the trunk (see Table 1-2). The remote control
unit cable connects to the remote interface pigtail
coming from the back of the transceiver (see
Figure 2-3). This pi gtail i s standa rd with remote mount
transceivers only.
1-1
Revised February 1997
Part No. 001-9750-005
GENERAL INFORMATION
The remote control unit uses the same front panel
assembly that is used on front mount transceivers.
Therefore, it operates the same as a front-mount transceiver. A Remote Conversion Kit is available which
converts the front pa nel of a front mount t ransce iver t o
a remote control unit (see Table 1-1). The remote
control unit has an internal 5-watt s peaker or an
external 15-watt speaker can be used. Dual transceiver controls are also available when the remote
control unit is connected to a standard front mount
transceiver.
1.2.5 NPSPAC MODELS (800 MHZ ONLY)
All 800 MHz versions of this tr ansceiver meet the
stricter specifications established by NPSPAC
(National Public Safety Panel Advisory Committee)
for public safety frequencies from 821-824 and 866869 MHz. Deviation is less on NPSPAC channels;
however , no alig nment chan ge i s requi red beca use it is
automatically set for the correct level when a public
safety channel is selected
(see Appendix A.2).
1.3 PART NUMBER BREAKDOWN
The following is a breakdown of the part number
used to identify this transceiver:
242 - 97 x x - 111
5 = 800 MHz
7 = 900 MHz
3 = 15W, Frt Mt
4 = 15W, Rem Mt
5 = 30/35W, Frt Mt
6 = 30/35W, Rem Mt
1.4 TRANSCEIVER IDENTIFICATION
1.5 ACCESSORIES
The accessories avail able for this transceiver are
listed in Table 1-2. A brief description of several of
these accessories follows.
Mounting Hardware - The mounting hardware and
DC power cable are shown in Figures 2-1 and 2-3 in
Section 2. A 22-foot DC power cable is used for both
front and remote mount applications. The cable is cut
to the required length at installation and any excess
discarded. The accesso ry cabl e is used to connect such
things as an external speaker, public address, ignition
sense input, and a horn alert to the transceiver. It
includes two 22-foot and three 2-foot wires that are
connected as required to external points. The adapter
cable is used to connect a 86xx-series power cable to
these transceivers.
Key Cap Kit - This kit includes key caps labeled for
all the functions that can be controlled by the six front
panel option switches. Also included are blank key
caps for unused switches. An extraction tool for
removing the key caps is included in the cable and
hardware kit. Refer to Section 2.6 for key cap installation information.
Lockable Mounting Tray - This bracket allows the
transceiver to be l ocked in plac e to guar d agains t th eft.
In addition, it allows it to be easily unlocked and
removed from the vehicle. Refer to Section 2.8 for
installation information.
Microphones and Speaker - The microphones in
Table 1-1 have an impedance of 620 ohms. All DTMF
microphones are backlighted. The environmentally
sealed microphones are sealed against such things as
rain, sand, and dust.
The transceiver identification number is printed
on a label that is affixed to the bottom cover. The
following information is contained in that number:
Revision
Model
97xx x A 24 3 A 12345
8th
Letter
Week No.
Manufacture
Date
Digit
Plant
Year
Warranty
Number
A =
The external 15-watt spe aker ca n be use d in pl ace
of the internal 5-watt speaker. It is non- amplified and
weatherproof. This speaker is connected to pins 1 and
2 of the accessory connector pigtail on the back of the
transceiver.
Remote Kits - The remote conversion kit converts the
front panel of a front-mount transceiver to a remote
control unit. It includes a blank cover plate with a
programming jack for the transceiver, a housing with
interface board to form the remote control unit, a
remote pigtail cable, and a 17-foot control cable. The
remote control unit uses the intern al 5-watt
Revised February 1997
1-2
Part No. 001-9750-005
speaker or
GENERAL INFORMATION
Table 1-1 ACCESSORIES
AccessoryPart No.
Mounting Accessories [1]
Mounting bracket & hardware kit023-9750-012
DC power cable & hardware, 22'023-9750-010
Accessory cable023-9750-011
Key cap kit, Summit587-9650-008
Lockable Mounting Tray585-7000-185
Adapter cable (to use 86xx-series
power cable with 97xx)
Microphones
Standard amplified dynamic250-0740-310
Standard, environ sealed587-9650-010
DTMF w/o memory589-0016-028
DTMF w/o mem, env seal WR805587-9650-015
DTMF w/20 no. mem, envir seal587-9650-012
Desk microphone250-0742-011
External speaker, 5" 15W 3.2 ohm
environmental sealed
Remote conversion kit250-9701-001
Remote control unit kit , Summit023-9701-002
2
UD
I universal interface cable
Factory installed023-9750-001
Field installed597-2002-245
023-9650-006
250-0151-006
Table 1-1 ACCESSORIES (Continued)
AccessoryPart No.
Programming Accessories
Remote prog interface (RPI)023-9800-000
Cable, RPI to transceiver 023-9750-005
Cable, xcvr-xcvr (cloning)597-2002-268
Cable, RPI to cmptr, 6’ DB9 M - DB9 F 597-5900-002
Cable, RPI to cmpt r, 6’ DB25 M - DB9F597-0005-057
PC Programming software, 3.5” disket t e023-9998-278
[1] Included with all transceivers
the 15W external speaker. The remote control unit kit
includes the Summit DM control unit, remote pigtail
cable, and 17-ft. control cable. A microphone is not
included. Dual transceiver controls are provided by
connecting this control unit to a standard front mount
transceiver.
2
UD
I Kit - This is the Unive rsal Digital and Data
Interface pigtail cable that installs in the transceiver to
provide connections to external data equipment. The
Validation Key is no longer required to use this interface. Refer to Section 4.7 for more information.
Compandor Kit - The compandor k it inc ludes a board
which installs in the option slots of the transceiver.
This board provides 2:1 compression of the transmit
audio and 1:2 expansion of the receive audio to minimize noise in the audio signal.
Compandor kit
Factory installed023-9750-002
Field installed250-9750-002
Encryption kit
Factory installed023-9750-003
Field installed250-9750-003
DC noise filter kit
Factory installed023-9750-004
Field installed542-5010-003
Control stat ion power supply
11 amp, 115 VAC, 60 Hz585-4001-201
15 amp, 115 VAC, 60 Hz585-4001-202
11 amp, 230 VAC, 50 Hz585-4001-203
15 amp, 230 VAC, 50 Hz585-4001-204
NOTE: Companding is not compatible with encryption, so those features cannot be used together.
Encryption Kit - The encryption kit includes an
encryption board which installs in the option slots of
the transceiver. Voice encryption provides security
from unauthorized monitoring of conversation by
casual eavesdropping and analog sca nner s. Re fe r to
Section 5.8.16 for more information on the encryption
feature.
DC Noise Filter Kit - The DC noise filt er kit includes
a filter choke that ins talls in the transcei ver in the main
13.8-volt supply line. This filter provides additional
attenuation of vehicle electrical system noise. Installation is described in Section 2.7.
Revised February 1997
1-3
Part No. 001-9750-005
Table 1-2 E.F. JOHNSON MULTI-NET TRANSCEIVERS
GENERAL INFORMATION
Transceiver
8160 Avenger SK800Portable1 & 3W14/11YesSmall size, Qk Sel Sw
8161 Aven ger SK800Portable1 & 2W14 /11YesSmall size, Qk Sel Sw, Intrin Safe
8162 Avenger SK900Portable1 & 2W14/11YesSmall size, Qk Sel Sw
8163 Aven ger SK900Portable1 & 2W14 /11YesSmall size, Qk Sel Sw, Intrin Safe
8605*800Frt Mount15W16/11YesLow Power
8606*800Frt Mount15W16/11YesLow Power, NPSPAC
8615*800Frt Mount35W16/11YesHigh Power
8616*800Frt Mount35W16/11YesHigh Power, NPSPAC
8620*800Rem Mount 35W16/11YesHigh Power, Remote Mount
8621*800Rem Mount 35W16/11YesHigh Pwr, Rem Mt, NPSPAC
8622*800Rem Mount 12W16/11Talk-Arnd N/AFull Duplex
8655*900Frt Mount30W16/11YesHigh Power
Freq
(MHz)
Type
Power
Output
System/
Groups
[1]
M-Net/LTR/
Conv
Operation; Conv
Talk-Around
Special Features
9753 Summit DM800Frt Mount15W32/11YesHi Spec/Full Feature, Low Pwr
9754 Summit DM800Rem Mount 15W32/11YesHi Spec/Full Feature, Low Pwr
9755 Summit DM800Frt Mount35W32/11YesHi Spec/Full Feature, Hi Pwr
9756 Summit DM800Rem Mount 35W32/11YesHi Spec/Full Feature, Hi Pwr
9773 Summit DM*900Frt Mount15W32/11YesHi Spec/Full Feature, Low Pwr
9774 Summit DM*900Rem Mount 15W32/11YesHi Spec/Full Feature, Low Pwr
9775 Summit DM*900Frt Mount30W32/11YesHi Spec/Full Feature, Hi Pwr
9776 Summit DM*900Rem Mount 30W32/11YesHi Spec/Full Feature, Hi Pwr
9883800Frt Mount15 or 30W 40/16YesFull Featured, dual BW, high tier
9896900Frt Mount15 or 30W 40/16YesFull Featured, high tier
[1] All except 98xx have up to 11 groups per Multi-Net system and up to 10 groups per LTR or conv system (the 98xx can
have up to 16 group s with any type of system). The 97xx and 9 8xx t ran scei ver max i mum nu mber of systems is variable. The
minimum number is shown and the maximum numb er depends on the type and number of groups in each (see Section 1.2.3).
* Disconti nued Models
1-4
Revised February 1997
Part No. 001-9750-005
GENERAL INFORMATION
Control Station Power Supply - The 11-ampere
versions are used with the 15-watt transceivers only,
and the 15-ampere models can be used with all
models. The transceiver slides into the power supply
housing and receives power from banana jacks on the
back of the power supply. The standard power cable is
used for connectin g power , and the inter nal trans ceiver
speaker provides speaker audio.
Programming Hardware and Software - The RPI
provides the interface between the programming
computer and transceiver. This RPI is used for
programming both radio personality information and
the Write-On™ flash memory (see Section 1.2.2).
The cables from the RPI to the computer and
transceiver are not included with the RPI and must be
ordered separately. The transceiver programming software is available for IBM PC or compatible computers
only. The operating parameters are programmed using
the software listed in Table 1-1, and the Writ e-On flash
memory is programmed using different software available on the ACES
SM
system (see Section 4.6). The
cloning cable allows one transceiver to program
another with identical information. Refer to Section 4
for more programming informat ion.
1.6 PRODUCT WARRANTY
When your call is answered at the E.F. Johnson
Company, you will hear a brief message informing
you of numbers that can be entered to reach various
departments. This number may be entered during or
after the message using a tone-type telephone. If you
have a pulse-type telephone, wait until the message is
finished and an operator will come on the line to assist
you. When you enter some numbers, another number
is requested to further categorize the type of information you need. You may also ente r the 4-digit extension number of the person that you want to reach if
you know what it is.
If you are calling from outside the continental
United States, the Customer Service telephone
numbers are as follows:
Customer Service Department - (507) 835-6911
Customer Service FAX Machine - (507) 835-6969
NOTE: Emergency 24-hour technical support is also
available at the 1-800 and preceding numbers during
off hours, holidays, and weekends.
You may also contact the Customer Service
Department by mail. Please include all information
that may be helpful in solving your problem. The
mailing address is as follows:
The warranty statement for this transceiver is
available from your product supplier or from the
Warranty Department, E.F. Johnson Company, 299
Johnson Avenue, P.O. Box 1249, Waseca, MN 56093-
0514. This informat ion may al so be re quested f rom the
Warranty Department by phone as described in the
next section. The Warranty Department may also be
contacted for Warranty Service Reports, claim forms,
or any other questions concerning warranties or
warranty service.
1.7 FACTORY CUSTOMER SERVICE
The Customer Service Depart ment of the E.F.
Johnson Company provides customer assistance on
technical problems and the availability of local and
factory repair facilities. Customer Service hours are
7:30 a.m. - 4:30 p.m. Central Time, Monday - Friday.
From within the continental United States, the
Customer Service Department can be reached at the
following to ll-free number: 1-800-328-3911
E.F. Johnson Company
Customer Service Department
299 Johnson Avenue
P.O. Box 1249
Waseca, MN 56093-0514
1.8 FACTORY RETURNS
Repair service is normal ly availab le through local
authorized E.F. Johnson Land Mobile Radio Service
Centers. If local se rvice is not avail able, the equipment
can be returned to the fac tor y fo r re pai r. However, it is
recommended that you contact the Field Service
Department before returning equipment. A service
representative may be able to suggest a solution to the
problem so that return of the equipment would not be
necessary.
Be sure to fill out a Factory Repai r Req uest For m
#271 for each unit to be repaired, whether it is in or
out of warranty. These forms are available free of
1-5
Revised February 1997
Part No. 001-9750-005
GENERAL INFORMATION
charge by calling the repair lab (see Section 1.7) or by
requesting them when you send a unit in for repair.
Clearly describe the diffic ulty experien ced in the space
provided and also note any prior physical damage to
the equipment. Then include a form in the shipping
container with each unit. Your phone number and
contact name are very important because there are
times when the techni cians have specific questions
that need to b e answered in order to completely identify and repair a problem.
When returning equipment for repair, it is also a
good idea to use a PO number or some other reference
number on your pap erwo rk in case you need to c all the
repair lab about your unit. These numbers are referenced on the repair order and it makes it easier and
faster to locate your unit in the lab.
Return Authorization (RA) numbers are not
necessary unles s y ou have been given one by the Field
Service Department. They require RA numbers for
exchange units or i f they want to be aware of a sp ecific
problem. If you have been given an RA number, reference this number on the Factory Repair Request Form
sent with the unit. The repair lab will then contact the
Field Service Department when the unit arrives.
1.9 REPLACEMENT PARTS
E.F. Johnson replacement parts can be ordered
directly from the Service Parts Department. To order
parts by phone, dial the toll-free number as described
in Section 1.7. When ordering, please supply the part
number and quantity of each part ordered. E.F.
Johnson dealers also need to give their account
number.
If there is uncertainty about the part number,
include the designator (C112, for example) and the
model number of the equipment the part is from.
You may also send your order by mail or FAX.
The mailing address i s as follows and the FAX number
is shown in Section 1.7.
E.F. Johnson Company
Service Parts Department
299 Johnson Avenue
P.O. Box 1249
Waseca, MN 56093-0514
1-6
Revised February 1997
Part No. 001-9750-005
GENERAL INFORMATION
SUMMIT® DM 975x (800 MHz) SPECIFICATIONS
The following are general specifications intended for use in testing and servicing this transceiver. For current
advertised specifications, refer to the specification sheet available from the Marketing Department. Specifications
are subject to change without notice.
GENERAL
Operating ModesMulti-Net, LTR, and Conventional
Frequency RangeTransmit - 806-824 MHz Std, 851-869 MHz conv talk-around
Receive - 851-869 MHz
SystemsVariable from 31-100 depending on type and number of groups
GroupsUp to 11 per system Multi-Net; up to 10 per system LTR and conv
Mounting Location9753/9755 - Dash, convertible to remote mount
9754/9756 - Remote
Transmit/Receive Separation45 MHz standard, 0 MHz conventional talk-around
Channel Spacing25 kHz standard, 12.5 kHz offset
Channel Increment12.5 kHz
Frequency Stability1.5 PPM (–30
Dimensions and Weight2.1" (5.3 cm) H, 7.2" (18.2 cm) W, 8.3" (21.1 cm) L, 5.0 lb (2.3 kg)
Power Requirement13.6 volts, negative ground
ComplianceFCC Parts 15 and 90
° to +60° C/–22° to +140° F)
RECEIVER
Sensitivity (12 dB SINAD)0.30 microvolt
Selectivit y–75 dB
Intermodulation–75 dB
Spurious and Image Rejection–75 dB (–70 dB half IF)
Maximum Channel Spread18 MHz
Audio Response6 dB per octave de-emphasis per TIA 603 specification
Audio Power Output/Distortion12 watts with external 4-ohm speaker, distortion less than 3%
RF Input Impedance50 ohms
Current Drain (maximum)1.0 ampere (standby), 3.0 ampere (rated audio output)
9755/9756 - 35 watts (30 watts talk-around)
Power Output Range 1-2 watts or 3 dB below rated (PC programmable)
Spurious and Harmonic Emissions–78 dB (35W), –75 dB (15W)
FM Hum and Noise (TIA)–48 dB
Audio Modulation16K0F1D, 16K0F3E, 16K0F3D, 14K0F1D, 14K0F3E, 14K0F3D
Audio DistortionLess than 3% at 1 kHz
Audio Frequency Response6 dB per octave pre-emphasis per TIA 603 specification
Maximum Channel Spread18 MHz (no degradation); 63 MHz (talk-around .75 dB degrad)
Current Drain (maximum)9753/9754 (15W) - 8 amperes; 9755/9756 (35W) - 15 amperes
RF Output Impedance50 ohms
Circuit Protection15-ampere fuse in power cable
1-7
Revised February 1997
Part No. 001-9750-005
GENERAL INFORMATION
SUMMIT® DM 977x (900 MHz) SPECIFICATIONS
The following are general specifications intended for use in testing and servicing this transceiver. For current
advertised specifications, refer to the specification sheet available from the Marketing Department. Specifications
are subject to change without notice.
GENERAL
Operating ModesMulti-Net, LTR, and Conventional
Frequency RangeTransmit - 896-902 MHz Std, 935-941 MHz conv talk-around
Receive - 935-941 MHz
SystemsVariable from 31-100 depending on type and number of groups
GroupsUp to 11 per system Multi-Net; up to 10 per system LTR and conv
Mounting Location9773/9775 - Dash, convertible to remote mount
9774/9776 - Remote
Transmit/Receive Separation39 MHz standard, 0 MHz conventional talk-around
Channel Spacing12.5 kHz
Channel Increment12.5 kHz
Frequency Stability
Dimensions and W ei ght2.1" (5.3 cm) H, 7.2" (18.2 cm) W, 8.3" (21.1 cm) L, 5 .0 lb (2.3 kg)
Power Requirement13.6 volts, negative ground
ComplianceFCC Parts 15 and 90
±1.5 PPM (–30° to +60° C/–22° to +140° F)
RECEIVER
Sensitivity (12 dB SINAD)0.30 microvolt
Selectivit y–70 dB
Intermodulation–70 dB
Spurious and Image Rejection–75 dB
Maximum Channel Spread6 MHz
Audio Response6 dB per octave de-emphasis per TIA 603 specification
Audio Power Output/Distortion12 watts with external 3-ohm speaker, distortion less than 3%
RF Input Impedance50 ohms
Current Drain (maximum)1.0 ampere (s tandby), 3.0 ampere (rated audio output)
9775/9776 - 30 watts (25 watts talk-around)
Power Output Range 1-2 watts or 3 dB below rated (PC programmable)
Spurious and Harmonic Emissions–67 dB (15-watt models), –70 dB (30-watt models)
FM Hum and Noise (TIA)–45 dB
Audio Modulation11K0F3E, 11KOF1D, 11KOF3D
Audio DistortionLess than 3% at 1 kHz
Audio Frequency Response6 dB per octave pre-emphasis per TIA 603 specification
Maximum Channel Spread6 MHz standard and talk-around
Current Drain (maximum)9773/9774 (15W) - 10 amperes; 9775/9776 (30W) - 15 amperes
RF Output Impedance50 ohms
Circuit Protection15-ampere fuse in power cable
1-8
Revised February 1997
Part No. 001-9750-005
SECTION 2 INSTALLATION
INSTALLATION
Item
No.
1Amplified dynamic mic250-0740-3107Self-drilling screw (4)575-9077-565
2Screw, 4-20 x 5/8” thread frmg (3)575-5604-0208Knob (4)547-0016-005
3Screw, 4-24 x 1/4” sheet metal (3)575-3604-0089Power cable (22') and hardware023-9750-010
4Microphone hanger clip023-3514-00110Accessory wire and hardware023-9750-011
5Mic hanger ground wire023-7171-911115" remote speaker250-0151-006
6Transceiver mounting bracket017-2226-034---Butt splice connector (2)586-9008-061
DescriptionPart No.
Item
No.
DescriptionPart No.
Figure 2-1 97xx Front Mount Installation Components
2.1 GENERAL
2.1.1 SCOPE OF INSTRUCTIONS
2.1.2 PERFORMANCE TESTS
Although each transceiver is carefully aligned
and tested at the factory, shipment can alter these
Since each installation is somewhat unique, the
following install ation inst ructi ons ar e int ended only as
a general guide to in stalling thi s transceive r . Describ ed
are the intended use of the mounti ng hardwar e and the
settings or damage the transceiver. Therefore, it is
good practice to check t ransc eiver perf ormance before
it is placed in s er vic e. Performance tests are located in
Sections 8.5 and 8.6.
electrical connections that should be made.
2-1
Revised February 1997
Part No. 001-9750-005
INSTALLATION
2.1.3 TRANSCEIVER PROGRAMMING
The transceiver n eeds t o be p rogra mmed bef ore i t
is placed in service unless it was ordered as factory
programmed. Programming instructions are located in
Section 4. Transceivers not factory programmed are
shipped programmed with test channels and other
factory test parameters.
The control unit used with remote-mount models
does not require special programming. However, it
does have several programming switches that may
need to be changed in some circumstances. Refer to
Section 2.5 for more information.
2.1.4 POWER SOURCE
This transceiver is designed for installation only
in vehicles which have a 12-volt, negative ground
electrical syst em. This ty pe of electrical syst em has the
negative battery terminal connected directly to the
vehicle chassis. Other types of electrical systems
require a voltage converter.
2.2 TRANSCEIVER INSTALLATION
2.2.1 GENERAL
Cable and Hardware Kit, Part No. 023-9750-010,
includes a 22-foot power cable, microphone hanger,
hanger ground wire, splice connectors, and all the
hardware (such as screws ) that is normall y required for
installation. Transceiver Mounting Kit, Part No. 0239750-012, includes a mountin g bracket with kn obs and
mounting screws. Accessory Wire Kit, Part No. 0239750-011, includes a wire assembly that is used to
connect the igni tion sense input a nd access ories . These
components are shown in Figures 2-1
and 2-3.
2.2.2 MOUNTING TRANSCEIVER
a. Check the area underneath the selected mounting
area for wiring, brake and gas lines, or ot her components that could be dam aged when the mounting
bracket is installed. Then install the mounting
bracket using the included self- dr il li ng scr ews or
other screws if desired.
2.1.5 SELECTING A MOUNTING LOCATION
The front-mount transceivers are designed for
mounting in a location near the operator such as the
dash, console, or transmission hump. The remotemount transceivers are designed for mounting in a
location such as the trunk.
WARNING
The mounting location of the transceiver or control
unit can affect safe operation of the vehicle. Follow
these precautions when installing this transceiver:
• Mount it where it does not interfere with operation
of the vehicle controls.
• Mount it where the operator can easily see the
display and reach the controls.
b. Install the transceiver in the bracket using the
included knobs.
c. With front-mount transceivers, install the micro-
phone hanger in a convenient location using the
screws for sheet metal or plastic. The hanger must
be connected to cha ssis ground f or proper operation
of functions such as monitoring and scan. If
required, ground the hanger using the included
ground wire.
2.3 POWER CABLE INSTALLATION
a. Disconnect the negative cable from the battery to
prevent damage from accidental short circuits.
NOTE: Both leads of the power cable should be
connected directly to the vehicle battery. Connection
to other points may result in increased interference
from the vehicle's electrical system. If noise is still a
problem, an optional DC noise filter is available (see
Table 1-1).
• Mount it where it will not likely cause additional
injury in case of an accident.
b. Route the red power cable to the battery. If there is
excess cable, cut it off at a convenient location and
Revised February 1997
2-2
Part No. 001-9750-005
Figure 2-2 Accessory Jack
INSTALLATION
then splice it using the included butt splice connectors. Y ou may also need to cut the cable if it must be
routed through the firewall and there is no opening
large enough to clear the fuseholder. If a hole is
drilled in the firewall, be sure to seal it when the installation is complete.
c. Connect the red power cable to the positive (+) ter-
minal of the battery.
d. Connect the blue cable to the negative (–) battery
terminal.
e. Plug the power cable into the transce iver and recon-
nect the negative battery cable.
f. Install the antenna according to the manufacturer's
instructions. Th e t r ansc ei ver ha s an “N” connector.
Check VSWR. Reflected p ower shou ld be l ess th an
4% of forward power (VSWR less than 1.5 to 1).
2.4 ACCESSORY CABLE INSTALLATION
2.4.1 GENERAL
Accessory Cable Kit, Part No. 023-9750-011, is
standard with Summit DM transceivers. This cable in
this kit plugs into the accessory pigtail coming from
the back of the transceiver. It is used for connecting
the ignition sense input and the external speaker, horn
alert, public address, and external emergency switch
accessories.
Two 8-pin connectors are included. One has a
jumper installed from pin 1 to 3 for routing audio to
the internal speaker (see next section). Also included
are two 22-foot and three 2-foot wires with attached
pins that can be used as required. Refer to Figure 2-2
and install this cable as described in the following
information.
