E.F. Johnson Company LTR-Net 002-9803-601, LTR-Net 98x3, LTR-Net 98x6, LTR-Net 9800 Series Operating Manual

LTR-Net™

9800 Series

Trunked Mobile Radio

98x3/98x6

LTR-NET™ Mobile

OPERATING

MANUAL

LAND MOBILE PRODUCT WARRANTY - The manufacturer’s
warranty statement for this product is available from your product
supplier or from EFJohnson, 299 Johnson Avenue, Box 1249,
Waseca, MN 56093-0514. Phone [phone].

Copyright© 1999 by the E.F. Johnson Company

E.F. Johnson Company, which was founded in 1923, designs, manu­factures, and markets radio communication products, systems, and
services worldwide. E.F. Johnson produces equipment for land
mobile radio and mobiletelephone services which include business,
industrial, government, public safety, and personal users.

Viking Head/EFJohns on lo go, LTR-Net™, LTR®, and Call Guard®
are trademarks of the E.F. Johnson Company. All other company
and/or product names used in this manual are trademarks and/or
registered trademarks of their respective manufacturer.

SAFETY INFORMATION

SAFETY INFORMATION

The FCC has adopted a safety standard for human exposure to
RF energy. Proper operation of this radio under normal condi­tions results in user exposure to RF energy below the Occupa­tional Safety and Hea lth Act and Fe deral Commun ication
Commission limits.

WARNING

DO NOT allow the antenna to touch or come in very close prox­imity with the eyes, face, or any exposed body parts while the
radio is transmitting.

DO NOT operate the transmitter of a mobile radio when a person
outside the vehicle is within one (1) meter of the antenna.

DO NOT operate the transmitter of a stationary radio (base
station or marine radio) when a person is within one (1) meter of
the antenna.

DO NOT operate the radio in explosive or flammable atmo­spheres. The transmitted radio energy could trigger blasting caps
or cause an explosion.

DO NOT operate the radio without the proper antenna installed.

DO NOT allow children to operate or play with this radio.

NOTE: The above warning list is not intended to include all
hazards that may be encountered when using this radio.

This device complies with Part 15 of the FCC rules. Operation is
subject to the condition that this device does not cause harmful
interference. In addition, changes or modifications to this equip-

ment not expressly a ppr oved by EFJ ohns on c oul d voi d t he us er’s
authority to opera te this equipment (FC C rules, 47C FR Part

15.19).

4

SAFETY INFORMATION

FCC EXPOSURE LIMITS

This mobile radio transceiver was tested by the manufacturer
with an appropriate antenna in order to verify compliance wi th
Maximum Permissible Exposure (MPE) limits set under Section

2.1091 of the FCC Rules and Regulations. The guidelines used in

the evaluation are derived from Figure 1 (B) titled “Limits For
General Population/Uncontrolled Exposure” which is from FCC
report OET bulletin #65.

Figure 1

FCC Limits for Maximum Permissible Exposure (MPE)

(A) Limits For Occupational/Controlled Exposure

Frequency Range

(MHz)

0.3-3.0 614 1.63 (100)* 6

3.0-30 1842/f 4.89/f (900/f
30-300 61.4 0.163 1.0 6
300-1500 -- -- f/300 6
1500-100,000 -- -- 5 6

Electric Field

Strength (E)

(V/m)

Magnetic Field

Strength (H)

(A/m)

Power Density

(S)

(mW/cm22)

2

)* 6

Averaging

Time |E|

S (minutes)

(B) Limits For General Population/Uncontrolled Exposure

Frequency Range

(MHz)

0.3-1.34 614 1.63 (100)* 30

1.34-30 824/f 2.19/f (180/f
30-300 27.5 0.073 0.2 30
300-1500 -- -- f/1500 30
1500-100,000 -- -- 1.0 30
f = Frequency in MHz *Plane-wave equivalent power de nsity

Electric Field

Strength (E)

(V/m)

Magnetic Field

Strength (H)

(A/m)

Power Density

(S)

(mW/cm2

2

)* 30

2

)

Time |E|

Averaging

S (minutes)

2,

2,

|H|2,

|H|2,

5

SAFETY INFORMATION

Figure 2 lists the antenna whips and bases recommended for
use in each frequency range. Each model of this radio was tested
with the appropriate ant enn a lis te d. The antenna was mounted in the
center of the roof of a domestic manufactured 4-door passenger
sedan. The radio manufacturer has determined that the user and
service personnel should remain one (1) meter in distance away
from the antenna when transmitting. By maintaining this distance,
these individuals are not exposed to radio frequency energy or
magnetic fields in excess of the guidelines set forth in Figure 1.

NOTE: If the installer or user changes the type or location of the
antenna, they should be aware of the MPE guidelines shown in
Figure 1 and take measures to comply with those guidelines.

Figure 2

Recommended Antenna Whips and Bases

(Antenna Manufacturer - Antenna Specialists)

Frequency Whip Model No. Base Model No.

136-144 MHz ASPJ1415 KM220
144-152 MHz ASPA1415 KM220
152-162 MHz ASPB1415 KM220
162-174 MHz ASPC1415 KM220
400-430 MHz ASPE1615 KM220
430-470 MHz ASPD1615 KM220

470--512 MHz ASPF1615 KM220

806-869 MHz ASPA1855 KM220
890-960 MHz ASPG1865 KM220

6

TABLE OF CONTENTS

TABLE OF CONTENTS

SAFETY INFORMATION
QUICK REFERENCE GUIDE
FEATURES

General Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

LTR-Net Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

LTR Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Conventional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

CONTROLS AND DISPLAY

Front Panel Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Rear Panel Jacks and Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Display Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

GENERAL OPERATION

Power-Up Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Determining Volume Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Backlight Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

System/Group Display Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Selecting the System and Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Setting Squelch Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Microphone Off-Hook Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

LTR-Net, LTR, and Conventional Operation . . . . . . . . . . . . . . . . . . .19

GENERAL FEATURES

Bank Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Call Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Emergency Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Function (FCN) Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Home System/Group Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Horn Alert. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Option Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Power Turn-Off Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Proceed (Clear-To-Talk) Tone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Receive-Only Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Stealth Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Tone Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Transmitter Thermal Foldback. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

STANDARD GROUP CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Placing a Standard Group Call. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Receiving a Standard Group Call. . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

TELEPHONE CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

7

TABLE OF CONTENTS

Placing Telephone Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Receiving a Telephone Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Landside-Originate Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . . . .31

LTR-NET AUXILIARY CALLS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Placing LTR-Net Auxiliary Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Receiving Auxiliary Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

OPTION SWITCHES AND MENU MODE

. . . . . . . . . . . . . . . . . . . . .33

Option Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Menu Mode Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Using Menu Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

SYSTEM AND GROUP SCANNING

. . . . . . . . . . . . . . . . . . . . . . . . . .35

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Scan List Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Scan Delay and Continue Timers. . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Transmitting In The Scan Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

LTR-NET AND LTR FEATURES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Transmit Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Calls on Priority ID Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Telephone Group Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

LTR-NET FEATURES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

LTR-Net Standard and Special Calls . . . . . . . . . . . . . . . . . . . . . . . . . .42

Busy Queuing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Roaming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

LTR FEATURES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Standard Group Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

CONVENTIONAL FEATURES

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Monitoring Before Transmitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Transmit Disable On Busy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Talk-Around. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Call Guard Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

MISCELLANEOUS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Supervisory Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

LTR-Net Special Call Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

LTR Telephone Call Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Display Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Menu Mode Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

System Operator Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Speaking Into Microphone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Operation At Extended Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Preventing Battery Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Licensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Transceiver Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

8

QUICK REFERENCE GUIDE

QUICK REFERENCE GUIDE

Red - Transmit
Amber - Transmit (Reduced Pwr)
Green - Busy Conv. Group (Channel)

On-Off/Volume

(Press/Rotate) (Press/Rotate)

Select Switch

System Scan

List

Encrypt

Phone/

Aux Call

Horn

Scan

Group Scan

Monitor

Option

List

Call

Power On/Off - Press on-off /volume control.
Set Volume Level - Rotate on-off/volume control.
Change System or Group - Press Select swi tc h to ena bl e sys tem or

group select mode (indicated by ←/→ or __). Then rotate Sel ect
switch to select desired system or group (see page 17).

Select Menu Mode - Press FCN twice or Menu switch and then

rotate/press Select switch as required to display/select desired
parameter (see page 33).

Select Home System/Group - Press FCN then Select sw. or HOME
Scan On/Off - Press SCAN switch. Scan on = , Scanning

occurring = scrolling underline (see page 35).

