LBI-31932E
Mobile Communications
Maintenance Manual
Printed in U.S.A.
MVS
SYNTHESIZED MOBILE RADIO
403-512 MHz, 25 WATT MOBILE
COMBINATION
TABLE OF CONTENTS
RF BOARD . . . . . . . . . . . . . . . . . . . . . . . . . LBI-38258
PA BOARD . . . . . . . . . . . . . . . . . . . . . . . . . LBI-31934
AUDIO BOARD . . . . . . . . . . . . . . . . . . . . . . LBI-31922
LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . . LBI-38899
SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . LBI-31924
FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . . . LBI-38387
SERVICE SECTION . . . . . . . . . . . . . . . . . . . . LBI-38292
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TABLE OF CONTENTS
Page
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
COMBINATION NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
EQUIPMENT AND FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
A VAILABLE OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Two Channel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
16/128 Channel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SCAN OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Receiver Scan Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
To Program Scan Channels & Select Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Using Radio With Scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PC PROGRAMMING SCAN OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DETAILED SCAN OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PUBLIC ADDRESS OPTION OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
TYPE 99 OPTION OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DETAILED TYPE 99 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
MECHANICAL PARTS BREAKDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
INTERCONNECTION DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SPECIFICATIONS
*
SYSTEM
RADIO TYPE MVS
Frequency Range:
Transmit and Receive 403-440 MHz (Low Split)
440-470 MHz (Mid Split)
470-512 MHz (High Split)
Frequency Separation
Transmit Full Power over entire split
Receive 20 MHz
V olta g e 13.8 Vdc ± 20%
Battery Drain:
Receiver (13.8 Vdc)
Off 0.01 Amperes (maximum)
Squelched 0.65 Amperes (maximum)
Unsquelched 1.00 Amperes (maximum at 3 Watts audio)
Transmitter (13.6 Vdc) 8.0 Amperes (maximum at 25 Watts RF)
Frequency Stability ±5ppm (±2.5 ppm optional)
Channel Spacing 25kHz
Frequency Capacity 2, 16, or 128 Channels
Temperature Range -30°C (-22°F) to +60°C (+140°F)
Duty Cycle 100% Receive, 20% Transmit (EIA Duty Cycle)
Dimensions
(Less Accessories) (Fits a DIN size dash opening)
Height 54.Smm (2.15 inches)(body)/62.Smm (2.46 inches)(nose)
Width 181.Smm (7.15 inches)
Depth 216mm (8.5 inches)
Weight
(Less Accessories) 2.04 kg (4.5 pounds)
Military Specifications
METHOD/PROCEDURES
STANDARD MIL-STD-810-C MIL-STD-810-D
LowPressure
High Temperature
Low Temperature
Temperature Shock
Solar Radiation
Humidity
Vibration
Shock
500.1/Procedure 1
501.1/Procedure 1,2
502. 1/Procedure 1
503.1/Procedure 1
505.1/Procedure 1
507.1/Procedure 2
514.2/Procedure 8,10
516.2/Procedure 1,2,3,5
500.2/Procedure 1
501.2/Procedure 1,2
502.2/Procedure 1,2
503.2/Procedure 1
505.2/Procedure 1
507.2/Procedure 2
514.3/Procedure 1
516.3/Procedure 1,3,4,5,6
(Cont’d)
Copyright© April 1988, General Electric Company
LBI-31932
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TRANSMITTER
Power Output 25 Watts
Conducted Spurious 60 dB Below Carrier (typical)
Modulation ±5.0 kHz (maximum)
Audio Sensitivity 40 millivolts (typical)
Audio Frequency
Characteristics (Per RS-I52B)
Within +1 to -3dB o f 6 dB / oc ta ve pre-emphasis from 300
Hz to 3000 Hz per EIA standards. Post limiter filter per FCC
and EIA.
FMNoise -50dB (typical, companion receiver method)
Power Adjust Range 12.5 to 25 watts
Distortion 2% (typical)
Deviation Symmetry 0.1kHz (typical)
RF Output Impedance 50 ohms
Carrier Attack T ime 50 milliseconds (maximum)
Audio Attack Time 50 milliseconds (maximum)
RECEIVER
Audio Ampl Output 3 Watts (less than 5% distortion) EIA
(4-ohm speaker)
Sensitivity:
12 dB SINAD (EIA method) -119 dBm (0.25 microvolts) (typical)
Selectivity
(EIA two-signal method) -80dB
+25 kHz (typical)
Spurious Response -85dB (typical)
Intermodulation -78dB typical (12 dB SINAD)
Hum and Noise:
Squelched -80dB (typical)
Unsquelched -50dB (typical)
Modulation Acceptance ±7kHz
Frequency Response Within +2.0 and -8dB of a standard 6 dB/octave deemphasis
curve from 300 to 3000 Hz EIA.
RF Input Impedance 50 ohms
Receiver Attac k Time 40 milliseconds, typic al @ 8 dB SINAD
100 milliseconds, maximum
Receiver Recovery Time 100 milliseconds, typical @ 8 dB SINAD
250 milliseconds, maximum
*Refer to the appropriate Specification Sheet for the complete specifications.
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GENERAL DESCRIPTION
The MVS mobile radio is a synthesized, wideband radio,
utilizing microcomputer technology to provide high reliability,
high quality, and high performance in two-way, FM, mobile
communications. The MVS provides 25 watts of RF output
power across each band split (403-440 MHz, 440-470 MHz,
and 470-512 MHz) without retuning. The receiver can cover
any 20 MHz segmen t of e a c h b a nd s p l i t wi t h o u t re tu n in g .
The MVS radio is easy to operate with large buttons for
function selection and an easily viewed liquid crystal display
(LCD). The control panel and the LCD are backlighted for
night operation.
All radio functions are stored in a programmable electrically erasable PROM (EEPROM). Channel selection, volume
setting, scan channels, and scan on-of f functio n are all pe rmanently remembered even when the 12 V batter y is disconnected .
Seven interchangeable control panels are available for upgrading and adding options to the radio. The plug in control
panel modules can provide 2 channels, 16 or 128 channels with
scan, Type 99 decoding, and Public Address.
The radio is normally mounted in a conventional configuration with the entire unit under the dash or in a DIN size opening inside the dash. A remote mount option allows controlling
the main radio assembly remotely from the Front Cap Assembly.
The receiver is able to scan on both n o ise squelch operation
and Channel Guard (tone or digital). The scan rate is fast, requiring only I5ms per channel (66 channels/second). A 16
channel radio will scan the priority channels ever 90ms (11
times/sec) and the non-priority channels every 330ms (3
times/sec). The scan time will be faster when fewer channels
are programmed into the scan memory.