NOTE: The ignition sense input must always be
connected because the transceiver does not operate if
it is not. In addition, the speaker jumper must be
installed to route audio to the internal speaker (except
remote-mount models).
2.4.2 INTERNAL/EXTERNAL SPEAKER
CAUTION
Do not connect either speaker output to a supply
voltage because serious damage to the audio ampl ifier
will result. (The amplifier is designed to withstand
momentary grounding of the speaker outputs.)
Internal Speaker
To enable the in ternal speaker of front-mount
transceivers, insert the plug with the jumper from pin
1 to 3 into th e accessory jack. This routes the audio on
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Revised February 1997
Part No. 001-9750-005
INSTALLATION
pin 1 back in to the internal speaker connected to pin
3. The other internal speaker terminal is internally
connected to pin 2.
External Speaker
With front-mount transceivers, 4-ohm, 15-watt
external speaker , Par t No. 250-0151-006, or equivalent
can be connected to pins 1 and 2 of the accessory
connector. Proceed as follows:
a. Locate the connector included in the Accessory
Wire Kit that does not have pins 1 and 3 jumpered.
b. If installing the external speaker listed above, the
connector pins are already attached to the speaker
wires. Insert one pin into the pin 1 location and the
other into the pin 2 loca tion. If installing some other
speaker, use a 2- or 22-foot wire as required.
Remote-mount Transceivers
With remote-mount transceivers, two wires
coming from the control cable connector are inserted
into the pin 1 and 2 slots to apply speaker audio to the
remote control unit. Refer to Section 2.5.3 for more
information.
2.4.4 HORN ALERT
The horn alert feature enables the vehicle horn or
some other type of alert such as the lights when a call
is received that is programmed for this feature. For
more operation information, refer to Section 2.4.4.
When the horn alert is enabled, pin 4 of the accessory connector goes low for 0.5 second and then high
for 0.5 second for three cycles . It then goes ba ck to the
disabled mode which is a high impedance state.
Maximum sink current is 500 mA. Some type of
dealer-supplied horn alert driver is required to use this
output. To connect the horn alert driv er circuit t o pin 4,
use an accessory cable wire. If connecting to the coil
of a relay, a diode should be connected across the rel ay
coil with the cathode to the battery side. This protects
Q403 on the audio/logic board when the relay deenergizes.
2.4.5 EXTERNAL PUBLIC ADDRESS
The speaker and microphon e au dio si gnals c an be
routed to an external public address system. A Public
Address option button or menu parameter is required
to control this feature. Refer to Section 3.5.10 for
operation information.
2.4.3 IGNITION SENSE
This ignition sense l i ne is pin 6 of the accessory
connector. It is connected using an included wire
assembly. When the ignition sense input is connected
to a source switched by the vehicle ignition switch, it
provides the following functions.
a. Power automatically turns on and off with the igni-
tion switch.
b. A turn-off delay can be programmed (see Section
3.6.7). An automatic turn-off delay may prevent
accidental discharge of the vehicle battery if the
transceiver is left on for extended periods (1 or 2
days). Standby current is approximately 1 ampere.
If these features are not used and transceiver
power is to be controlled by the front-panel power
switch only, the ignition sense input can be connected
to an unswitched source.
The public address output is pin 7 of the accessory connector. This AC-coupled output is limited to
300-3000 Hz. The typical output level is 2.2 V P-P,
and output impedance is less than 200 ohms. Use an
included accessory cable wire asse mbly to connect thi s
output.
2.4.6 INPUT B (EMERGENCY SWITCH)
An emergency swit ch can be used t o set up a hi gh
priority call (see Section 3.6.8). A front-panel option
button or an external switch such as a foot-operated
type can be used. The external emer gency switch input
is pin 8 of the accessory connector. This input is ac ti ve
low and has an internal pull-up resistor. Therefore, a
SPST normally open switch is used with one terminal
connected to pin 8 and the other to chassis ground.
(Chassis ground is available at pin 5 of the accessory
connector.) Use an included accessory cable wire
assembly to connect this switch. Refer to Section 4.7
for programming informat io n.
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Part No. 001-9750-005
INSTALLATION
Item
DescriptionPart
No.
1Amplified dynamic mic250-0740-3108Knob (4)547-0016-005
2Screw, 4-20 x 5/8” thrd frmg (3)575-5604-0209Power cable (22') and hard023-9750-010
3Screw, 4-24 x 1/4” sheet metal (3) 575-3604-00810Accessory wire and hardware023-9750-011
4Microphone hanger clip023-3514-001115" remote speaker (optional)250-0151-006
5Mic hanger ground wire023-7171-91112Plastic washer (2)596-6400-015
6Transceiver mounting bracket017-2226-03413Stainless st eel spring washer596-9260-001
7Self-drilling screw, 1.2 5 " (4)14Knob (2)032-0792-015
Transceiver 1/4”575-9077-56515Control head mounting bracket017-2226-050
Control unit #10575-9077-54516Control cable (17')597-2002-262
Figure 2-3 Remote Mount Installation Components
2.5 REMOTE CONTROL UNIT INSTALLATION
2.5.1 SETTING PROGRAMMING SWITCHES
The remote control unit does not require any
programming by the computer setup described in
Number
Item
No.
Description
Part
Number
Section 4. However, there are DIP switches on the
control unit interface board that configure the control
unit for various applications. These switches are
factory preset a nd shou ld not n eed t o be c hanged when
installing a remote-moun t tran sceiver. However, if you
want to verify the position of these switches or
Revised February 1997
2-5
Part No. 001-9750-005
INSTALLATION
program special configurations, refer to the information which follows. The location of these switches is
shown in Figure 2-4.
NOTE: In the following information, an asterisk (*)
indicates the factory default setting.
IIC Driver U102 Configuration (S100 1-4)
S100
1 234
U102 out*OnOffOnOff
U102 inOffOnOffOn
S100, 1-4 are used to switch IIC bus driver U102
in or out of the circuit. Currently, this driver is not
used, so it is always switched out.
Control Unit Address Programming (S101 5, 6)
S101
Address56R133
110*OffOffIn
Currently, address information is not used, so any
address can be programmed.
NOTE: R133 should always be “in” because if it is
“out” and TP100 is brought low to enter the setup
mode, the control unit EEPROM memory is erased.
Volume Control Configuration (S100 5, 6)
S100
5 6
Remote (standard)*OffOn
Disabled (dual contro l)OffOff
LocalOnOff
S100, 5 and 6 select which unit controls the
volume. With a remote-mount transceiver, the
“Remote” configuration is selected so that the control
unit volume control adjusts the volume of the internal
or external speaker (see Section 2.5.4).
When a control unit is used with a front-mount
transceiver to provide dual controls, “Remote” or
“Disabled” is selected. When “Remote” is selected,
the transceiver and control unit volume controls
operate in parallel (the volume level is the sum of the
levels set by both controls). When “Disabled” is
selected, only the transceiver volume control sets the
volume level. In the dual control configuration, the
levels of the transceiver and control unit internal
speakers are the same.
The “Local” setting provides a locally controlled
audio output that can be routed to a separate audio
amplifier. However, in the cur rent configu ration, this
setting cannot be used because the signal is routed to
the microprocessor and improper operation will result.
LCD Viewing Angle (S101 4)
S101-4
Settable by menu mode*Off
Fixed viewing angl eOn
S101-4 programs if the LCD viewing angle can
be set by the menu mode or is a fixed setting. If it is
settable by the menu mode, that mode and the “VIEW
ADJUST” parameter must be enabled by transceiver
programming. Any change is then permanently stored
in the control unit EEPROM memory. The displays of
the transceiver or other control units are not affected
because they can only be changed locally.
If “Fixed” is programmed, the fact or y defau lt
viewing angle is selected on power up. This default
setting can be changed by the Setup Mode (see Section
2.5.2). If a change is made by the menu mode with
“Fixed” programmed, that setting is r etained on ly until
power is turned off.
Backlight On-Off (S101-3)
S101-3
Settable by menu mode*Off
Fixed (factory setting = on)On
S101-5 programs if the backlight can be turned
on and off by the menu mode or is fixed. Operation is
similar to the LCD viewing angle described in the
preceding section. If “Fixed” is programmed, the
factory default setting of “on” can be changed by the
setup mode.
2-6
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Part No. 001-9750-005
Figure 2-4 Remote Control Unit Programming Switches
S101-1 can be used to disable t he Select kno b and
S101-2 can be used to disable the option keys. You
may want to disable these controls in applications
where the control unit acts as a slave and all control
functions are performed by the master at another
location.
2.5.2 USING SETUP MODE
The control unit has a setup mode that can be
selected to program the default setting of the LCD
viewing angle and backlight when “Fixed” is selected
as described in the preceding information. Proceed as
follows:
a. Remove the back cover of the cont rol unit and locate
TP100 on the interface board (see Figure 2-4).
b. With control unit power turned on, momentarily
ground TP100 to select the setup mode.
c. To change the default back light conditio n, press th e
Select switch so that the bac klight is eit her on or off
as desired.
d. T o cha nge the LCD vie wing angle, rot ate the Sel ect
switch in either direction to achiev e the desired
sharpness.
e. When the desired configurations have been
selected, exit the setup mode by turning power off
and then on again. The selected condition is stored
in the EEPROM as it is selected.
2.5.3 MOUNTING REMOTE CONTROL UNIT
A diagram showing a remote transceiver installation is located in Figure 2-3. A control unit mounting
bracket, 17-foot control cable, and mounting hardware are included with remote mount transceivers.
Install the control unit as follows:
a. Check the area underneath the selected mounting
location to make sure there is nothing that will be
damaged when the mounting screws are installed.
Then install the mounting bracket using the
included self-drilling screws or other screws if
desired.
b. Install the control unit in the bracket using the
included plastic washers, spr ing washers, and knobs
as shown in Figure 2-3.
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Part No. 001-9750-005
INSTALLATION
c. Install the microphone hanger in a convenient loca-
tion using the screws for sh eet metal or plas tic. T he
hanger must be connected to chassis ground for
proper operation of functions such as monitoring
and scan. If required, ground the hanger using the
included ground wire.
d. Route the control cable from the transceiver to the
control unit and plug it into both.
e. To route spe aker audio to the cont rol unit, inser t the
two wires on the transceiver e nd of the contr ol cable
into the slots for pins 1 and 2 of the accessory connector (see Figures 2 -2 and 2 -3). The order o f thes e
wires is not important.
NOTE: If the control unit is being used with a frontmount transceiver to provide dual controls, a jumper
must also be connected between pins 1 and 3 of the
accessory connector to route audio to the transceiver
speaker.
2.5.4 USING AN EXTERNAL SPEAKER WITH A
REMOTE CONTROL UNIT
(high) state. This is sensed by the microprocessor
which may t hen initiate such actions as halting scanning or enabling the conventional monitor mode.
To prevent this from happening, the transceiver
should be programmed as a remote-mount type by
selecting “Yes” for the “Remote Trunk Mount” parameter on the Main Radi o Parameters screen (see Section
4.3.2). The microprocessor then assumes that the
hanger line is always in an on-hook sta te (low). Thi s is
the only special transceiver programming that is
required to use the remote control unit.
In dual control applications, the hanger line is
controlled by a microphone, so this parameter should
be programmed “No”. The hanger line is not used in
remote-mount configurations because the microprocessor detects the control unit hanger status from data
on the serial data bus.
A 12-watt external speaker (such as th e one list ed
in Table 1-1) can be used in place of the 5-watt
speaker in the control unit. Instead of connecting the
two control cable wires to the accessory connector as
described in step e above, connect the external speaker
to pins 1 and 2 of that connector instead. It is not
recommended that an external speaker be used if an
internal speaker is also being used such as in dual
control applications.
2.5.5 MICROPHONE HANGER SENSE
When the blank front panel is installed on a transceiver , the microph one hang er li ne goes to an of f -hook
2.6 INSTALLING OPTION SWITCH KEY CAPS
A key cap kit included with each transceiver (see
Table 1-1). This kit includes key caps labeled for each
option that can be p rogrammed and a lso blank keys for
unused positions.
A key cap removal tool is included with each
transceiver in the cable and hardware kit. This tool is
simply a narrow strip of metal. To remove a key with
this tool, hold it perpendicular to the front panel and
then slide it under the lower side of the key. This
releases the key so tha t it can be pull ed out. To install a
new key cap, simply press it into the opening.
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Part No. 001-9750-005
2.7 INSTALLING DC NOISE FILTER KIT
The DC Noise Filter Kit is available as a field or
factory installed option as described in Section 1.5.
This kit contains filter choke, Part No. 542-5010-005,
which is installed in the main 13.8-volt line on the PA
board. To install this choke, proceed as follows:
a. Remove both the red and blue power cable leads
from the PC board as shown in Figure 2-5. Thi s provides the needed access to the front of the choke.
b. Prepare the leads of the choke so that they are
approximately 1/8” below the lowest part of the
choke.
c. Install the choke in the PC board holes provided and
solder the leads using a soldering iron with a long,
narrow tip. Removal of the PA board should not be
required.
INSTALLATION
d. Install the blue and red power cable leads in the
holes shown in Figure 2-5. Make sure that these
wires or the choke leads do not extend too far into
the board because a dir ect short to the chas sis cou ld
result.
Figure 2-5 DC Noise FIlter Installation
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Part No. 001-9750-005
INSTALLATION
2.8 TRANSCEIVER MOUNTING TRAY
INSTALLATIO N
2.8.1 DESCRIPTION
Optional Transceiver Locking Tray, Part No. 5857000-185, is a lockable mounting bracket for Summit
DM transceivers and other transceivers that use that
chassis. This bracket provides theft protection and
allows the transceiver to be quickly removed from the
vehicle.
2.8.2 INSTALLATION
Refer to Figure 2-6 and proceed as follows:
a. Install the transceiver in bracket MP 2 using the four
10-32 x 1/2” screws (HW2) included. If desired, this
mounting bracket can be used to mount the transceiver dire ctly to the veh icle.
b. Install lock brac ket MP1 using t he four sel f-drilli ng
screws (HW3) and washers (HW5) incl uded. Make
sure that there is nothing under the mounting location that will be damaged.
2.8.3 LOCKING AND UNLOCKING
TRANSCEIVER
To insert the transceiver with attached mounting
bracket into th e l ocki ng bracket, set it over the locking
bracket and push it rearward slightly if necessary so
that it seats. Then pull it forward until it latches.
The lock operates in a manner similar to most
glove compartment locks. To release the transceiver,
press the button and at the same time push the transceiver rearward. The key locks the button so that it
cannot be pressed.
Figure 2-6 Locking Tray Installation Diagram
2-10
Revised February 1997
Part No. 001-9750-005
SECTION 3 OPERATION
OPERATION
3.1 FEATURES
NOTE: System operator programming determines the
availability of some of the preceding features.
GENERAL FEATURES
• Up to 32-100 systems programmable (the maximum
varies with type and no. of groups)
• Each system programmable for Multi-Net, LTR, or
conventional operation
• Up to 11 (Multi-Net) or 10 (LTR and conventional)
groups programmable per system
• Liquid Crystal Display (LCD) with backlight
• Six programmable option switches
• System scan
• Group scan (except some early versions)
• User programmable system and group scan list
• Phone mode
• Horn or light alert to signal when a call is received
• Call indicator
• Proceed (clear-to-talk) tone
• Emergency switch
• Banks of systems programmable
• Time-out timer
• Five different power levels programmable on each
system
• Write-On flash memory for convenient software
updates
• Voice encryption available
• UD
2
I universal interface available (later models)
• Compatible with Summit control unit
• Cloning ability which allows one transceiver to
program another with sam e information
MULTI-NET FEATURES
• Busy queuing
• Auto-registration
• Status message transmission
• Unique ID calls to specific mobiles
• Transmit inhibit
LTR FEATURES
• Free system ringback
• System search
• Transpond
• Transmit inhibit
CONVENTIONAL FEATURES
• Busy indicator
• Tone (CTCSS) and digital Call Guard squelch
• Transmit disable on busy
• Monitor switch
• Repeater talk-around
• Priority group sampling
• Receive-only channels
3.2 FRONT PANEL CONTROLS AND DISPLAY
NOTE: The r e mote control unit front panel is the same
as the front panel on front mount transceivers.
3.2.1 FRONT PANEL CONTROLS
FRONT PANEL CONTROLS
On-Off/Volume - Pressing this knob turns power on
and off. The vehi cle ignition switch may also control
power (see Section 3.6.7). Rotating this control sets
the volume level.
Select Switch - This switch changes the selected
system or group number and is also used at other
times, such as in the Menu M ode, to select parameters
(see Section 3.5).
When it is used to change the selected system or
group, turning it clockwise increases the system or
group number and turning it counterclockwise
decreases the system or group number. Only system/
groups in the curre nt bank can be se lect ed (see Sec tion
3.6.6). After the highest system or group is displayed,
the display wraps around to the lowest system or
group and vice versa. When wrap-around occurs, a
beep sounds.
A bar above the system or group number indicates which is changed by this switch. To switch this
bar between the system and group displays, press the
Select switch. The transceiver can be programmed so
that this bar defaults to either the system or group
3-1
Revised February 1997
Part No. 001-9750-005
Transmit Indicator
Option
Switches (6)
OPERATION
PTT Switch
Optional DTMF
Microphone
Display
Mic Jack
Figure 3-1 Front Panel Controls
display. In addition, the return time can be
programmed for 1-15 seconds or infinite. (The return
time is the time that elapses before the bar goes back
to the default position.)
Option Switches - Up to six option switches can be
individually programmed to contr o l var iou s func ti ons .
The function controlled by a key is indicated by the
key cap. Refer to Section 3.5 for more information on
the option switches.
Transmit Indicator - This red indicator shows when
the transmitter is keyed .
Microphone Jack - Connection point for the microphone or the programming cable when programming
the transceiver (see Section 4).
Speaker - There is a 5-watt, 16-ohm speaker located
behind the grille. If hi gher power output is desired, an
optional 4-ohm external speaker may be used to
provide up to 12 watts of power. The internal speaker
is disabled when an external speaker is used (see
Sections 2.4.2 and 2.5.4).
On-Off/Volume
Select Switch
Speaker
Power Jack - Connection point for the 12-volt, negative ground power source.
Accessory Jack - Connection point for the ignition
sense line and also accessories such as an external
speaker and horn alert (see Section 2.4).
Remote Control Unit Jack - Conn ectio n point f or the
remote control unit. The pigtail wit h this jack is
optional with front mount transceivers.
DC Power
Jack
REAR PANEL JACKS AND CONNECTORS
Antenna Jack - Type N jack for connecting antenna.
Remote Control
Unit Jack
Accessory
Jack
Figure 3-2 Back P anel Jacks And Connectors
Revised February 1997
3-2
Part No. 001-9750-005
Antenna
Jack
OPERATION
3.2.2 DISPLAY
Backlight - The display has a backlight which can be
programmed to automatically turn on with transceiver
power or it can be contr oll ed manual ly by the BKLHT
option switch or Menu Mode “BACKLIGHT”
parameter (see Sect ion 3.5.5).
Phone
Sys/Grp
MON
Alphanumeric Display
Monitor
BUSY
Encryption Enabled
CALL
System
Number
Status
Display
Group
Number
Figure 3-3 Front Panel Display
System Number - Indicates the currently selected
system number. System numbers up to 99 can be
programmed.
Group Number - Indicates the currently selected
group number. Group numbers up to 11 (Multi- Net)
or 1 (LTR/conventional) can be programmed.
Alphanumeric Display - This 10-character area of the
display indicates the unique identification for the
selected group. For example, “GAS TRUCK” can be
displayed when a certain group is selected. It also
displays telephone numbers in the phone mode and
various error and status messages.
P1/P2 - When a conventional system is selected,
“P1” indicates that a call is being received on a
priority 1 group, and “P2” indicates that a call is
being received on a priority 2 group. Refer to
Section 3.5.17 for more information.
ON/OF - When the menu mode is selected by the
MENU switch, “ON” indicates that the displayed
parameter is active, and “OF” indicates that it is
inactive.
- Indicates that the function controlled by the
option switch above it is active. For example, this
symbol below the Scan switch indicates that the
scan mode is enabled. Only certain switches
require this indicator.
- Indicates that the displayed system/group is
programmed for telephone or special calls.
- Indicates that encryption is enabled.
MON - Indicates that the monitor mode has been
enabled by taking the microphon e off-hoo k or pressing
the MON switch (conventional systems only). The
monitor mode disables Call Guard squelch and scanning so that all messages are heard on the channel.
BUSY - Indicates when the selected system/group is
busy (conventional systems only). If this indication
appears but no message is heard and Call Guard
squelch is programmed, a call for someone else was
probably detected.
Stat us Displ ay - These two characters indicate the
following status information:
- Rotating clock-like symbols in both positions
indicate that system scanning is occurring. This is
also indicated during programming.
- This symbol in the left position indicates that
the display ed system is in the scan list. Likewise,
this symbol i n the right po sition indicates that the
displayed group is in the scan list.
- This symbol in the rig ht pos it ion indicates that
group scanning is occurring.
CALL - Indicates that a call was received while the
user was away from the vehicle. It is turned off by
pressing the Select switch, an option switch, or the
microphone push-to-talk switch, or by turning power
off and then on again. Refer to Section 3.6.2 for more
information.
“
–” - The bars above the system and group digits indi-
cate which display wi ll be cha nged if the Selec t switch
is turned. Refer to the Select switch description in the
preceding section for more information.
Revised February 1997
3-3
Part No. 001-9750-005
OPERATION
3.3 OPERATING MODES
3.3.1 INTRODUCTION
Each selectable system can be programmed with
a unique set of transceiver operating parameters. One
of these parameters is the operating mode which can
be Multi-Net, LTR, or conventional. The type or types
of operation programmed is determined by the radio
equipment that is being accessed by that system. The
basic operating diff erences between these system
types are as follows.
3.3.2 MULTI-NET AND LTR MODES
The Multi-Net mode provides the most powerful
operating features. Features available only with MultiNet operation include Busy Queuing, Status Messages,
Auto-Registration, and special calls (see Sections 5.7
and 5.8).
The LTR mode of operation is similar to the
Multi-Net mode. The main difference is that the
preceding features are not available. The features that
are unique to LTR operation are described in Section
3.8. In both the Multi-Net and LTR modes, channel
selection and monitoring before transmitting are
performed automatically by the transceiver. Telephone calls (if available) can be placed almost as
conveniently as with a standard telephone. Busy and
out-of-range conditions are indicated by special tones
and display messages.
3.3.3 CONVENTIONAL MODE
General
Selecting a convention al syste m selects a specifi c
radio channel, and selecting a group (if available)
selects the type of s quelc h control u sed on that channel
such as carrier or Call Guard tone (CTCSS) or digital
squelch. This selects the specific mobiles or group of
mobiles being called and which calls are received on
that channel.
Channel selection is performed manually by
selecting a system. Monitoring can be performed automatically or manually (see next paragraph) When it is
performed automatically, a special tone and display
message indicate a busy condition. Otherwise, there
are no tones or display messages to indicate busy and
out-of-range conditions.
Monitoring Before Transmitting
If the Transmit Disable On Busy feature is
programmed (see Section 3.9.1), monitoring is
performed automatical ly. Otherwise, it is perf ormed as
follows:
• If not scanning, note if “BUSY” is being displayed.
If it is not, the channel is free and a messa ge can be
transmitted.
• If scanning, take the microphone off-hook to halt
scanning and enable the monit or mode (indicated by
“MON” in display). The monitor mode (see Section
3.9.3) can also be selected by the MON switch if
available. This mode disables any squelch control
features so that all messages are heard. If no
messages are heard, the channel is free and a
message can be transmitted. If the transceiver is
programmed to not detect an of f-hook condition, the
MON switch or the Transmit Disable On Busy
feature must be used to perform monitoring.
3.3.4 MULTI-NET AND LTR SYSTEM/GROUPS
Systems
When the system is programmed for Multi-Net or
LTR operation, information such as home repeater, all
encode and decode ID codes, and call indicator and
horn alert operation is programmed. The ID codes can
be fixed priority, selectable, and block types. The
types of ID codes and the number of I D code s th at can
be programmed in each category are as follows. Any
combination of codes can be programmed and all
codes can be different.
Decode (Receive)
Fixed Priority
2 (M-Net & LTR)---
Selectable
11 (Multi-Net) 11 (Multi-Net)
10 (LTR) 10 (LTR)
Encode (Transmit)
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OPERATION
Block
Up to all 225 (M-Net)--Up to all 250 (LTR)---
Groups
Each group switch position selects one of the
selectable ID codes. O nly the selected ID code is
encoded when transmitting because it is not possible to
encode more than one code. Group scan programming
determines how the selectable ID codes are detected.
Without group scan, only the selected ID code is
decoded; with group scan, all selectable codes are
decoded.
The fixed priority and block ID codes are always
decoded regardless of which group is sele cted or group
scan programming (if the system is selected or
scanned). When a fixed priority ID code is detected,
the selectable groups of that system are checked to see
if any are programmed with the same code. If one is
the same, the number and unique identification of that
group are displayed. If none are programmed with the
priority ID code, “PRIORITY 1” or “PRIORITY 2” is
displayed and the group number does not change.
When a block ID code is detected, the group number
never changes and “BLOCK CALL” is displayed.
immediately drops that call and switches to another
repeater to receive the higher priority call.