Program System or Gro up Scan List - Press Select switch to enable

system or group select mode (same as when changing system or
group), then press A/D switch. System in list = , Group in
list = (see page 38).

Set Squelch Level (Conv. Only) - Press FCN then rotate Select

switch with conventional system selected (see page 18).

Monitor Befor e Transmitting (Conv . Only ) - Take microphone off -

hook to enable monitor mode (indicated by ). Channel is busy
if indicator is green or someone is talking (see page 44).

9

FEATURES

FEATURES

General Features

• Up to approximately 99 systems with up to 99 groups each

• LTR-Net™, LTR®, and conventional operation

• Unique 8-character system and group identification tags

• System and group scan

• User programmable system and group scan lists

• Menu mode to control variou s functions

• Five programmable option switches

• Up to 16 banks selectable

• Proceed (clear-to-talk) tone

• Call indicator

• Horn alert

• Emergency quick select switch

• Companding (optional)

• Encryption (optional)

• Receive-only groups

LTR-Net Features

• Roaming (automatic locality search)

• Standard (mobile-to-mobile) calls

• Special calls including telephone, unique ID, and directed group

• Busy queuing of special calls by radio system

• Tr ansm i t in hi bi t

• Receive priority calls

LTR Features

• Standard and telephone calls

• Tr ansm i t in hi bi t

• Receive priority calls

Conventional Features

• Busy indicator

• Talk-around

• User-adjustable squelch level

• Call Guard® squelch control

• Tr ansm i t disab l e on busy

NOTE: System operator programming determines the availability of many
of the preceding features.

10

CONTROLS AND DISPLAY

CONTROLS AND DISPLAY

Transmit/Busy

Indicator

Microphone

Jack

Option Switches

On-Off/Volume

Speaker

Select Switch

Front Panel Controls

On-Off V olume - Pressing this knob turns power on and off. The
vehicle ignition switch may also control power as described in

“Power Turn-Off Delay” on page 24. Rotating this knob sets the
speaker volume (see page 15).

Select Switc h - This switch chan ges the selected system or group and
is also used for other functions such as selecting parameters in the
menu mode. T o change the system or gro up, press this knob to switch
between the system and group select modes, and then rotate it to
increase or decrease the system or group. Refer to “Selecting the
System and Group” on page 17 and the FCN switch description which
follows for more information.

Option Switches - The five front panel option switches can be
programmed by your system operator to control the functions which
follow. Refer to the section indicated for more information. Th e
keycap usually indicates the function controlled by the switch.

11

CONTROLS AND DISPLAY

A/D - Scan lis t add/delete (see page 38)
BANK - Bank select (see page 20)
EMER - Emergency switch (see page 21)
ENCPT - Encryption select (see page 21)
FCN - Function select (see following description)
HOME - Select home system/group (see page 22)
(Menu) - Menu mode select (see page 33)
AUX - Option select (see page 24)
ROAM - Roam on-off (see page 43)
SCAN - Scan on-off (see page 35)
TEL - Selects telephone group (see “Tel Grp Select” on page 41)
(Blank) - Not used (disabled) or one of above functions

FCN (Function) Switch - This switch, if programmed, selects the

following functions:

Menu Mode Select
Home Sys/Grp Select
Conv Squelch Set

- Press FCN twice (see page 33)

- FCN/press Select switch (s ee page 22)

- FCN/rota te Select switch (see page 18)

Transmit/Busy Indicator - Indicates the follo wing conditions:

Red

- Transmitter keyed, normal power output

Orange

- Transmitter keyed, power reduced because internal

temperature is high (see page 27).

Green

- Busy conventi onal group (c hannel). Refer t o “Monitoring

Before Transmitting” on page 44 for more information.

Microphone Jack - Connection point for the microphone.

Microphone Push-To-Talk (PTT) Switch (Not Shown) - Push-

button on the microphone which is pressed to key the transmitter.

Speaker - The internal speaker is located behind the grille. An
optional speake r can be connected to the extern al speaker jack located
on the back (see “Speaker Jack” which follows).

12

CONTROLS AND DISPLAY

Antenna

Jack

Power

Jack

Speaker

Jack

Rear Panel Jacks and Connectors

Antenna Jack - Miniature UHF jack for connecting the 50-ohm
antenna.

Power Jack - Connec tion point for the po wer cable which attach es to
the vehicle battery. A nominal 12-volt DC, negative ground power
source is required.

Speaker Jack - Connection point for an optional external 4.7-ohm,
5-watt speaker . The internal speaker is au tomatically disabl ed when a
speaker is plugged into this jack.

Accessory Cable (Not Shown) - This optional cable is used to
connect functions such as ignition switch sense to the transceiver.

13

CONTROLS AND DISPLAY

System Scan

List

16-Character

Message Area

Phone/

UID Grp

Encryption

Scan

Horn Alert

Display Description

Call

Option

Group Scan

List

Monitor

16-Character Message Area - Indicates the selected system and
group (see page 16) and also error conditions and status information.

- Indicates that the displayed system is in the scan list and

scanned normally (see page 38).

- Indicates that the displayed group is in the scan list and

scanned normally (see page 38).

- Indicates that the selected group is programme d for tel ep hone
calls. With LTR-Net operation, it also indicates that the group is
programmed for Auxiliary calls (see page 42).

- Indicates that optional encryption is enabled (see page 21).

- Indicates that the horn alert is enabled (see page 23).

- Indicates that scanning is enabled (see page 35).

14

GENERAL OPERATION

- Indicates that an option controlled by the AUX switch or

OPTION menu parameter i s enabled (see page 24).

- Indicates that a call has been received on a group programmed
for a call indicator (see page 21). To turn this indication off, press
any key.

- Indicates t hat the monitor m ode is enabled. This mode disables
Call Guard squelch and other squelch control features so that all
messages are heard on conventional systems (see page 44).

GENERAL OPERATION

Power-Up Sequence

When power is turned on, the backlight turns on, all segments
in the display are momentarily enabled, and the last seven digits of
the transceiver part number are very briefly displayed. A beep then
sounds (if tones are enabled) and the transceiver is operational.

Determining Volume Level

The relative volume setting can be determined by noting the
position of the index on the volume knob. You may also be able to
enable a reference tone or background noise for use in setting the
volume. Proceed as follows:

• If key press tones are en abled, a short ton e sounds when an option

switch is pressed or the Select switch is pressed or rotated.

• If a conventional sy stem is selected, take the microphone off -hook

and if someone is using the channel, voice is heard. If no one is
using the channel, the squelch control can be adjusted counter-

clockwise as described in “Setting Squelch Control” on page 18
and noise is heard. It is not possible to unsquelch the transceiver
in this manner when an LTR-Net or LTR system is selected.

15

GENERAL OPERATION

Backlight Operation

The display and keypad backlight can be controlled by the
BACKLG T menu parameter (see page 33). The three states that can be
selected are Bright, Dim, and Off. If this menu parameter is not select­able, the backlight is fixed in one of these states by programming.

System/Group Display Modes

The selected system and group are displayed using either a
Numeric or Alpha display mode. The display mode is selectable if
the S/G DISPL menu parameter is available (see page 33). Other­wise, it is fixed in one of these modes by programming.

Numeric Mode

- In this mode the selected system and group
numbers are displ ayed on t he top l ine as Sxx and Gxx, an d the gr oup
alpha tag is displayed on the bottom line. For example, System 1,
Group 1 (CAR 220) is displayed as follows. The system alpha tag is
not displayed in this mode.

System Number

Group Number

Group Alpha Tag

Numeric Display Mode

Alpha Mode

- In the alpha mode, the system alpha tag is displayed

on the top line and the group alpha tag is displayed on the bottom

line. For example, a “SECURITY” system and “CAR 220” group
are displayed as follows. The system and group numbers are not
displayed in this mode.

16

System Alpha Tag
Group Alpha Tag

Alpha Display Mode

GENERAL OPERATION

Selecting the System and Group

The front panel Select switch is used to change the system and
group. Pressing this switch toggles between the system and group
select modes, and rotating it increases or decreases the system or
group.

In the Numeric display mode (see preceding description), the

system select mode is indicate d whe n t he ar row points to “Sxx”, and
the group select mode is indicated when it points to “Gxx” (see
following illustratio n).