The microphone is equipped with a Channel Guard hookswitch which disables Channel Guard whenever the microphone is removed from its holder.
The radio is programmed using an IBM compatible personal computer equipped with a RS-232 serial interface connector. A EGE supplied RS-232 interface box and cable are
also required. The computer can program or reprogram the
customer frequencies, Channel Guard, carrier control timer,
and other programmable customer options. Programming is
done through the microphone jack without opening the radio.
A temperature compensated oscillator module provides
±0.0005% (5 PPM) oscillator stability. An optional ±0.0 0025%
(2.5 PPM) high stability oscillator is available.
The MVS radio consists of the following assemblies:
• RF Board
• PA Board
• Audio Board
• Logic Board
• System Board
• Front Cap Assembly
The boards are all mounted onto a main casting assembly
with easy access to each for servicing. Interconnect plugs and
ribbon cables are used to interconnect the boards eliminating
problems with pinched wires when replacing covers.
RF BOARD
The RF Board includes the synthesizer, the transmitter, and
the receiver circuits.
Synthesizer Circuit
The synthesizer generates all transmit and receive RF frequencies. The synthesizer frequency is controlled by the microprocessor located on the Logic Board. Frequency stability is
maintained by a temperature compensated reference oscillator
module. Transmit audio, which is processed on the Audio
Board, feeds the synthesizer to modulate the VCO. The VCO
output frequency is doubled and drives both the transmitter exciter and the receiver mixer.
Transmitter Circuit
The transmitter consists of a fixed-tuned exciter module, a
PA module, a power control circuit, a PIN diode antenna
switch, and a low pass filter.
The PA module is capable of 10 Watts output to drive the
PA Board. The power control circuit contro ls t h e PA module by
sampling the PA Board output to maintain constant output
power across the band.
The RF output level is inte rnally adjustable for rated power.
A thermistor in the control protects the PA from overheating.
Receiver Circuit
The dual conversion receiver circuit consists of a front end
section, 45 MHz first IF, a 455 kHz second IF, and a FM d et ector. All audio processing and squelch functions are accomplished on the Audio Board.
PA BOARD
The PA Board amplifies the RF Board PA module output
to the rated output of 25 Watts. The 25 Watt output is fed
back to the RF Board where the power control circuit, the
antenna switch, and the low pass filter are located.
AUDIO BOARD
The Audio Board provides all audio and tone processing
for the receiver and transmitter, except the receiver volume
control and 3 watt audio PA. The board also contains the internally adjustable receiver squelch circuit. The Au dio B oard
obtains all control signals from the Logic Board.
LOGIC BOARD
The Logic Board contains the microprocessor and associated memory circuits which include an EPROM for controlling the processor and a programmable "personality"
electrically erasable PROM (EEPROM) to store customer
frequencies, tones, and options. The microprocessor provides tone generation and detection, frequency data to the
synthesizer, and sends and receives data to another microprocessor in the front cap assembly for the LCD display and
the control panel commands.
SYSTEM BOARD
The System Board controls the main input power to the
radio. The front panel POWER switch and the IGNITION
SENSE input lead provide the necessary signals to the
MOSFET switching circuit.
The board also interfaces all option connections from the
internal boards in the radio with the optional items outside of
the radio. All options that apply to the radio, interconnect to
the System Board through the back of the radio using an optional cable.
FRONT CAP ASSEMBLY
The Front Cap Assembly contains the Control Board,
Control Panel, LCD Assembly, and houses the internal
speaker.
The Control Board contains a microprocessor which interfaces the control panel keyboard and a LCD module to
two serial data lines for communication with the main radio
microprocessor on the Logic Board. The Control Board also
contains a digital volume control and a 3 watt audio power
amplifier.
EQUIPMENT AND FEATURES
MICROPHONE
The standard mobile combinations use a transistorized
dynamic microphone with an internal Channel Guard hookswitch. The microphone is housed in a sturdy case, and the
extendable coiled cord plugs into a jack on the bottom of t h e
radio. The microphone is secured to the radio by a cable
clamp. A magnetic microphone hanger is supplied with the
microphone. The Channel Guard is disabled when the microphone is removed from the magnetic hanger allowing the
operator to monitor the channel before sending a message.
Optional DTMF and desk microphones are av aila ble.
CARRIER CONTROL TIMER (CCT)
The Carrier Control Timer turns off the transmitter after
the microphone push-to-talk (PTT) switch has been keyed
for a pre-programmed time period. A pulsing alert tone will
warn the operator to unkey and then rekey the PTT to continue the transmission. The timer can be programmed to time
out for 30 seconds to 7.5 minutes in 30 second increments.
The timer can be enabled or disabled for ea ch c h annel .
CHANNEL GUARD
Channel Guard provides a means of restricting calls to
specific radios through the use of a continuous tone coded
squelch system (CTCSS) or a continuous digital coded
squelch system (CDCSS). Tone frequencies range from 67.0
Hz to 210.7 Hz in 0.1 Hz steps. There are 83 standard programmable digital codes. The Channel Guard tone frequencies and codes are software programmable. Both tone
frequencies and digital codes may be mixed on each channel. These codes and frequencies are listed in Table 1.
SQUELCH TA IL ELIMINATION (STE)
STE is used with tone and digital Channel Guard to
eliminate squelch tails. The STE burst is transmitted when
the microphone PTT is released. The receiving radio decodes the burst and mutes the receiver audio for 250ms. T his
mute time allows the transmission to end and to mute the
squelch tail. The radio looks for STE on the received signal
when the microphone is either on or off hook. The STE is
enabled for transmit and/or receive by PC programming the
radio’s personality.
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AV AILABLE OPTIONS
CONTROL PANELS
The Control Panel plugs into the Front Cap Assembly and
determines the number of channels (2 without scan, 16 or 128
with scan), the Type 99 decode option, or the Public Address
option.
The panel is made of highly durable plastic with rounded
corners and recessed controls for passenger safety requirements.
There are 7 different optional interchangeable control panels available:
• Option CP01 2 Channel (19B801450P1)
• Option CP02 2 Channel
• with Type 99 decode (19B801450P2)
• Option CP03 16 Channel
• with scan (19B801450P3)
• Option CP04 16 Channel
• with scan and Public Address (19B801450P4)
• Option CP05 128 Channel
• with scan (19B801450P5)
• Option CP06 2 Channel
• with Public Address (19B801450P6)
• Option CP07 16 Channel
• with scan and Type 99 decode (19B801450P7)
The Public Address Control Panels include a relay
(19C851585P6) for automatic switching of the public address
audio to an external speaker. The 128 channel Control Panel
includes a larger memory EEPROM to replace U704 on the
Logic Board. Refer to the Instal lation Manual.
