Ericsson LBI-38732D User Manual

LBI-38732D

Operator’s Manual

EDACS® M-RK-II PORTABLE RADIO

ericssonz

NOTICE!

This manual co v ers Ericsson and Gener al Electric products

manufactured and sold by Ericsson Inc.

NOTE!

Repairs to this equipment should be made only by an authorized service technician or facility designated by the supplier. Any repairs, alterations or substitution of recommended parts made by the user to this equipment not approved by the manufacturer could void the user’s authority to operate the equipment in addition to the manufa cture r’s warranty.

NOTICE

The software contained in this device is copyrighted by Ericsson Inc. Unpublished rights are reserved under the copyright laws of the United States.

This manual is published by without any warranty. Improvements and changes to this manual necessitated by typographical errors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by

munications Inc

incorportated into new editions of this manual. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose, without the express written permission of

., at any time and without notice. Such changes will be

Ericsson GE Mobile Communications Inc.,

Ericsson GE Mobile Com-

Ericsson GE Mobile Communications Inc.

TABLE OF CONTENTS

SAFETY INFORMATION . . . . . . . . . . . . . . 7

BATTERY CHARGING AND CARE . . . . . . . . 8

FOR BEST PERFORMANCE . . . . . . . . . 10

EXTENDED OPERATIONS . . . . . . . . . . . . 11

FCC LICENSING . . . . . . . . . . . . . . . . . . 12

TRANSCEIVER SERVICE . . . . . . . . . . . . . 12

INTRODUCTION . . . . . . . . . . . . . . . . . . 13

USER INTERFACE . . . . . . . . . . . . . . . . . 14

BUTTONS AND KNOBS . . . . . . . . . . . . 17

KEYPAD . . . . . . . . . . . . . . . . . . . . 19

DISPLAY . . . . . . . . . . . . . . . . . . . . 22

Messages . . . . . . . . . . . . . . . . . . 23

Status Indicators . . . . . . . . . . . . . . . 28

UNIVERSAL DEVICE CONNECTOR (UDC) . 30

ALERT TONES . . . . . . . . . . . . . . . . . 31

Call Originate . . . . . . . . . . . . . . . . . 31

Autokey (Trunked Mode Only) . . . . . . . . 31

Call Queued (Trunked Mode Only) . . . . . . 31

System Busy (Trunked Mode Only) . . . . . 32

Call Denied (Trunked Mode Only) . . . . . . 32

Carrier Control Timer . . . . . . . . . . . . . 32

Low Battery Warning . . . . . . . . . . . . . 32

Low Battery Alert (Transmit Lockout) . . . . 33

Key Press Alert . . . . . . . . . . . . . . . . 33

OPERATION . . . . . . . . . . . . . . . . . . . . 33

KEYPAD LOCK/UNLOCK . . . . . . . . . . . 33

TURNING ON THE RADIO . . . . . . . . . . . 34

SELECTION MODE RULES . . . . . . . . . . 34

. . . . . . . . . . . . . . . . . . . . . .