System Select

Mode

Group Select

Mode

Select Mode Indication With Numeric Display

In the Alpha Tag display mode, the system select mode is indi­cated by an underline in the left-most character position of the
system alpha ta g. Li kewi se , th e gr oup se lec t mod e i s i ndi ca ted by an
underline in the left-most position of the group alpha tag (see
following illustratio n).

System Select

Mode

Group Select

Mode

Select Mode Indication With Alpha Tag Display

17

GENERAL OPERATION

The current mode remains selected until the menu mode is
selected or transceiver power is cycled. The programmed default
mode is then selected if applicable.

Setting Squelch Control

NOTE: This sets the squelch level used for conventional calls. The
squelch level for L TR-Net and LT R cal ls is preset and not affected by
this adjustment. For more information on operating modes, refer to
page 19.

If conventional systems are programmed, the squelch level can
be set if the FCN option switch is enabled. Proceed as follows:

1. Select a con ventional syst em and a group t hat is not busy. T ake the

microphone off-hook to enable monitoring.

2. Press the FCN switch and then rotate the Select switch as you

would a normal squelch control. Rotate it counterclockwise until
receiver noise is heard and then clockwise slightly past the point
where the noise mutes. The squelch adjust mode is indicated by

“SQUELCH” on the upper line of the display, and the relative
squelch level is indicated by a bar graph on the bottom line.

3. To select the current level and exit this mode, press the Select

switch. This also occurs automatically 2 seconds after no change
is made or 8 seconds after no activity.

4. If both narrow and wide band channels are used, perform this

adjustment on both typ es because separate setti ngs are maintained.

NOTE: Some readjustment may be required if weak messages are
not heard or unsquelching occurs when no messages are present.

Microphone Off-Hook Detect

Microphone off-hook detection can be disabled by program­ming. Taking the microphone off-hook then does not disable scan-

18

GENERAL OPERATION

ning (see page 35) or enable conventional channel monitoring (see
page 44).

LTR-Net, LTR, and Conventional Operation

Introduction

Each selectable system can be programmed for LTR-Net, LTR,
or convention al op er ati on. The type of ope rat io n that is programmed
is determined by the radio equipment being used by your system
operator. There are only a few differences in operation that are of
concern to the user. These differences are described in the following
information and also noted elsewhere in this manual as required.

LTR-Net and LTR Operation

The LTR-Net and LTR modes provide automatic channel selec­tion and monitoring before transmitting. Special tones and display
messages indicate busy and out-of-range conditions, and telephone
calls can be placed almost as conveniently as with your home
telephone.

Selecting a system selects a collection of up to 99 groups, and
selecting one of these groups selects an ID code which determines
the type of call (standard group, telephone, or special). In addition,
with standard group calls, it determines the specific mobile or
mobiles being called and what calls are received. Priority groups
may also be progra mmed whic h allow a dditi onal ca lls to be r eceiv ed
(see page 41).

The LTR-Net operating mode provides the most operating
features. Exclusive LTR-Net features include roaming and auxiliary
calls such as Unique ID and Directed Group. Calls can be made to
mobiles in your site or some other site. LTR-Net and LTR features
are described starting on page 40.

19

GENERAL FEATURES

Conventional Operation

In the conventional mode, selecting a system selects a specific
radio channel, and selecting a group selects the special Call Guard
squelch coding (if used) and other unique channel parameters such
as call indicator operation. The Call Guard coding determines the
mobile or group of mobiles being called and also the mobiles from

which calls are received (see “Call Guard Squelch” on page 47).

In the conventiona l mode, a busy condition is detecte d automat­ically if the Transmit Disable On Busy feature is used. Otherwise, it
must be detected manually as described in “Monitoring Before
Transmitting” on page 44. Busy and no access conditions cannot be
detected with conventional signaling, so are not indicated by special
tones or display messages. Refer to “Operation At Extended Range”
on page 54 for information on how to determine if an out-of-range
condition may exist.

GENERAL FEATURES

Bank Select

A bank is a collection of selectable systems that have been set
up for a specific application. For example, one bank could be
programmed for operation in Minneapolis and another for operation
in Milwaukee. Each bank is identified by a unique alpha tag, and up
to sixteen banks can be programmed.

Banks are selected by the BANK SEL menu parameter or
BANK option switch. In the menu mode (see page 33), rotate the
Select switch to display “BANK SEL” on the top line and the
current bank is then displayed on the bottom line. Press the Select
switch to change the bank. If using the option switch, when “BANK
SEL” is displayed on the top line, simply press the Select switch to
select the desired bank. If neither the menu parameter nor the option
switch is available, banks are not selectable.

20

GENERAL FEATURES

Call Indicator

The call indicator is “C” in the upper part of the display (see
following illust ra ti on). The purpose of this i ndi cat io n is to show that
a call was received while you were away from the vehicle. Indi­vidual groups can be programmed for this feature and it then turns
on when a call is received on one of those groups.

Call

Indicator

This indicator is turned off by pressing any button or cycling
transceiver power. If scanning and the “Last Received” configura­tion is programmed (see “Transmitting In The Scan Mode” on
page 39), the system and group of the last call are displayed. Other­wise, the currently selected system/group is displayed.

Emergency Switch

If the EMER option switch is programmed (see page 33), it is
used to quickly select the emergency system/group that has been
programmed in the current bank. The emergency call must then be
manually transmitted by pressing the PTT switch (automatic trans­missions do not occu r) . Scann ing continues if it is enabled, and calls
are received normall y on other sys tems and groups if appli cab le.

Encryption

Encryption is an optional feature that prevents conversations
from being monitored by casual eavesdropping and analog
scanners. It does this by encrypting your voice so that it can be
understood only by someone using a transceiver equipped with a
similar encryption device.

Encryption is enabled and disabled by the ENCRYPT menu
parameter or ENCPT option switch (see page 33). If this menu

21

GENERAL FEATURES

parameter or option switch is not available, encryption may be fixed
in the enabled mode by programming. When encryption is enabled,

is indicated in the upper part of the display (see page 14).

To transmit an encrypted call, encryption must be enabled as
just described and the selected group must be programmed for
encryption. Encrypted calls are always received regardless of the
currently selected encryption mode and group programming (if the
radio is equipped with encryption). When transmitting an encrypted
call, wait approximately 1 second before speaking. This gives the
receiving transceiver time to establish synchronization which
ensures that all of the first word is received. If the proceed tone is
used and an encrypted call is transmitted, two beeps instead of one
sound and the tone is automatically delayed for the required time.

Function (FCN) Switch

If an option swit ch is programme d for FCN (funct ion), it sel ects
the following features. When the function select mode is active,

“FCN” is displayed on the lower lin e of the disp lay. This mode is
automatically exited 2 seconds after a change is made or 8 seconds
after no activity.

Menu Mode Select

- Pressing FCN twice or the Menu option switch

selects the menu mode as described on page 33.

Home System/Group Select

- Pressing FCN and then the Select

switch or the HOME op tion switc h selects the home syst em/group as
described in the next section.

Squelch Adjust

- Pressing FCN and then rotating the Select switch

with a conventional system selected sets the squelch level as
described on page 18.

Home System/Group Select

To select the preprogrammed Home system/gr oup, simply pre ss
the FCN switch and then the Select switc h. Alterna tively, press the

22

GENERAL FEATURES

HOME option switch if it is programmed. The Home system/group
is then displayed and it becomes the selected system/group. If no
home system/group or FCN or HOME option switch has been
programmed, this func ti on i s not available. A di fferent home sy ste m /
group can be programmed for each bank.

Horn Alert

NOTE: The horn alert feature is not be available with some early
models.

If this feature has been installed by your system operator, it
activates an external alert such as the vehicle horn or lights when a
call is received on a group programmed for horn alert. When the
horn alert is enabled, is displayed as shown in the following
illustration.

Horn Aler t

Enabled

When enabled, the horn alert pulses on and off for 1-8 cycles
and then goes back to the disabled state. To change the currently
selected horn alert mode, the HRN ALRT menu parameter can be
used if available (see page 33).

The horn alert is programmed to operate in the manual or auto­matic mode (see descriptions which follow). If the ignition switch
does not control transceiver power, only the front panel power

switch affects operation when applicable. Refer to “Power Turn-Off
Delay” on page 24 for more information.

Manual Off/On Mode

The horn alert mode does not change when power is turned on
and off by either the ignition switch or power switch. Therefore, the
horn alert is entirely controlled by the HRN ALRT menu parameter.

23

GENERAL FEATURES

Auto Off/On Mode

Ignition Switch - The horn alert always turns off when the ignition
switch is turned on, and alway s turns on when the igni tion switch is
turned off (if there is a turn-off delay).