The priority order of the receive ID codes is as
follows:
1.Fixed Priority ID Code 1
2.Fixed Priority ID Code 2
3.Selectable ID Codes (w ith last sel revert prog)
4.Block ID codes
For example, if a call is being received on selectable group 4 and a c al l i s detected on priority ID 2, the
call on group 4 is immediately dropped and the transceiver switches to the call on priority ID 2.
If the system is programmed for Multi-Net operation, incoming call information is received on both the
status repeater and the repeater to which a mobile is
trunked (refer to Section 5.6). Therefore, a priority call
is not missed even if a mobile is not using its home
repeater. With LTR operation, call information is
received on only the ho me repea ter. Therefore, priority
calls are not detect ed while trunked to some other
repeater. Other times when priority calls could be
missed with both types of systems are when some
other system not programmed with the priority ID is
being monitored and while transmitting.
The Scan Resume Delay described in Section
3.4.3 determines how long the priority or block group
is displayed a fter t he cal l en ds. In a dditi on, if a pr iori ty
call is received on a selectable group, the “Scan Revert
Mode” programming described in Sections 3.4.4 and
3.4.5 determines if a res ponse occ urs on the disp layed,
last selected, or fixed group. With block calls and
priority calls not on a selectable group, a response can
be made by manually selecting a system/group
programmed for that purpose.
Receive Priority ID Codes
The fixed, selectable, and block ID codes have a
priority order so that an incoming call with a higher
priority ID code can inte rrupt a lower priority call in
progress. One use of receive priority is to allow a
dispatcher to interrupt calls in progress with an important “all call” message. If the transceiver detects a call
with a higher priority ID than the one it is receiving, it
With Mul ti-Net oper ation, cer tain types of special
calls may also interru pt st and ard or other special call s.
Table 3-1 shows which Multi-Net calls can interrupt
another type. Multi- Net operation also has an access
priority which is discussed in Section 5.8.2.
Standard Calls
Standard calls are between mobiles or groups of
mobiles assigned to the same home repeater. They use
the standard group ID codes from 1-225 as described
in Section 5.7 (1-250 with LTR calls). A standard call
is placed by simply selecting a group programmed
with the desired group ID and then pressing the PTT
switch. No number is dialed using a keypad as with
special calls. To receive a standard call, the mobile
must be programmed to decode the group ID code
being transmitted. With all Multi-Net calls, unique ID
code information is al so tr ans m it te d b y the ori ginating
mobile. However, it is not decoded when receiving a
standard call.
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Part No. 001-9750-005
Table 3-1 Multi-Net Standard And Special Call Receive Priority
Interrupting Call
OPERATION
Call in Progress
Standard
Group
Intercon-
nect
Auxiliary
Interro-
gate
KillReassign
Emer-
gency
All Call
Standard Group[1][1][1]YesYesYesYe sYes
InterconnectNoNoNoNoYesYesYesYes
AuxiliaryNoNoNoNoNoNoYesYes
InterrogateNoNoNoNoNoNoYesYes
KillNoNoNoNoNoNoYesYes
Reassignment NoNoNoNoNoNoYesYes
EmergencyNoNoNoNoNoNo--- Yes
All CallNoNoNoNoNoNo[2]--
[1] With these calls, the priority order is determined by the type of ID code as described in Section 3.3.4.
[2] Since the “All Call” call goes out on all system repeaters, the emergency call is not sent until that call is
finished.
3.4 SCAN (SYSTEM AND GROUP)
While scanning is occurr ing (rotating symbols in
the status display), the display always indicates the
3.4.1 INTRODUCTION
system/group on which a transmission would occur.
However, when a call is received, the display changes
The system scan feature monitors the
programmed systems of the current bank. When a
message is detected that the transcei ver is programmed
to receive, scanni ng stops and the messa ge is r eceiv ed.
Shortly after the message is complete, scanning
to the system/group of the call and this may not be
where a transmission occurs (see Section 3.5.21).
When the delay period expires (see Section 3.4.3), the
system/group on which transmissions occur is again
displayed.
resumes.
System scanning is turned on and off by the
SCAN option switch (see Sect ion 3.5.19). When
system scanning is enabled by an option switch, a
triangle (
∆ ) is indicated in the display below the
switch. The microphone must also be on-hook for
scanning to occur (unless off-hook detection has been
disabled by programming). When system scanning is
actually occurring, either “SNGLE SCAN” (singlesite) or “MULTI SCAN” (multi-sit e) is i ndicated in the
alphanumeric display (see next section). In addition,
two rotating symbols are present in the status display
between the system and gr oup numbers a s described i n
Section 3.2.
Scanning is sequential through the programmed
systems in the current bank unless they have been
deleted from the scan list or single-site scan is used.
The selected system and group can be changed while
scanning using t he Select switch in the no rmal man ner.
Scanning temporarily halts while the change is being
made.
3.4.2 MULTIPLE- AND SINGLE-SITE SCAN
Each bank can be programmed for either MultiSite or Single-Site scan. This can also be selected by
the user if the Menu Mo de “SCAN SELCT” parame ter
is available (see Section 3.5.21). The type of scanning
currently selected is indicated by “SNGLE SCAN” or
“MULTI SCAN” in the alphanumeric display when
scanning is occurring. The single-site type should be
used when only Multi-Net systems programmed with
the same site number are to be scanned. Otherwise, the
multiple-site type should be used. These types of scan
operate as follows:
Single-Site Scan - Calls are detected on only systems
in the current bank that are programmed with the site
number of the revert sys te m. For e xampl e, i f System 2
was displayed when scanning was turned on, only
systems programmed with the System 2 site number
are scanne d. For more information on sites, refer to
Sections 4.4.4 and 5.4.
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OPERATION
If LTR or conventional systems are also
programmed, they are skipped in the scan sequence
because only Multi-Net systems are scanned. If an
attempt is made to enter scanning on with an LTR or
conventional system displayed, scanning can be
selected only if Mult i- Net auto-registration is enabled.
Auto-registration then occurs and scanning begins on
that site. If auto-registration is not programmed, an
error tone sounds, “NOT MULTI” is displayed, and
the scan mode is not entered.
The single-site type of scanning is very efficient
because only the status repeater of the site is monitored which means that no waiting is required to
change channels. The data from the status repeater is
checked against the home repeater/group ID codes of
all selectable systems programmed with that site
number. If there is a match, the transceiver swi tch es t o
the appropriate repeater and receives the call.
If no traffic is d et ect ed on the st atus channel for a
period of time, the transceiver begins scanning the
home repeaters of all systems programmed with the
site number being scanned. This ensures that scanning
occurs even if the status repeater is not on the air. The
status channel also continues to be scanned, and
normal scanning of the status channel resumes when
messages are again detect ed. When home re peaters a re
scanned, data messages are decoded for only as long
as necessary to detect all calls on that repeater.
Multiple-Site Scan - This type of scan is programmed
when more than one site is scanned or if LTR or
conventional systems are to be scanned. The status
channels of Multi-Net systems are scanned as are the
home repeater of LTR systems and the channels of
conventional systems. As with Single-Site Scan, if the
status channel of a particular Multi-Net site is not in
service, the ho me channels are scanned until messages
are again detected on that status channel. All system/
groups in the current bank (see Section 3.6.6) are
scanned unless they are deleted from the scan list.
3.4.3 SCAN RESUME DELAY
NOTE: The following timers are also used is some circumstances when not scanning, such as when priority
or block calls are received as described in Section
3.3.4.
Receive Delay
When a message is received whi le scanning, the re
is a programmable delay of 0-7 seconds before scanning resumes (if it has not been disabled, such as by
taking the microphone off-hook). This delay is called
Receive Delay Time and it prevents another message
from being received before a response can be made.
This delay is also in effect if a front panel control is
changed while scanning such as to select another
system/group. This tim er is reset if another call is
received.
Transmit Delay
The Receive Delay Time controls the scan delay
until the transmitter is keyed and then the Call Delay
Time controls the delay. This time is also programmable for 0-7 second s a nd i t e nsu res that a response to
your message is heard instead of some other message
occurring on another system/group. The Call Delay
Timer remains active for the remainder of the conversation and controls w hen normal scanning resumes
even if additional responses are received.
Scan Continue Ti mer
There is also a scan continue timer that can be
programmed. This timer control s the maximum time
that a call is received before scanning resumes. This
prevents scanning from be ing del ayed for long per iods
by lengthy calls. This time can be programmed for 060 seconds in 1-second increments. If “0” is
programmed, there is no time limit and the entire
message is always received.
3.4.4 TRANSMITTING IN THE SCAN MODE
NOTE: If Auto-Registration is used, the revert system
may change automatically. Refer to Section 3.7.2 for
more information.
Programming of the “Scan Revert Mode” radio
parameter determines the system/group on which
transmissions occur in the scan mode. In addition, if
this programming causes the selected system/group to
change, it affects the system/group that is selected
when the scan mode is exited by pressing the Scan
switch. An exception when it does not control the
transmit system/group is if the bank is programmed
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Part No. 001-9750-005
OPERATION
with a fixed transmit system/group as described in
Section 3.4.5. The three programmable configurations
are as follows:
Last Selected System/Group - Transmissions always
occur on the sy stem/gr oup t hat wa s las t se lecte d by the
Select switch. To respond to a call not on the selected
system/group, the scan mode must be exited by
pressing the scan switch. If this is done before scanning resumes, the system/group of the call becomes
the selected system /group and it is not necessary to
change it manually. The system/group of the call is
displayed until the microphone is taken off-hook, the
PTT switch is pressed, or the scan delay expires.
Last Received - The se lected s ystem/grou p changes t o
the system/group of a call. Therefore, the user can
always respond to a call without having to manually
change the system/group.
Temporary Last Received - The system/group
changes to the syst em/group of a call for only the
duration of the scan resume delay period described in
Section 3.4.3. Then when the delay expires, the
selected system/group is again displayed. Therefore, a
response to a call can be made without changing the
selected system/group if it occurs before scanning
resumes.
3.4.6 SCAN LIST PROGRAMMING
Systems and groups can be added to or deleted
from the scan list if the transceiver is equipped with an
A/D (add/delete) option switch. The bar above the
system or group indicates which will change when the
A/D switch is pressed. To switch this bar between the
system and group displays, press the Select switch.
The scan list status of a system or group is indicated in the status display. An next to the system
number indicates that the displayed system is in the
scan list and scanned normally. Likewise, an next to
the group number indicates that the displayed group is
in the scan list. When scanning is occurring, the scan
list status is not indicated because the rotating scanning
indicators are displayed.
The selected group is always scanned, even if it is
deleted. Therefore, if all systems or groups are deleted,
the selected group is still scanned. Systems and groups
can be deleted from the scan list while listening to a
message on the system or group by pressing the A/D
key in the normal manner. Scanning resumes shortly
after the system or group is deleted. Deleting a system
only temporarily deletes the groups associated with that
system. Therefore, when a system is added back into
the scan list, the original group scan list is again active.
NOTE: If a transmit request is received from a data
device, the preceding programming is overridden (see
Section 3.6.11).
3.4.5 FIXED TRANSMIT IN SCAN MODE
If a system and group are entered for the “Fixed
System/Group Transmit During Scan” bank parameter,
this programming may
take precedence over the “Scan
Revert Mode” programming described in the preceding
section. If the transmitter then is keyed while scanning
is occurring (rotating status display), transmissions
occur on the programmed fixed system/group. In addition, it becomes the selected system/group. Since taking
the microphone off-hook halts scanning unless off-hook
detection is disabled, the transmitter must usually be
keyed with the microphone on-hook. If the transmitter
is keyed with scanning halted or when no system/group
is programmed for this parameter, the programming
described in the preceding section takes precedence.
The transceiver can be programmed to either save
or not save changes to the scan list. This programming
can be done by the system operator or by the user if the
Menu Mode “SCAN SAV” parameter is selectable.
Changes are saved when “ON” is selected, and not
saved when “OFF” is selected. Therefore, to store a list
with the menu mode, select “ON”, program the list,
then select “OFF”. When power is cycled, the scan list
then returns to the status the existed when “OFF” was
selected. If the menu parameter is not selectable, the
scan list returns to the last selected status if “ON” is
programmed, and to the dealer programmed default
state if “OFF” is programmed.
3.4.7 GROUP SCAN
Each system can be programmed for Group Scan
using the programming software. There is no switch for
selecting this feature. Group scanning occurs whenever
a system programmed for group scan is selected or
scanned with the microphone on-hook (the scan mode
3-8
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Part No. 001-9750-005
Table 3-2 Menu Mode And Option Switch Functions
OPERATION
FUNCTION
A/D (Scn List Prg)XA/DLTR System SearchX
Auto-RegistrationXMenu Mode SelectXMENU
Auxiliary 1XXAUX 1MonitorXMON
Auxiliary 2XXAUX 2Phone Mode SelectXXPHONE
BacklightXXBKLHTPriorityXXPRI
Bank SelectXXBANKRadio TonesX
Call Guard DisableXC GScan On/OffXSCAN
EmergencyXEMERScan List SaveX
EncryptionXXENCPTScan TypeX
Ext PA (Mic audio)XXPA-MCSiren (see Aux 1/2)XSIREN
Ext PA (Rx audio)XXPA-RXStatus SelectXXSTAT
Home Sys/GrpXHOMETalk-Aro undXXTA
Horn/Light AlertXXHORNViewing Angle AdjX
MENU
ITEM
does not need to be se lected). If off-hook detection is
disabled by programming, group scanning is always
enabled if it is programmed. Group scanning is indi-
OPTION
SWITCH
SWITCH
LABEL
FUNCTION
MENU
ITEM
OPTION
SWITCH
SWITCH
LABEL
are received regardless of which group is selected or
group scan programming (if the system is selected or
scanned).
cated when all the segments of the status display adjacent to the group number are on. There is no group
Conventional Systems
scan indicator when system scanning because rotating
symbols appear in both locations of the status display.
Group scan programming also determines
whether calls are received on all groups or only the
When group scan is occurring, calls are received
on all selectable groups of a system regardless of which
is selected. In addition, the display automatically
changes to the group on which a call is received.
Without group scan, calls are received on only the last
selected group of each system. The group scan list can
last selected group of conventional systems. Call
Guard squelch is detected on the selectable groups of
conventional systems if the monitor mode is not
enabled (see Section 3.9.3). If the monitor mode is
enabled, all calls occurring on a system (channel) are
received.
be programmed as described in the preceding section.
In addition, the scan resume delay information
described in Section 3.4.3 also applies to group
scanning.
Priority groups can also be sampled when scanning conventional systems. This feature ensures that
important calls on the priority group or groups are not
missed while listening to calls on non-priority groups.
3.4.8 SCANNING THE VARIOUS TYPES OF
See Section 3.5.17 for more information.
SYSTEMS
3.5 OPTION SWITCH AND MENU MODE
Scanning Multi-Net and LTR Systems
FUNCTIONS
Group scan programming described in the
preceding section controls whether all groups or only
the last selected group of Multi-Net and LTR systems
are scanned. If fixed priority or block ID codes (see
Section 3.3.4) or Multi-Net ID codes 236 or 237 (see
Table 4-2) are programmed, calls on those ID codes
3.5.1 INTRODUCTION
This transceiver can be equipped with up to six
option switches. The functions which can be
controlled by these s wit ches are indicated in Table 3-2
by an “X” in the “OPTION SWITCH” column
Revised February 1997
3-9
Part No. 001-9750-005
.
OPERATION
If the transceiver is equipped with a MENU
option switch, the Menu Mode can also be selected to
control various functions. The functions that can be
controlled by the Menu Mode are indicated in
Table 3-2 by an “X” in the “MENU ITEM” column.
System operator programming controls which
functions are displayed in the Menu Mode and also
which option switche s ar e a vailable. Therefore, a function can be fixed by system operator programming by
disabling that menu item, programming the default
condition, and not programming an option switch to
control it. Refer to Section 3.6.5 for more information
on creating a radi o profile. If a function is assigned to
an option switch, it is not available as a menu item.
If a call is received or transmitted while in the
Menu Mode, the Menu Mode is exit ed and any
changes are saved. The menu mo de is selected as
follows. The Menu Mode and option switch functions
are described in the following sections.
Selecting The Menu Mode
a. Press the MENU switch to select the Menu M ode.
Then turn the Select switch to select the parameter
to be modified.
b. If the paramete r has on ly on/ off choices , the cu rrent
status is shown as “ON” or “OF” in the status display (located between the system and group numbers). To change the status, press the Select switch.
c. If the parameter has several choices , the cur rent s ta-
tus is displayed by pressing the Select switch and
changed by rotating the switch.
d. The Menu mode is exit ed and the change s sav ed by
pressing the MENU switch or i f a call is receive d or
the transmitter keyed. Changes are automatically
saved and the Menu mode exited 2 seconds after
changing a parameter or 10 seconds after no
activity.
which is changed. To move this bar between the
system and group, press the Select switch. An asterisk
in the status display next to the system or group
indicates that it is in the scan list. Refer to Section
3.4.6 for more information.
3.5.3 AUTO-REGISTRATION
This Menu mode feature is indicated by “MN
AUTOREG”, and it is used to turn Multi-Net a utoregistration on and off (see Section 3.7.2).
3.5.4 AUXILIARY 1 AND 2
Up to two auxiliary functions can be turned on
and off by the Menu Mode “AUX 1” and “AUX 2”
parameters or the AUX 1 and AUX 2 option switches.
(There is also a SIREN key cap that can be used for
these switches.) When a switch is used, the on condition is indicated by a triangle in the display under the
switch. The output lines fo r thes e func tions come fr om
optional universal inter fa ce connector J601. Auxiliary
1 is pin 14 (AUX 1), and Auxi liary 2 is pin 16
(OUTPUT B). These outputs are active high. Refer to
Section 4.7 for programming information.
An appropriate driver circuit is required to utilize
these outputs. Maximum source current of AUX 1 is
50 mA and the output voltage is 8 VDC
±10%.
OUTPUT B is a TTL output that can provide approximately 10 m A of drive current.
3.5.5 BACKLIGHT
The Menu Mode “BACKLIGHT” parameter or
the BKLHT option switch can be used to turn the
display backlight on and off. This light allows the
display and option keys to be seen in low-light conditions. If this feature is not controlled by the Menu
mode or option switch, it is usually programmed
“Enabled” so that it turns on with transceiver power.
3.5.6 BANK SELECT
3.5.2 A/D (SCAN LIST PROGRAMMING)
The A/D option switch is used to add system/
groups to or delete them from the scan list. Pressing
this switch changes the status of either the displayed
system or group. The bar above the number indicates
If banks of systems have been programmed, the
Menu Mode “BANK SELCT” parameter or the
BANK option key is used to enable the bank select
mode. The Se lect switch is then turned to move to the
desired bank and then pressed to select that bank.
Refer to Section 3.6.6 for more information.
Revised February 1997
3-10
Part No. 001-9750-005
OPERATION
3.5.7 CALL GUARD SQUELCH DISABLE
The CG option switch is used to disable both
transmit and receive Call Guard squelch on the
selected conventional system/group (if it has been
programmed). It does not affect Call Guard squelch
operation on other s ystem/ group s. The d isabl e mode i s
indicated by a triangle in the display under the switch.
See Section 3.6.2 for more information.
3.5.8 EMERGENCY
This switch is normally the swit ch on the l eft side
of the display. It can also be an external type such as a
foot-operated switch. The Emergency switch is
pressed to t ransmit a high priority message. Re fer to
Section 3.6.8 for more information.
3.5.9 ENCRYPTION
The ENCYPT option switch or “ENCRYPTION”
Menu Mode parameter allows the user to override the
system operator programming on the group. The
triangle/circle symbol indicates when encryption is
enabled. Refer to Section 3.6.12 for more
information.
3.5.10 EXTERNAL PA
HOME option switch. This function can also be used
in the scan mode (scanning halts for the length of the
receive scan delay).
3.5.12 HORN/LIG H T AL E RT
An external alert such as the vehicle's horn or
lights can be used to signal a call. The Menu Mode
“HORN/LIGHT” parameter or the HORN option
switch can be used to turn this alert on or off. The on
condition of the switch is indicated by a triangle in the
display under the switch. See the Horn Alert description in Section 3.6.4 for more information.
3.5.13 LTR SYSTEM SEARCH SELECT
The Menu Mode “LTR SEARCH” parameter
enables or disables the LTR system search feature
(refer to Se ction 3.5.13). If it is ena bled, the transceiver automatically searches for an in-range system
whenever an out-of-range condition occurs when
making an LTR telephone call.
3.5.14 MENU SELECT SWITCH
The MENU option switch selects the Menu mode
described in Section 3.5.
If the vehicle is equipped with a public address
system, this feature all ows t he tr ans ce ive r microphone
to be used to speak over that system. Eith er the Menu
Mode “EXTERNL PA” or the PA-MC option switch
can be used to activate this feature. When this feature
is active, the transmitte r is disabled and the alph anumeric display indicates “MIC TO PA”. The PA output
is pin 7 of the accessory cable (see Section 2.4.5).
The receive audio signal can also be heard on the
public address system (as well as from the regular
speaker). Either the Menu Mode “EXTERNL PA”
parameter or the PA-RX option switch can be used to
activate this feature. The alphanumeric display indicates “RCV AUD PA” when this feature is active . The
output for this function is also pin 7 of the accessory
cable.
3.5.11 HOME SYSTEM/GROUP
Each bank can be programmed with a “home”
system/group that can be selected by pressing the
3.5.15 MONITOR MODE SELECT SWITCH
The MON option switch is used to select the
monitor mode described in Section 3.9.3.
3.5.16 PHONE MODE SELECT
The PHONE option switch or “TELEPHONE”
menu parameter is used to select the phone mode
which is used to p lace tel ephone ca lls. Refe r to Sect ion
3.6.13 for more informat ion on this mode.
3.5.17 PRIORITY
The PRI option switch or Menu Mode
“PRIORITY” parameter enables or disables priority
group sampling on conventional systems if priority
groups are programmed. Refer to Section 3.5.17 for
more information.
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OPERATION
3.5.18 RADIO SOUNDS
The Menu Mode “RADIO SNDS” parameter
selects the tones that are heard when switches are
pressed or busy or out- of-range condition s exist. If this
menu item is not enabled, the tones that sound are
fixed by system operator programming. The four
available conditions are as follows:
Silent - No tones at all sound.
Key Beeps Only- Only the option switch and
Select switch beeps sound.
Alert Tones Only - The proceed, busy, and inter-
cept tones sound, but not the key beeps.
All Tones - All tones sound.
3.5.19 SCAN ON/OFF
The SCAN option switch can be used to turn the
system scan feature on and off (see Section 3.4). The
on condition is indicated by a triangle under the
switch. Without this switch, scanning is not available.
3.5.20 SCAN LIST SAVE
The Menu Mode “SCAN SAV” paramete r s ele ct s
if changes t o the scan list are saved when power is
turned off. If “ON” is selected they are saved, and if
“OF” is programmed they are not saved. Refer to
Section 3.4.6 for more information.
3.5.21 SCAN TYPE
The Menu Mode “SCAN SELCT” parameter
selects the type of system sca nning tha t occurs when it
is enabled by the SCAN switch. Either “M ULTI SITE”
or “SNGLE SITE” can be selected. The type of scanning is indicated in the alphanumeric display when
scanning is occurring. Refer to Section 3.4.2 for more
information.
3.5.22 STATUS SELECT
The Menu Mode “STATUS” parameter or STAT
option switch is used to display or change the status
message that is being transmitted each time the transmitter is keyed with a Multi-Net system selected. Up
to eight status messages may be programmed by the
programming software. The Select switch is rotated to
choose the desired condit ion and t hen presse d to sel ect
that condition. Refer to Section 3.7.3 for more information.
3.5.23 TALK-AROUND
The Menu Mode “TALKAROUND” parameter
or TA option switch is used to turn talk-around on and
off on conventi onal groups. Refer to Section 3.9.4 for
more information.
3.5.24 VIEWING ANGLE
The Menu Mode “VIEW ADJ” para meter set s the
viewing angle of the display. This provides optimal
intensity when the Liquid Crystal Display (LCD) is
viewed from the selected viewing angle. If you have
trouble viewing information in the display, especially
in low-light conditions , try changi ng this param eter.
Viewing angles represented by 0-15 can be
selected. “0” = -45
° and “15” = +45°. Note that when
toggling from “15” to “0”, the display may appear to
indicate all 8's. However, this is not what is actually
being displayed because the correct information is
indicated when it is viewed from -45
°.
3.6 GENERAL FEATURES
3.6.1 TIME-OUT TIMER
The Time-Out Timer automatically disables the
transmitter if it is keyed continuously for longer than
the programmed time. It is programmable using the
programming software for 0.5-5 minutes in halfminute increments. It ca n al so be disabled by programming “disabled”. When the timer times out, the transmitter is automatically disabled, the intercept tone
sounds, and “TX TIMEOUT” is displayed. Five
seconds before time-out occurs, a warning beep
sounds. The timer is rese t by relea sing the PTT switch.
This feature prevents a channel from being kept
continuously busy by an accidentally keyed transmitter. It also prevents possible transmitter damage
caused by transmitt ing for extended periods.
3.6.2 CALL INDICATOR
The call indicator is the w ord “CALL” in the
display. The purpose of this indicator is to show when
a call is received while the user was away from the
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vehicle. To turn this indicator off, change any front
panel control, tak e t he mic ro phone off-hook, press the
PTT switch, or turn power off and then on again. The
call indicator operates in both the scan and non-scan
modes. It is disabled during the scan delay periods
described in Section 3.4.3.