PC PROGRAMMING OPTIONS
The radio is programmed using an IBM compatible personal computer equipped with a RS-232 connector. Option
TQ3310 provides the RS-232 serial interface unit and the c a bl e
between the PC and the unit. (An auxiliary power supply for
the unit is also included which is not needed to program the
MVS.) Option TQ3315 provides the MVS programming cable
between the PC interface unit and the MVS microphone jack.
Option TQ3318 provides the MVS programming software to
run on the PC.
NOISE SUPPRESSION KIT OPTION
Noise Suppression Kit Option PD01 (19A148539G1) is
available for installations where excessive alternator or electri-
cal noises present on the power c a bl e do not permit the radio to
operate properly. Refer to the interconnect diagram.
AC POWER SUPPLY OPTIONS
To use the radio as a base station, Option PS01
(19A704647P2) 121 Volt AC, 60 Hertz, 13A power supply is
available. The standard nine foot power cable supplied with the
radio is connected to the mating connector on the power supply. In addition, Option PS02 (19A704647P3) 120/240 Volt
AC, 50/60 Hz, 13A supply is also available where its use is
dictated. DC remote control may be provided with either supply.
OPTION CABLE
Option Cable Option CC01 (19C851585P3) is used to
bring all option connections from the System Board through
the back of the radio to the outside. This cable is required with
all external options.
UNIVERSAL TONE CABLE
Universal Tone Cable Option CC02 (19C851585P5)
equipped with a 9-pin Winchester connector is required when
an external tone encoder or decoder is used. The tone cable interconnects the tone encoder/decoder with the radio through
the option cable Option CC01. Refer to the installation diagrams in this manual for jumper modifications. A second "Y"
cable is required when both encode and decode functions are
used (Option CC04).
POWER CABLE
20 foot power cable Option CC03 (19B801358P4) is available for installations requiring more than the standard 9 foot
cable.
EXTERNAL SPEAKER OPTIONS
The external speaker options provide a five inch speaker in
a LEXAN housing. Option LS0I (19C850550G10) provides a
dash mount and Option LS02 (19C850550G11) provides a
window mount. The radio’s 3 watt amplifier drives the
speaker’s 3.2 ohm impedance. The speaker leads are connected
to pins 2 and 9 of option cable Option CC01. When the External Speaker is used, refer to the Installation Instructions and
Interconnection diagram for jumper modificati ons.
TABLE 1
TONE & DIGITAL CHANNEL GUARD
TONE CG DIG. CG DIG. CG DIG. CG
No. CG
67.0
71.9
74.4
77.0
79.7
82.5
85.4
88.5
91.5
94.8
97.4
100.0
103.5
107.2
110.9
114.8
118.8
123.0
127.3
131.8
136.5
141.3
146.2
151.4
156.7
162.2
167.9
173.8
179.9
186.2
192.8
203.5
210.7
023
025
026
031
032
043
047
051
054
065
071
072
073
074
114
115
116
125
131
132
134
143
152
155
156
162
165
172
174
205
223
226
243
244
245
251
261
263
265
271
306
311
315
331
343
346
351
364
365
371
411
412
413
423
431
432
445
464
465
466
503
506
516
532
546
565
606
612
624
627
631
632
654
662
664
703
712
723
731
732
734
743
754
036*
053*
122*
145*
212*
225*
246*
252*
255*
266*
274*
325*
332*
356*
446*
452*
454*
455*
462*
523*
526*
*Codes Unique to Ericsson GE
To reverse t he p olar ity of the digital Channel Gua rd c od es, t yp e I ("inv erted") before the code number, i.e. I023.
NOTE
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EXTERNAL ALARM FOR T-99
External Alarm Relay Option SU01 (19A705499P1) is
used with the Type 99 Control Panel options. The relay requires External Alarm ON/OFF switch Option SU02
(19C851585P7) and connects to pin 13 of option cable Option
CC01. The relay can sound the vehicle horn when a Type 99
call is received. The alarm switch is used to turn the horn relay
on or off.
PUBLIC ADDRESS RELA Y
The Public Address Relay switch (19C851585P6) is supplied with the Public Address Control Panel Option and requires an external speaker and option cable Option CC01. The
relay provides automatic switching of the public address audio
to an external speaker when the microphone is keyed. Also, a
switch on th e relay allows selectin g the receive r audio to feed
either the internal speaker or the external speaker. The relay
may be ordered separately from the PA Control Panels as Option SU03 for use as an internal/external speaker switch.The
public address relay connects to P2 of the option cable .
REMOTE MOUNT
Remote mount Option CB01 (19A705306G1 & G2) allows
controlling the main radio assembly remotely from the Front
Cap Assembly. The Front Cap is removed from the main radio
assembly and mounted to a rear housing containing an interface board (supplied with the option). A new front cap (without
any controls or displays) containing an interface board is
mounted to the radio assembly. A system cable (normally 18
feet supplied) is used between the two units. A 20 foot power
cable is also supplied for the radio assembly.
DC REMOTE CONTROL OPTION
The DC Remote Control Board Option CY01
(19A704686P7) is used to interface with a remote control console and mounts inside the AC Power Supply Option. The
board provides remote single frequency transmit and receive
and Channel Guard disable control. The board connects to P2
of the option cable Op ti o n CC 0 l.
SERVICE OPTIONS
Test Point Adapter Box Op tion TQ 2370 (19 B801494P1) allows receive audio monitoring and transmit audio injection
without opening the radio. The adapter connects between the
microphone and the radio, providing test points for all 10 pins
of the microphone connector.
Service Cable 19A704875P1 provides an extension between the Audio Board and the Logic Board. Both sides of the
Audio Board are available for servicing using the ca ble.
Service cable 19B801348P4 provides a 2 foot extension
between the 9 pin "D" connectors (J701 and P701) on the
Logic Board and Control Board. The Front Cap Assembly may
be serviced using this cable.
To allow easier servicing of the Front Cap Assembly,service cable 19A705235P2 provides a longer ribbon cable (2 feet)
between the System Board and the Control Board connectors
J902 and J901. This longer cable is not required for most serving. The radio’s ribbon cable is usually adequate in length if
the cable is not looped through the front of the radio’s as sembly.
OPERATION
This section provides a description of the Control and indicator functions. The section is divided into two subsections: 2
Channel Operation, and 16/128 Channel Operation. Complete
operating instructions for the radio are provided in the Operator’s Manual.
