EFJohnson 002-9800-401 User Manual

MULTI-NET® 98xx SERIES

OPERATING MANUAL

Part No. 002-9800-401 April 2001

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 Health
Act and Federal Communication 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 (approximately 3 feet) 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 equipment not ex­pressly approved by the E.F.Johnson Company could void the user’s
authority to operate this equipment (FCC rules, 47CFR Part 15.19).

2

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

Copyright© 2001 by the E.F. Johnson Company

The E.F. Johnson Company, which was founded in 1923, provides wire­less communication systems solutions for public safety, government, and
commercial customers. The company designs, manufactures, and markets
conventional and trunked radio systems, mobile and portable subscriber
radios, repeaters, and Project 25 digital radio products.

Viking Head/EFJohnson logo, Multi-Net

®

, LTR®, and Call Guard® are
registered 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

FCC EXPOSURE LIMITS

This mobile radio transceiver was tested by the manufacturer with
an appropriate antenna in order to verify compliance with 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 Table 1 (B) titled “Limits For General Population/Uncontrolled
Exposure” which is from FCC report OET bulletin #65.

Table 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/cm2

2

)* 6

2

)

Time |E|

Ave ragin g

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 density

Electric Field

Strength (E)

(V/m)

Magnetic Field

Strength (H)

(A/m)

Power Density

(S)

(mW/cm2

2

)

2

)* 30

Ave ragin g

Time |E|

S (minutes)

2,

2,

|H|2,

|H|2,

4

SAFETY INFORMATION

Table 2 lists the antenna whips and bases recommended for use in
each frequency range. Each model of this radio was tested with the appro­priate antenna listed. The antenna was mounted in the center of the roof
of a domestically 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 Table 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
Table 1 and take measures to comply with those guidelines.

Table 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

5

TABLE OF CONTENTS

TABLE OF CONTENTS

SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

QUICK REFERENCE GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

CONTROLS AND DISPLAY. . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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

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

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

GENERAL OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

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

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

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

System/Group Display Information . . . . . . . . . . . . . . . . . . . . . 16

Numeric Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Alpha Tag Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

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

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

STANDARD CALLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Placing a Standard Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Receiving a Standard Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

TELEPHONE CALLS AND OTHER SPECIAL CALLS. . . . 21

Placing Telephone Calls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Receiving a Telephone Call . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Placing Other Multi-Net Special Calls . . . . . . . . . . . . . . . . . . . 23

Receiving Other Multi-Net Special Calls . . . . . . . . . . . . . . . . . 24

Landside-Originate Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

GENERAL FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Bank Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Call Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Emergency Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Function (FCN) Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Home System/Group Select . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Horn Alert. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Option Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Power Turn-Off Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Proceed (Clear-To-Talk) Tone . . . . . . . . . . . . . . . . . . . . . . . . . 30

6

TABLE OF CONTENTS

Stealth Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Tone Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Transmitter Thermal Foldback. . . . . . . . . . . . . . . . . . . . . . . . . 32

OPTION SWITCHES AND MENU MODE . . . . . . . . . . . . . . . 32

Option Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

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

Using Menu Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

SYSTEM AND GROUP SCAN. . . . . . . . . . . . . . . . . . . . . . . . . 35

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Single and Multiple Site Scan . . . . . . . . . . . . . . . . . . . . . . . . . 37

Scan List Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Scan Delay and Continue Timers. . . . . . . . . . . . . . . . . . . . . . . 38

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

MULTI-NET, LTR, AND CONVENTIONAL MODES . . . . . . 40

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Multi-Net and LTR Operation . . . . . . . . . . . . . . . . . . . . . . . . . 40

Conventional Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Monitoring Conventional Channels Before Transmitting . . . . 42

MULTI-NET FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Standard and Special Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Busy Queuing (Multi-Net) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Roaming (Auto-Registration). . . . . . . . . . . . . . . . . . . . . . . . . . 44

Transmitting Status Messages . . . . . . . . . . . . . . . . . . . . . . . . . 45

Caller Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Calls on Priority and Block ID Codes . . . . . . . . . . . . . . . . . . . 46

Transmit Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

LTR FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Standard and Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . . . 48