With Multi-Net and LTR operation, the call indicator can be programmed to activate on specific fixed
priority and selectable ID codes. It does not activate
when calls are received on block ID codes. With
conventional operation, the call indicator can be
programmed to activate on each group. If a group is
programmed for carrier squelch or if the monitor
mode is enabled, it turns on when a carr ier is detect ed.
If Call Guard squelch is used, it turns on when the
Call Guard tone or code is detected.
3.6.3 PROCEED (CLEAR-TO-TALK) TONE
This is a short tone that sounds when the PTT
switch is presse d. It indic at es tha t the radio sy stem has
been successfully accessed (data handshake
completed) and speaking can begin. It is available on
LTR and Multi-Net systems without any special
programming and can be enabled or disabled on
conventional systems . This and other t ones can a lso be
enabled or disabled by the Radio Sounds parameter
described in Section 3.5.18.
When making any type of Multi-Net or LTR call,
if the busy tone sounds and “SYSTEM BSY” is
displayed when the PTT switch is pressed, the system
is busy. If the PTT switch i s held down, the system is
accessed and the proceed tone sounds when it is available. If an out-of-range or some other error condition
exists, the intercept tone sounds and the error condition is displayed.
If the proceed tone has been programmed on
conventional systems, it does not sound if the channel
is busy, but does sound even if an out-of-range condition exists. This occurs because there is no handshake
that can be used to detect this condition. The channel
should still be monitored manually because the transmitter always keys when the PTT switch is pressed
(unless the Tr ansmit Disable On Busy feature is being
used).
individually enabled or disabled on each dispatch
group (a fixed delay of approximately 500 ms occurs
with interconnect and au xiliary c alls). This fe ature can
be used to delay speaking with calls which have a
longer setup time. This delay is available only with
transceiver software, Version 222 or later, and
programming software, Version 206 or later.
3.6.4 HORN/LIGHT ALERT
General
This feature activ ates an exte rnal aler t such as the
vehicle's horn or lights when calls are received on
groups or priority ID codes programmed for this
feature. When enabl ed as des cr ibe d i n this section, the
alert turns on for 0.5 secon d and off for 0.5 second for
three cycles (3 seconds). It then goes back to the
disabled state. Inst allation is described i n Section 2.4.4.
NOTE: In early 1996, a new version of transceiver
software began shipping that allows two modes of
horn alert operation to be programmed. New programming software is also required to program the
additional mode. The transceiver software is Version
213 or later (see Appendix A), and the programming
software is Version 204 or later (see Section 4.1.5).
Another change occurred with Version 214 software t o
make Mode A totally manual (Mode A-1 described
below is then no longer available).
Operation in Mode A and B
Horn alert operation of earlier models (versions
prior to 213) is always Mode A-1. The revised transceiver software and
programming software are
required to program Mode B.
A power-off delay can be programmed to occur
when power is turned off by the ignition switch (s ee
Section 3.6.7). If the ignition switch does not control
power, only the front panel power switch affects operation in the following modes. Once transceiver power
is turned off by the power or ignition switch or turnoff delay, the horn alert is no longer functional.
Mode A-1 (Automatic Off/Manual On)
(Transceiver Software Version 213 and earlier)
With later models, a proceed tone delay of 125 -
1875 ms can be programmed on each system and then
Ignition Switch
- The horn alert always turns off when
the ignition switch is turned on (with the power switch
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OPERATION
on) but does not automatically turn back on again
when the ignition switch is turned off. Therefore, it
must be manually turned on after starting the vehicle.
Power Switch
- The current horn alert mode does not
change when power is turned on and off using the
front panel power switch.
Mode A-2 (Manual On and Off)
(Transceiver Software Version 214 and later)
The current horn alert mode does not change
when power is turned on and o ff by e ither the power or
ignition switch.
Mode B (Automatic Off and On)
(Transceiver Software Version 213 and later)
Ignition Switch
- The horn alert is always of f when t he
ignition switch is turned on, and always turns on when
the ignition switch is turned off (if there i s a power-off
delay programmed).
Power Switch
- The horn alert is always off when the
power switch is turned on.
Option Switch and Menu Mode Control
The HORN option switch or Menu Mode
“HORN/LIGHT” parameter (see Section 3.5.12) can
be used to change the current condition. However, the
automatic operation described in the preceding modes
overrides an on or off condition that may have been
selected by the switch or menu parameter.
Permanently Enabling Horn Alert
The profile programming for the horn alert in the
Menu screen (see next section) is in effect only until
the first time it is manually or automati cally change d.
If neither an option switch or menu parameter is
programmed and the default is set to “disabled”,
operation is as follows:
Mode A1 - If the ignition switch controls power, this
mode cannot be used because the horn alert automatically turns off the first time the ignition switch is
turned on and there is then no way to turn it back on. If
the ignition switch does not control power, the horn
alert is always enabled when transceiver power is on.
Mode A2 - If the horn alert is to be always enabled
when transceiver power is on, this mode could be
used.
Mode B - This mode could be used if the ignition
switch controls power. The horn alert is then always
disabled when the ignition switch is on and enabled
during the turn-off delay. However, if the ignition
switch does not control power, it cannot be used
because the horn alert turns off the first time power is
turned on and there is no way to turn it back on.
3.6.5 PROFILE
When programming the menu described in
Section 3.5, a default setting for most items can also
be selected. This default setting can establish the
power-on profile of the transceiver. For example, the
backlight could be on when power is turned on.
However, i f an item can be chang ed by the user in
the Menu Mode or by an option switch, it returns to
the condition that was last selected by the user. Therefore, the default se tting is fixed only if the paramet er is
not controlled by the M enu Mode or an option switch.
The functions that can be programmed in the profile
are as follows. If a function is not programmable, it
returns to the last selected state or the state it was in
when power was turned off.
Auto-RegistrationPriority
Auxiliary 1 and 2Radio Sounds
Backlight ControlScan List Save
Bank SelectScan Type Select
EncryptionTalk-around
External PAStatus
LTR System SearchView Angle Adjust
3.6.6 BANKS
Banks of systems can be programmed to allow
the transceiver to operate with different radio personalities. For example, one bank could be programmed
for operation in Chicago and another for operation in
St. Louis. Each bank can contain any of the systems
that have been programmed, and they can be
numbered differently. Only the systems in the
currently selected bank can be selected or scanned.
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OPERATION
T o in itiate changing from on e bank t o another, the
BANK option switch or Menu mode “BANK SELCT”
parameter is used. The Select switch is then turned to
move to the desired bank and pressed to select that
bank. The current bank is identified by the unique
identification which temporarily appears in the alphanumeric display when the switch is pressed or the
menu parameter selected. For example, “CHICAGO”
and “ST LOUIS” could be displayed to identify the
banks used for those cities.
Each bank can be programmed so that either the
last selected or home system/group is displayed when
the bank is sele cted o r po wer is turne d on. To have this
feature, transceiver software Version 216 or later and
programming software Version 205 or later are
required. With earlier versions, the last selected
system/group is always displayed.
3.6.7 POWER TURN-OFF DELAY
The transceiver can be programmed so that the
vehicle ignition switch as well as the f ront-panel power
switch controls transceiver power. With transceiver
operating software Version 205 or earlier (see
Appendix A), turn-of f dela ys of Immedia te, 10, 20, 3 0,
60, 120, or 240 minutes or Forever (n o turn o f f) can be
programmed. With Version 206 or later, delays of
Immediate, 10 or 30 minutes, 1, 8, 10, or 12 hours or
Forever can be programmed. The del ay can be canceled
at any time by turning power off using the front-panel
switch or turning the ignition switch back on.
A delay allows featur es such as the horn alert and
call indicator to remain active for the programmed
delay time after the ignition switch is turned off. At the
same time, advantages of ignition switch control can
be utilized such as preventing battery discharge that
may result if the transc eiver is acc identally left on.
3.6.8 EMERGENCY CALLS
Introduction
The general operation of Emergency Calls is
described in Section 5.8.11. The two basic operating
modes of the emergency switch are Manual Transmit
and Automatic Transmit. Multi- Net systems can be
programmed for either type; LTR and conventional
systems can be programmed for the manual type only.
When the Emergency switch is pressed, “EMERGENCY” and the group identification are alternately
displayed (unless the display of this message has been
disabled by programming). The transceiver then looks
at the emergency call information programmed in the
currently selected system (or revert system if system
scanning). If there is no emergen cy inf ormat i on
programmed in that system, it looks at the default
emergency information programmed for that bank. It
then switches to the specified emergency system/
group. Operation from this point is controlled by
Manual/Automatic programming. Operation in those
modes is as follows:
Manual Transmit
Automatic transmissions do not occur in the
manual mode. However, this mode minimizes, as
much as possible, the chance that the system will be
busy when a call is placed. The transceiver locks on
the emergency system/group (other system/groups
cannot be selected), scanning is disabled, and all transmissions occur at acces s prio rity 1 (exce pt on LTR and
conventional systems which do not use access
priority). The only calls received are those occurring
on the emerg ency s yst em/group or “all calls”. Calls on
the selectable, fixed priority, and block ID codes of
that system are not received.
Other mobiles may also join in the conversation,
either by selecting the emergency mode or selecting
that system/group. In this case, all rules of normal
transmission and reception apply. To exit the emergency mode and resume normal transceiver operation
after the emergency call is completed, transceiver
power is turned off and then on again.
The EMER (emergency) option switch is used to
manually or automatically place a high-priority call.
When this swi tch is programmed, it is the switch on
the left side of the display because th at switch is
designed to make it less likely to be pressed accidentally. An external switch , such as a foot-actuated type,
can also be used (see Section 2.4.6).
Automatic Transmit
When the Emergency switch is activated with
Automatic Transmit programmed, system and group
selection and s cannin g a re di sable d and the t ransc eiver
begins automatically transmittin g the Emerge ncy Alert
call. This call is transmitted on the programmed emer-
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OPERATION
gency system/group every 10 seconds using access
priority 1.
When the emergency call is received by the
dispatcher, a warning tone sounds and the mobile's
unique ID and other information is displayed on the
console. The dispatc her the n ac knowledges the call by
transmitti ng an Emergency Answer call. When th is
call is detected by the mobile, it halts automatic transmissions. However, system and group selection and
scanning remain disabled until the emergency call
sequence ends. In addition, any further transmissions
occur at the access priority programmed for the group
selected by the emergency switch.
The emergency call sequence ends and normal
transceiver operation resumes when the dispatcher
transmits an Emergency Termination call or transceiver power is turned off and then on again. If the
push-to-talk switch is pressed before the Emergency
Acknowledge call is received, the Emergency Alert
transmissions continue only until the push-to-talk
switch is released.
3.6.9 PROGRAMMABLE POWER OUTPUT
One of five power output levels can be
programmed for each Multi-Net, LTR, and conventional system. The actual power output at each level is
set in the test mode (see Section 3. 11). F or example,
the power output could be programmed as follows:
If temperature continues to increase at the 2-watt
level to the point where more serious damage could
occur (this should seldom happen), the transmitter is
disabled, a warning ton e sounds, an d “NO POWER” is
displayed. The transmitter remains disabled until
temperature decreases to the first temperature limit.
Power output is then produced at the 2-watt level. The
temperature limits ar e fixed in hardware.
3.6.11 DATA SYSTEM/GROUPS
When digital equipment such as a mobile data
terminal is connecte d to the trans ceiver , the tra nsceiver
can be programmed so that data transmissions occur
on a data system/group. Data transmissions can be
enabled or disabled on each Multi-Net, LTR, and
conventional group by programming.
If the selected system/group is not programmed
for data transmissions, the first data group in the
current system is selected. If there is no data group
programmed in the current system, the bank data
system/group is selected. If there is no data system/
group programmed in the current bank, “NO DAT
GRP” is displayed, an error tone sounds, and the orig inal system/group continues to be displayed. Data
transmissions are initiated by a signal on pin 1 of
Universal Interface connector J601.
The temperature of the power amplifier is monitored by the control logic when transmitting. If a
temperature is detected that could damage the power
amplifier module or other devices, power is automatically cut back to the 2-watt level (no message is
displayed). After sufficient cooling occurs, power
output returns to the full output level. This provides
hysteresis so that power is not cut back again after
only a short transmission.
NOTE: Encryption is not compatible with companding; therefore, those features cannot be used together.
As described in Section 1.5, voice encryption
provides protection from casual eavesdropping and
analog scanners. Each Multi-Net, LTR, or conventional group can be individually programmed by the
system operator for encryption. Then when one of
those groups is selected, encryption is automatically
enabled or disabled.
Encryption can also be m anually enabled or
disabled by the ENCPT option switch or the Menu
Mode “ENCRYPTION” parameter. This allows the
user to override the group encryption programming if
desired. Selecting another system or group causes this
feature to revert to the dealer programmed state for
that group. When encryp tion is en abled on the s elected
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Part No. 001-9750-005
OPERATION
group (by dealer programming or the user), the circle/
triangle symbol shown in Figure 3-3 is displayed.
If the transceiver has Version 206 or earlier software (see Appendix A), encrypti on must be ena bled to
transmit or receive an encrypted call. With Version
207 or later software, the transceiver can be
programmed so that encrypted calls are received even
if encryption is not enabled (encryption must be
enabled only to transmit an encrypted call). To have
this operation, the encryption parameter on the “Main
Radio Parameters” sc reen must be programmed “Yes”.
The outputs which control encryption are J601, pin 15
of the universal interface cable and wire-out 7
(Output A).
3.6.13 PHONE MODE
NOTE: The phone mode is available in transceivers
which have Version 203 or later software (see
Appendix A).
The Phone Mode is selected by the PHONE
option key or the Menu Mode “TELEPHONE” parameter. This mode makes placing telephone calls more
convenient by displaying systems and groups
programmed for RIC telephone calls. It also can be
used to recall and dial prestored telephone numbers.
Only RIC-type calls can be placed using this mode.
When the select switch is turned in the Phone
Mode, Multi-Net and LTR system/groups and conventional systems in the current bank that are programmed
for RIC calls are displ ayed. RIC call s can be pl aced on
conventional systems with this transceiver if the
repeater being accessed is equipped for RIC calls.
Up to ten 29-digit telephone numbers can be
prestored by system operator programming. These
numbers can then be recalled and dialed by the user
without the need for a DTMF microphone. This limits
calls to only the prestored numbers if desired. Calls
can also be placed to other numbers using a DTMF
microphone.
The identification could include, for example, up to
ten digits of the number being dialed or the name of
the person or place being called.
To use the Phone Mode, proceed as follows:
a. Press the PHONE switch or select the TELE-
PHONE menu parameter . This displays the firs t RIC
system/group in the current bank. If none are programmed, “NO RIC” is displayed. The status display indicates “PH” until a system/group is se lected.
b. To scroll through the available telephone system/
groups, turn the Select switch. RIC system/groups
are indicated by the handset symbol in the display.
When the desired sys tem/ group is displaye d, select
it by pressing the Select switch.
c. The alphanumeric display then indicate s “SELECT
NBR”. If you wish to manually dial the telephone
number using a DTMF microphone, momentarily
press the PTT switch to obtain a dial tone and then
dial the number using a DTMF keypad. Proceed to
step g.
d. If you wish to recall a prestored number, rotate the
Select switch to scroll through the programmed
numbers. The unique identification programmed
with each number is indicated in the alphanumeric
display.
e. When the desired number is displayed, select that
number by pressing the Select switch.
f. To transmit the displayed number, momentarily
press the PTT switch to obtain a dial tone and then
momentarily press it again to transmit the number.
g. T o ter minate the call by sendi ng the # charact er and
exit the Phone Mode, pr ess the PHONE swi tch or if
using the Menu Mode, press the MENU switch. The
transceiver then returns to the system/group that was
selected before the Phone Mode was entered.
A unique identification of up to ten characters is
stored with each number. This identification is then
displayed when the number is recalled (the actual telephone number that is transmitted is not displayed).
There is als o a 10-second timer that is active in
the phone mode until the number is transmitted. If no
activity is detected for 10 seconds, the Phone Mode is
automatically exit ed.
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OPERATION
3.6.14 DISPLAY OF SOFTWARE VERSION
When transceiver power is turned on, the transceiver software version number and other information
is briefly displayed as shown in the following illustration. Currently, all Summit transceive rs ar e Tier 3. The
operating software can be updated by Write-On Flash
programming as described in Section 4.6. Refer to
Appendix A for information on the various versions
that have been released.
Freq BandSoftware Version
Number
Tier
3.7 MULTI-NET MODE FEATURES
3.7.1 BUSY QUEUING (MULTI-NET)
Introduction
Busy queuing places the call in a queue if the
system is busy when the PTT switch is pressed. Then,
when the system becomes ava il abl e, t he user is alerted
by a tone and the call can be placed if desired. An
available system is de termined in the normal manner
by the access priority of the selected group and the
current access priority being transmitted by the
repeater (see Section 5.8.2).
access is completed. When the access is successful, a
beep (standard and auxiliary calls) or a dial tone (telephone calls) sounds and the call can then be placed in
the normal manner.
When auto-regis tration is active (se e next secti on)
and the transceiver software is Version 206 or later
(see Section 3.6.14), the queue status is maintained
even if registr at io n on another site occurs. W i th ear lier
versions of software, the queue is suspended if this
occurs.
When the access is successf ully compl eted by the
transceiver as described, the repeater hangtime indicator is set. This holds the repeater for the length of
the hangtime programmed b y the Syst em Management
Module. If no call is made by the user during this
hangtime, the queue mode is exited and the tr ansce iver
returns to normal operation.
Exiting The Queue Mode
When the queue mode is exited, “IN QUEUE” is
no longer displayed. This mode can be exited at any
time by momentarily pressing the PTT switch (except
if responding to a call on another group). It is also
exited if any of the following occur.
• A call is received on the selected group
• Any of the front panel switches are changed or the
PTT switch is pressed while no call is being
received
Busy queuin g is a system parameter, so it is
enabled or disabled on each Multi-Net system. It functions with both standard and special calls on Multi-Net
systems only. The queue mode is entered automatically when the PTT switch is released with the busy
tone sounding. The busy tone then stops sounding and
“IN QUEUE” is displayed in the alphanumeric
display.
When the system becomes available, the trans ceiver waits a random time and accesses the repeater.
This random delay minimizes the chance of collisions
with other mobiles in queue. If an access attempt is
unsuccessful, another access is attempted after a
random time delay. This continues until a successful
• A Reassign Select command is received
Receiving Calls In The Queue Mode
While in the queue mode, calls are received
normally. In addition, if group scanning is
programmed on the selected system, calls are rece ived
on the other selectable groups. However, since system
scanning is temporaril y disabled , calls are not receiv ed
on other programmed systems. If a call is received
while in queue, the user can respond to the call in the
usual manner and then normal queuing of a call
resumes shortly a ft er the call is finished. The length of
the delay before queuing resumes is set by the receive
scan delay timer.
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OPERATION
3.7.2 AUTO-REGISTRATION (MULTI-NET)
Introduction
Auto-registration is also described briefly in
Section 5.8.12. This feature permits telephone and
unique ID calls to be automatically routed to the site in
which a mobile is operat ing. Standard calls can also be
routed if the Site Tracking Module (STM) in the RNT
is configured appropriately. To utilize auto-registration, it must be enabled by system operator programming and system scanning must be enabled by the
SCAN switch. In addition, it must be enabled by the
Menu Mode “MN AUTOREG” parameter if it can be
selected.
Auto-registration effectively controls the revert
(selected) system when scanning (refer to Section
3.4.4). Therefore, auto-registration can be used with
the “Last Selected” and “Temporary” modes but not
“Last Received”.
Upon entering the scan mode or if the s ignal from
the currently registered site is weak , the transce iver
begins checking all programmed status channels to
locate one with suitable signal strength. When one is
located, a registration message is sent to the repeater.
The repeater then forwa rds the information to the
RNT. The location of the mobile is then known and
when a call to that mobile is placed, it is automaticall y
routed to the correct site.
When the mobile is searching for a site on which
to register, “AUTO REG” and the scan message are
alternately displayed. If a user wants to maintain
communication on a site regardless of signal strength,
auto-registration or scanning can be turned off. This
permits communication with a group in marginal
signal conditions.
Revert System/Group After Registration
After registration occurs, “AUTO REG” is no
longer displayed and the revert system is the next
higher system with a different site number that could
be accessed (wrap-around occurs after the highest
system is checked). For example, if System 3 was
selected and System 5 is the next system with a
different site number, that system becom es the revert
system if it can be accessed.
Revert group selection is determined by the
programming of the bank “Wide Area Group
Tracking” parameter. If this parame ter is programmed
“Yes”, the revert group does not change (it is t he same
as it was before registration on the new site occurred).
If this parameter is “No”, the revert grou p is the group
that was displayed when that sys tem was la st sel ect ed.
Refer to Section 4.4.6 for more information on proper
wide area group tracking programming.
NOTE: The preceding “Wide Area Group Tracking”
parameter is available only if the transceiver has software Version 206 or later (see Appendix A). With earlier versions, the “No” condition is always selected.
Scanning With Auto-Registrati on
Auto-registration functions with both single- and
multiple-site scan (see Section 3.4.2) and scanning
continues in the normal manner. However, if LTR or
conventional systems are scanned in addition to MultiNet systems, registration occurs only on Multi-Net
systems.
Scan Dropout Criteria
The point at which registration on another site
occurs is controlled by the percentage of good data
messages that must be received over a 10-second
period to stay on the current site. With this transceiver,
this percentage can be programmed for 50-100% on
each Multi-Net site. The default is 75% (33 good
messages out of 44). The higher the percentage, the
sooner auto-registration occurs.
Wide Area Coverage Enhancements
With software Version 206 or later, the following
enhancements have been made to provide better wide
area coverage. The pr ogramming of the bank “Wide
Area Group Tracking” parameter does not affect these
features. (That parameter controls only the revert
group that is selected after registration occurs.)
• The transceiver registers on a site even when not
actively scanning (such as when the microphone is
off-hook). Other requirements are that the singlesite type of scanni ng mu st be selec ted a nd scan ning
must be enabled by the Scan switch.
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OPERATION
• The transceiver can exit a site while re ceiving a call,
register on a new site, and then continue receiving
the call on the new site.
• A call can be received on a new site before
registration occurs.
3.7.3 TRANSMITTING STATUS INFORMATION
(MULTI-NET)
Status messages can be transmitted whenever the
PTT switch is pressed with a Multi-Net system
selected. The Menu Mode “ STATUS” parameter or the
STAT option switch is used to display or change the
current status condition that is transmitted (see Section
3.5.22). When the status select mode is enabled using
either of these methods, the current status condition is
momentarily indicated in the alphanumeric display.
The Select switch is then rotated to cycle through the
available choices and pressed to select the desired
choice.
For example, status conditions such as “AT
SITE”, “LEVNG SITE”, or “UNLOADING” can be
programmed. The status condi tion is th en displaye d on
the dispatcher's console along with the mobile's ID
number whenever the transmitter is keyed. The transmission of status messages is also described briefly in
Section 5.8.14.
Auxiliary - These calls allow a mobile to communicate with any individual mobile or a group of mobiles
at the same site or another Multi-Ne t site (when
several Multi-Net systems form a network). Calls to
specific mobiles are called Unique ID calls, and calls
to groups are called Directed Group calls. Directed
Group calls allow communication with groups tha t are
otherwise not accessible because no selectable system
has been programmed with the home repeat er or group
ID of those mobiles. Directe d Group calls can be made
to any home repeater on any group ID from 1-225.
Transceiver Programming For Special Calls
To originate a special call, the transceiver must
have one of its selecta ble gro up posit ions pr ogrammed
for the special call being made (Interconnect or Auxiliary) as shown in the following chart. ID code 236
programs Auxiliary calls and ID code 237 programs
Interconnect calls. This chart also shows which ID
must be programmed to hear a response or receive a
special call. These IDs may be fixed or selectable as
described in Section 3.3.4.
Originating MobileReceiving Mobile
Type of CallEncode IDDecode ID
InterconnectInterconnect Interconnect
Auxiliary
Unique IDAuxiliaryAuxiliary
Dir GroupAuxiliaryGroup ID
3.7.4 SPECIAL CALLS (MULTI-NET)
Introduction
Special calls use the special call group ID codes
from 226-254 as described in Section 5.7. The special
calls usually originated by a mobile are Interconnect
and Auxiliary calls. Most other special calls such as
Interrogate, Mobile Disable, and Reassignment are
originated by the system operator o r a dispatcher. The
mobile-originate calls are described in the following
information and the oth er sp ecia l call s are d esc ribed in
Section 5.
Mobile-Originate Special Calls
Interconnect - These are telephone calls to or from a
mobile made through the Public Switched Telephone
Network (PSTN).
NOTE: Auxiliary Calls = ID Code 236; Interconnect
(Telephone) Calls = ID Code 237
NOTE: Even if ID codes 236 and 237 are selectable
codes, they are treated like fixed codes when calls are
received. Therefore, calls on those codes are received
regardless of which group is selected or group scan
programming (as long as the system is selected or
scanned). Refer to Section 3.3.4 for more information.