Power Switch

- The horn alert always reverts to the off condition

when power is turned on by the power switch.

NOTE: The preceding automatic operation overrides any mode that
may have been selected by the HRN ALRT menu parameter.

Option Select

The AUX switch or OPTION menu parameter can be used to
control an accessory that may have been installed by your system
operator. The enabled condition is indicated by in the display.

Power Turn-Off Delay

Your transceiver may have been installed so that the vehicle
ignition switch as well as the front-panel power switch control trans­ceiver power. If this is the case, both the ignition switch and the
front panel power switch must be on for transceiver power to turn
on.

When the ignition switch controls power, turn-off delays of
Immediate, 10, 20, 30, 40, or 50 minutes, 1, 2, 4, 8, 10, 12, or 16
hours or Forever can be programmed. The delay can be overridden
at any time by turning power off using the front-panel power switch
or turning the ignition switch back on.

A power turn-of f delay all ows featur es such as the ca ll indic ator
to remain active for a time after the ignition switch is turned off. A t
the same time, advantages of ignition switch control are utilized
such as preventing battery discharge that may occur if the trans­ceiver is accidentally left on for an extended period (see page 54).

24

GENERAL FEATURES

Proceed (Clear-To-Talk) Tone

This is a short tone that sounds shortly after the PTT switch is
pressed to indicate that the radio system has been accessed and
speaking can begin. The transceiver can be programmed so that this
tone sounds on LTR-Net and LTR systems but not conventional
systems. In addition, this and other tones can be disabled on all

systems by the TONES menu parameter (see “Tone Select” on
page 26) or system operator programming.

On LTR-Net and L TR syst ems, if the radio sys tem is busy when
making a call, the busy tone sounds instead of the proceed tone and
“BUSY” is indicated on the bottom line of the display. If an access
attempt is unsuccessful, such as because of an out-of-range condi­tion, the intercept tone sounds and “NO ACCES” is indicated in the
display. When the “NO ACCES” condition, the PTT switch must be
released to make another c all attempt. Re fer to page 47 for more
information on the busy and intercept tones.

On conventional systems, the Transmit Disable On Busy
feature can be used to automatically perform monitoring (see
page 46). The proceed tone then does not sound if the channel is
busy. Otherwise, the proceed tone (if enabled) sounds on conven­tional systems even if the channel is busy. If encryption is used, two
tones sound instead of one to indicate that an encrypted call is being
transmit ted. With other calls, a stan dard (single beep) or distinctive
(3-beep) tone may be used. With special and telephone calls, the
proceed tone may sound on only the initial access.

Receive-Only Groups

Any group can be programmed for monitoring only (transmit­ting is disabled). If the PTT switch is pressed with one of these
groups selected, the intercept tone sounds and “TX DISBL” is
displayed.

25

GENERAL FEATURES

Stealth Mode

The stealth mode disables the following tones and indicators so
that they do not r eveal that you are transmi tting or ot herwise indi cate
your presence. The s pea ker audi o and display remain enabl ed i n thi s
mode.

• All tones (see “Tone Select” on page 26)

• The front panel transmit/busy indicator (see page 11)

• Display backlight

The stealth mode can be selected by the STEALTH menu
parameter (see page 33), or is fixed in the on or off mode by
programming. There is no special indication that this mode is

selected excep t th at “ On ” is disp la yed under “STEALTH” when it is
selected by the menu mode.

Time-Out Timer

The time-out timer disables the transmitter if it is keyed contin­uously for longer than the programmed time. It can be programmed
for 0.5 - 5.0 minutes or disabled entirely. If the transmitter is keyed
continuously fo r longer than the programm ed time, th e trans mitter is
disabled, “TIMEOUT” is indicated on the lower line of the display,
and the intercept tone sounds. The timer and tone are reset by
releasing the PTT switch.

One use of the time-out timer feature is to prevent a repeater
from being kept busy for an extended period by an accidentally
keyed transmitter. It can also prevent possible damage to the trans­mitter caused by transmitting for an excessively long period.

Tone Select

If the TONES menu parameter is selecta ble, the tone s that
sound can be selected. Otherwise, the tones that sound are fixed by
programming. The following choices are availabl e. Re fer to page 33
for more information on using the menu mode.

26

STANDARD GROUP CALLS

Silent - All tones are disabled.
Keys - Only the Select switch and key press tones are enabled.
Alerts - All tones except the preceding Key Beep tones are enabled.
All - Both the Key Beep and Alert tones are enabled.

Transmitter Thermal Foldback

If the transmitter temperature inc reases to the point where
damage to the transceiver could result, power is automatically cut
back. When this happens, the transmit indicator on the front panel is
orange instead of red when the transmitter is keyed. After sufficient
cooling occurs, power output automatically returns to the normal
level and the indicator changes back to red. One time when this indi­cation could occur is if you transmit for an extended period.

STANDARD GROUP CALLS

General

Most calls you make are probably the standard group type
described in this section. These calls are between you and another
mobile or control station. The main difference between these calls
and the other types that can be placed is that no number is dialed
using a keypad. The fol lowing procedur e appli es to al l thr ee types of
operation (LTR-Net, LTR, and conventional).

Placing a Standard Group Call

1. Turn t ransceiver power on and set the volu me as described starting

on page 15. With conventional operation, also make sure that the
squelch is properly set as described on page 18.

2. Select the system and group of the mobile being called as

described starting on page 17.

3. If a conventional call is being placed, monitor the channel

manually or automatically as described on page 44.

27

STANDARD GROUP CALLS

4. Press (and hold) th e microphone PTT (push-to-talk) switch to talk

and release it to listen. Ope ration with LTR-Net, L TR, and conven­tional calls is as follows:

LTR-Net and LTR Operation

• If the proceed tone is enabled (see page 25), it sounds shortly

after the PTT switch is press ed i f t h e ra dio system was success­fully accessed. If it is not enabled, no tone sounds when the
system is successfully accessed. The proceed and other tones

can be disabled as described in “Tone Select” on page 26.

• If the radio system is busy, the busy tone sounds (see page 47)

and “BUSY” is indicate d on the lower li ne of the displa y. Addi­tional access attempts are made as long as the PTT switch
remains pressed.

• If the radio system could not be accessed because of an out-of-

range condition or some other re ason, the intercep t tone sounds

(see page 48) and “NO ACCES” is indicated on the lower line
of the display. The PTT switch must then be released and
pressed again to make another access attempt.

• When respondi ng, busy or no acc ess condi tions may a lso occur

the same as when placing a call because the system is
re-accessed for each transmission with these calls.

Conventional Operation

• If the cha nnel is busy and the T ransmit Disable On Busy feature

is programmed (see page 46), “DSBL BSY” is indicat ed on the
lower line of the display and the transmitter is disabled. Any
channel activity is heard while the PTT switch is pressed.

• Otherwise, busy and out-of-range conditions are not indicated

and speaking can begin when the PTT switch is pressed (if the
channel is not busy). If the proceed tone is enabled on conven­tional systems, it indicates when speaking can begin but does

28

TELEPHONE CALLS

not indicate that the radio system has been successfully
accessed.

5. When the call is complete, place the microphone back on-hook.

Receiving a Standard Group Call

1. Select or scan the system and group programmed for the call you

want to receive (see page 35 for scan information).

2. When the message is received, the display usually changes to the

system and group of the call. Take the microphone off-hook and
press the PTT switch to talk and release it to listen. If scanning, a
response may not automatically occur on the group of the call.

Refer to “Transmitting In The Scan Mode” on page 39 for more
information.

TELEPHONE CALLS

General

NOTE: Telephone calls can be placed and received only if that
service is available to you and your transceiver has been
prog rammed appropriately. In addit ion, a micr op hone equipped with
a telephone keypad is required to dial the telephone number.

The telephone calling feature allows you to place and receive
telephone calls using your transceiver. The following information
describes how these calls are made with LTR-Net and LTR opera­tion. If you can make telephone calls with conventional operation,
the procedure may be somewhat different and your system operator
will then provide additional information. Proceed as follows:

Placing Telephone Calls

1. Turn t ransceiver power on and set the volu me as described starting

on page 15. Select the group programmed for telephone calls. To

29

TELEPHONE CALLS

quickly select th e telephone group in the current system, press the
TEL option switch as described on page 41. When a group
programmed for telephone calls is selected, is displayed.