TWO CHANNEL OPERATION
CONTROLS
POWER
A momentary type switch to turn the radio on or off. Press
once to turn the radio on; press again to turn the radio off.
Power ON is indicated by all indicators on the LCD being activated momentarily, and then a channel number being displayed.
VOLUME
Momentary type switches to adjust the volume. Press and
hold the (up arrow) to increase the volume. Press and hold
the (down arrow) to decrease the volume. While on an inactive channel, beeps are heard while adjusting the volume. No
beeps are heard while listening to an active channel.
MONITOR (MON)
A momentary type switch to allow monitoring of the selected channel before transmitting a message. It disables
Channel Guard and squelch and will allow audio noise if the
channel i s not busy. This may be conveni ent when set ting
the volume to the desired level.
CHANNEL
Two push type switches. Press Channel 1 to select channel
1; press Channel 2 to select channel 2. The channel number
wili be shown on the display .
INDICATO RS
CHANNEL DISPLAY
Displays the current operating channel.
BUSY (BSY)
Illuminates if the channel displayed is in use.
TRANSMIT
Illuminates whenever the Push-To-Talk (PTT) button is
pressed. Goes out when it is released.
VOLUME INDICATOR
Functions as a bar graph to indicate relative volume lev el. A s
the volume is increased, more segments are illuminated.
OPTION (OPT)
Illuminates whenever an option is turned on.
16/128 CHANNEL OPERATION
CONTROLS
POWER
A momentary type switch to turn the radio on or off. Press
once to turn the radio on; press again to turn the radio off.
Power ON is indicated by all indicators on the LCD being
activated momentarily and then a channel number being displayed.
VOLUME
Momentary type switches to adjust the volume. Press and
hold the (up arrow) to increase the volume. Press and hold
the (down arrow) to decrease the volume. While on an inactive channel, beeps are heard while adjusting the volume. No
beeps are heard while listening to an active channel.
MONITOR (MON)
A momentary type switch to allow monitoring of the displayed channel before transmitting a message. It disables
Channel Guard and squelch and will allow audio noise if the
channel is busy. This may be convenient when setting the
volume to the desired level.
TX
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CHANNEL
Two push type switches. Press CHANNEL (up arrow) to increase the channel number; press CHANNEL (down arrow)
to decrease the channel number. The channel number will be
shown on the display. Unprogrammed channels will be
skipped.
SCAN
A momentary type switch to turn the scan function on or off.
When used in conjunction with the CHANNEL switch it enables the ADD/DELETE Function to allow the scan list to be
modified. When turned on, the display will show "SCN" in
the lower center portion of the display.
MODE
A momentary type switch used in the 128 channel models
only. These models can contain up to 8 modes with each
mode containing up to 16 channels. When the switch is
pressed once, the operating mode will increment one mode.
If continuous pressure is applied, the mode will increment to
mode 8 then back to mode 1. Unprogrammed modes will be
skipped.
INDICATORS
CHANNEL DISPLAY
Displays the current operating channel. In scan operation,when a carrier is detected on a channel, that channel is
displayed.
PRIORITY 1 (P1)
Illuminates when the channel displayed is a Priority 1 scan
channel.
PRIORITY 2 (P2)
Illuminates when the channel displayed is a Priority 2 scan
channel.
(S)
Illuminates when the channel displayed is a non-priority
scan channel.
SCAN (SCN)
Illuminates when the scan function is activated. Blinks when
the microphone is off-hook to indicate the radio has stopped
scanning.
BUSY (BSY)
Illuminates if the channel displayed is in use.
TRANSMIT
Illuminates whenever the Push-To-Talk (PTT) button is
pressed. Goes out when it is released.
VOLUME INDICATOR
Functions as a bar graph to indicate relative volume lev el. A s
the volume is increased, more segments are illuminated.
MODE DISPLAY
Displays the current mode in a 128 channel radio.
OPTION (OPT)
Illuminates whenever an option is turned on.
SCAN OPERATION
The SCAN function allows monitoring of up to 16 receive channels. The scanned channels may be any frequency
within the frequency band limits of the radio and may be
Channel Guard protected (tone or digital). All scan functions
are retained in memory, even if the 12 Volt battery is disconnected.
Any channel may be scanned with or without a priority
level. One channel may be programmed for Priority 1 (P1)
and another for Priority 2 (P2) with any or all remaining channels programmed as non-priorities.
When using the scan function with a 128 channel radio, the
scan function works on a per mode basis. Only the current operating mode will be scanned. Scan must be turned off before
changing modes.
RECEIVER SCAN RATE
The scan rate for the radio will vary depending upon the
number of channels programmed into the scan list and whether
or not Channel Guard is programmed. When scanning 16 inactive channels, the priority channels are sampled 11 times/second and the non-priority channels 3 times/second. The scan
rate will be faster when fewer channels are programmed into
scan memory.
Scan operation will be determined by the following conditions:
• PRIORITY 1, PRIORITY 2 AND NON-PRIORITY
PROGRAMMED
The Priority 1, Priority 2 and up to 14 remaining channels
will be scanned. Once a carrier is detected (and if programmed
the correct Channel Guard is decoded), the LCD display will
indicate that channel. Sampling of the Priority 1 and Priority 2
channels continues while receiving a message. Should a Priority 1 or 2 channel carrier (and correct Channel Guard) be detected while a non-priority channel is being received, the
applicable indicator, P1 or P2 lights, and the channel is
switched to the Priority 1 or 2 channel regardless of what is being received on the non-priority channel.
• NON-PRIORITY PROGRAMMED
Up to 16 non-priority channels may be scanned. Once a
carrier is detected (or correct Channel Guard is decoded) the
digital display will indicate the channel. Scan will stop and remain on the channel until the carrier disappears; after a few
seconds scanning resumes. The channels are scanned in descending order.
TO PROGRAM SCAN CHANNELS AND
SELECT PRIORITY
The selection of scan channels and priority is front panel
programmable using the SCAN switch in conjunction with the
CHANNEL UP and DOWN switches.
NON-PRIORITY (S)
1. Confirm that the radio is turned on. If not press the
POWER switch.
2. If SCAN indicator is lit, press and release the SCAN switch
to disable scan function.
3. Select the desired channel using the CHANNEL UP and
DOWN switch.
4. Press and hold the SCAN switch, then press the CHANNEL UP switch once to add the channel to the scan list.
The S indicator will be shown in the display to indicat e t ha t
the channel is now in the scan program.
5. Release SCAN switch.
6. Repeat steps 2 through 5 for each channel (up to 16) to be
added to the scan list.