It can be seen from the chart that with special
Directed Group calls, the auxiliary ID is enco ded to
place the call, and t he sp ecif ied gr oup ID is dec oded to
receive the cal l. Thi s is b ecause the c all i s con ver ted t o
a standard group call by the RNT. In addition, when a
landside call is made to a specific mobile, it is always
classified as an interconnect call even though the
unique ID of the mobile may be specified (refer to
“Landside-Originate Special Calls” which follows).
Revised February 1997
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Part No. 001-9750-005
OPERATION
Special Call Authorization
When a mobile is programmed to make Interconnect calls, system authorization is needed before
service is ava ilable. Thi s author ization is perf ormed by
the system operator using the System Management
Module of the RNT. This authorization also determines what type of service is available. For example, a
mobile may be authorized to dial local numbers only.
This authorization is keyed to the mobile's unique ID
which is transmitted wh en any call is made.
With all Auxiliary calls, no special authorization
is required. All that is needed is proper programming
of the mobiles originating and receiving the call.
Therefore, a Unique ID c all can be ma de to any mobi le
in the same site or some other site that is programmed
for Auxiliary calls. The same applies to Directed
Group calls except that the mobile receiving the call
does not need to be programmed for Auxiliary calls,
just the standard group ID being transmitted.
Placing a Special Call
The procedure for placing a special call is as
follows.
a. Select the group programmed for Interconnect or
Auxiliary calls, whi c hever is to be made.
Directed Group Call (Current Site)
2-digit home repeater number +
3-digit group ID
Directed Group Call (Directed Site)
3-digit site number +
2-digit home repeater number +
3-digit group ID
e. Release the PTT switch if it was pressed to dial the
number. A beep should then sound which indicates
that the number was accepted b y the sy ste m . If th is
beep does not sound, an unauthorized number may
have been dialed or a dial ing mistake may have been
made.
f. Interconnect Call - The normal landsid e ringing or
busy tone is then heard. After the party answers,
press the PTT switch and respond.
Unique ID Call - A “ringing” tone is heard which
indicates that the mob ile is being r ung. If there is no
answer , t he ringing stops after several rings and the
call is automat ically terminated by t he system. When
the party answers, press the P TT switch and respond.
Directed Group Call - A second beep sounds
which indic ates that the p ath to the mobile is
complete and speaking ca n begin (n o ringi ng of the
other mobile occurs).
b. Momentarily press t he PTT switch until the pr oceed
tone sounds. A dial tone should be returned.
c. If an Interconnect call is being made, dial the tele-
phone number of the landside party you are calling.
d. If an Auxiliary call is be ing made, dia l the 4- 8 digit
number which specifies the destination of the call.
The digits dialed for e ach type of call are as follows :
Unique ID Call (Current Site)
4-digit unique ID of mobile/dispatcher
Unique ID Call (Directed Site)
3-digit site ID +
4-digit unique ID of mobile/dispatcher
NOTE: It is not possible to talk and listen at the
same time because this transcei ver operat es hal fduplex.
g. When the call is finished, terminate it by pressing
the # key . Three rapid beeps indi cate that the call has
been terminated.
Receiving Special Calls
When an Interconnect or Unique ID call is
received, “ringing ” is heard from the speaker . The call is
then answered in the no rmal manne r. If it is a Directed
Group call, only the voice of the calling party is heard
because no ringing occ urs. The originating party usually
terminates the call when it is finished . If the thr ee beeps
which indicate that the call has terminated are not heard,
press the # key to terminate the call.
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OPERATION
Landside-Originate Special Calls
Calls can be also be made from any landside telephone to specific mobiles (Interconnect calls) or
groups (Directed Group calls). Calls can also be
placed to other sites in a manner similar to when they
are mobile dialed.
If the system has DID lines, the landside caller
can dial a mobile directly because each mobile that
can receive these calls is given its own phone number.
If the system has standard trunk lines, the telephone
number of the system is dialed. Then when the system
answers, a short tone sounds to indicate that the digits
specifying the destination of the call should be dialed.
The same digits are dialed as when the call is mobile
originated as described in “Placing a Special Call”.
The landside telephone must generate DTMF tones to
dial these digits.
After these digits are dialed, a beep is heard
which indicates that the number was accepted by the
system. Ringing then i ndicat es th at th e mobile is b ein g
rung unless it is a Directed Group call. With those
calls, no ringing of the mobile occu rs and anoth er beep
is heard which indicates the path is complete and
speaking should begin.
After the mobile answers, the landside party
should respond in the normal manner. Remember that
the mobile is operati ng half dup lex and cannot hear the
landside party while transmitting. When the call is
finished, it should be te rminated by one of the parties
by pressing the # key. Three beeps indicate that the
call has terminated.
3.7.5 TRANSMIT INHIBIT
This feature prevents the transmitter from keying
if the party being called is busy with another call. To
enable this feature, the transceive r is programmed with
a block of transmit inhibit ID codes tha t can incl ude up
to all 225 standard I D codes with Multi-Net operation,
or up to all 250 ID codes with LTR operation. If a code
within this block has been detected up to 5 seconds
before the PTT switch is pressed, the transmitter does
not key, the intercept tone sounds, and “TX INHIBIT”
is indicated in the alphanumeric display.
To make another call attem pt, the PTT switch
must be released and then pressed again. However, it
is a good idea to wait a few seconds because the 5second timer does not count down while the PTT
switch is pressed. It is not poss ible to complete the call
by keeping the PTT switch pressed with the intercept
tone sounding.
One use of this feature is to prevent the accidental
interruption of a call in progress. This could happen
when the other transmitting party unkeys or if an ID
code with a higher priority is transmitted. Another use
of this feature could be to provide an audible indication that the party being called is busy. This feature is
available only on Multi-Net and LTR systems. A
similar Transmit Disable On Busy feature is availabl e
on conventional systems.
3.7.6 ACCESS PRIORITY (MULTI-NET)
Refer to Section 5.8.2.
3.7.7 CAMP-ON PREVENT
This feature prevents a user from “camping on” a
channel by continuously pressing the PTT switch
while a message is being received. When the CampOn Prevent feature is progr ammed and the user press es
the PTT switch while a message is being received , the
transmitte r is disable d, “TX DIS BS Y” is displayed,
and the dial tone sounds until the PTT switch is
released. Therefor e, acce sses can be a ttempted only by
pressing the PTT switch during quiet times.
This feature is available only when placing MultiNet standard (mobile-to-mobile) calls. In addition, the
selected encode ID must be the same as the ID on
which the call is being received. It is not available
with Multi-Net special calls or any type of LTR or
conventional call. In addition, transceiver software,
Version 223 or later and programming software,
Version 207 or later, must are required.
When this feature is not used and the P TT switch is
pressed while a messa ge is being receive d, the message
continues to be received normally and access is automatically attempted as soon as the message is complete.
If a large number of mobiles do this during busy p eriods,
collisions may occur and the “camping” mobiles may
have a better chance getting a free channel.
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OPERATION
3.8 LTR MODE FEATURES
3.8.1 FREE SYSTEM RINGBACK
If a busy condition exists when making an LTR
telephone call, the Free System Ringback feat ure automatically signals when th e sys tem is no lo nger busy. If
the busy tone sounds and “SYSTEM BSY” is
displayed when the PTT switch is pressed, this feature
is automatically selected when the PTT switch is
released. A confirmation tone then sounds and
“RINGBACK” is indicated in the alphanumeric
display.
When a RIC-equipped repeater becomes available, a ringing tone sounds followed by a dial tone
when the handshake is completed. The call should
then go through if it is tried again. This mode can be
canceled at any time by activating any user control. If
scanning is enabl ed, i t continues in the normal manner
when the Free System Ringback mode is exited. No
special programmi ng is requi red to ena ble thi s featu re,
and it functions on LTR telephone calls only. RICequipped repeaters must be specified as described in
Section 4.4.5 for proper operation of this feature.
3.8.2 SYSTEM SEARCH
and a dial tone sounds. If the number is not dialed
within a few seconds, normal operation resumes. This
mode can be canceled at any time by activating any
user control.
3.8.3 TRANSPOND
Each of the selectable ID codes of an LTR system
can be programmed for transpond. This feature allows
the person making a call to determine if the mobile
being called is in service. If a call is received on an ID
code programmed for transpond, the transceiver waits
until the originating transceiver unkeys. It then automatically transmits two data mes sages wi th the second
containing the turn-off code. This causes the transceiver originating the call to briefly unsquelch. If the
originating transceiver has a call indicator, it will also
turn on if the ID code has been programmed for a call
indicator. Transpond is not avai lable on the fixed
priority and block IDs.
3.8.4 TRANSMIT INHIBIT
The LTR Transmit Inhibit feature operates the
same as the Multi-Net Transmit Inhibit feature
described in Section 3.7.5.
If an out-of-range condition exists when
attempting an LTR telephone call, this feature automatically searches for a system within range. The
system search feature is available only with LTR telephone calls and only if it has been enabled by dealer
programming or the user w ith the Menu mode “LTR
SYSTEM SEARCH” parameter (see Section 3.5.13).
If this feature is enabled and the intercept tone so unds
when the PTT switch is pressed, it is automatically
selected when the PTT switch is released. A confirmation tone sounds and “SYS SEARCH” is indicated in
the display.
The transceiver then attempts to access, in
succession, other systems that have a RIC ID
programmed in any group position. As each system is
searched, a beep sounds. Each system is accessed only
once. If no system could be accessed, the intercept
tone sounds, “NO RIC FND” is displayed, the feature
deactivates, and the system/group does not change. If a
system is accessed, the new system/group is selected
3.9 CONVENTIONAL MODE FEATURES
3.9.1 TRANSMIT DISABLE ON BUSY
This feature di sables t he trans mitte r if th e chan nel
is busy (carrier present) when the PTT switch is
pressed. W hen the trans mitter is disabled by this
feature, the busy tone sounds and “TX DIS BSY” is
indicated in th e alphanumer ic disp lay. It is not possible
to access a channel by holding down the PTT switch
until the channel is no longer busy. If this feature is
disabled, the transmit ter can be keyed even if the
channel is busy.
This feature can be enabled or disabled on each
conventional group by dealer programming. Some
repeaters may have delayed drop-out (hang time)
which would cause this feature to disable the transmitter even if no busy condition exists. To key the
transmitter in this situat ion, re lease t he PTT switch and
press it again within 1 second.
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OPERATION
3.9.2 CALL GUARD SQUELCH
Tone (CTCSS), digital, or inverted digital Call
Guard squelch can be programmed on each conventional transmit and receive group in any order desired.
A tone Call Guard reverse burst and dig ital Call Guar d
turn-off code can al so be programmed to eliminate the
squelch tail (noise burst) in the receiving transceiver
when the P TT s witch is rele ased. The r everse bur st and
turn-off code are always detected by this transceiver
on receive groups programmed with Call Guard
squelch.
The Call Guard squelch feature eliminates
distracting messages intended for others using the
channel. This is done by using a subaudible tone or
digital code to contr ol t he sque lch. Thi s ton e o r code is
unique to an individual user or user group on that
channel. This tone or co de is transmitted with th e
voice signal, but is not heard because it is in the
subaudible range and is attenuated by a filter. Call
Guard squelch must be used in both the transmitting
and receiving transceiver to be functional.
Tone-type Call Guard squelch utilizes subaudible
tones from 67-250.3 Hz. Although there are 38 tones
assigned, the top five are n ormally not us ed bec ause of
their close proximity to the voice band which starts at
300 Hz. A reverse burst can be transmitted when the
push-to-talk swit ch is releas ed to eliminat e the squelch
tail (noise burst) in the receiving transceiver. The
reverse burst is a 180-degree phase reversal for a
length of time determined by the tone frequency.
Digital Call Guard sque lch uses digital data
instead of subaudi ble tones to cont rol the squelch. This
data consists of co ntinuous r epetitions o f 23-bit wor ds.
No bit or word synchronization information is used.
When the push-to-talk switch is released, a turn-off
code can be transmitted. This eliminates the squelch
tail similar to the reverse burst with tone-type Call
Guard squelch.
Although there are thousands of possible code
combinations with 23 bits, only 83 are unique with the
data scheme used. The number specified when the
code is programmed is a ctually a seed for a special
algorithm used to generate the 23-bit data word. The
data is transmitted at a rate of 134.4 bits per second.
Therefore, approximately six words are transmitted
each second. When the da ta is deco ded, 23-bit samples
are taken and then the bit s ar e r o ta te d to determine if a
valid code was received.
Digital Call Guard squelch c an be programmed as
normal or inverted. The only difference is that the
wave-form is inverted when “IDCG” is selected. The
inverted type may need t o be prog rammed if the si gnal
is inverted by the repeater or another transceiver. If
standard noninverted digital Call Guard squelch does
not function, try changing to the other type.
3.9.3 MONITOR MODE
The monitor mode allows all activity on a
channel to be monitored when Call Guard squelch or
other types of decoders ar e used to cont rol the squ elch.
The monitor mode disables these features so that all
messages on the channel are heard. To select the
monitor mode, take the microphone off-hook or press
the MON option switch if available. The monitor
mode is indicated by “MON” in the display.
If off-hook detection has been disabled by
programming, the MON switch must always be used
to select the moni tor mode or the Transmit Di sab le On
Busy feature should be programmed. If scanning is
occurring, the MON switch is not detected and monitoring is enabled only by taking the microphone offhook if the selected (revert) system is a conventional
system (and off-hook detection has not been disabled).
Call Guard squelch can al so be disabled on the
selected system/gr oup by the Call Guard option switch
if available (see Section 3.5.7). This switch disables
both transmit and receive Call Guard signaling, while
the monitor mode disables only receive Call Guard
signaling.
3.9.4 REPEATER TALK-AROUND
Normally , al l transmis sions go thr ough a repeater.
However, there may be times when the user is out of
range of the repeater system and is unable to talk to
anyone even though the mobile being called is a short
distance away. In this situation, the repeater talkaround feature can be used to transmit on the receive
frequency so that transmissions do not have to go
through a repeater. Any conventional group can be
programmed for talk-around (unless it has been
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OPERATION
disabled at the system level). Talk-around is then
enabled by simply selecting one of those groups. The
unique identification c an be used to i dentify which
groups are programmed with this feature.
If talk-around has not been disabled on the
system by system operator programming, the Menu
Mode “TALKAROUND” parameter or the TA option
switch (see Section 3.5) can be used to turn talkaround on and off. In the Menu mode, talk-around is
enabled when “ON” is indicated in the status display.
With an op tion swi tch, a t rian gle is i ndica ted unde r t he
switch if it is ena bl ed by the switch or programmed on
the selected system/group. If the switch is pressed with
talk-around disabled, “NO TALK” is displayed.
Changing the selected system or group causes the
programmed default talk-around condition to be
selected.
3.9.5 PRIORITY GROUP SAMPLING
Priority group s am pl in g ensures that messages on
conventional priority groups are not missed while
listening to messages on other conventional groups.
Both a first and second priority group can be designated in each bank by system operator programming.
When a message is received on a priority 1 group,
“P1” is indicated in the status display, and when a
message is received on a priority 2 group, “P2” is
indicated.
Priority group sa mpling o ccurs o nly when syst em
scanning is enabled. In addition, it must be the
“Multiple-Site” type as describ ed in Section 3.4. 2. The
first priori ty system/gr oup is sampl ed while listening
to a message on the second priority group but not vice
versa. The transceiver can be programmed so that the
first priority group is sampled every 0.5, 1, or 2
seconds or not at all if “Di sable d” is pro grammed. The
second priority group is always sampled every 2
seconds. When a first prior ity system/gro up is sampled
while listening to a message on some other system/
group, a series of “ticks” are heard. These ticks are
brief interruptions of the audio signal that occur when
sampling takes place.
This feature is available only on conventional
systems. In addition, sampling does not occur while
listening to a Multi-Net o r LTR call or when tr ansmitting any type of call. Call Guard squelch is not
detected on the first priority group but is detected on
the second priority group if is programmed. If the PRI
option switch or the Menu mode “PRIORITY” parameter is available (see Secti on 3. 5.17), pr iori ty sampl ing
can be turned on and off.
3.9.6 RECEIVE-ONLY GROUPS
Conventional groups can be programmed so that
transmitting is disabled (monitor only). This is done
using the TX DIS parame ter on t he group sc reen. If the
PTT switch is pressed with one of these groups
selected, the intercept tone sounds and “TX
DISABLE” is displayed.
3.10 MISCELLANEOUS
3.10.1 SUPERVISORY TONES
There are supervisory tones that are heard at
various times when operating the tr ans cei ver. Some or
all of these tones can be enabled and disabled by
system operator programming or by the user if the
Menu Mode “RADIO SNDS” parameter is enabled
(see Section 3.5.18). These tones are as follows and
they are heard in only the Multi-Net and LTR modes
unless stated otherwise.
Busy Tone - This tone is similar to the standard telephone busy tone, and it indicates that the radio system
is currently busy. It consists of combined 480 Hz and
620 Hz tones swit ched on and off at approximately a 2
Hz rate. It sounds with all types of Multi -Net and LTR
calls and also when the Multi-Net Busy Queuing
feature is used. “SYSTEM BSY” is also displayed
when this tone sounds.
Intercept Tone - This is a siren- like to ne consis ti ng of
700 Hz and 900 Hz tones alternating at approximately
a 2 Hz rate. This tone indicates the following out-ofrange or other error conditions:
• When this tone sounds 2-3 sec onds after pressing the
P TT switc h and “OUT-OF-RNG” is also displ ayed,
the data handshake with the repeater could not be
completed. The usua l cause of thi s is an out of r adio
range condition. Twelve attempts are made on
Multi-Net systems and six access attempts are made
on LTR systems before this tone sounds. No more
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OPERATION
access attempts are th en made until the push-to-talk
switch is released and then pressed again.
• If this tone sounds after the transmitter has been
keyed for an extend ed time and the tr ansmitter turn s
off and “TX TIMEOUT” is displayed, the transmitter has been disabl ed by the Time-Out Timer
feature (see Section 3.6.1).
• If this tone sounds as soon as the push-to-talk switc h
is pressed with a conven tiona l chann el se lec ted an d
“TX DIS BSY” is displ ayed, the channel i s busy and
the transmitte r was disabled by t he Trans mit Disable
On Busy feature (see Section 3.9.1). If “TX
DISABLE” is displayed inst ead, a conventional
receive-only chan nel is selected (see Sect ion 3.9.6).
• If the push-to-talk sw itch is presse d while r eceiving
an LTR call, this tone sound s and “TX DIS BSY” is
displayed.
Proceed (Clear-To-Talk) Tone - Th is is a 20 milli second burst of the 700 Hz tone whic h sounds after the
push-to-talk swit ch is pressed to indicat e wh en ta lking
can begin (see Section 3.6.3).
Key Press Tone - This is a 30 millisecond burst of the
700 Hz tone that sounds to indicate when a key or the
Select switch is pressed or turned.
MULTI-NET SPECIAL CALL TONES
NOTE: The following tones are produced by the MultiNet RNT and are heard only when placing special
calls.
Confirmation Tone - A short tone which sounds
when the number dialed is accepted by the system.
Call Proceed Tone - With Multi-Net Directed Group
calls, ringing do es not occur after t he number is diale d.
Instead, this short tone sounds after the confirmation
tone to indicate that the audio path is complete and
speaking can begin.
End Call Tone - Three beeps which sound when the
end of the call has been detected by the system.
Proceed Dialing Tone - When placing a landsideoriginate call to a mobile, the caller may dial the
number of the system and then when the system
answers, a number specifying th e mo bil e bei ng ca ll ed.
This tone sounds to indicate when the number of the
mobile should be entered.
LTR TELEPHONE CALL TONES
NOTE: The following tones are produced by the LTR
RIC interconnect equipment and are heard only when
placing LTR telephone calls.
Reorder Tone - Three beeps which indicate that the
call has bee n terminated by the syst em.
Return Time W arn ing Tone - Two beeps which warn
that you have not transmitted for an extended period.
If you do not transmit within 5 seconds, the call is
automatically terminated by the system. The time
between transmissions is one of the parameters used
by the system to detect the end of a call when the #
character is not sent.
Conversation Time-Out Tone - Calls are limited to a
certain length by the system. Thirty seconds before
this time is reached, a “tick” begins sounding each
second. When the 30-second time expires, the call is
automatically terminated by the system.
Turn-Around Tone - This is a single beep which may
be used to indicate to the landside party when to
respond to your transm ission. It sounds when you
release the PTT switch, and you may partially hear this
tone.
Proceed Tone - This tone consists of two beeps and it
tells the landside caller when to enter the five-digit
number specifying the mobile being called. Dialing of
this number must be started within 5 seconds of
hearing this tone, and a tone-type telephone must be
used.
3.10.2 DISPLAY MESSAGES
The following messages may appear in the tencharacter alphanumeric display.
ALL CALL - Indicates that the Multi-Net “All Call”
special call is being received. This is a high priority
call to all mobiles assigned to a site. If another call is
being received, it is dropped to receive this call.
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Part No. 001-9750-005
OPERATION
AUTO REG - Indicates that the transcei ver is
attempting to regist er on another system. Refer to
“Auto-Registration” description on Section 3.7.2.
BLOCK CALL - Indicates that the call is being
received on a Multi- Net or LTR block ID code (refer
to Section 3.3.4).
CLONING - Indicates that one transceiver is
programming another using the cloning feature
described in Section 4.5.
EMERGENCY - Indicates that the emer ge ncy switch
has been pressed (r efer to Section 3.6.8).
GPSCN DSBL - Indicates that an attempt was made
to delete a group from the scan list with group scanning disabled.
HI BATTERY - The transceiver senses the battery
voltage and if it rises to a point where transceiver
damage may result (above 18.5 VDC), the intercept
tone sounds and this message is displayed.
NO TALK - Indicates that talk-around has been
disabled on the selected conventional system by
programming (refer to Section 3.9.4).
NOT MULTI - Indicates that an attempt was made to
enable a Multi-Net feature on an LTR or conventional
system.
NOT ON CONV - Indicates that an atte mpt was made
to enable a conventional mode feature on a Multi-Net
or LTR system.
OUT-OF-LOK - Indicates that the synthesizer is
unlocked. The transceiver is nonfunctional until lock
is re-established. Troubleshoot the synthesizer if this
indication persists for an extended period.
NO ACCESS - Indicates the inability to access the
system, perhaps because of an out-of-range condition.
Once this indication appears, no more access attempts
are made until the PTT switch is released and then
pressed again.
IN QUEUE - Indicates t hat the call has been placed in
a queue by the Multi-Net Busy Queuing feature (refer
to Section 3.7.1).
MIC TO PA - Indicates that the microphone audio is
being routed to the public address system (refer to
Section 3.5.10).
MULTI-SCAN - Indicates that multiple-site scanning
is occurring (refer to Section 3.4.2).
NO DAT GRP - Indicates that no valid data group
could be found for the data transmission (refer to
Section 3.6.11).
NO NUMBERS - Indicates that the Phone Mode is
selected and no telephone numbers have been preprogrammed (refer to Section 3.6.13).
NO POWER - Indicates that the transmitter temperature is excessive and the transmitter h as been shut
down (refer to Section 3.6.10).
NO RIC FND - Indicates that no RIC system/groups
could be found in the Phone Mode (refer to Section
3.6.13).
PRIORITY 1 OR 2 - Indicates that a Multi-Net or
LTR call is being received on one of the fixed priority
ID codes (refer to Section 3.3.4).
PROG ERROR - Indicates an EEPROM read error.
Check the transceiver programming or EEPROM if
this indication persists.
PROG MODE - Indicates that the trans ceive r is being
programmed.
RCV AUD P A - Indicates that the r eceive audi o signal
is being routed to the public address system (refer to
Section 3.5.10).
REM ERROR - Indicates that a non-Summit or early
control unit is being used (see Appendix A.A.5).
RING BACK - Indicates that the LTR Free System
Ringback mode has been entered (refer to Section
3.8.1).
SELECT NBR - Displayed in the Phone Mode to
indicate that a preprogrammed telephone number
should be selected or the number should be dialed
manually (refer to Section 3.6.13).
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OPERATION
SNGLE SCAN - Indicates that the single-site type of
scanning is occurring (refer to Section 3.4.2.
SUMMIT 8 or 9 V 2xx X - This message is displayed
for an instant when transceiver power is turned on.
“SUMMIT” is the model of the transceiver, “8” indicates an 800 MHz mode, and “9” indicates a 900 MHz
model. The number after “V” indicates the version of
software being used by the transceiver, and the last
digit indicates the tier level of the transceiver (refer to
Section 3.6.14).
SYS SEARCH - Indicates that the LTR System
Search mode has been entered (refer to Section
3.5.13).
SYSTEM BSY - Indicates that the radio system is
currently busy.
TYPE ERROR - Indicates that an attempt was made
to clone two different types of transceivers.
TX DISABLE - Indicates that the selec ted conventional system is programmed for monitoring only
(refer to Section 3.9.6).
TX DIS BSY - Indicates that the transmitter has been
disabled by the conventional Transmit Disable On
Busy feature (refer to Section 3.9.1). This also indicates that the transmitter has been keyed while
receiving an LTR call.
The various test functions are selected by
pressing or rotating the front panel Select switch. The
display indicates the mode that is c urrently selected
and also such things as the selected frequency, power
level, or operating mode. While in the test mode, the
front panel option switches function as follows:
Center Switch
described in the next section.
Left Switch
monitoring on and off.
All Other Option Switches
angle.
The eight test functi ons that ca n be selecte d are as
follows. These functions are described in more detail
in the Secti ons 3.11.2 - 3.11.9.