Busy Queuing (LTR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

System Search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Transpond . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Priority and Block ID Codes . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Transmit Inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

CONVENTIONAL FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . 50

Monitor Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Transmit Disable On Busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Receive-Only Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

7

TABLE OF CONTENTS

Talk-Around . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Call Guard Squelch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Priority Group Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

MISCELLANEOUS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Supervisory Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Multi-Net Telephone Call Tones . . . . . . . . . . . . . . . . . . . . . . . 56

LTR Telephone Call Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Display Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Menu Mode Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

System Operator Programming . . . . . . . . . . . . . . . . . . . . . . . . 61

Speaking Into Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Operation At Extended Range . . . . . . . . . . . . . . . . . . . . . . . . . 61

Preventing Battery Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . 62

Licensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Transceiver Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

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

Phone/

Horn

Alert

UID

Encryption

Scan

Selected

Monitor

Option

Group Scan

List

Priority

Call

Group

Power On/Off - Press on-off /volume control.

Set Volume Level - Rotate on-off/volume control.

Change System or Group - Press Select switch to enable system or group

select mode (indicated by

←/→ or __). Then rotate Select switch to

select desired system or group (see page 17).

Select Menu Mode - Press FCN twice then rotate/press Select switch as

required to display/select desired parameter (see page 32).

Select Home System/Group - Press FCN then the Select switch.

Scan On/Off - Press SCAN switch. Scan on = , Scanning occurring =

scrolling underline (see page 35).

Program System or Group Scan List - Press Select switch to enable

system or group programming mode (same as when changing system

or group), then press A/D switch. System in list = , Group in list =

(see page 37).

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

with conventional system selected (see page 18).

Monitor Before 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 42).

9

FEATURES

General Features

• Up to approximately 100 1-group or 40 16-group systems programmable

• Multi-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 various functions

• Five programmable option switches

• Up to 16 banks selectable

• Proceed (clear-to-talk) tone

• Call indicator

• Time-out timer

• Horn alert

• Emergency switch

• Companding and Encryption (optional)

Multi-Net Features

• Busy queuing (all calls)

• Roaming (auto-registration)

• Special calls such as unique ID and directed group

• Status messaging (1 of up to 8 messages can be sent)

• Transmit inhibit

• Receive priority calls

LTR Features

• Busy queuing (telephone calls only)

• System search (telephone calls only)

• Transpond

• Transmit inhibit

• Receive priority calls

Conventional Features

• Busy indicator

• Talk-a round

• User-adjustable squelch level

• Call Guard® squelch control

• First and second priority channel sampling

• Monitor mode and Transmit disable on busy

• Receive-only groups

NOTE: Dealer 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 Volume - 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 30. Rotating this knob sets the speaker volume (see
page 15).

Select Switch - This switch changes the selected system or group and is
also used for other functions such as selecting parameters in the menu
mode.

To change the system or group, 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 for more information.

This switch also has two alternate functions that are selected by first
pressing the FCN switch. Refer to the FCN switch description which
follows for more information.

11

CONTROLS AND DISPLAY

Option Switches - The five front panel option switches can be
programmed by your system operator to the functions listed below. Refer
to the section indicated for more information on a function. The keycap
usually indicates the function controlled by the switch.

A/D - Scan list add/delete (see page 37)

CG - Call Guard squelch disable (see page 52)

EMER - Emergency switch (see page 26)

ENCPT - Encryption on-off (see page 27)

FCN - Function select (see following description)

HORN - Horn alert on-off (see page 28)

MON - Monitor mode on-off (see page 42)

AUX - Option select (see page 29)

PRI - Priority sampling on-off (see page 53)

SCAN - Scan on-off (see page 35)

STLH (AUX) - Stealth mode select (see page 31)

TA - Talk-around on-off (see page 52)

(Blank) - Not used (disabled)

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 32)

- FCN/press Select switch (see page 28)

- FCN/rotate Select switch (see page 18)

Transmit/Busy Indicator - Indicates the following conditions:

Red

- Transmitter keyed, normal power output

Orange

- Transmitter keyed, power reduced because internal
temperature is high

Green

- Busy conventional group (channel). Refer to “Conventional
Operation” on page 41 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.