2. T o obtain the d ial tone, briefly press the P TT switch. If the proceed

tone is used (see page 25), press the PTT switch until this tone
sounds. If a dial tone is then heard, proceed to step 4. Busy or no
access condi tions may a lso b e ind icate d the same as desc ribed for
standard group calls on page 28.

3. Wit h the dial tone sou nding, dial the numbe r using the 0-9 keys on

the microphone keypa d. If the microphone has a memory, you may
also be able to recall the number from memory. The PTT switch
does not need to be pressed while dialing if the transmitter auto­matically keys. If too much t ime elapses between digi ts, the cal l is
terminated.

4. After the number is dialed, release the PTT switch (if it was

pressed). With LTR-Net operation, a short tone then sounds to
indicate that the number was accepted by the system. Landside
ringing (or a landside busy condition) should then be heard.

5. When the other party answer s, pres s the PTT switch and respond.

The PTT switch must be pressed to talk and released to listen the
same as with mobile-to-mobile calls.

6. When the call is finished, it should be terminated. This is usually

done by transmitting either the # or # characters, and termina-

X

tion is indicated by three beeps. Terminating the call in this
manner prevents extra billing that may occur while the system
automatically detects the end of the call.

Receiving a Telephone Call

1. Select or scan the system and group programmed for telephone

calls. To quickly select the tele phone gr oup in t he cur rent s ystem,
press the TEL opt ion s witch. When a telep hone gr oup is selec ted,

is displayed.

30

LTR-NET AUXILIARY CALLS

2. When “ringing” is heard, press the PTT switch and respond. The

P TT sw itch must be pressed to tal k and rel eased t o listen t he same
as with standard calls.

3. When the call is f inished, it should be ter minated as in step 6 of t he

preceding section.

Landside-Originate Telephone Calls

If telephone calls can be placed, then it is usually possible to
receive telephone calls from a landside telephone. With some radio
systems, each mobile is assigned a unique telephone number so that
it can be dialed di rectly. With others, the number of the radio sys tem
is dialed and then when a tone sounds, the number specifying the
mobile being called is dialed using a tone-type telephone. The
mobile user hears “ringing” when the call is received. Contact your
system opera tor fo r the nu mb er to d ial an d more info rmati on on how
to place these calls.

LTR-NET AUXILIARY CALLS

General

The LTR-Net Auxiliary calls include Unique ID and Directed
Group calls (see page 42). Unique ID calls are to specific mobiles,
and Directed Group calls are to specific talk groups. These calls can
be placed to mobiles in your site or some other site that is part of
your radio network.

As with telephone calls, a special number must be dialed to
place these calls. Therefore, a microphone with a telephone keypad
is required. The number dialed is 1-10 digits long, and is provided
by your system operator. Other requirements to place these calls are
you must be authorized to make them and your transceiver must be
appropriately programmed.

31

LTR-NET AUXILIARY CALLS

Placing LTR-Net Auxiliary Calls

1. Select the LTR-Net system and group programmed for Auxiliary

calls. When a group p rogrammed for these call s is se lected, is
indicated in the upper part of the display. The group alpha tag
displayed on the lower line may also indicate when one of these
groups is selected.

2. To obtain a dial tone, briefly press the PTT switch. If the proceed

tone is enabled, hold the PTT switch until this tone sounds. Busy
or no access conditions may also be indicated the same as
described for standard group calls on page 28.

3. A 1-10 digit number is dialed which specifies the destination of

the call. Refer to step 3 on page 30 for more dialing information.

4. A tone then sounds to indicate that the call was accepted by the

system. If this tone does not sound, an unauthorized or incorrect
number may have bee n dialed. The call th en proceeds as fol lows .
If all system resources are busy, the call is placed in a queue as

described in “Busy Queuing” on page 42.

Unique ID Call - Ringing is heard to indica te that th e other trans ­ceiver is being rung. If there is no answer, ringing automatically
stops after sev eral rings and the call is terminated. Whe n the other
party answers, respond as with a standard call.

Directed Group Call - A second tone sounds to indicate th at the
path is complete and speaking should begin. No ringing occurs.

5. When the call is complet e, it should be ter minated by trans mitting

either the # or # characters. Three beeps indicate that the call

X

has been terminated.

Receiving Auxiliary Calls

To receive a Unique ID call, all that is required is that an LTR­Net system containing a group programmed for those calls be

32

OPTION SWITCHES AND MENU MODE

selected. To receive a Directed Group call, the group of th e cal l may
need to be selected or scanned. A Unique ID call is indicated by a

“ringing” tone similar to telephone calls, and a Directed Group call
is indicated by the caller’s voice the same as with standard group
calls.

The transceiver may be programmed so that responses always
occur on the last selected group. In this case, the group may need to
be manually changed to respond to these calls (see “Transmitting In
The Scan Mode” on page 39). Unique ID and Directed Group calls
can also be pl ac ed from a landside te lephone. The same number s are
dialed as when the call is mobile originated. Contact your system
operator for more i nformation.

OPTION SWITCHES AND

MENU MODE

Option Switches

All five option switches on the front panel are programmable
by your system operator. The available option switch functions are
indicated by an entry in the “Option Switch” column of the table on
the next page. More information on each function can be found on
the page indicated in this table. Some functions may be controlled
by both the menu mode and an option switch. The function
controlled by each switch may be indicated on the switch key cap.
Some switches may not be used or may have a blank key cap.

Menu Mode Introduction

The menu mode is se lec te d by pre ss ing the Menu option switc h
(the labe l may vary) or the FCN switch twice. If neither of these
switches is programmed, the menu mode is not available. Functions
which can be controll ed by the menu mode a re indica te d by an entry
in the “Men u Items” column of the preceding table. More informa­tion on each function can be found on the page indicated in this

33

OPTION SWITCHES AND MENU MODE

table. Some parameters may not be displayed because they are not
used or are in a fixed state or controlled by an option switch. Calls
cannot be received or transmitted while the menu mode is selected.

Menu Mode and Option Switch Functions

Option

See Descrip.

Function Menu Items

Switch

on Page

Add/delete (scan list prg) A/D 38
Backlight adjust BACKLGHT 16
Bank select BANK SEL BANK 20
Display mode select SG DISPL 16
Emergency sys/grp select EMER 21
Encryption on-off ENCRYPT ENCPT 21
Function select FCN 22
Home system/group

select

HOME 22

FCN then

press Sel Sw
Horn Alert on-off HRN ALRT 23
Menu mode select MENU 33

FCN (twice)
Option select OPTION AUX 24
Roaming on-off [1] ROAMING ROAM 43
Scan on-off SCAN 35
Scan type select SCN TYPE 35
Scan continue on-off SCN CONT 39
Scan list save mode SCN SAVE 38
Stealth mode select STEALTH 26
Squelch adjust FCN then

Telephone group select TEL 41
Tone type select TONES 26

NOTES: Functions left blank are not available.

[1] Available with LTR-Net operation only.

34

18

rotate Sel Sw

SYSTEM AND GROUP SCANNING

Using Menu Mode

1. T o select the menu mode, pre ss the Menu switch or FCN FCN (the
FCN switch twice). The top line of the display indicates the func­tion being edited, and the bottom line indicates the current status
of that function (see following illustration).

Function

Status

2. To display the various f uncti ons t hat a re co ntrolla ble b y th e menu
mode (top line indicat ion), r otate the Selec t switch. The cu rrent ly
selected status of that function is displayed on the bottom line.

3. To change the selected status, press the Select switch. The selec­tions displayed for each menu function are shown on page 52.

4. The selected status conditions for the various functions are saved
when the menu mode is exited in one of the following ways:

• Pressing the FCN switch again

• Pressing the PTT switch

• Automatical ly when time-out o ccurs 2 second s after a c hange is

made or 8 seconds after no changes are made.

SYSTEM AND GROUP SCANNING

General

Introduction

The scan feature monitors, in sequence, the programmed
systems and/or groups in the scan list. When a message is detected
that the transcei ver is progr ammed to receive , scanning st ops and the

35

SYSTEM AND GROUP SCANNING

message is recei ved. Shor tly af ter t he message is compl ete, sca nning
resumes (unles s it has been disab led). Scann ing is se quential through
the programmed systems and groups. System and group scanning
operate as follows:

System Scanning

- Detects calls on all systems that are in the
system scan list. When system scanning is not used, calls are
detected on only the currently selected system.