PRIORITY 2 (P2)
1. With scan off, select the desired P2 channel.
2. Press and hold SCAN switch; then press the CHANNEL
UP switch twice. The displayed channel will now become
the Priority 2 channel and the P2 indicator will light to indicate that the channel is now in the scan list as priority 2.
3. Release the SCAN switch.
PRIORITY I (PI)
The Priority 1 channel may be added to the scan list by one of
three methods by PC programming the radio’s personality.
Normally P1 is added using the front control panel (Method 1).
• Method 1: FRONT PROGRAMMABLE
1. With scan off, select the desired PI channel.
2. Press and hold SCAN switch; then press the CHAN-
NEL UP switch three times. The displayed channel will
now become the Priority 1 channel and the P1 indicator
will light to indicate that the channel is now in the scan
list as priority 1.
3. Release the SCAN switch.
• Method 2: FIXED P1 OPTION
The P1 channel is PC programmed into the radio’s personality.
• Method 3: SELECTED CHANNEL OPTION
This option is PC programmed into the radio’s personality. Each time the scan function is turned on by pushing the SCAN switch, the Pl channel becomes the
channel in the display (the SELECTED channel).
TX
A previous channel with priority will become a non-priority scan channel when a new priority channel is programmed.
NOTE
LBI-31932
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DELETE SCAN CHANNEL (S,P1,P2)
1. Confirm that the radio is on. If not, press the power switch.
2. If SCN indicator is lit, press and release SCAN switch to
disable scan function.
3. Select the desired channel to be removed from the scan list
using the CHANNEL UP or DOWN switches.
4. Press and hold SCAN switch; then press the CHANNEL
DOWN switch once. This removes the selected channel
from the scan list. All scan indicator (S,P1,P2 and SCN)
will be off.
5. Release SCAN switch.
6. Repeat preceding Steps 2 thru 5 for each channel to be removed from the scan list.
REVIEWING THE SCAN LIST
1. Confirm that the radio is turned on. If not, press the
POWER switch.
2. If SCAN indicator is lit, press and release SCAN switch to
disable scan function.
3. Select each channel (one at a time) using the CHANNEL
UP or DOWN switch and confirm c ha nnels inc lu d ed on the
scan list. The scan indicators (S, P1, P2) will light for each
channel programmed.
USING THE RADIO WITH SCAN
THE SELECTED CHANNEL
The SELECTED channel is the channel in the display
when scan is turned on by pushing the SCAN switch. When a
signal is
not being received, the radio reverts to this channel
for transmitting. When a signal
is being received, the radio can
be PC programmed to either revert to the SELECTED channel
or remain on the received channel.
The SELECTED channel does not necessa ril y have t o be a
channel in the scan list. The SELECTED channel will be temporarily entered into the scan list and scanned until the SELECTED channel is changed.
When scan is turned off by pushing the SCAN switch, the
radio will return to the SELECTED channel.
DISPLAY
Channel Indicator
While no signal is being received, the channel indicator
will always show the SELECTED channel. When an active
channel is received, the channel indicator will show the received channel.
SCN Indicator
When the SCAN button is pushed, the radio will light the
SCN indicator and begin scanning. The SCN indicator will
flash when the microphone is placed off-hook to show the radio is no longer scanning (only if the radio is PC programmed
not to scan off-hook).
TRANSMITTING WHILE IN SCAN
Transmitter operation in scan is determined by the PC programming of the radio’s personality. A flow chart is provided
in this section to summarize the scan operation described below.
Off-Hook Scan Not Enabled (default):
With off-hook scan not enabled (normal default condition),
all scanning will stop when the microphone is placed off-hook.
The SCN indicator will flash to show all scanning has stopped.
If a signal is
not being received when the mic is placed offhook, the radio will transmit on the SELECTED channel. If a
signal is being received when the mic is placed off-hook, the
radio can be PC programmed (using the "scan transmit option") to either stay on the receive channel or revert to the SELECTED channel. When the mic is placed back on-hook, the
radio will immediately start scanning, even if the received
channel was still active.
Off-Hook Scan Enabled:
With off-hook scan enabled, moving the microphone offhook will not affect scan operation. The radio will continue
scanning. If a signal is
not being received, the radio will trans-
mit on the SELECT ED channel. I f a signal
is being received,
the radio can be PC programmed (using the "scan transmit
channel" option) to either stay on the receive channel or revert
to the SELECTED channel w h en the mic PTT is keyed.
MONITOR SWITCH OPERATION IN SCAN
The MON switch does not operate while scanning inactive
channels. When a channel be comes active, the MON switch
operates only during the scan hang time after the channel activity disappears.
CHANNEL CHANGES IN SCAN
Pushing the channel switches (UP or DOWN) while sca n is
turned on will change the SELECTED channel assignment. If a
signal is being received and the channel switches are pushed,
the radio will revert to the new SELECTED channel assignment. The channel indicator display will show the new assignment. After 2 seconds, if no activity appears on the new
SELECTED channel, scanning will resume. If th e S E LEC T E D
channel is changed to a channel not in the scan list, the new
channel will be temporarily added to the scan list until the
SELECTED channel is changed again.
Temporary Channel Deletions
The SCAN function must be turned off to make any permanent changes (additions, deletions, re-priorizations) to the
scan list. While in scan, temporary channel deletions may be
made to the scan list. The original scan list will be back in
effect by either turning scan off (by pushing the SCAN
switch) or by turning the radio power off and back on.
When the radio stops scanning on an active channel, the
channel may be temporarily deleted by holding the SCAN
switch and then pressing the CHANNEL DOWN switch.
The radio will immediately resume scanning while skipping
over the temporarily deleted channel.
Temporary deletions cannot be made until the radio stops
on an active channel. P1 and P2 channels cannot be temporarily deleted.
PC PROGRAMMING SCAN
OPTIONS
1. Scan Hang Time:
A scan hang time is applied after the carrier on an active
channel disappears and after releasing the transmitter
PTT. The hang time prevents momentary signal fades
from resuming scan (which would cause big gaps in the
receive audio) and allows time to respond to a received
call. The hang time also prevents the radio from immedi-
ately leaving the channel and resuming scan when the
PTT is released to allow time for a return call. The scan
hang time is normally 2 seconds in length and PC pro-
grammable from 0.3 to 5 seconds in 0.1 second steps. If
no other channel activity occurs during this time, scan-
ning will then resume. The priority channels are still be-
ing sampled during the hang time.
2. Hang After PTT Release:
YES (default): If off-hook scan is enabled, after thePTT
is released, the radio will stay on channel for the length
of the scan hang t ime (if no signal is received).
NO: If off-hook scan is enabled, when the PTT is re-
leased, the radio will not stay on channel but will imme-
diately resume scanning. The scan hang time will still be
applied after a received carrier disappears.