12

CONTROLS AND DISPLAY

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

Antenna

Jack

Power

Jack

Speaker

Jack

Rear Panel Jacks and Connectors

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

Power Jack - Connection point for the power cable which attaches 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 automatically disabled 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 and horn alert to the transceiver.

Data Cable (Not Shown) - This optional cable is used to connect data
equipment such as modems and data terminals to the transceiver.

13

CONTROLS AND DISPLAY

System Scan

List

Encryption

Phone/

UID

Horn

Alert

Scan

Selected

16-Character

Message Area

Call

Priority
Groups

Option

Group Scan

List

Monitor

Display Description

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 37).

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

normally (see page 37).

- Indicates that the selected group is programmed for telephone
calls. With Multi-Net operation, it also indicates that the group is
programmed for unique ID or directed group calls (see page 21).

- Indicates that optional encryption is enabled (see page 27).

- Indicates that the horn alert is enabled (see page 28).

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

14

GENERAL OPERATION

- Indicates that an option controlled by the AUX switch is enabled

(see page 26).

- Indicates that a call has been received on a group programmed for a

call indicator (see page 26). To turn this indication off, press any key.

- Indicates that the monitor mode is enabled. This mode disables Call
Guard squelch and other squelch control features so that all messages are
heard on conventional systems (see page 50).

- When only is displayed, the selected or displayed group is
scanned as a first priority group. When is displayed, it is scanned as a
second priority group (see page 53).

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 ready to be used.

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 enabled, a short tone sounds when an option

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

15

GENERAL OPERATION

• If a conventional system 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 counterclockwise 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 a
Multi-Net or LTR system is selected.

Backlight Operation

The display and keypad backlight can be controlled by the BACK­LIGHT menu parameter (see page 40). 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 Information

The selected system and group are displayed using either a Numeric
or Alpha Tag 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
numbers are displayed on the top line as Sxx and Gxx, and the group
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.

Alpha Tag Mode - In the alpha tag mode, the system alpha tag is
displayed on the top line and the group alpha tag is displayed on the

16

- In the numeric mode, the selected system and group

System Number

Group Number

Group Alpha Tag

Numeric Display Mode

GENERAL OPERATION

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.

System Alpha Tag

Group Alpha Tag

Alpha Tag Display Mode

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 then rotating it increases or decreases the system or group.

In the Numeric display mode (see preceding description), the system
select mode is indicated when the arrow points to “Sxx”, and the group
select mode is indicated when it points to “Gxx” (see following diagram).

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
tag. Likewise, the group select mode is indicated by an underline in the
left-most position of the group alpha tag (see following diagram).

17

GENERAL OPERATION

System Select

Mode

Group Select

Mode

Select Mode Indication With Alpha Tag Display

The transceiver can be programmed so that after a change is made,
the current select mode remains enabled or a default mode is selected
after a delay of up to 15 seconds. This programming also controls the
mode that is selected when power is turned on.

Setting Squelch Control

NOTE: This sets the squelch level used for conventional calls. The
squelch level for Multi-Net and LTR calls is preset and not affected by
this adjustment. For more information on the various operating modes,
refer to page 40.

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

1. Select a conventional system and then a group that is not busy. Take 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.

18

STANDARD CALLS

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

ment on both types because separate settings are maintained.

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

STANDARD CALLS

Introduction

Most calls you make are probably the standard 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 type that
can be placed (special calls) is that no number is dialed using a keypad.
The following procedure applies to all three types of operation (Multi­Net, LTR, and conventional).

Placing a Standard Call

1. Turn transceiver power on and set the volume as described starting on

page 15. With conventional operation, also set the squelch as described
on page 18.

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

“Selecting the System and Group” on page 17.

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

automatically as described on page 42.

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

release it to listen. Operation with Multi-Net, LTR, and conventional
systems is as follows:

Multi-Net and LTR Operation

• If the proceed tone is enabled (see page 30), it sounds shortly after

the PTT switch is pressed to indicate that the radio system was

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