Group Scanning

- Detects calls on the selectable groups in the
current or scanned systems that are in the group scan list. When
group scanning is not used, calls are detected on only the
currently selected group or if system scanning, on the last
selected group of each system.

Scan On-Off

System and/or group scanning are turned on and off by the
SCAN option switch. When system and/or group scanning is
enabled by this switch, is indicated in the display (see following
illustration). Then when system or group scanning is actually occur­ring, a scrolling underline is displayed under each character in the
upper line of the display. The microphone must be on-hook for scan­ning to occur (unless off-hook detection has been disabled as
described on page 18).

System Scan List Group Scan List

System or Group

Scanning Selected

36

System or Group

Scanning Occurring

SYSTEM AND GROUP SCANNING

Scan Types

The type of scanning selected is determined by the menu mode
SCN TYPE parameter (see page 33). If it is not selectable, the type
of scanning is fixed by pr ogramming. The av ailable sc an types ar e as
follows.

SYSTEMS - Both system and group

GROUPS - Group scanning only

OFF - Both types disabled (SCAN switch non-functional)

If the SCAN option switch is not programmed, the selected
mode is always enabled. If both the switch and SCN TYPE menu
parameter are disabled, the scan mode and type are fixed by
programming. The selected system and group can be changed while
scanning using the Select switch in the normal manner. Scanning
resumes shortly after the change is made.

When a call is recei ved in the sc an mode, the dis play changes to
the system and group of the call. Programming determines if this
change is temporary or permanent, and if a response occurs on the
system/group of the call or the selected system/group. Refer to

“Transmitting In The Scan Mode” on page 39 for more information.

LTR-Net Mode Scanning

When system scanning with an LTR-Net system selected and
roaming disabled, only the LTR-Net systems in the scan li st that
access the site of the selected system are scanned. LTR and conven­tional systems are not scanned.

When system scanning with roaming enabled, registration on
other sites occurs normally and scanning operates as just described.
However, if the current LTR-Net site is lost and no other LTR-Net
site can be located, the LTR and conventional systems in the s can list
are also scanned. If an LTR-Net site is again detected, regis tration on
that site occurs and the LTR and conventional systems are no longer
scanned. This can provide uninterrupted operation in areas which
have not been converted to LTR-Net operation.

37

SYSTEM AND GROUP SCANNING

LTR and Conventional Mode Scanning

When an LTR or conventional system is selected with system
scanning enabled and roaming disabled, scanning is sequential
through only the LTR and conventional systems in the scan list
(LTR-Net systems are not scanned). If roaming is enabled, all three
system types are scanned as described in the preceding LTR-Net
description. Therefore, LTR and conventional systems are not
scanned while on LTR-Net site.

Scan List Programming

General

NOTE: The selected (displayed) system and group are always
scanned even if they have been deleted from the scan list.

The system and gr oup sca n l is ts ar e pr ogr ammed u si ng t he A/D
(add/delete) opt ion swit ch. Press ing thi s switch changes th e stat us of
either the displayed system or group, depending on whether the
system or group select mode is active. This is the same select mode
used for system and group selection as described on page 17. For
example, to change the scan list st atus of t he displ ayed syst em, press
the Select switch if necessary so that the system select mode is indi­cated and then press the A/D switch.

The displayed system is in the scan list and scanned normally
when is displayed. Likewise, the displayed group is in the scan list
and scanned normally when is displayed (see preceding illustra­tion). Deleting a system only temporarily deletes the groups associ­ated with that system. When a system is added back into the scan list,
the original group scan list is again active.

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
switch in the normal manner. Scanning resumes shortly after the
system or group is deleted. Scan list programming is not available if
the A/D switch is not programmed.

38

SYSTEM AND GROUP SCANNING

Saving Scan List

If the menu mode SCN SAVE parameter is available, you can

select if scan list changes are saved. If “On” is selected, changes are
saved as they are made and the scan list is the same when power is
turned on. Conversely, if “Off” is selected, they are not saved and the
default scan list status of all systems and groups is reselected when
power is turned on. If the menu SCN SAVE parameter is not select­able, the scan list save mode is fixed in one of these states.

Scan Delay and Continue Timers

When a message is received or transmitted while scanning, there
is a short delay before scanning resumes. The delay after receiving a
call prevents another message from being received before a response
can be made. Likewise, the delay after transmitting a call ensures that
you hear a response to your call instead of another message occurring
on some other system or group. Scanning does not resume if it has
been disabled, such as by taking the microphone off-hook.

There is also a scan continue timer that may be programmed.
This timer controls the maximum time that a call is received before
scanning resumes. Times up to 60 seconds can be programmed. This
prevents scanning from being delayed for long periods by lengthy
calls. If the menu SCN CONT parameter is selectable (see page 33),
this feature can be turned on and off.

Transmitting In The Scan Mode

General

When the transmitter is keyed in the scan mode, programming
determines if the transmission occurs on the last selected or last
received system/group. The display usually indicates the system/
group on which a transmission would occur. The exceptions are
noted in the following information. The three programmable config­urations are as follows.

39

LTR-NET AND LTR FEATURES

Last Selected - Transmissions always occur on the system/group
that was last selected by the Select switch. Therefore, the display
may not indicate the system/group on which a response occurs. To
respond to a call not on the selected system/group, first select the
system/group of the call using one of the following methods:

• Select it manually using the Select switch.

• Before scanning resumes, exit the scan mode by pressing the

SCAN switch. The system/group of the call then becomes the
selected system/group and it is not necessary to change it
manually.

Last Received - The selected system/group changes to the system/
group of a call. Therefore, you can always respond to a call without
having to manually change the system/group. To return to the previ­ously selected system/group, it must be manually selected using the
Select switch.

Temporary Last Received - The system/group changes to the
system/group of a call for only the duration of the scan delay period
(see page 39.) Then when the delay exp ires and sc anning resumes (if
it is not disabled), the selected system/group is again displayed.
Therefore, you can respond to a call without changing the selected
system/group as long as you do so before scanning resumes.

LTR-NET AND LTR FEATURES

Transmit Inhibit

The Transmit Inhibit feature prevents the transmitter from
keying if the mobile you are calling is busy with another call. When
the transmitter is disabled by this feature, the intercept tone sounds

and “TX INHIB” is displayed (see following illustration). To make
another call attempt, the PTT switch must be released and pressed

40

LTR-NET AND LTR FEATURES

again. However, you may want to wait a few seconds before making
another attempt because a timer must time out before another
attempt will be successful. A similar Transmit Disable On Busy
feature is available on conventional systems (see page 46).

Calls on Priority ID Codes

With LTR-Net and LTR systems, each selectable group is
programmed with a receive priority number. If a call with a higher
priority is detected while receiving a call, th e current ca ll is immedi­ately dropped and the higher priority call is received. System or
group scanning does not need to be enabled for this to occur. Some
groups, such as those used to make telephone calls, may be
programmed as not inte rrupt ible so th at calls on t hose grou ps are not
interrupted by other call s.

The system/group of the higher priority call is displayed while
it is received. The programming of the Last Selected/Last Received/
Temporary parameter described on page 39 determine s i f the change
is temporary or permanent and if a response occurs on the displayed
or last selected system/group.

Telephone Group Select

If the TEL option switch is pr ogrammed (see pag e 33), it can be
used to quickly select the group programmed for telephone calls in
the current system. When a telephone group is selected, is
displayed (this icon is also displayed if an LTR-Net Auxiliary call
group is selected). If more than one group is programmed for tele­phone calls, the first higher numbe red tel ephone gro up is sele cted. If
there is no telephone group or a conventional system is selected,

“NO PHONE” is displayed and an error tone sounds.

41

LTR-NET FEATURES

LTR-NET FEATURES

NOTE: Other LTR-Net features are described starting on page 40.

LTR-Net Standard and Special Calls

The LTR-Net Special and Auxiliary calls are shown below.
Refer to the descriptions which follow for more information.

Telephone

Special

Auxiliary

Unique ID
Directed Group

Standard Grou p Calls

- Standa rd group calls ar e between two mobi les
or between a mobile and a control stati on. To place these calls in the
LTR-Net or LTR mode, simply select the desired group and press the
PTT switch. The procedure for placing and receiving these calls is
described starting on page 27.

T elephone Calls

- These calls al low you to make telephon e calls using

your transceiver, and they are described starting on page 29.

Auxiliary Calls

- As shown in the preceding illustration, Auxiliary
calls include Unique ID and Directed Group calls. Unique ID calls
allow calls to be plac ed to sp ecific mobiles, and Dir ected Gro up calls
allow calls to be placed to specific talk groups. Auxiliary calls are
described starting on page 31.