3. Scan For Channel Guard:
YES: The radio will stop scanning only on an active
channel with the correct Channe l Guard. If a scan ch annel has no Channel Guard programmed, the radio will
scan only on noise squelch operation for that channel.
NO: The radio will ignore Channel Guard and scan only
on noise squelch operation.
4. Scan Transmit Channel:
SELECTED channel (default): The radio will always revert to the SELECTED channel when the mic PTT is
keyed or when the mic is placed off-hook (if off-hook
scan is disabled).
Receive channel: If a signal is being received, the radio
will remain on the cha nnel when the mic PTT is keyed or
when the mic is placed off-hook (if off-hook scan is disabled). If a signal is not being received, the radio will
transmit on the SELECTED channel.
5. Off-Hook Scan Enable:
NO (default): The radio will stop scanning and flash the
SCN indicator when the mic is off-hook. See the"scan
transmit channel" description below to program where
the radio will transmit.
YES: The radio will continue scanning with the mic offhook. See the "scan transmit channel" description below
to program where the radio will transmit.
6. Priority 1 Channel Programming:
The P1 channel may be added to the scan list by one of
three methods:
• Method 1 - Front programmable (default):
P1 is added to the scan list using the front Control
Panel.
• Method 2 - Fixed P1 Option:
The P1 channel is PC programmed into the radio’s
personality.
• Method 3 - SELECTED channel option:
The P1 channel follows the SELECTED channel.
Each time the scan function is turned on by pushing
the SCAN switch, the P1 channel becomes the
channel in the display. The P1 channel will then
follow any changes in the SELECTED channel assignment when the channel switches are pushed.
C
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LBI-31932
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DETAILED SCAN OPERATION
The scan operation is controlled b y the Logic Board, and
provides for scanning any or all of up to 16 channels. The
scanned channels may be located anywhere within the frequency band of the radio, and can include two priority channels (P1 and P2).
If desired, all 16 channels can be scanned with or without
priority level. When SCAN is enabled, scanni ng of t h e s e le c te d
channels starts immediately. Scan time is approximately 15 to
160 milliseconds per channel, depending upon whether Channel Guard has been programmed for a particular scan channel.
If a carrier is not detected, the scan time is 15 milliseconds. If a
carrier is detected and Channel Guard is programmed for the
channel, time is 75-175 milliseconds, depending upon how
close the Channel Guard tone is to the desired tone. Typical
value is less than 175 milliseconds.
Priority 1 (P1) and Priority 2 (P2)channels, if present, are
not part of the non-priority channel scan list (SI, S2, S3,...) and
are treated separately. If there is no activity on any of the
scanned channels, then the scan sequence is as shown in the
following examples.
Example 1: (More than four Non-Priority channels,
i.e., six channels)
P 1-P2-S6-S5-S4-S3-P1-P2-S2-S1-S6-S5-P1-P2-S4S3-S2-S1I-P1-P2-...
Example 2: (Four or less Non-Priority channels, i.e.,
three channels)
P1-P2-S3-S2-S1-P1-P2-S3-S2-S1-P1-P2-S3-S2-S1PI-P2-S3-S2-S1-...
Therefore, the scan sequence is: Scan P1 and P2 if programmed. Then scan up to four non-priority channels before
scanning P1 and P2 again. If more than 4 non-priority channels
exist, then scan will wrap around, continuously scanning four
channels of the non-priority list between each P1, P2 scan sequence. If the number of non-priority channels is less than or
equal to four, then all non-priority channels will be scanned between each P1, P2 scan.
As an added example, consider channels 1-8 to be the scanned
channels, with P1 being Channel 1 and P2 being Channel 8.
The scanning order then would be:
P1-P2-S6-S5-S4-S3-P1-P2-S2-S1-S6-S5-P1-P2-S4-S3-...
↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
1 8 7 6 5 4 1 8 3 2 7 6 1 8 5 4
Since it takes approximately 15 to 160 milliseconds to scan
each channel, then each Priorit y channel is sample d ever y 0.09
to 0.96 seconds and the Non-Priority channels are sampled at
least once every 0.12 to 1.28 seconds. If Channel Guard is programmed for a channel but no carrier is detected, the scan time
for that channel is 15 milliseconds.
SCANNING (Stopped On A Valid SCAN Channel):
Once a carrier is detected, the Channel display will in di ca t e
that channel. If the channel is a Non-Priority c h a nnel, and there
are no Priority channels, then scanning is halted. If only a Priority 2 (P2) channel is present, then it is scanned every 5 seconds if it has Channel Guard programmed and carrier is
detected, and every second otherwise. If there is only a Priority
1 (P1) channel, then it is sampled every 2.5 seconds if it has
Channel Guard and carrier is detected, and every 500 milliseconds otherwise. If there are P1 and P2 Priority channels, the
sample rate will vary.
In order to show the various scan conditions, the following
conditions are used:
CONDITION 1: P1 and P2 have Channel Guard programm e d
a. No carriers detected on P1 or P2
P1-P1-P2-P1-P1-P2-P1-P1-P2...
tb (time between samples) =500 msec
ts (time of sample) =32 msec
b. Carrier on P1 detected/wrong Channel Guard
P1-P2-P2-P2-P2-P2-P1-P2-P2-P2-P2-P2-P1-P2-...
tb=1 second
ts= 32 msec for P2
75-175 msec for P1
c. Carrier on P2 detected/wrong Channel Guard
P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1-...
tb=500 milliseconds
ts=32 milliseconds for P1
75-175 milliseconds for P2
d. Carrier on P1 and P2 detected/both wrong Channel Guard
P1-P1-P2-P1-P1-P2-P1-P1-P2-...
tb=2.5 seconds
ts=75-175 msec
e. Carrier on P1 and right Channel Guard
Stop scan, display P1
The following conditions are shown while listening to a
Non-Priority channel, "ts" is the "hole" or audio blanking time in the signal being heard while the radio is
checking the priority channels for activity.