- Selects the test channel bank as
- The switch to the left of the display turns
- Adjust the display viewi ng
• Receive-Transmit-RSSI
• Power Level 1 Set (Std band)
• Power Level 1 Set (T/A band)
• Power Levels 2, 3, 4, 2W Set
• Balance Adjust
• Transmit Hum and Noise
• DC Voltage Check
• Display Test
NOTE: The alignment procedure in Section 8
describes how these test functions are used to make
transceiver adjustments.
TX INHIBIT - Indicates th at the transmitter has been
disabled by the LTR/Multi-Net Transmit Inhibit
feature (refer to Section 3.7.5).
TX TIMEOUT - Indicates that the transmitter has
been disabled by the Time-Out Timer (refer to Section
3.6.1).
3.11 TEST MODE
3.11.1 INTRODUCTION
This transceiver has a test mode that is used to
perform testing and al ignment. This mode is enabled
by turning transceiver power on with the RxD and
TxD lines of the microphone connector shor te d
together (P2, pins 10 and 13). When the test mode is
entered, the disp lay in dicat es “RX-TX- RSSI” which i s
the first test function.
3.11.2 RECEIVE-TRANSMIT-RSSI
The RX-TX-RSSI function is used to align the
transmitter and receiver and set the RSSI detect level.
This is the only test function in which both the microphone audio and transmit dat a signals are enable d. The
data signal generated is the 151.4 Hz tone Call Guard
frequency. The receiver squelch is controlled by noise
only.
If the transceiver has Version 207 or later software (see Appendix A), a total of 18 test channels,
arranged as three banks of six channels each, can be
selected (see list on next page). With earlier software,
only the channels in Bank 0 can be selected. The test
channels are fixed and cannot be reprogrammed using
the programming software.
[TA] = Talk-around channels (transmit frequency is
the same as the receive frequency).
The test channel block should be selected while
one of the eight test functions listed above is
displayed. This is done by pressing the center option
switch above the display. The selected block (0, 1, 2)
is indicated by the right-most character of the display.
The desired test frequency is then selected by
pressing the Select switch with “RX-TX-RSSI” in the
display and then turning the switch. The display indicates the channel that is selected. Talk-around channels are indicated by “TA” after the channel number.
To return to the function select mode, press the Select
switch.
The state of the RSSI detect line (U412, pin 7) is
indicated in the display immediately to the right of the
[TA] = Talk-around channels (transmit frequency is
the same as the receive frequency).
channel number. When a carrier is being detected, HI
is indicated, and when no carrie r is being dete cted, LO
is indicated.
3.11.3 POWER LEVEL 1 SET (STD BAND)
The PWR SET function is used to set the maximum
power output level for the standard (non talk-around)
band. Two different power levels are set. PWR SET 1
sets the power output for the low end of the band
(channel 1) and PWR SET 2 se ts it for the high end of
the band (channel 918 or 479). These settings allow
the microprocessor to maintain arelatively constant
power output over t he ent ire o perat ing ban d. When the
system power level is programmed ( see Sectio n 4.3.5),
this is the power level selected by Level 1.
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Part No. 001-9750-005
OPERATION
Microphone audio, data, and the receiver are all
disabled by this f unction. Power is adjusted by rotatin g
the Select switch with the PTT switch pressed. The
display indicates the re lative se t point from 0-12 7 (127
is maximum power).
To exit this mode, the power setting of bot h PWR
SET 1 and PWR SET 2 must be checked by pressing
the PTT switch. The settings are saved in memory
when the mode is exited. The triangle /circle (encryption) symbol indica tes if the current setting has been
checked. The maximum power output t hat can b e set is
the rated power for the model of transceiver and the
type of channel (standard or talk-around). Refer to
Section 8 for more information.
3.11.4 POWER LEVEL 1 SET (TALK-AROUND
BAND)
The TA PWR SET function is used to set the
maximum power output for talk-around band. The
procedure is the same as for standard channels
described in Section 3.11.3 except that talk-around
channels on each end of the band are selected.
3.11.5 POWER LEVELS 2, 3, 4, 2W
The PWR LEVELS function is used to set power
levels 2, 3, 4, and 2W that can be selected for each
system when programming the transceiver. These
power levels apply to both standard and talk-around
channels. Power level 1 is set by the PWR SET and
TA PWR SET functions described in the preceding
and following sections . When t his func tion i s sele cted,
the data and microphone audio signals are disabled,
and only channel 381 (800 MHz) or 240 (90 0 MHz) is
selected.
(see Section 8). The 2W setting can also be in this
range or 1-2 watts.
3.11.6 MODULATION BALANCE
The BAL ADJUST function is used to set modulation balance o ver the entire standard and talk-around
frequency bands. This allows the microprocessor to
compensate for any changes that occur across the
band. This function generates a 67 Hz square wave
that is applied to the modulation circuitry. The microphone audio signal and receiver are disabled.
To enable the balance adjust function, press the
Select switch when BAL ADJUST is displayed. BAL
ADJ 1 is then displayed which indicates the first
channel. The demodulated signal is viewed on the
CRT of a communications monitor and the Select
switch is rotated with the PTT switch pressed to
achieve the best square wave.
The balance for the other channels is set by
pressing the Select switch to select the next channel
and then repeating this adjust ment. BAL ADJ 1 - BAL
ADJ 6 correspond to the si x channels listed in Section
3.11.2. To exit this mode, all six channels must be
checked. The triangle/circle (encryption) symbol indicates that the current channel has been checked. The
settings are saved in memory when the mode is exited.
3.11.7 TRANSMITTER HUM AND NOISE
This function is used to check transmitter hum
and noise. The six channels in Section 3.11.2 are
selected by the Select switch, and the transmit audio
signal and receiver are disabled.
To change the power levels, press the Select
switch when PWR LEVELS is displayed. PW R
LVL 2 - PWR LVL 4 and 2W PWR LVL ar e then
selected by turning the Select switch. To change the
power of the displayed parameter, turn the Select
switch with the PTT switch pressed. The relative
power output is indi cated by 0-127 as described in
Section 3.11.3. The settings are saved in memory
when this mode is exited.
The power levels th at can be set can be any power
in the minimum to maximum range for t hat transcei ver
3.11.8 DC VOLTAGE CHECK
This function displays the voltage of the 13.8V
power supply. Transmit channe l 1 is sel ecte d, and bot h
microphone audio and transmit data are disabled.
3.11.9 DISPLAY TEST
This function tests all segments of the display in
sequence. If the PTT switch is pressed, all segments
are enabled but no power output is produced.
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Part No. 001-9750-005
TRANSCEIVER PROGRAMMING
SECTION 4 TRANSCEIVER PROGRAMM ING
Remote Programming Interface (RPI)
Figure 4-1 Programming Setup
4.1 GENERAL
4.1.1 PROGRAMMING SETUP
The following items are required to program the
transceiver and control unit. The part numbers of this
equipment are shown in Section 1-1 in Section 1. A
programming set-up is shown above.
• IBM
®
PC or compatible personal computer
• E.F. Johnson Rem Prog Interface (RPI)
• Cables from the RPI to the computer and tran sceiver
or control unit
• E.F. Johnson Summit programming software.
Cable
Part No. 023-9800-000
Part No. 023-9750-005
To
Battery
The cables from the RPI to the computer and
transceiver are not included with the RPI. The 9800
RPI has a female DB9 connector for the computer
connection. Since most comput ers have a mal e DB9 or
DB25 connector, a male DB9 to female DB9 or DB25
cable is usually r equired. Earlier RPIs such a s the 975 0
have a female DB25 connector. These are standard
cables available at most computer supply stores or
suitable cables are listed in Tabl e 1-1.
The cable from the RPI to the transceiver or
control unit (remote versions) has a connector which
plugs into the microphone jack. The cable for this
application is also listed in Table 1-1.
To
Antenna
To
Ign Sense
4.1.2 COMPUTER DESCRIPTION
The programming software is designed to run on
an IBM PC o r compatible computer that meets the
following minimum requirements:
• A 3-1/2” disk drive and hard disk drive
• 640K of memory
• MS-DOS version 3.0 or higher
• An unused serial port
4.1.3 REMOTE PROGRAMMING INTERFACE
(RPI)
The RPI provides the required interface between
the computer and transceiver. It converts the RS-232
logic levels from the computer to the TTL logic levels
required by the transceiver microprocessor and vice
versa. This RPI (P.N. 023-9800-000) programs standard personality inform ati on and als o the Write-On
flash memory (see next section).
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TRANSCEIVER PROGRAMMING
With Summit DM and Viking® HT/GT transceivers, the switch on the RPI selects either the standard or Flash programming mode. The indicator is
green when the standard mode is selected and red
when the Flash mode is selected.
4.1.4 EEPROM DATA STORAGE
Information which changes from transceiver to
transceiver is stored by EEPROM U406 on the audio/
logic board. This type of device stores data indefinitely without the need for a constant power supply.
The transceiver can be removed from the vehicle or
even stored on a shelf indefinitely without affecting
programming. Since an EEPROM is al so reprogrammable, a new device is not needed if programming
must be changed.
The operating pr ogram of t he trans ceiver i s store d
by Flash memory U404 on the audio/logic board. If
this program needs to be updated, reprogramming is
performed using the same programming setup.
However, special programming software is required.
The procedure for reprogramming the Flash memory
is located in Section 4.7.
Version 204 - Became available in early 1996. This
version has an addi tional parameter on the “Mai n Radio
Parameters” scree n for spe cifying t he horn al ert oper ating mode (see Section 3.6.4).
V ersion 205 - Became available mid 199 7. This version
added an additional “Start At Home” parameter on the
Create/Edit Bank screen (see Section 3.6.6).
Version 206 - Became available in late 2000. This version added an additi onal proceed tone delay time screen
that is selectable by pressing the F6 key from a group
programming screen (see Section 3.6.3).
This programming software is backward compatible which means it can also program all transceivers
with early versions of software. However, added
features are not available unless the transceiver software is also updated. The files generated by an earlier
programming software version are automatically
converted to a new format hen they are opened and
then saved or downloaded. Once a file is converted to
the new format, it cannot b e used by a n earl ier versi on.
Refer to App endix A.4 for more information on software revisions.
4.1.5 SOFTWARE VERSION NUMBER
NOTE: All transceivers with operating software Version 206 or later (see Appendix A) must be programmed using Version 202 or later programming
software. Failure to do so may result in erratic transceiver operation.
This section describes programming software
Version 206 which became available in late 2000. The
main features of this and earlier releases are as
follows:
Version 202 - Had additi onal screens f or programmi ng
the UD
2
I (universal in terfa ce) a nd has an add it ional parameter in the bank screen for programming “Wide
Area Group T racking”. Refer to Appendix A.4 for more
information.
Version 203 - Became avail ab le in January 1995. This
version has an addit ion al ques ti on on the “Main Radio
Parameters” screen for specifying if encryption is installed. See Section 3.6.12 for more information.
4.1.6 COMPUTERS RUNNING WINDOWS
®
The Summit DM programming software is a
DOS program that is not designed to run in Windows.
Therefore, if applicable, Windows must be exited and
the progra m run in the DOS mode.
4.1.7 SOFTWARE INSTALLATION
When you receive the programming software,
make a backup copy and store the master in a safe
place. You may want to create a separate directory for
programming. For example, to create a directory
called RADIOPRG on drive C: using D OS, type C:
(Enter) to make it the current directory if necessary.
Then type MD \RADIOPRG (Enter). To change to that
directory, type CD \RADIOPRG.
The programming software is shipped in a
compressed format. The name of the compressed file
is SUMMIT2. EXE and unpacks into two files called
SUMMIT.EXE and DM_PGMR.HLP. These files are
approximately 454K and 78K in size, respectively.
4-2
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Part No. 001-9750-007
TRANSCEIVER PROGRAMMING
To unpack these files so that they can be used,
first make sure that the current directory is destination
directory for these files. For example, if hard drive C:
is the destination, make it the current directory (if
required) by typing C: (Enter). Then if using a subdirectory, type CD as just described. Then insert the
program disk in the computer and type A:SUMMIT2
(or B:SUMMIT2 if drive B: is being used). The two
program files are then a uto matica lly unpa cke d into t he
current directory.
4.1.8 HARDWARE HOOKUP
The programming setup is shown in Figure 4-1.
The cable from the RPI to the transcei ver is connected
to the microphone jack of the transceiver with front
mount models. With remote mount models, it can be
connected to either the microphone jack of the control
unit or the programming jack on the blank front panel
of the transceive r. The RPI has a switch which must be
in the correct position. Make sure that the standard
mode, indicated by a green light, is selected.
4.1.9 MINIMUM FREE MEMO RY REQUIRED
Approximately 525K of free conventional
memory is required to run this program (use the
CHKDSK or MEM command to display the amount o f
free memory). If you have at least 640K of memory
and not enough is avai lable, there may be other
programs that are also being loaded into conventional
memory. Refer to your MS-DOS
®
manual for i nformation on how these programs can be moved or
disabled to make more space available.
4.1.10 STARTING THE PROGRAM
4.1.11 HEADER INFORMATION
The following information is contained in the
header area at the top of the screen.
Free Space
- Displays the amount of space remaining i n
the transce iver EEPROM if it was pr ogrammed with
the current information. The maximum number of
systems that can be programmed is determined by the
system type and the number of groups that are
programmed in each system.
Radio Model
- Displays the tr ansceiver model and frequency range of th e fil e bein g edit ed. This i nformat ion
is specified when a new file is created and cannot be
changed later. The extension of the file name
(xxxxxxxx.ext) indicates the model. For example,
“.SM8” indicates that the file is for a Summit DM 800
MHz transceiver. To display the radio serial number,
press the F7 key when in the Main menu (see Section
4.3).
File Name
- Displays the name of the transceiver configuration file that is currently being edited. If a new file
is created and it has not yet been saved, it is called
“NEW”.
4.1.12 SPECIAL KEYS
Escape - The Escape key is pressed to go back to the
preceding screen. If information was changed in the
current screen, the changes on that screen are saved in
a buffer but not to a disk file.
Return - Pressing the Ret urn key (or ENTER on s ome
keyboards) usually executes the changes made to a parameter or screen. The change is saved in a buffer but
not to a disk file.
Turn the computer on as described in the
computer instruction manual. Once the DOS prompt
has been obtained, st art the program by typing
SUMMIT and pressing Enter. The SUMMIT .EXE and
DM_PGMR.HLP files should be in the current directory as described in Section 4.1.10.
NOTE: The program automatically detects most video
cards. If it does not operate properly with a monochrome monitor, try starting it in the monochrome
mode by typing SUMMIT M.
Arrow Keys - The arrow keys a re usually used to move
the cursor or highlight bar to the next or previous
parameter.
Numbers/Letters Preceding Description - An alternative method for quickly selecting screens or functions is to press the number or letter key preceding the
description when applicable.
F1 (Help Select) - Displays help inf ormation on the selected parameter.
Revised December 2000
4-3
Part No. 001-9750-007
TRANSCEIVER PROGRAMMING
Figure 4-2 Programming Software Menu Structure
4-4
Revised December 2000
Part No. 001-9750-007
F2 (Help Screen) - Displays help information on the
displayed screen.
F3, F8 - Not used.
F4 - F6 - Use varies acco rding to the screen that is se-
lected. Refer to the separate screen descriptions for
more information.
F7 - When in the main menu, d isplays the serial number
of the transceiver being progr ammed (see next section).
F9 (Prev Menu) - Returns to the previous menu or
screen.
TRANSCEIVER PROGRAMMING
F10 (Exit Program) - Exits the program and returns to
the operating syst em. Before exit occurs, a prompt appears to allow the current file to be saved. If it is not
saved in this manner or has not been previously saved
using “Configuration File Utilities” screen, all changes
will be lost.
4.2 MAIN MENU
4.2.1 INTRODUCTION
The Main Menu appears when the program is
started. This menu is used to select the function to be
performed. It selec ts if a new configu ration fi le is to be
created, an old file edited, or the current file is to be
printed, saved or downloaded to a radio. It is also used
to upload a file from a radio, and to copy, rename, or
delete a disk file. This menu is shown in Figure 4-3,
and the parameters in it are described in the following
information. A block di agram s howing t he str ucture of
the program is shown in Figure 4-2.
The following functi on keys perform special
functions in this menu. Other function keys that are
active in this menu are described in the preceding
section.
F5 (Change Dir) - Displays the screen that changes the
current directory. When a configuration file is loaded
from or saved to disk, it is al ways from or to the current
directory. Therefore, if you need to change this directo ry, select this screen.
Figure 4-3 Main Menu
F7 (Show SN) - Displays the s erial number of the transceiver. This number is the same as the identification
number described in Section 1.4, and it is stored in
memory and cannot be changed.
4.2.2 SET UP NEW CONFIGURATION FILE
This function is used to create a new configuration file. The type of radio is selected and then the
Modify Radio File menu described in Section 4.3 is
displayed. The rad io type specified for a file cannot be
changed after it is sele cted. Therefore, it is not
possible to copy a file of one rad io type and then edit it
for use as another type.
4.2.3 OPEN CONFIGURATION FILE
This function is selected to open a configuration
file stored on disk and loa d it into memo ry. The files in
the current directory are displayed and then the arrow
and Return keys are used to select the desired file. If
the file is in another directory, press the Escape key
and then F5 to change the current directory (see
Section 4.2.1). After the file is opened, it can be
edited, downloaded, printed, saved, copied, or
renamed using the functions described in the next
sections.
4.2.4 MODIFY CURRENT CONFIGURATION
FILE
F6 (Show Files) - Displays the names of all radio configuration files that are in the current directory.
This function is selected to edit the file currently
residing in memory. This file must have been previ-
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4-5
Part No. 001-9750-007
ously loaded from disk as described in the preceding
section or from a transceiver as described in the next
section. If there is no file currently in memory, a
message is displayed. This function displays the
Modify Radio File menu described in Section 4.3.
When the program is started, the last file edited is
automatically loaded if it is in the cu rrent directory.
4.2.5 UPLOAD CONFIGURATION FROM RADIO
This function is selected to copy (upload) a file
stored in a transceiver into the computer memory. It
can be used to check transceiver programming or use
the data stored in one transceiver as a basis for
programming another transceiver. The screen
displayed by this function is shown below.
TRANSCEIVER PROGRAMMING
4.2.8 MODIFY PRINTER/SERIAL POR TS
This function i s us ed to specify the computer por t
used by the printer and RPI (see Section 4.1.3). The
printer can be conn ected to ei ther par allel por t LPT1 or
LPT2 (a serial port cannot be used). The RPI can be
connected to serial port COM1 or COM2. There is
also an option to either save or not save the selected
configuration for the next time tha t the pr ogram is r un.
The screen displayed by this function is shown below.
Use the arrow keys and s paceba r to di splay t he desi red
configuration and then press Return with “Save
Changes” highlighted to select that configuration.
4.2.6 DOWNLOAD CONFIGURATION TO
RADIO
This function is selected to prog ra m the transceiver with the configuration file that is currently in
memory . Follow the instr uctions on the screen . If some
data is incorrect or has not been entered, a message is
displayed and the file is not downloaded. When
programming is occurring, “PROG MODE” and the
rotating scan indicators are displayed.
4.2.7 PRINT CURRENT CONFIGURATION FILE
This function is selected to print the information
in the current file. The computer port used for the
printer can be s elect ed as descr ibed i n the next s ectio n.
The file information can also be printed to a disk file
instead of the printer. It is always printed to a file
called PRINTOUT.PRN. Therefore, if there is already
a file by tha t name in the current directory, it will be
overwritten. The screen displayed by this function
follows.
4.2.9 CONFIGURATION FILE UTILITIES
This function is selected to save, copy, rename, or
delete a radio configuration file. The “Save” function
saves the current configuration file to disk. This function should be used periodically while editing a file to
ensure that all data is not lost if a powe r failure occurs
or program execution is interrupted for some other
reason.
The copy, rename, and delete functions are
performed on disk files. The files in the current direc-
4-6
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Part No. 001-9750-007
TRANSCEIVER PROGRAMMING
tory are listed and then the arrow and Return keys are
used to select the file. When copying a file, it must be
given a new name and/or destination in the destination box. The screen displayed by this function
follows.
4.3 MODIFY RADIO FILE MENU
4.3.1 INTRODUCTION
The Modify Radio File menu is used to select the
screens which program the various types of radio
configuration information. This menu is shown in
Figure 4-4, and the screens selected by this menu are
described in the following information. The Main
Menu functions described in Sections 4.2.2 and 4.2.4
select this menu.
Number/Letters Preceding The Parameter - An alternate method for qu ickl y selec ting th ese sc reens is to
press the number or letter key preceding the description. For example, to select the Setup Menu screen,
press “3”.
F5 (Show Banks) - Displays the alpha ta g of each bank
programmed in the current radio file.
F6(Show Systems) - Displays the alpha tag and type
of all systems programmed in the current radio file.
“M” = Multi-Net, “L” = LTR, and “C” = conventional.
4.3.2 EDIT MAIN RADIO PARAMETERS
This function selects the Main Radio Parameters
screen which is used to program transceiver parameters that are the same for all banks and systems. This
screen and the paramet er s it programs are described in
Section 4-1.
The Status Definitions section of the screen is
used to program the stat us conditions that are
displayed by the STAT option switch or Menu Mode
“STATUS” parameter. Status information is transmitted in the Multi-Net mode only (see Section 3.7.3).
The Universal Interface (UD
2
I) Options screen is
selected by pressing the F4 key while the Main Radio
Parameters screen is displayed. If the Universal Interface feature is used, this screen programs the parameters that are the same for all systems. The Universal
Interface parameters that can be different for each
system are programmed by the screen displayed by
pressing key from the system programming screen.
Refer to Section 4.7 for more information on
Universal Interface Programming.
Figure 4-4 Modify Radio File Menu
The following keys have special functions in this
menu. Other special keys are described in Section
4.1.12.
4.3.3 DEFINE OPTION BUTTONS
The Define Option Buttons screen shown in
Figure 4-5 programs the six optio n buttons o n the front
panel of the trans ceiver or control unit. The arrow keys
select the button to be prog rammed and the Retur n key
is pressed to move to the box on the right which lists
the available choices for that button. Use the arrow
and PgUp/PgDn keys to move the highlight block to
the desired choice and select that choice by pressing
the Return k ey.
Revised December 2000
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TRANSCEIVER PROGRAMMING
An on-off indicator is available in the display for
only the first three keys. Since some functions require
this indicator, they are not displayed for the keys that
do not have an indicat or. Refer to Section 3.5 for mor e
information on the option switches.
4.3.4 SETUP MENU FUNCTIONS
The Setup Menu screen is shown in Figure 4-6.
This screen specifies which menu items can be
selected by the user. Some functions are also controllable by an option switc h. If an option switch has been
programmed, the function cannot be enabled in the
menu.
If an item is programmed as not sele ct able (INCL
= No), it is fixed in the condition displayed in the
Default co lumn (if an op t ion switch is not
programmed). For example, if Backlight Control = No
and Default = Enabled, the BACKLIGHT menu
parameter is not selectable by the user and the backlight is always on when power is on.
edited is sel ected from a li st of th e cu rrent syst ems th at
is displayed. The arrow and Return keys are used to
select the desired system.
The Multi-Net, LTR, and conventional Create/
Edit System screens and desc riptions of t he parameters
they program are located in the follo wing tables:
This screen is used to create a new system by
copying information from another. The system to be
copied is selec ted fr om a list and then the alpha tag for
the new system is ent ered. Th is funct ion doe s not cop y
anything to a disk file; it only copies to a new system
in the buffer.
If a menu item is selectable, the default condition
exists only until that function is changed by the user
(the last selected and not this default condition is
selected when power is turn ed on). Use t he arro w keys
and spacebar to select the desired parameter in each
column. Refer to Section 3.5 for more information on
Menu Mode parameters.
4.3.5 CREATE/EDIT/COPY/DELETE S YSTEM
Create System
The Create System functions are used to create
new LTR, Multi-Net, or conventional systems. The
alpha tag for the new system is entered and then the
Create/Edit System screen is displayed. The system
alpha tag can be up to ten characters long, similar to
the bank alpha tag. The system alpha tag is used only
for programming and is not displayed by the
transceiver.
Edit System
The Edit System function is used to change the
parameters of a current system. The system to be
Delete System
This screen is used to delete a curren t system.
The system to be deleted is selected from a list. This
function does not delete anything on disk; it only
deletes the selected system in the buffer.
Programming Group Information
The group paramete r screen is displayed from the
system screen by pressing F6. With LTR systems, this
screen is also used to program channel information.
The group screens and descriptions are shown in the
tables listed in the preceding “Edit System” section.
To return to the system screen, press the F9 or Escape
key.
To program the PTT (proceed) tone delay time,
press the F6 key from the ap plicable group scree n. The
following screen is then displayed to program the
delay time for the system and select the group on
which the delay is active. Numbers from 1-15 can be
entered, with each number rep re senting a delay of 125
ms. For example, entering “4” programs a delay of 4 x
125 or 500 ms.