Busy Queuing

Queuing may be provi ded by t he ra dio sys tem wh en plac ing th e
special calls described in the preceding section if system resources
are not available for the call. Standard group calls are not queued.
When a call is placed in a queue, a voice message informs you that
this has occurred. Then when resources become avail abl e, the cal l is
automaticall y pl aced and the normal rin gin g or other tones are h ear d
if applicable. If the call cannot be placed in the allotted time, it is
terminated and another message informs you that this has occurred.

42

LTR-NET FEATURES

Roaming

LTR-Net radio localities (sites) can be linked together to
provide wide area coverage. Then as you travel from locality to
locality wit h r oamin g enabled, calls ar e au toma ti cal ly routed to you r
current location. Both standard group and special calls may be
routed to other localities. To utilize the Roaming feature, proceed as
follows:

1. An LTR-Net system must be selected. When an LTR or conven-

tional system is selected, roaming is disabled.

2. Roaming must be enabled by the ROAM option switch or

ROAMING menu parameter (see page 33) if available. When

roaming is enabled and disabled by the option switch, “ROAM
ON” and “ROAM OFF” are momentarily disp layed. If neithe r the
menu parameter nor option switch is avail able, roaming is fixed in
the on or off mode by programming.

3. Scanning does not need to be enabl ed. If it is , an LTR-Net system

must be selected.

When roaming is enabled as just described and the signal from
the current locality becomes weak, the transceiver automatically
begins searching for another locality. While searching is occurring,
“LCL SRCH” is displayed as shown below. Then when a new
locality is locat ed, re gistr atio n occur s and “L CL SRCH” i s no lo nger
displayed. The displayed system is the next LTR-Net system
programmed with a different localit y th at could be accessed, and the
displayed group is usually the group that was displayed before
roaming occurred.

43

LTR FEATURES

LTR FEATURES

NOTE: Other LTR features are described starting on page 40.

Standard Group Calls

Standard group calls are between two mobiles or between a
mobile and a control station. To place these calls in the LTR or LTR­Net mode, simply se lec t t he des ir ed group and press th e PTT switch.
The procedure for placing and receiving these calls is described
starting on page 27.

Telephone Calls

Telephone calls allow you to place and receive calls over the
public telephone system using your transceiver. LTR and LTR-Net
telephone calls are described starting on page 29.

CONVENTIONAL FEATURES

Monitoring Before Transmitting

General

Regulations require that conventional groups (channels) be
monitored before transmitting to make sure that they are not being
used by someone else. If you were to transmit when someone else is
talking, you would probably disrupt their conversation. In the LTR­Net and LTR modes, monitoring is performed automatically. In the
conventional mode, it must be performed automatically or manually
as follow s.

Automatic Ch annel Monito ring

If the selected group is programmed for the Transmit Disable
On Busy feature (see page 46), monitoring is performed
automatically.

44

CONVENTIONAL FEATU RES

Busy Indicator

If the group is not automatically monitored as just described, it
must be monitored manually. The simplest way to do this may be to
note if a busy cond ition is indi cated by th e front pan el multi-func tion
indicator (see page 11). With scanning disabled and the squelch
control properly adjusted (see page 18), note if this indicator is
lighted gree n. I f it i s, a s ig nal i s b ein g d ete ct ed on the selecte d group
(channel) and you should not transmit a message until it turns off.

Monitor Mode

There may be times when the Bus y indica tion is dis played even
though no one is using the channel. Monitoring should then be
performed using the monitor mode. This mode is enabled by taking
the microphone off-hook, and is indicated by in the display as
shown in the following illustration. The monitor mode temporarily
disables Call Guard squelch (see page 47) and other squelch control
techniques and also scanning so that all messages on the group are
heard.

Monitor Mode

Selected

The transceiver may be programmed so that the microphone
off-hook condition is not detected. The monitor mode is then not
enabled when the microphone is taken off-hook. The Transmit
Disable feature then may be used on all conventional groups so that
manual monitoring is not required.

Monitoring may also be selectively disabled on each group by
programming. Taking the microphone o ff-hook then d oes not ena b l e
monitoring on tha t group and mon itori ng is a lways pe rformed by the
Transmit Disable On Busy feature.

45

CONVENTIONAL FEATURES

A conventional system must be selected to enable monitoring.
If the microphone i s t aken off-hook with an LTR-Net or LTR system
selected, scanning halts (unless off-hook detection is disabled) but
monitoring is not selected.

Transmit Disable On Busy

The Transmit Disable On Busy feature automatically disables
the transmitter if the selected group (channel) is busy and it has not
been monitored when the PTT switch is pressed. When the trans­mitter is disabled by this feature, the busy tone sounds briefly and

“DSBL BS Y” is indic ated on the lower line of the display.

While the PTT switch is pressed, the receiver is enabled so that
activity on the channel can be monitored. The PTT switch must be
released and then pressed again to make another call attempt. Occa­sionally, a busy condition may be detected even though no one is
talking. To key the transmitter in this case, release the PTT switch
and then immediately press it again.

There is also a programmable option with this feature to allow
transmitting with a busy channel if the correct Call Guard signal is
detected. The Transmit Disable On Busy feature is enabled or
disabled on each conventional group by dealer programming. If this
feature is disa bled or if monit oring has bee n perfo rmed by ta king t he
microphone off-hook, the transmitter keys even if the group is busy.

Talk-Around

Normally, all transmissions go through a re peater whi ch usually
increases range because the repeater transmits at a higher power
level and has a higher antenna. However, this means that if you are
out of radio range of the repeater, you cannot talk to anyone even if
the mobile you are calling is only a short distance away. To allow
communication if this occurs, talk-around groups can be
programmed which enable direct mobile-to-mobile communication
without going through a repeater.

46

MISCELLANEOUS

Talk-around is then automatically selected when one of these
groups is selected. There is no special talk-around option switch or
indicator. However, the group alpha tag on the lower line of the
display may be used to indicate groups programmed for this feature.
Talk-around is not available on LTR-Net and LTR systems.

Call Guard Squelch

The Call Guard s quel ch fe at ure eliminates di st rac ti ng me ss ages
intended for others using the channel. This is done by using a
subaudible tone or digital code to control the squelch. This tone or
code is unique to a user or a group on that channel. It is transmitted
with the voice signal but is not heard because it is in the subaudible
range and attenuated by a filter. Call Guard squelch can be
programmed on each conventional group. LTR-Net and LTR opera­tion uses ID codes to perform a similar function.

MISCELLANEOUS

Supervisory Tones

The following tones are heard at various times when operating
this transceiver. Some or all of these tones can be disabled by the

TONES menu pa rame te r or p rogram ming. Re fe r to “Tone Select” on
page 26 for more information.

Busy Tone

This tone is similar to the standard telephone busy tone, and it
indicates that the radio system is currently busy. The display also
indicates “BUSY” while this tone is sounding. Repeated access
attempts are made while the PTT switch pressed with this tone
sounding. Therefore, it is not necessary to release the PTT switch to
access the system. This tone sounds only with LTR-Net and LTR
calls.

47

MISCELLANEOUS

Intercept Tone

This is a siren-like tone (alternating high and low tones) which
indicates the following no access and error conditions:

• No Access - If this tone sounds shortly after pressing the PTT

switch and “NO ACCES” is displayed, the radio system could
not be accessed, perhaps because of an out-of-range condition
(see “Operation At Extended Range” on page 54). Once this
tone sounds, no more access attempts are made until the PTT
switch is rele ased and then pressed aga in. This condition i s indi­cated only with LTR-Net and LTR calls.

• Time-Out Timer - If this tone sounds after the transmitter has

been keyed for an extended period and “TIMEOUT” is
displayed, the transmitter has been disabled by the Time-Out
Timer feature (see page 26).

• Transmit I nhibi t - If thi s tone sounds as so on as the PTT switch

is pressed with an LTR-Net or LTR system selected and “TX
INHIB” is displayed, the transmitter has been disabled by the
Transmit Inhibit feature (see page 40).

• Receive-Only Group - If this tone sounds as soon as the push-

to-talk switch is pressed and “TX DISBL” is displayed, the
group is receive-only (see page 25).

Proceed (Clear-To-Talk) Tone
which sounds after the push-to-talk switch is pressed to indicate
when talking can begin (see page 25).

Key Press Tone
switch is pressed.