NOTE
LBI-31932
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f. Carrier on P2 and right Channel Guard
Display P2, scan P1
P1-P1-P1-P1-P1-P1-...
tb=500 msec
ts=32 msec
g. Carrier on P2 with right Channel Guard, carrier/wrong
Channel Guard on P1
P1-P1-P1-P1-P1-...
tb=2.5 seconds
ts=75-175 msec
CONDITION 2: Priority 1 has Channel Guard programmed,
Priority 2 does not.
a. No carriers detected on P1 or P2
P1-P1-P2-P1-P1-P2-P1-P1-P2-...
tb (time between samples) =500 msec
ts (time of sample) =32 msec
b. Carrier on P1 detected/wrong Channel Guard
P1-P2-P2-P2-P2-P2-P1-P2-P2-P2-P2-P2-P1-P2-...
tb=1 second
ts=32 mscec for P2
75-175 msec for PI
c. Carrier on P1 detected/right Channel Guard
Stop on P1, stop scan
d. Carrier on P2
Stop on P2, scan P1
P1-P1-P1-P1-...
tb=500 seconds
ts=32 msec
e. Carrier on P2 and P1 with wrong Chan ne l G u ard on P 1
Stop on P2, scan P1
P1-P1-P1-P1-P1-P1-...
tb=2.5 seconds
ts=75-175 msec
CONDITION 3: P2 has Channel Guard, P1 does not
a. No carriers detected on P1 or P2
P1-P1-P2-P1-P1-P2-P1-P1-P2-...
tb (time between samples) =500 msec
ts (time of sample) =32 msec
b. Carrier on P2 detected/wrong Channel Guard
P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1-...
tb=500 milliseconds
ts=32 msec for P1
75-175 msec for P2
c. Carrier on P2 detected/right Channel Guard
Stop on P2, scan PI
P1-P1-P1-P1-P1-P1-...
tb=500 msec
ts=32 msec
d. Carrier on P1 detected
Stop on P1, stop scan
CONDITION 4: P1 and P2 with no Channel Guard
a. No carriers detected on P1 or P2
P1-P1-P2-P1-P1-P2-P1-P1-P2-...
tb (time between samples) =500 msec
ts (time of sample) =32 msec
b. Carrier on P2
Display P2, scan P1
P1-P1-P1-P1-P1-P1-...
tb=500 msec
ts=32 msec
c. Carrier on P1
Stop on P1, stop scan
PUBLIC ADDRESS OPTION OPER ATION
PUBLIC ADDRESS OPTION
If the Public Address Option is pres ent, the radio may be
used as public address amplifier. Press the PA button to enable the option (Scan must be off). The LCD will show
"OPT" in the upper center portion of the display. When the
mic is keyed, the radio no longer transmits, but allows the
mic audio to feed the speaker. Adjust the VOLUME for desired level. Press the PA button a second time to disable the
option. The OPT indicator will go out. Changing ch ann els or
turning scan on will also turn the option off.
The Public Address microphone audio normally feeds an external speaker. An ON/OFF switch, which is mounted on or
near the radio, allows selecting either the internal or external
speaker for the receiver audio. The ON/OFF switch turns the
receiver audio on or off to the external speaker. This switch
still functions for the receiver audio with the PA option disabled.
TYPE 99 OPTION OPERATION
If the Type 99 Option is present, individual selective calling
is possible. Press the T99 button to enable the decoder option. (Scan must be off). The LCD will show "OPT" in the
upper center portion of the display. When a call is received,
an alert tone will be heard and the OPT indicator will flash
continuously . Aft er r ece iv in g the c al l, pr es s th e RESE T b ut ton to reset the decoder for the Next call. The OPT indicator
will stop flashing.
To disable the decoder, press the T99 but ton while the OPT
indicator is on continuously. The OPT indicator will go out.
If a call was received and the OPT is flashing, the RESET
button must first be pushed before the T99 button will turn
off the decoder.
If the Horn Alert option is present with the Type 99 option,
the radio can beep the vehicle horn when a Type 99 call is
received. This option permits alerting persons out of the vehicle when a call is received. The Horn ON/OFF switch
which is mounted on or near the radio, is used to turn off the
horn beep relay.
DETAILED TYPE 99 O P ERATION AND
PROGRAMMING
The optional Type 99 Control Panels provide individual,
group, and super group call decode. The Motorola formatted
two-tone sequential signalling schemes can also be decoded.
In Type 99 tone systems, calls will not be heard from the
receiver until the proper two tones are detected. When the
second tone is decoded and recognized as correct, an alert
tone sounds during the remaining portion of the seco nd t on e.
The receiver audio pa th opens and remains open to recei ve
messages until the decoder is reset. The OPT indicator will
also flash to show a call has been rec ei v ed.
The MVS radio can be PC programmed with up to three
separate tables of tones. Either the EGE Type 99 format or
the Motorola format can be assigned to each tone ta ble. The
tone decoder can be enabled individually for each channel.
Once enabled, one of the three tone tables can be selected
for each channel. After choosing a tone table, the call formats must be specified: Individual, Group, and Super Group
for the EGE format or Individual, Group, and Quick Call for
the Motorola format.
The Group Call format allows communication with all
radios within a subgroup. The Super Group Call (in EGE
tone systems) or Quick-Call (in Motorola tone systems) allows communication between all radios in a system.
EGE TYPE 99 FORMAT
Tone frequencies in the EGE tone system fall within the
range of 517.5 to 997.5 Hz.
C
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A round-off error will o ccur w h en entering the t o n e f requencies. This error is less than 0.2% and will not
cause any decoding problems. For example, if the
standard tone frequency of 517.5 Hz is entered, the actual decoder frequency will be 517.4 Hz. This new frequency will appear on the screen in the tone tables.
NOTE
LBI-31932
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In the EGE tone format, the first tone may be from tone
group A (for Individual or Group calls) or from tone group C
(for Super Group calls). The s econd tone may be from tone
group B (for Individual calls) or from tone group D (for
Group and Super Group calls). The EGE tone format is i l lustrated below.
For example, assume the paging number to be 123. The
first digit of the paging number is a I. Look in Table 2, and
read down the column labeled "100’ s Digit" to a 1. Read
horizontally across to the column labeled "10’s Digit". The
tone group is B. The second digit of the paging number is a
2. The tone number is B2. Look in Table 3 and down the column labeled "Tone Designator" to find B2. Read horizontally across to the column labeled "Tone Frequency". The
first tone frequency is 78 7. 5 Hz.
To determine the second tone frequency look in Table 2
and as before, find the first digit of the paging number 1.
The second tone group is A. The third digit of the paging
number is a 3 and the Tone Designator is A3. In Table 3 read
down the column labeled "Tone Designator" and find A3.
Read horizontally across the column labeled "Tone Frequency". The second tone frequency is 802.5 Hz.
For different paging numbers, locate the first digit in the
"100’s Digit" column and determine the tone frequencies as
described in the example. For a complete description of tone
applications see DATAFILE BULLETIN DF-5000-3A.
Tone D is the diagonal tone used (in EGE tone systems
only) when the first and second tone frequencies are the
same. The standard frequency for Tone D is 742.5 Hz, but
may be programmed with any tone frequency.