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Figure 4-5 Define Option Buttons Screen
Figure 4-6 Setup Menu Functions Screen
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4.3.6 CREATE/EDIT/COPY/DELETE BANK
Create Bank
This Create Bank function is used to create a new
bank. At least one bank must be created even if banks
are not going to be selected. Banks are identified by
alpha tag and selected by the BANK option switch or
“Bank Select” Menu Mode parameter. An alpha tag
can have up to ten characters. Most printable ASCII
characters can be used except the following:
PTT Tone Delay Programming Screen
Linking Systems To A Bank
A system can be linked to a previously created
bank from the Crea te /Edi t Sys tem scr ee n a s f ol lows or
from the Create/Edit Bank screen described in Section
4.3.6. To do this, proceed as follows:
a. When system information is being programmed, the
current banks are displayed on the right side of the
screen. If the current system is in a bank, there is a
system number to the righ t of the ba nk name. If it i s
not in the bank, “xx” is indicated.
b. T o add or delete the curr ent system, press th e F5 key
and then use the arrow keys t o highl ight th e desi red
bank. To add the current system to that bank, press
the “A” key; to delete it from that bank, press the
“D” key.
c. If a system was added, the highlight bar moves to
the system number column. This column programs
the number of that system in the displayed bank.
Enter the desired number from 1-99. Press the
Return key once to make the change and press it
again to go back to editing system information.
Programming System Universal Interface Options
To display the screen that pr ogr ams t he Universal
Interface parameters for the system, press the F4 key.
Refer to Section 4.7 for more information on
Universal Interface programming.
# & ( ) , . : ; [ ]
After the alpha tag is ent ered, the Create/Edit
Bank screen is displayed. This screen is used to edit
information unique to a bank. This screen and the
parameters it programs are described in Table 4-5.
Edit Bank
The Edit Bank function is use d to change parameters of previously cre ated ban ks. The bank to be ed ited
is selected from a list of the current banks, and the
arrow and Return keys are used to select the desired
bank. The Create/Edit Bank screen is then displayed
(see preceding “Create Bank” description).
Copy Bank
This screen is used to create a new bank by
copying information from another bank. The bank to
be copied is selected from a list and then the alpha tag
for the new bank is entered. This does not copy
anything to a disk file; only to another bank in the
buffer.
Delete Bank
This function is used t o delete a current b ank. The
bank to be deleted is selec ted fr om a list . This doe s not
delete anything on disk; only the selected bank in the
buffer.
Linking Systems To A Bank
Systems are created u sing the Create System
screen or Copy System functions. The programmed
systems can then be linked to a bank from either the
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TRANSCEIVER PROGRAMMING
System programming screen (see Section 4.3.5) or the
Create/Edit Bank screen.
Systems are identif ied by alpha tags, and numbers
are assigned when a system is linked to a bank.
Different system numbers can be assigned in each
bank even if identical systems are used in the banks.
To link a system to a bank from the Create/Edit Bank
screen, proceed as follows:
a. When bank information is being programmed, the
current systems are dis played on the right side of the
screen. If a system is in the current bank, there is a
system number to the righ t of the ba nk name. If it i s
not in the bank, “xx” is indicated.
b. T o add or delet e a system, press t he F6 key and then
use the arrow keys to highlight the desired system.
T o add that system to the curre nt bank, press the “A”
key; to delete it from that bank, press the “D” key.
c. If a system was added, the highlight bar moves to
the system number column. Thi s programs the n umber of that system in the current bank. Enter the
desired number from 1-99. Press the Return key
once to make the change and press it again to go
back to editing bank information.
4.3.8 EDITING UNIQUE ID CODES
The unique ID code programmed for each MultiNet system can be edited by selecting the “Setup/
Change Unique ID” parameter in the Modify Radio
File menu (see Figure 4-4). This displays the screen
shown in Figure 4-8. This screen allows all Multi-Net
unique ID's to be conveniently edited without having
to display each system screen.
Figure 4-7 Telephone Numbers Screen
4.3.7 PROGRAMMING PRESTORED
TELEPHONE NUMBERS
If the PHONE option switch or “TELEPHONE”
menu parameter is programmed, the Phone Mode can
be selected to place telephone calls (see Section
3.6.13). The Telephone Numbers screen shown in
Figure 4-7 can then be used to prestore up to ten telephone numbers. This screen is selected by the “Setup
Prestored Telephone Numbers” parameter in the
Modify Radio File menu (see Figure 4-4).
The alpha tag and not the telephone number is
displayed when a number is recalled. This alpha tag
can include any ten charac ters e xcept t he ones list ed in
Section 4.3.6. Telephone numbers up to 29 digits long
can be programmed. Do not enter dashes. The “*” and
“#” characters program the DTMF tone for those characters. If “Assigned” is “No”, the telephone number
cannot be recalled by the user.
Figure 4-8 Setup/Change Unique ID Screen
4.4 ADDITIONAL PROGRAMMING
INFORMATION
4.4.1 REPEATER NUMBER PROGRAMMING
(MULTI-NET AND LTR)
Each Multi-Net repeater site can have up to 30
repeaters, and each LTR repeater site can have up to
20 repeaters. The repeaters at the same site are
assigned a unique number from 1-30 or 1-20. With
Multi-Net systems, these numbers can be assigned
arbitrarily as long as no two repeaters have the same
number.
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With LTR systems, they can also be assigned
arbitrarily. However, for maximum system efficiency,
a scheme should be used which equalizes, as much as
possible, the gaps between numbers. For example, a
five-repeater system should use numbers 1, 5, 9, 13,
and 17. The number assigned to a repeater is
programmed in the repeater, the mobiles assigned to
that home repeater, and the System Management
Module (Multi-Net only).
4.4.2 CHANNEL NUMBER PROGRAMMING
With LTR operation, the mobile transceiver is
programmed with the channel number of eac h repeater
it can access. With Multi-Net operation, this is not
necessary because the mobile transceiver receives “go
to” channel information over the air. The only channels that are pr ogrammed in Multi-Net systems are the
home and status channels. This allows channels to be
added to the system without reprogramming the
mobiles.
Each Multi-Net system can be programmed with
a different home repeater number if desired. However,
systems with the same site number must be
programmed with the same status channel number.
Refer to Section 4.4.4 for more information on s ite
numbers.
The channel numbers used to program this transceiver are listed at the end of this section. The channels used for programming channels 1-600 are the
same as the FCC channel numbers. However, for
channels above 600, a special programming channel
number is used because some frequencies were
skipped by the FCC scheme. A –12.5 kHz offset can
be specified for chan nels 1-600 because th ey have a 25
kHz spacing. This offset does not apply to channels
above 600 because they already have a 12.5 kHz
spacing.
4.4.3 ACCESS PRIORITY PROGRAMMING
(MULTI-NET ONLY)
priority number being transmitted is greater than the
priority number assigned to the ID code being transmitted, the system cannot be accessed at that time.
There are various schemes that the repeater may use to
determine the current system priority. Refer to the
setup section of the repeater service manual for more
information.
4.4.4 SITE NUMBER PROGRAMMING
(MULTI-NET ONLY)
Each Multi-N et repeater site must be a ssigned a
number from 1-255. A repeater site is defined as a
group of repeaters which share the same high-speed
data bus (refer to Section 5.6). The site number
programmed in the mobile is used for controlling scanning. A site number is also transmitted in the form of
DTMF tones when a special call is made by a mobile
to a different site. The System Management Module
uses the site information to route the call. Refer to
Section 5.7 for more information on special calls.
If there is only one site that can be accessed by
the mobiles, the site n umber of the re peater sy stem can
be selected arbitrarily. Each selectable system of the
mobile is then programmed with that site number. If
there are several sites that can be accessed, each site
must be assigned a unique number. Each selectable
system of the mobile is then programmed with the
number of the site that is accessed by that system.
4.4.5 SPECIFYING RIC-EQUIPPED
REPEATERS
When programming the channel numbers of LTR
systems, you can specify if the repeater is equipped
with an E.F. Johnson RIC (repeater interconnect)
controller. If a system with a transmit ID code
programmed for RIC is then selected, the transceiver
will attempt to access only repeaters specified as
equipped with repeat er interconnect. This allows both
RIC and non-RIC repeaters to be programmed in each
system.
Each Multi-Net encode (transmit) ID code is
programmed with an access priority number from 1-5.
As stated in Section 5.8.2, this access priority and the
current system priority being transmitted by the
repeater determi ne if t he system c an be acce ssed. If the
Without this feature, the transceiver may trunk to
a repeater not equippe d with a RIC drawer when a RIC
call is made. No dial tone or other supervision is then
returned when the PTT switch is released which may
be confusing to the user.
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TRANSCEIVER PROGRAMMING
4.4.6 WIDE AREA GROUP TRACKING
PROGRAMMING
When Wide Area Group Tracking is enabled with
Multi-Net Au to-Registration (see Section 3.7.2), the
same group remains selected when auto-registration
on another system occurs. This allows a companion
group to be automatically selected in the new system.
For example, the transceiver can be programmed so
that if a telephone group is selected and auto-registration occurs on a new system, a telephone group is also
selected on the new system. Without wide area group
tracking, the last selected group of the new system is
selected.
With th is ty pe of opera tion, it is i mportant t hat th e
same groups in all systems be programmed. If autoregistration occurs on a system that does not have the
group programmed (ASN = No), the next higher
programmed group is selected and displayed. The
selected group then changes by one or more which is
probably not the desired operation. This occurs
because all groups that are higher in number ar e pulled
down to fill the empt y position(s). Therefore, the
group also changes when auto-registration occurs on
that system with a group selected that is higher than
the unprogrammed group.
4.5 PROGRAMMING ONE TRANSCEIVER WITH
ANOTHER (CLONING)
One transceiver can be used to program another
with identical information. One use of this type of
programming may be to reprogr am a tran sceive r in t he
field where a computer is not available. Transceivers
of different types cannot be used. For example, do not
use an 800 MHz model to program a 900 MHz model.
Proceed as follows:
a. Turn the power of both transceivers off. Connect
Cloning Cable, Part No. 59 7-2002-268, between th e
microphone connectors of the transceivers.
b. Turn the power of the master (source) transceiver
on. Then turn the power of the slave (destination)
transceiver on.
c. Programming is indicated by “CLONING” in the
alphanumeric display and the rotating scanning
indicators in the status display of both transceive rs.
In addition, the system and group number are displayed by the master transceiver.
d. When programming is finished, the displays return
to normal.
4.6 WRITE-ON FLASH PROGRAMMING
Therefore, when programming wide area group
tracking, observe the following rules:
• Assign companion groups in s equence s tarting with
Group 1 and make sure that the same groups are
programmed in each participating system.
• If groups are programmed that are not companions
with groups in other systems, program them above
the companion range. Then do not leave one of
those groups sel ected after usi ng it for a cal l because
if auto-registration occurs, an unexpected group
may be selected.
When the transceiver is programmed, the
programming software does not allow the transceiver
to be programmed if all programmed systems do not
have the same number of programm ed groups.
However, i t does not ch eck to make sur e th at t he same
groups are programmed in each system.
4.6.1 INTRODUCTION
The E.F. Johnson Write-On flash programming
feature allows the transceiver operating software
(firmware) to be update d without replacing the microcomputer or a memory device such as an EPROM.
This reprogramming of the operating software
should not be confused with the programming of operating parameters described in the preceding sections.
Although both program ming procedures use essentially the same programming setup, the software and
procedures are diffe rent.
Currently, the Write-On flash programming software is available only by downloading it from the E.F .
Johnson ACES
®
Bulletin Board System. To access
this system, dial toll-free from the U.S. and Canada
800-227-3997 (N, 8, 1, ANSI). From other countries,
dial 507-835-8607. If you do not know your login ID
Revised December 2000
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TRANSCEIVER PROGRAMMING
or have questions about accessing the ACES system,
call 800-328-3911, extension 7 (USA and Canada) or
507-835-6222, extension 2100 (international).
4.6.2 PROGRAMMING FILES
The files required to flash program a transceiver
are contained in a co mpressed self-extracti ng file called
DMFLASH.EXE. This file is located in the
MNFLASH download area of the ACES syst em. Once
this file is download ed, simply type DMFLASH (Enter)
at the DOS prompt to extract the following files:
The SUMMIT_x.S19 files contai n the actual c ode
that is loaded into the transceiver by the program .
These are the files that are changed when the radio
operating software is updated.
4.6.3 PROGRAMMING “A” MODEL
TRANSCEIVERS
023-9750-000 or 023-9800-000, can be used (the
earlier 023-5810-000 model will not work).
NOTE: The RPI must always be connected to the f ront
panel jack of the t ransceiv er (it cannot be connect ed to
the microphone jack of a remote control unit).
b. Set the switch on the RPI so that it is toward the
LED.
c. Start the program by typing DM_LOAD (Enter) at
the DOS prompt. When the opening screen is displayed, turn transceiver power on . If power is
already on, cycle power off and then on. The transceiver display should be blank and the RPI LED
should be amber.
d. Highlight the fi rst selection in the loader program's
menu and then press the Enter key to beg in th e da ta
transfer. Programming requires approximately 90
seconds.
e. Disconnect the programming cable from the trans-
ceiver and cycle power off and on. Verify that the
new revision number is displayed momentarily
when power is turned on (see Section 3.6.14).
4.7 UNIVERSAL INTERFACE PROGRAMMING
4.7.1 INTRODUCTION
NOTE: Before any Summit DM “A” revision letter
transceiver and also “B” revision letter 9755 transceivers can be connected to the RPI module, pin 1 of
power amplifier module U500 must be desoldered and
lifted from the board.
If this is not done with these transceivers, the
transmitter may erroneously key when the RPI switch
is moved to the flash position. This may result in
excessive current draw that could damage the antenna
switching circuit ry. Diodes CR506 and CR507 and RF
amplifier Q290 could be dest royed. Fuse F500 may
also blow if the power supply can produce enough
current. This problem has been corrected in later
models, so this modification is not required.
4.6.4 PROGRAMMING PROCEDURE
a. Connect the programming hardware listed in setup
as described in Section 4.1.1. Only RPI, Part No.
The UD2I™ (Universal Digital and Data Interface) feature is available on all Summit DM transceivers that have Version 207 or later operating software (see Appendix A). Optional universal interface
pigtail cable assembly, Part No. 597-2002-245, is
required to utilize this interface (Validation Key, Part
No. 250-9750-050, is no longer required). This cable
provides a female 25-pin D-type connector for interfacing with the data equipment.
This is a non-proprie tary interface t hat can be used
to connect various types of data equipment such as
modems and data terminals to the transceiver. A
detailed descrip tion on the operat ion of this inte rface is
located in Appendix B. This in formation can be used to
design and set up equipmen t for use with th is interface.
Various aspects of this interface are programmable using the standard transceiver programming
software (Version 202 or later). The parameters that
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TRANSCEIVER PROGRAMMING
can be programmed and configurations that can be
selected for each are described in the following information. Since the specific configuration of these
parameters is determined by the equipment being
used, detailed programm ing instructions are not
included in this manual (this information should be
provided by the equipment manufacturer).
NOTE: All interface parameters should be left in the
default condition (indicated by *) unless instructed
otherwise in the instal lation i nformation pr ovi ded with
the data equipment. Failure to do so may result in
improper transceiver operation.
NOTE: The system level pr ogrammi ng described i n the
next section overrides the preceding Audio Rx/Tx programming except if “Undefined” is programmed.
Universal interface parameters that are the same
for all systems are programmed using the main
Universal Interface Options screen shown in
Figure 4-9. This screen is selected by pressing the F4
key from the Main Radio Parameters screen (see
Section 4.3.2). The parameters that can be
programmed using this screen and the available
choices are as follows:
NOTE: For more information on the configuration
selected by each option, refer to Appendix B.
* Default condition. Do not select “Undefined”
because improper operation may result.
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Part No. 001-9750-007
Figure 4-10 System Universal Interface
Screen
4.7.3 SYSTEM PARAMETERS SCREEN
There are also two parameters that can be
different for each system. These parameters are
programmed using the system Universal Interface
Options screen shown in Figure 4-10. This screen is
selected from the applicable system programming
screen by pres si ng the F4 key. The parameters that can
be programmed using this screen and the available
choices are as follows:
NOTE: For more information on the configuration
selected by each of the following parameters, refer to
Appendix B.
* Default condition. If “Undefined” is selected, the
radio-level parameter programmed in the preceding
section is in effect.
4.7.4 AUXILIARY AND EMERGENCY SWITCH
PROGRAMMING
When the Auxiliary 2 function is programmed, it
uses the OUTPUT B line of the universal interface
(see Section 3.5.4). For proper operation of this
switch, OUTPUT B must be programmed for the
default condition of AUX2. Universal interface
programming does not affect the Auxiliary 1 function.
NOTE: The problem of the Auxiliary 2 output always
going to the active state at power-up has been corrected with Version 206 and later transceiver operating software.
When an external emergency switch is used, it is
connected to INPUT B of the universal interface (see
Section 2.4.6). For proper operation of this switch,
INPUT B must be programmed for the default condition of EMERGENCY.
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Part No. 001-9750-007
Table 4-1 Main Radio Parameters Screen
TRANSCEIVER PROGRAMMING
ParameterAcceptable ResponsesDescription
Receive Delay Time0, 1, 2, 3, 4, 5, 6, or 7
seconds
Call Delay Time0, 1, 2, 3, 4, 5, 6, or 7
seconds
Scan Continue Time0-60 secondsMaximum time that a call is monitored before scanning resumes (Section
Enabled, DisabledEnables or disables the proceed-to-talk tone on conventional systems. It is
Tone
Trans mit Time-Out
Time
0.5-5 minutes in 0.5 min
steps, Disabled
Mic HangerEnabled, DisabledWhen “Disabled” is programmed, taking the microphone off-hook does
Display EmergencyYes, NoWhen “No” is programmed, the display does not indicate “EMER-
Priority 1 Sampling
Time
Disabled, 500 ms, 1 or 2
seconds
Select Knob DefaultS ystems or GroupsPrograms if the bar in the next parameter goes to the system or group dis-
Time before scanni ng resumes after a message is received (Section 3.4.3).
Time before scanning resumes after m essage is trans mitted (Section 3.4.3).
3.4.3).
Selects the system/group that is selected when the transmitter is keyed in
the scan mode or the scan mode is exited (Sections 3.4.4 and 3.4.5).
Selects power turn-off delay (Sections 2.4.3 and 3.6.7). If a transceiver
with Version 205 or earlier operating software is programmed, the times
are 10, 20, 30 minutes, 1, 2, or 4 hours.
always enabled on Multi-Net and LTR s ys tem s (Section 3.6.3).
Programs the Time-Out Timer (Section 3.6.1).
not enable the monitor mode or disable system and group scanning.
GENCY” when the Emergency switch is pressed (Section 3.6.8).
Selects how often the Priority 1 system/group (if programmed) is sampled
on conventional systems (Section 3.5.17).
play when power is turned on or the return time expires.
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Table 4-1 Main Radio Param eters Screen (Continued)
ParameterAcceptable ResponsesDescription
Select Knob Return
Time
Remote Trunk Mount Yes, NoPrograms the transceiver as a front or remote mount type. This is required
Radio Has Encryption
Installed
Horn Honk ModeMode A or Mode BPrograms the horn alert operating mode (Section 3.6.4).
Radio Can Be Disabled
(MN Only)
Radio Can Be Interro-
gated (MN Only)
Status DefinitionsUp to 10 characters (A-Z,
Dispatch Tx Camp-On Yes, NoSelecting “No” disables camp-on. Then if the P TT switch is pres sed while
0-15 seconds in 1-sec
steps
Yes, No“Yes” is programmed if encryption is installed. This routes all receive
Yes, NoSelects if the transceiver can be disabled by the Multi-Net Mobile Disable
Yes, NoSelects if the transceiver can be interrogated to determine its status (Sec-
0-9, etc.)
Programs the delay after a change is made before the bar returns to the
default display programmed above. “0” programs no return. This bar indicates which display will be changed by the Select switch (Section 3.2).
for proper operation of the microphone hanger (seeSection 2.5.5).
audio to the encryption modu le s o that en cryp ted calls are received even if
encryption is disabled (Section 3.6.12).
message (Section 5.8.5).
tion 5.8.4).
Programs the message that is displayed for up to eight status conditions
(Section 3.7.3).
receiving a call, the transmitter is disabled and the busy tone sounds until
the PTT switch is released (Section 3.7.7).
Table 4-2 Multi-Net System Parameters
ParameterAcceptable ResponsesDescription
Alpha TagAny keyboard characterChanges the 10-character alpha tag for the selected system. The system
Site1-255Programs the site nu mber of the system (Section 4.4.4).
alpha tag is used only for programming and is not displayed by the transceiver.
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Table 4-2 Multi-Net System Parameters (Continued)
ParameterAcceptable ResponsesDescription
OffsetYes, NoPrograms if channels are offset 12.5 kHz on the low side. This applies to
channels 1-600 only (Section 4.4.2).
Home Repeater
Number
Home Repeater
Channel
Status Repeater Channel
Transmit Inhibit ID1-225Programs the block of tran smit in hibit ID codes up to all 225. If an ID code
Block Decode1-225Programs a block of ID codes up to all 225 that are decoded regardless of
Key---This is a number uni que to y our sy stem assi gned by the E.F. Johnson Com-
Unique ID1-8163Programs the unique ID of the mobile (Sect ion 5.8 .1). Each Multi-Net sys-
Emergency System/
Group; Automatic
Power Level1, 2, 3, 4, 2WPrograms the output power selected by this system. The power output pro-
QueueEnabled, DisabledPrograms if busy queuing occurs on the system (Section 3.7.1).
Group ScanEnabled, DisabledPrograms if group scanning occurs on the system (Section 3.4.7).
Scan ListYes , NoPrograms if the system is scanned (Section 3.4.6).
CompandingYes, NoPrograms if companding is u s ed on the system (Section 1.5).
Scan Dropout
Criteria
Priority 1/2 Decode1-225, 236, 237 [1]Programs the priority decode (receive) ID codes (Section 3.3.4).
Call LightY es, NoPrograms if the Call indicator lights when a call is received on that ID code
HornYes, NoPrograms if the horn sounds when a call is received on that ID code (Sec-
EncryptionYes, NoPrograms if encryption is used on calls received on that ID code (Section
1-30Programs the number of the home repeater of the transceiver (Section
4.4.1).
1-920 (800 MHz)
1-479 (900 MHz)
1-920 (800 MHz)
1-479 (900 MHz)
Programs the channel number of the home repeater (Section 4.4.2). Channel numbers are shown in the table at the end of this section.
Programs the channel number of the status repeater (Section 5.3). Channel
numbers are shown in the table at the end of this section.
within this block is decoded up to 5 seconds before the PTT switch is
pressed, the transmitter does not key (Section 3.7.5).
the group selected (Section 3.3.4).
pany (Section 5.8.9).
tem can be programmed with a different unique ID if necessary.
Any programmed system/
group; Auto = Yes or No
Programs the system/group on which emergency calls are made when the
emergency switch is pressed, if applicable. Auto specifies if automatic
transmitting occurs (Section 3.6.8).
duced by these numbers is set in the test mode. See Section 3.6.9 for more
information.
50-100%Programs the percentage of good data messages that must be detected to
stay on the current site with auto-registration. The default is 75% (Section
3.7.2).
(Section 3.6.2).
tion 3.6.4).
3.6.12).
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Table 4-2 Multi-Net System Parameters (Continued)
MULTI-NET GROUP PARAMETERS
(The Group Parameter screen is selected by pressing F6)
ParameterAcceptable ResponsesDescription
AsnYes, NoSpecifies if the group will be selectable.
Alpha TagA-Z, 0-9, etc.Specifies the 10-character alpha tag that is displayed when the group is
selected.
Group Enc/Dec1-225, 236, 237 [1]Specifies the encode (transmit) and decode (receive) ID codes for that
selectable group.
Call LightEnabled, DisabledPrograms if the Call indicator ligh ts when a call is received on that group
(Section 3.6.2).
HornEnabled, DisabledPrograms if the horn sounds when a call is received on that gro up (Section
3.6.4).
EncryptEnabled, DisabledP r ograms if encryption is used on calls received and transmitted on that
group (Section 3.6.12).
Scan ListYes, NoPrograms if that group is scanned by the group scan feature (Section
3.4.7).
Pri (Priority)1-5Programs the transm it access priority for that group. “1” is the highest pri-
ority and “5” the lowest priority (Section 5.8.2).
DataYes, NoPrograms if that group can be used for data transmissions (Section 3.6.11).
[1] 236 = Auxiliary Calls, 237 = Telephone (Interconnect) Calls. See Section 3.7.4.
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Table 4-3 LTR System Parameters
TRANSCEIVER PROGRAMMING
ParameterAcceptable ResponsesDescription
Alpha TagAny keyboard characterChanges the 10-character alpha tag for the selected system. The system
alpha tag is used only for programming and is not displayed by the trans-
ceiver.
Home Repeater1-20Programs the number of the home repeater of the transceiver (Section
4.4.1).
Area0, 1Selects the area of the LTR system. “0” is usually programmed unles s two
systems are close enough to interfere with each other. One is then pro-
grammed “0” and the other “1”.
Repeater Interconnect 1-250Programs the block of Repeater Interconnect (RIC) ID codes up to all 25 0.
If an ID code within this block is selected or decoded, the transceiver
enters the RIC operating mode and telephone calls can be placed or
received.
Transmit Inhibit ID1-250Programs the block of tran smit in hibit ID codes up to all 250. If an ID code
within this block is decoded up to 5 seconds before the PTT switch is
pressed, the transmitter does not key (Section 3.7.5).