Wrap-Around Tone
highest or lowest channel was displayed and that wrap-around has
occurred.

- This is a short tone that indicates when an option

- This is a two-pitch tone that indicates that the

- This is a short single or double tone

48

MISCELLANEOUS

Error Tone - This is a two-pitch tone that indicates that an error condi-
tion has occurred.

LTR-Net Special Call Tones

The following tones are generated by the LTR-Net equipment
and are heard when making a telephone, unique ID, or directed
group special call on an LTR-Net system.

Confirmation Tone - This is a short tone that sound s when t he num­ber just dialed has been accepted by the system.

Call Proceed Tone - With LTR-Net directed group calls (see
page 32), ringing does not occur after the number is dialed. Instead,
another short tone sounds after th e co nfi rma ti on t one t o i ndi ca te t h a t
the audio path is complete and speaking can begin.

End Call Tone - Three beeps which indicate that the end of the call
has been detected by the system.

Proceed Dialing Tone - When placing a landside-to-mobile tele­phone call (see page 31), the landside caller may enter a special
number which specifies the mobile being called. This tone indicates
when that number should be dialed.

LTR Telephone Call Tones

The following tones are generated by LTR interconnect equip­ment and are heard when making LTR telephone calls.

Reorder Tone - Three beeps which indicate that the call has been
terminated by the syst em.

Return Time Warning 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.

49

MISCELLANEOUS

Conversation T i me-Out Tone - Calls are limited to a cert ai n l engt h

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 transmission.
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 sec. of
hearing this tone, and a tone-type telephone must be used.

Display Messages

The following messages appear in the display to indicate
various operating modes and error conditions.

BUSY - Indicates that th e LTR-Net or LTR radio system is currently
busy (see “Busy Tone” on page 47).

CALL SVC - Indicates that the transceiver is inoperative. Contact
your system operator for service.

DSBL BSY - Indicates that the transmitter is disabled by the
conventional Transmit Disable On Busy feature (see page 46). It
also indicates that the transmitter was keyed while receiving an
LTR-Net or LTR call.

FCN - Indicates that the f uncti on sel ect mod e is selec ted b y the FCN
option switch (see page 22).

LCL SRCH - Indicates that the transceiver is currently searching
for a new locality (site) on which to register (see page 43).

Model - The last seven digits of the tran sce iver part number ar e i ndi ­cated very briefly on the top line of the display when transceiver

50

MISCELLANEOUS

power is turned on. This number indicates such things as frequency
band, power output, and tier of the transceiver. The eighth digit is

reserved and always “0”.
NO ACCES - Indicates that the radio sy ste m could not be accessed,

perhaps because of an out-of-range condition. Refer to “Operation
At Extended Range” on page 54 for more information.

NO PHONE - Indicates that there is no telephone group
programmed in the current system when the Telephone option
switch is pressed (see page 41).

NO POWER - Indicates that the transmitter temperature or supply
voltage is excessive and that the transmitter has been automatically
shut down. Release the PTT switch and allow the transmitter to cool.
If the problem persists, contact your system operator for service.

NOT AUTH - Indicates that an attempt was made to register on a
site where service was not authorized (see page 43).

NOT CONV - Indicates that an attempt was made to enable a
conventional mode feature on an LTR-Net or LTR system.

NOT LNET - Indicates that an attempt was made to enable an LTR­Net mode feature on an LTR or conventional system.

OUT-LOCK - Indicates that the synthesizer is unlocked. Refer to
“Transceiver Service” on page 55 for more information.

PROG ERR - Indicates an EEPROM read error. Refer to “Trans­ceiver Service” on page 55 for more information.

SLEEPING - Indicates that the transceiver has been temporarily
disabled by the system operator. It will be automatically enabled
again when operation can be resumed.

SQUELCH - Indicates tha t the conve nti onal squelch adjust mode is
selected (see page 18).

51

MISCELLANEOUS

TIMEOUT - Indicates that the transmitter has been disabled by the
Time-Out Timer (see page 26).

TX DISBL - Indicates that t he transmi tter has b een disa bled becau se
the selected group is receive-only (see page 25).

TX INHIB - Indicates that the transmitter has been disabled by the
Transmit Inhibit feature (see page 40).

Menu Mode Messages

The following messa ges a re di splayed in the menu mode that is

described starting on page 33. The enabled or “yes” condition is
indicated by “ON”, and the disabled or “no” condition by “OFF”.

BACKLGT - Backlight control

• BRIGHT

• DIM

• OFF

BANK SEL - Bank select

• Bank alpha tag

ENCRYPT - Encryption select

• ON or OFF

HRN ALRT - Horn alert select

• ON or OFF

OPTION - Option on-off

• ON or OFF

ROAMING - LTR-Net roaming on-off

• ON or OFF

SCN CONT - Scan continue on-off

• ON or OFF

52

SCN SAVE - Scan list save

• ON = save, OFF = not saved

SCN TYPE - Selects type of scanning

• SYSTEM - Both system and group

• GROUPS - Group scanning only

• OFF - All scanning disabled

S/G DISPL - System/group display mode

• ALPHA

• NUMERIC

STEALTH - Stealth mode select

• ON or OFF

MISCELLANEOUS

TONES - Beep tones select

• SILENT - All tones disabled

• KEYS - Only Select switch and key press tones sound

• ALERTS - All ton es sound e xcept prece ding Ke y Beep s sou nd

• ALL - All the preceding tones sound

System Operator Programming

As noted several times in this manu al, prog ramming deter mines
the availability and specific operation of many features. This refers
to the programming performed by your system operator when the
radio was set up, not to any programming that you can perform. If a
feature is not controlled by a front panel option switch, it is fixed in
the mode set by programming or not available. If you require addi­tional informat ion on the oper ati on of a fea tur e, con tac t your system
operator.

Speaking Into Microphone

For best results, hold the microphone about 1-2 inches from
your mouth and speak at a n ormal co nversa tional l evel. Do no t shout
since it distorts your voice and does not increase range. Make sure
that the PTT (push-to-talk) switch is pressed before you begin to

53

MISCELLANEOUS

speak and released as soon as the message is complete. If the
proceed tone is used, wa it for that ton e to sound befor e speaking (s ee
description on page 25).

Operation At Extended Range

When approaching the limits of radio range, the other party
may not be able to hear your transmissions and there may be an
increase in background noise when messages are received. You may
still be out of ra nge even t hough you can hear a message . The r eason
for this is that the signal you are receiving is usually tr ansmitted at a
higher power level than the one transmitted by your transceiver.
Communication may be improved by moving to higher ground or
away from shielding objects such as tall buildings or hills.

Preventing Battery Discharge

In the standby mode (power on, not transmitting), transceiver
power consumption is relatively low. Therefore, you can probably
leave the transceiver on for one or two days without operating the
vehicle and the battery should not become seriously discharged.
However, if the outdoor temperature is low enough to significantly
decrease battery capacity, the transceiver should be turned off when
not in use.

Since power consu mpti on i s s ig nificantly higher when transmit­ting, it is good practice to have the vehicle running while transmit­ting. This ensures that optimum power is being delivered to the
transceiver and that the battery does not become discharged.

Licensing

A government license is usually required to operate this trans­ceiver on the air. Your system operator will normally handle the
licensing requirements.

54

MISCELLANEOUS

Transceiver Service

If your transceiver is not operating properly, “OUT-LOCK”,
“PROG ERR”, “SLEEPING”, or “CALL SVC” may be displayed . It
may be possible to clear either of t he first two conditions b y turning
off and then on again to reset the control logic. Also make sure that
the controls are properly set and that the power, external speaker (if
used), and accessory (if used), cables are securely plugged into the
back of the transceiver. If the transceiver still does not operate prop­erly, return it to your system operator for service.

The “SLEEPING” message indicates the transceiver is tempo­rarily disabled as described on page 51, and when the CALL SVC
message is displayed, the transceiver must always be returned to
your system operator for service.

Another indication that could be displayed is “NO POWER”.
This indicates that transmitter temperature or supply voltage is
excessive. Release the PTT switch and allow the transceiver to cool,
and make sure that the vehicle battery voltage is within the normal
range.

NOTE: Ther e are no user-serviceabl e co mponent s in t he tra nscei ver.
Altering internal adjustments can cause illegal emissions, void the
warranty, and result in improper operation that can
seriously damage the transceiver.

55

MISCELLANEOUS

56

Part No. 002-9803-601
11-99hph Printed in U.S.A.