MOTOROLA FORMAT
Tone frequencies in the Motorola tone systems fall
within the range of 288.5 to 1433.4.
In the Motorola tone format, the first tone may be one of
three tones: A for Individual Call, B for Quick Call, and C for
Group Call. The second or final tone is B in all cases.
The Motorola tone format is illustrated below.
INDIVIDUAL CALL
Tables 4 and 5 may also be used to determine the tone frequencies.
The first digit of the code determines the tone groups used
in the code (See Table 4). Then T a ble 5 is used t o dete rmin e the
actual tone frequencies.
For a code of 124, the tone groups used are shown in Table
4. 4. (Tone A and T o n e B are both located in T one Group 1, and
Tone B is tone number 4. Refer to the following examples for
additional information.
EXAMPLE 1 - Code 098:
The digit "0" in Table 4 (First Digit of Code) shows that
Tone A is in Tone Group 4, and Tone B is in To n e Group 2 (See
Table 5).
Tone number 9 in Tone Group 4 is 524.6 Hz.
Tone number 8 in Tone Group 2 is 879.0 Hz.
EXAMPLE 2 - Code 265:
The digit "2" in Table 4 sh ows th at b oth Tone A and Tone B
are both in T one Group 2.
Tone num be r 6 is 788.5 H z.
Tone number 5 is 746.8 Hz.
GROUP CALL (Quick-Call Format)
ln Group Call application, the Tone Group is determined by
Table 6, while the frequency is determin ed by Table 5. Refer to
the following examples.
EXAMPLE 1 - Group Call Code 07 (also code 27 and 37):
The digit "0" in Table 6 shows that Tone B is in Tone
Group 2 along with 20 to 29 and 30 to 39. Tone number 7 in
Tone Group 2 is 832.5 Hz (See Ta ble 5).
EXAMPLE 2 - Group Call Code 98 (also code 48 and 88):
The digit "9" in Table shows that Tone B is in Tone Group
4 along with 40 to 49 and 80 to 89. Tone number 8 in Tone
Group 4 is 496.8 Hz.
EGE FORMAT
Table 2 - TONE GROUPS
100’s
DIGIT
10’s
DIGIT
1’s
DIGIT
For 1st
Tone
For 2nd
Tone
0
1
2
3
4
5
6
7
8
9
A
B
B
A
C
C
C
A
B
Not Used
A
A
B
B
C
A
B
C
C
Table 3 - Tone Generator Frequencies
TONE
GROUP
TONE
DESIGNATOR
TONE
FREQUENCY
A
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
682.5 Hz
592.5 Hz
757.5 Hz
802.5 Hz
847.5 Hz
892.5 Hz
937.5 Hz
547.5 Hz
727.5 Hz
637.5 Hz
B
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
652.5 Hz
607.5 Hz
787.5 Hz
832.5 Hz
877.5 Hz
922.5 Hz
967.5 Hz
517.5 Hz
562.5 Hz
697.5 Hz
C
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
667.5 Hz
712.5 Hz
772.5 Hz
817.5 Hz
862.5 Hz
907.5 Hz
952.5 Hz
532.5 Hz
577.5 Hz
622.5 Hz
The MVS radio is able to recognize the A, B, and C
tones. Individual, Group, and Quick Call form ats may b e
used simultaneously.
NOTE
Tone frequencies above 1000 Hz must be rounded off to
the nearest Hz when programming the tone tables. For
example, the standard tone frequency of 1153.4 Hz must
be entered as 1153 Hz. Also, the program will cause a
round-off error of ±0.2 Hz for frequencies below 1000
Hz. These errors will n ot cause any decoding problems.
NOTE
Table 4 - Motorola-Type Coder Numbers
First Digit
of
Code
Group from
Which Tone A
is Selected
Group from
Which To n e B
is Selected
1
2
3
4
5
6
7
8
9
0
A
1
2
1
4
5
2
4
5
2
4
3
1
2
2
4
5
1
5
4
4
2
3
Group Call code numbers range from 00 to 99. How-
ever, there are several Group Calls with the same Tone B
frequency. This limits the total number of Group Calls to
40.
NOTE
LBI-31932
10
MECHANICAL PARTS BREAKDOWN
PARTS LIST
C
O
M
B
O
Table 5 - Motorola Tone Frequencies And Groups
Tone
No.
Tone
Group 1
Tone
Group 2
Tone
Group 3
Tone
Group 4
Tone
Group 5
Tone
Group 6
1
2
3
4
5
6
7
8
9
0
349.0 Hz
368.5 Hz
389.0 Hz
410.8 Hz
433.7 Hz
457.9 Hz
483.5 Hz
510.5 Hz
539.0 Hz
330.5 Hz
600.9 Hz
634.5 Hz
669.9 Hz
707.3 Hz
746.8 Hz
788.5 Hz
832.5 Hz
879.0 Hz
928.1 Hz
569.1 Hz
288.5 Hz
296.5 Hz
304.7 Hz
313.0 Hz
953.7 Hz
979.9 Hz
1006.9 Hz
1034.7 Hz
1063.2 Hz
1092.4 Hz
339.6 Hz
358.6 Hz
378.6 Hz
399.8 Hz
422.1 Hz
445.7 Hz
470.5 Hz
496.8 Hz
524.6 Hz
321.7 Hz
584.8 Hz
617.4 Hz
651.9 Hz
688.3 Hz
726.8 Hz
767.4 Hz
810.2 Hz
855.5 Hz
903.2 Hz
553.9 Hz
1153.4 Hz
1185.2 Hz
1217.8 Hz
1251.4 Hz
1285.8 Hz
1321.2 Hz
1357.6 Hz
1395.0 Hz
1433.4 Hz
1122.5 Hz
Table 6 - Motorola Group Call Tone Groups (TG)
GROUP CALL
CODE NUMBER
TONE GROUP
(TONE B)
00-09
TG2
10-19 TG1
20-29 TG2
30-39 TG2
40-49 TG4
50-59 TG5
60-69 TG1
70-79 TG5
80-89 TG4
90-99 TG4
PARTS LIST
LBI-31932
11
(19D901983, Sh. 1, Rev. 7)
INTERCONNECTION DIAGRAM
LBI-31932
12
INTERCONNECTION DIAGRAM
C
O
M
B
O
(19D901983, Sh. 2, Rev. 3)
LBI-31932
13
INTERCONNECTION DIAGRAM
(19D901983, Sh. 3, Rev. 3)
LBI-31932
14
INTERCONNECTION DIAGRAM
C
O
M
B
O
(19D901983, Sh. 4, Rev. 2)
LBI-31932
15
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