Block Decode1-250Programs a block of ID codes up to all 250 th at are decoded regardless of
the group selected (Section 3.3.4).
Emergency System/
Group; Auto
Power Level1, 2, 3, 4, 2WPrograms the output power selected by this system. The power output pro-
Group ScanEnabled, DisabledPrograms if group scanning occurs on the system (Section 3.4.7).
Scan ListYes , NoPrograms if the system is scanned (Section 3.4.6).
CompandingYes, NoPrograms if companding is us ed on the syst em (Section 1.5).
Priority 1/2 Decode1-250Programs the priority decode (receive) ID codes (Section 3.3.4).
Call LightY es, NoPrograms if the Call indicator lights when a call is received on that ID code
Any programmed system/
group; Auto = Yes or No
Programs the system/group on which emergency calls are made when the
emergency switch is pressed, if appli cable. With LTR systems, automatic
transmission are not available, so “Auto” = “No” (Section 3.6.8).
duced by these numbers is set in the test mode (Section 3.6.9).
(Section 3.6.2).
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TRANSCEIVER PROGRAMMING
Table 4-3 LTR System Parameters (Cont inued)
ParameterAcceptable ResponsesDescription
HornYes, NoPrograms if the horn sounds when a call is received on that ID code (Sec-
tion 3.6.4).
EncryptYes, NoPrograms if encryption is used on calls received on that ID code (Section
3.6.12).
LTR GROUP PARAMETERS
(The Group Parameter screen is selected by pressing F6)
AsnYes, NoSpecifies if the group will be selectable.
Alpha TagA-Z, 0-9, etc.Specifies the 10-character alpha tag that is displayed when the group is
selected.
Group Enc/Dec1-250Specifies the encode (transmit) and decode (receive) ID codes for that
selectable group.
Call LightEnabled, DisabledPrograms if the Call indicator ligh ts when a call is received on that group
(Section 3.6.2).
HornEnabled, DisabledPrograms if the horn sounds when a call is received on that gro up (Section
3.6.4).
EncryptEnabled, DisabledPrograms if encryption is used on calls received and transmitted on that ID
code (Section 3.6.12).
Scan ListYes, NoPrograms if that group is scanned by the group scan feature (Section
3.4.7).
TranspondEnabled, DisabledPrograms if transponding occurs when a call is received on that group
(Section 3.8.3).
DataYes, NoPrograms if that group can be used for data transmissions (Section 3.6.11).
Repeater Channel
Number (Chn)
1-920 (800 MHz)
1-479 (900 MHz)
Programs the channel number of each of the repeaters at the site (Section
4.4.2). Channel numbers are shown in the table at the end of this section.
Ofst (Offset)Yes, NoPrograms if channels are offset 12.5 kHz on the low side. This can be pro-
grammed for channels 1-600 only (Section 4.4.2).
RICYes, NoPrograms if the repeater is equipped with a RIC drawer (Section 4.4.5).
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TRANSCEIVER PROGRAMMING
Table 4-4 Conventional System Parameters
ParameterAcceptable ResponsesDescription
Alpha TagAny keyboard characterChanges the 10-character alpha tag for the selected system. The system
alpha tag is used only for programming and is not displayed by the trans-
ceiver.
Channel Number1-920 (800 MHz)
1-479 (900 MHz)
OffsetYes, NoPrograms if the channel is offset 12.5 kHz on the low side. This is pro-
Alpha TagAny keyboard characterChanges the 10-character alpha tag for the selected system. The system
RICYes, NoPrograms if the repeater is equipped with RIC interconnect.
Scan ListYes , NoPrograms if the system is scanned (Section 3.4.6).
Group ScanEnabled, DisabledPrograms if group scanning occurs on the system (Section 3.4.7).
Emergency System/
Group; Auto
Any programmed system/
group; Auto = Yes or No
Power Level1, 2, 3, 4, 2WPrograms the output power selected by this system. The power output pro-
CompandingYes, NoPrograms if companding is us ed on the syst em (Section 1.5).
Talk-Around Allowed Yes, NoPrograms if talk-around can be programmed on any of the groups in that
Programs the channel number of that system. C hanne l num bers are s ho wn
in the table at the end of this section.
grammable for 800 MHz channels 1-600 only (Section 4.4.2).
alpha tag is used only for programming and is not displayed by the trans-
ceiver.
Programs the system/group on which emergency calls are made when the
emergency switch is pressed, if applicable. On conventional systems, auto-
matic transmission are not available, so “Auto” = “No” (Section 3.6.8).
duced by these numbers is set in the test mode (Section 3.6.10).
system (Section 3.9.4).
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Part No. 001-9750-007
TRANSCEIVER PROGRAMMING
Table 4-4 Conventional System Parame ters (Continued)
CONVENTIONAL GROUP PARAMETERS
(The Group Parameter screen is selected by pressing F6)
ParameterAcceptable ResponsesDescription
AsnYes, NoSpecifies if the group will be selectable.
Alpha TagA-Z, 0-9, etc.Specifies the 10-character alpha tag that is displayed when the group is
selected.
Tx CGN one, CG, DCG, IDCG,
EXT
CG = Tone (CTCSS), DCG = digital, IDCG = Inverted digital, EXT = External decoder (not supported)
CG ValueTone number or digital
code
Rx CGNone, CG, DCG, IDCG,
EXT
CG ValueTone number or digital
code
Send TO (Transmit
Yes, NoIf “yes” is programmed, the Call Guard turn-off code is sent when the PTT
Turn-Off Code)
Tal k-AroundYes, NoIf “yes” is programmed, transmission is on the receive frequency (Table
Call LightYes, NoPrograms if the Call indicator lights when a call is received on that group
HornYes, NoPrograms if the horn sounds when a call is received on that group (Section
EncryptionYes, NoPrograms if encryption is used on calls received and transmitted on that
Disable-BusyYes, NoPrograms if Transmit Disable On Busy feature is active on that group
Transmit DisableYes, NoPrograms if group is receive-only (Section 3.9.6).
Programs the type of transmit Call Guard squelch for the indicated group
(Section 3.6.2).
If CG was selected, the tone number from 1-38 is entered. If digital was
selected, the digital code is selected. These numbers are listed in Table 4-6.
Programs the type of Receive Call Guard squelch for the indicated group
(Section 3.6.2).
If CG was selected, the tone number from 1-38 is entered. If digital was
selected, the digital code is selected. These numbers are listed in Table 4-6.
switch is released (Section 3.6.2).
3.9.4). “NA” is displayed if ta lk-arou nd was disa bled on t he sy stem screen.
(Section 3.6.2).
3.6.4).
group (Section 3.6.12).
(Section 3.9.1).
4-24
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Part No. 001-9750-007
TRANSCEIVER PROGRAMMING
Table 4-4 Conventional System Parame ters (Continued)
ParameterAcceptable ResponsesDescription
Scan ListYes, NoPrograms if that group is scanned by the group scan feature (Sect ion
3.4.7).
DataYes, NoPrograms if that group can be used for data transmissions (Section 3.6.11)
Table 4-5 Create/Edit Bank Screen Parameters
ParameterAcceptable ResponsesDescription
Alpha TagA-Z, 0-9, etc.Changes the alpha tag for the selected bank.
Number of Systems in
Bank
Home System/ Group Any system /group in
Priority 1 System/
Group
Priority 2 System/
Group
Emergency System/
Group Default
Emergency Automatic Yes, NoPrograms if manual or automatic transmit occurs when the emergency
Fixed System/ Group
Transmit During Scan
---The number of systems that have been assigned to that bank. S ystems are
selected bank
Any conventional system/
group in selected bank
Any conventional system/
group in selected bank
Any system/group in the
current configuration file
Any system/group in
selected bank
assigned by pressing F6 (see Section 4.3.6).
Programs the system/group that is selected when the HOME key is pressed
(Section 3.5.11).
Programs the priority 1 system/group when priority group sampling is
used on conventional systems (Section 3.5.17).
Programs the priority 2 system/group (if used) when priority group sam-
pling is used on conventional systems (Section 3.5.17).
Programs the default system/group that is selected if no emergency sys-
tem/group is programmed in the selected system (Section 3.6.8).
switch is pressed on Multi-Net systems (Section 3.6.8).
If a system/group is entered, it has precedence over the Scan Revert Mode
parameter in the General Radio Parameters Screen when this bank is
selected. Transmissions in the scan mode then always occur on this system/group (Section 3.4.5).
Revised December 2000
4-25
Part No. 001-9750-007
TRANSCEIVER PROGRAMMING
Table 4-5 Create/Edit Bank Screen Parameters (Continued)
ParameterAcceptable ResponsesDescription
Data System/GroupAny system/group in
selected bank
Scan TypeMulti-Site or Single-Site Programs the type of scanning that occurs when the scan mode is selected
Wide Area Group
Tracking (MN only)
Start At HomeYes , NoIf “Yes” is programmed, the bank home system/group is always selected
Yes, NoIf “Y es” is programmed, the selected group does not chang e when registra-
Programs the default system/group that is selected for a data transmission
if the selected group is not programmed for data (Section 3.6.11).
(Section 3.4.2). This can also be changed by the u ser by the SCAN SELCT
menu item (Section 3.5.19).
tion occurs. If “No” is programmed, it changes to the last selected group of
the new system (Section 3.7.2).
when power is turned on or the bank is selected. If “No” is programmed,
the last selected system/group is always displayed (Section 3.5.11).
Table 4-6 Call Guard (CTCSS/DCS) Codes and Ton es
Recommended Tone Call Guard Codes
CodeFreqCodeFreqCodeFreqCodeFreqCodeFreq
0991.518123.027167.936*233.6
0167.01094.819127.328173.837*241.8
0271.911**97.420131.829179.938*250.3
0374.412100.021136.530186.239**69.3
0477.013103.522141.331192.840**206.5
0579.714107.223146.232203.541**229.1
0682.515110.924151.433210.742**254.1
0785.416114.825156.734*218.1
0888.517118.826162.235*225.7
* These tones normally are not used because of their close proximity to the voice frequencies
** This tone is normally not used because it may cause interference with adjacent tones.
NOTE: For more information on Multi-Net systems,
refer to the Multi-Net Application Note, Part No.
009-3039-003.
5.1.1 INTRODUCTION
The basic c omponents of a Multi-N et system are
shown in Figure 5-1. Because of the built-in adaptability of a Multi-Net system, one can be designed to
meet the communication needs of almost any type of
user. The following are some operating features that a
Multi-Net system can provide:
DATA LI NK
SYSTEM MANAGEMENT MODULE
1. Advanced features such as up to 8000 Unique ID
codes, automatic mobile identification, roaming,
and five levels of priority access are available if
Multi-Net sig naling is used.
2. Users of diffe rent types of radi o equipment can ta lk
to each other. For example, a mobile operating on a
Multi-Net 800 MHz channel c oul d t alk to a mobile
operating on a conventional UHF channel.
3. Wide ar ea ra di o coverage can be provided so that a
mobile could talk to another mobile that is using a
repeater that may be hundreds of miles away. That
repeater may be part of the same Multi - Net sys te m
USAGE ACCOUNTING SYSTEM
5-1
Revised February 1997
Part No. 001-9750-005
MULTI-NET SYSTEM OVERVIEW
or another Multi-Net system. Phone lines or some
other type of link can be used to provide a communication path.
Multi-Net systems are not restricted to a certain
type of signaling. For example, an entire Multi-Net
system could be des igned usin g conven tional c hannels
which use tone or digitally controlled squelch. The
various types of si gnaling can also be mixed in a
system. For example, there could be ten channels
using Multi-Net signaling, ten channels using LTR
signaling, and ten channels using conventional
signaling. Your E.F. Johnson representative can
provide more information on the capabilities of MultiNet systems.
The following information describes the MultiNet components shown in Figure 5-1.
5.1.2 MOBILE TRANSCEIVERS
The mobile and handheld transceivers used in a
Multi-Net system must be compatible with the typ e of
signaling being used (Multi-Net, LTR, or conventional) and also the frequency range of the system
(800 or 900 MHz). E.F. Johnson mobile transceivers
that can be programmed for Multi-Net signaling are
listed in Table 1-2. All Multi-Net transceivers are
triple mode which means that they can be
programmed for Multi-Net, LTR, and conventional
(non-trunked) operation. There are also many other
E.F. Johnson transceivers available that can be
programmed for LTR and/or conventional operation.
5.1.4 RADIO NETWORK TERMINAL (RNT)
The RNT along with the SMM (System Management Module) control the Multi-Net system. The
SMM is an IBM
®
PC or compatible computer that is
running Multi-Net software. This computer connects
to the RNT and is used by the system manager to
control the system. The SMM also cont inu ousl y moni tors RNT operation and maintains usage information
which can be monitored by the Usage Accounting
System. Such activiti es as dynami c rep rog ramming of
mobiles and disabling of lost or stolen mobiles are
also performed by the SMM.
A single RNT can control up to 30 repeaters
which is the maximum allowed by the FCC at one
site. The RNT is configure d with one Cha nnel Interface Module (CIM) for each repeater it controls and
an Intelligent Dispatch Module (IDM) for each E.F.
Johnson Dispatch Console. It also contains a Telephone Interface Modul e (TIM) for eac h tele phone li ne
used for interconnect calls and other modules.
5.1.5 DISPATCH CONSOLES
One or more E.F. Johnson Dispatch Consoles or
other consoles can be connected to the RNT using
direct connection, phone lines, or other types of links.
Depending on the capabilities of the particular
console, the dispat cher can perform such functions as
placing calls to specific mobiles, placing calls to other
dispatchers, patching mobiles together so th ey can talk
to each other, and monitoring status messages from
mobiles.
5.1.3 REPEATERS
The specific E.F. Johnson Summit® QX repeater
model that is used in a Multi-Net system is determined
by frequency range and desired RF power output.
Models are available for the 800 and 900 MHz
frequency ranges and with standard or high power
output. One repeater is required for each RF channel.
The Summit QX contains a main processor card
which controls signaling on that channel. This card
also allows the RNT to control the repeater. The
specific card that is used is determined by the type of
signaling used (Multi-Net, LTR, or conventional).
5.1.6 PUBLIC SWITCHED TELEPHONE
NETWORK (PSTN)
When telephone (interconnect) calls are placed
by transceivers, the RNT routes the call to the PSTN.
The specific transceiver s which can pla ce calls and
other interconnect parameters are controlled by the
system manager through the SMM and also by the
programming of the transceivers.
The option to route telephone calls through a
Private Automatic Branch Exchange (PABX) is available. The calling features of the PABX can then be
utilized.
Revised February 1997
5-2
Part No. 001-9750-005
MULTI-NET SYSTEM OVERVIEW
5.2 DEFINITIONS OF MULTI-NET TERMS
Conventional System - A type of radio system that is
licensed to operate on only a single channel. There is
no automati c access to several channels.
Home Repeater - All Multi-Net mobiles have one of
the site repeaters assigned as their “home” repeater.
When standard dispatch (group) calls are placed, the
home repeater and group ID code identify the mobile
or group of mobiles that receive the call.
Logic Trunked Radio (LTR) - This E.F. Johnson
radio system provides the bas is for the Multi-Ne t radio
system. Both LTR and Multi-Net systems utilize a
channel management concept called trunking (see
“Trunked Radio System” which follows). Logic
circuitry in the mobile transceivers and repeaters
controls trunking. It continually monitors the system
and generates data messag es which update the mobiles
and repeaters as to which repeaters are free and which
mobiles are receiving calls.
Mobile - This term refers to a transceiver mounted in a
vehicle but it can al so be applied to other types of
transceivers because they all operate basically the
same. The other types of tran sceive rs a re p ortab les and
control stations. A control station is essentially a
mobile transceiver u sed at a st ationar y locati on such a s
at an office site.
Monitor Repeater - This is the repeater that a mobile
is currently monitoring for update messages. This
repeater may be either the mobile's home repeater or
the site status repeater. When a mobil e i s not receiving
a call, it continually monitors the update messages for
incoming call and free repeater information. When
making a call, the mobile may be trunked to any of the
site repeaters that are not busy.
Multi-Net System - An advanced radio system which
provides enhanced operating features such as autoregistration (roaming), busy queuing, emergency
messages, and priority access. It utilizes trunking
similar to an LTR system.
Public Safety - A radio service used by the Local
Government, Police, Fire, Highway Maintenance,
Forestry Conservation, and Special Emergency Radio
services.
Radio Network Terminal (RNT) - The RNT together
with the System Management Module provide control
of a Multi-Net system. The RNT can interconnect
several different forms of communication to form a
communication network. Refer to Section 5.1.4 for
more information.
Selectable Group - Each selectable system can be
programmed with several selectable groups. Each
selectable group contains ID codes which specify the
mobile or group of mobiles being called, which calls
are received, and other call information (see Section
3.3.4).
Selectable System - This usually refers to one of the
systems selectable by the transceiver System Select
function. Each selectable system can be programmed
with a unique set of operating parameters such as
home repeater, group ID codes, and unique ID (see
Section 3.3.4).
Site - Repeaters that are physically located together
and connected to the same high-speed data bus.
Specialized Mobile Radio System (SMRS) - A
conventional or trunked radio system owned by an
entrepreneur who makes a profit by selling service on
the system. The entrepreneur is licensed for a base/
mobile relay faci lity and a ll users of mobiles or control
stations on his system are licensed as SMRS “users”.
The entrepreneur can also be licensed as a user on his
own system. An SMRS may provide service to any of
the radio services in the P ublic Safety and Industrial/
Land Transpor tation (PSIT) categori es. In addition, the
Federal Government and individuals may be licensed
to use an SMRS.
Status Repeater - One Multi-Net repeater at a site is
designated to transmit upda te inf or ma ti on for all call s
occurring at that sit e. This repea ter is als o available f or
voice traff ic, but is not assi gned as a home repeat er for
any mobiles because none of its mobiles would have
home channel backup (see Sections 5.3 and 5.4).
Trunked Radio System - A radio system which
utilizes multip le r adio channels and automatic channel
switching to allow all system uses to access any
channel that is not in use. This results in minimum
waiting to make a call and maximum utilization of
system channels.
5-3
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Part No. 001-9750-005
MULTI-NET SYSTEM OVERVIEW
5.3 HOME AND STATUS REPEATERS
When a mobile transceiver is programmed, it is
assigned “home” and “status” repeaters. The status
repeater is used by a mobile as its primary source of
incoming call and free repeater information. When a
mobile is not receiving a call, it is continually monitoring its status or home repeater for this information.
In addition, the home repeater and group ID code are
used to identif y mo bil es when standard group calls are
placed.
One repeater at a site is designated as the status
repeater. This repeater transmits update information
for all calls occ urrin g at that site . The stat us repe ater is
also available for voice traffic, but is usually not
assigned as a home repeater for any mobiles. The
reason for this is that mobiles assigned to the status
repeater would not have home channel backup.
However, no degradation in system calling efficiency
occurs if this is done.
The status repeater transmits continuous update
messages at all ti mes. A home repeater transmits
continuous update messages when it is in use or if any
of its mobiles are trunked out to another repeater.
During idle times, non-st atus repe aters tr ansmit updat e
messages every 10 seconds. Therefore, a mobile just
coming into se rvice quickly receives inf ormation as to
which channel to use.
If the home repeater is being monitored and it is
not busy, it is used to make a call. Otherwise, the
transceiver may be trunked to any repeater at the site
to make a call. The repeater to which a mobile is
trunked is selected randomly.
Group ID codes 1-225 are assignable on each
home repeater for standard dispatch calls. For
example, if the system has ten channels, up to 2250
different group ID codes can be assigned. Group ID
codes specify the specific mobile or group of mobiles
being called and the mobile or group of mobiles from
which calls are received.
5.4 HOME CHANNEL BACKUP
5.4.1 INTRODUCTION
If mobiles were limited to just their home
repeater to receive update information and that
repeater became inoperative, all the mobiles assigned
to that home repeater would not be able to place or
receive calls. To prevent this fro m happeni ng, each site
utilizing Multi-Net signaling has a repeater called a
status repeater whi ch transmi ts update messages f or all
calls occurring at the site. All mobiles assigned to the
site can receive update message s fr om either th e status
or home repeater. Therefore, if a home repeater fails,
the status repeater can still be monitored for the information needed to place and receive calls.
5.4.2 SELECTING REPEATER TO MONITOR
Each selectable Multi-Net system of a mobile is
programmed with the channel numbers of the status
and home repeaters. Wh en t ran sce iv er power is turned
on, it checks the status repeater. If valid data is
detected, that r epeater becomes the monit or repe ater. If
valid data is not detected, the home repeater is monitored. The monitor repeater does not change unless
valid data is no longer detected or a system
programmed for a different site is selected. Transceiver performance is not a ffe cted by which r epeater i s
being monitored.
5.4.3 ASSIGNING THE STATUS CHANNEL
Each selectable system of a mobile is
programmed with a status channe l and also the number
of the site that is accessed by that system. For proper
mobile operation, the same status channel must be
programmed in all systems which access that site. For
example, if systems 1, 3, and 4 access site 128, those
systems must be programmed with the same status
channel.
5.4.4 DETECTING DEFECTIVE REPEATERS
If a repeater is defectiv e, it is impor tant that it is
taken off the air as quickly as possible to ensure that
all transceivers ar e receiving quality service. To detect
improper operation, calls can be periodically placed
through an optional test mobile by the System
Analyzer. A test mobile is simply a transceiver located
off-site that has attenuated power output.
These calls use the Interrogate special call
described in Section 5.8.4 , and they are p laced thro ugh
each repeater in the site. This call exercises the
repeater RF receive , RF transmi t, and log ic circuit ry. If
the proper response is not received from the repeater
5-4
Revised February 1997
Part No. 001-9750-005
MULTI-NET SYSTEM OVERVIEW
by the RNT, the SMM alerts the system operator. The
faulty repeater may then be automatically or manually
shut down by the SMM.
5.5 MOBILE-REPEATER DATA SIGNALING
The setup and control of a call is performed by
exchanging data messages between the mobile and
repeater. This data signaling occurs continuously with
voice because it is at the subaudible frequency of 150
Hz. This allows operat ion without a dedicated control
channel. Therefore, all channels can be used for voice
communication.
When a mobile initiates a call, a data “handshake” occ urs with the repeater. This hands hake
occurs in only half a second, and it tells the mobile
that the system has been su ccessfully ac cessed and that
the signal is not occurring on the wrong channel
because of intermodulation. One advantage of using a
handshake to access a channel is that it prevents a
mobile with a stro nger sig nal f rom cap turi ng a chan nel
in use.
Data messages are c ontinuously transmitted to the
repeater by the calling mobile while a conversation is
in progress. A repeater is held for only the duration of
the transmission with st andard dispatch (mobile-tomobile) calls. Some special calls, such as telephone
and unique ID, hold the repe ater for t he dur ation of th e
call.
If it is a home repeater, these messages are for its
assigned mobiles that are being trunked to other
repeaters. If it is the status repeater, messages to all
mobiles currently using the site are tr ansmitted. If it
has assigned mobiles, this includes messages to those
mobiles. For example, assume that five different transceivers are making ca lls. If all ha ve Rep eater 1 as thei r
home repeater , the data message order on Repeater 1 is
as follows: 1 2 3 1 4 5 1 2 3 and so on. Therefore, in
this case, the maximum number of data messages that
would occur before repeating is six.
The calls that can be placed and received are
determined by the ID codes programmed into the
transceiver by the system operator. Therefore, other
users in the system c annot eavesdrop on conversations
of other groups. Although traffic can be monitored by
a receiver tuned to the channels being used, that may
even be diff icult beca use a c omplete conver sati on may
include several exchanges occurring on various channels.
Since Multi-Net and LTR signaling is different ,
the mobile must be programmed for the type of
signaling being used. For example, if the sele cta bl e
system of the mobile is programmed for Multi-Net
operation, it cannot be selected to place calls on an
LTR system and vice versa. However, since all curr ent
Multi-Net transceivers can be program med for MultiNet, LTR, and conventional operation, all the user has
to do to place a different type of call is select another
system.
When a mobile is trunked to another repeater to
receive a call, addi tional da ta messages are transmitt ed
continuously by that mobile 's home repeater, the status
repeater (see Section 5.4), and the repeater to which
the mobile was trunked. The messages on the home
and status repeaters tell mobiles just coming into
service which repeater to switch to in order to receive
the call. Messages on the repeater being used by the
transceiver keep it updated on what calls are being
received by other mobiles assigned to its home
repeater. Therefore, calls with a higher receive priori ty
are not missed even when trunked to another repeater.
The sequence of data messages transmitted on a
home or status repeater follows: Every third data
message is the message to the mobile using that
repeater. Then alternating between those messages are
the messages to the other mobiles receiving calls.
5.6 REPEATER DATA BUS SIGNALING
A single-line, high-speed serial data bus interconnects the control logic of the repeaters at a site.
Control information is exchanged between repeaters
via this bus. Repeaters in a Multi-Net system utilize a
logic control technique called distributive processi ng
in which the logic of each repeater performs all the
control functions on that channel. This eliminates the
need for a separate controller at each site.
When a repeater is in use, it places information
on this data bus which includes the home repeater
number and the group and unique ID code of the
mobile using the channel. This information is monitored by the other repeaters at the site so that they can
determine which repeaters are free and also if any of
their assigned mobiles are trunked to other repeaters.
Revised February 1997
5-5
Part No. 001-9750-005
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