SYSTEM/GROUP/CHANNEL SELECTION . . 41

System Selection . . . . . . . . . . . . . . . 41

Group And Channel Selec ti on . . . . . . . . 43

EMERGENCY/HOME BUTTON DEFINITION . 44

Home . . . . . . . . . . . . . . . . . . . . . 44

AEGIS AND VOICE GUARD OPERATION . . . 45

V oice Modes . . . . . . . . . . . . . . . . . 45

Clear Modes . . . . . . . . . . . . . . . . . 46

Aegis Digital Mode . . . . . . . . . . . . . 46

DTMF . . . . . . . . . . . . . . . . . . . . 47

Error Messages . . . . . . . . . . . . . . . 48

AEGIS PRIVATE AND VOICE GUARD

PRIVATE MODES . . . . . . . . . . . . . . . . 48

Transferring Ke y s In to T he Ra di o . . . . . . 49

Displaying The Currently Used Cryptographic

Key Number . . . . . . . . . . . . . . . . . 50

Key Zero . . . . . . . . . . . . . . . . . . . 51

PRIVATE OPERATION . . . . . . . . . . . . . . 52

Receiving An Encrypted Call . . . . . . . . 52

Transmitting An Encrypted Call . . . . . . . 52

Scanned Group Calls . . . . . . . . . . . . 53

LAST SYSTEM/GROUP OR CHANNEL RECALL

(SUPERVISORY RADIO UNITS ONLY) . . . . . 54

EDACS TRUNKED MODE OPERATION . . . . . 55

RECEIVING A CALL . . . . . . . . . . . . . . . 55

SENDING A CALL . . . . . . . . . . . . . . . . 56

CONVENTIONAL FAILSOFT . . . . . . . . . . 57

SCAT OPERA TION . . . . . . . . . . . . . . . . 58

EMERGENCY OPERATION . . . . . . . . . . . 58

Receiving An Emergency Call . . . . . . . 59

Declaring An Emergency Call . . . . . . . . 59

SCANNING TRUNKED SYSTEMS . . . . . . . 60

Wide Area System Scan . . . . . . . . . . 60

ProSound . . . . . . . . . . . . . . . . . 60

Priority System Scan . . . . . . . . . . . . 61

SCANNING TRUNKED GROUPS . . . . . . . . 61

Adding Groups To A Scan List . . . . . . . 61

Deleting Groups From A Scan List . . . . . 62

Nuisance Delete . . . . . . . . . . . . . . . 62

Turning Scan On . . . . . . . . . . . . . . 62

Turning Scan Off . . . . . . . . . . . . . . 63

PROGRAMMABLE ENTRIES . . . . . . . . . . . 64

INDIVIDUAL CALLS . . . . . . . . . . . . . . . 65

Receiving And Responding To An Individual

Call (Trunked Mode Only) . . . . . . . . . . 65

Call Storage Lists . . . . . . . . . . . . . . 67

Sending An Individual Call

(Trunked Mode Only) . . . . . . . . . . . . . 68

TELEPHONE INTERCONNECT CALLS . . . . 69

Receiving A Telephone Interconnect Call

(Trunked Mode Only) . . . . . . . . . . . . . 69

Sending A Telephone Interconnect Call

(Trunked Mode Only) . . . . . . . . . . . . . 69

DTMF Overdi al /C o nventiona l Mo de

Telephone Interconnect . . . . . . . . . . . 70

PORTABLE DATA . . . . . . . . . . . . . . . . 72

Data Displays . . . . . . . . . . . . . . . . 73

Data Off Operation . . . . . . . . . . . . . . 74

Data On Operation . . . . . . . . . . . . . . 74

Exiting Data Calls . . . . . . . . . . . . . . 75

Scan Lockout Mode . . . . . . . . . . . . . 75

Data Lockout Mode . . . . . . . . . . . . . 76

ProFile Select Option . . . . . . . . . . . . 76

Menu Option . . . . . . . . . . . . . . . 76

Option Availability . . . . . . . . . . . . 77

STA T US/M ESSAGE OPERATION . . . . . . . 78

Status Operation . . . . . . . . . . . . . . . 78

Message Operation . . . . . . . . . . . . . 79

EDACS CONVENTIONAL P1 SCAN . . . . . . 80

D YNAMIC REGROUP OPERA TION . . . . . . 80

Emergency Operati on . . . . . . . . . . . . 81

MACRO KEY OPERATION . . . . . . . . . . . 81

CONVENTIONAL MODE OPERATION . . . . . . 83

SQUELCH ADJUST

(256K & UP VERSION RADIOS ONLY) . . . . 83

Menu Selection . . . . . . . . . . . . . . . . 84

Pre-Programmed Keypad Key . . . . . . . . 85

RECEIVING A CALL . . . . . . . . . . . . . . 85

SENDING A CALL . . . . . . . . . . . . . . . 86

EMERGENCY OPERATION . . . . . . . . . . 86

Using 5-Tone Signalling For Emergency

Declaration . . . . . . . . . . . . . . . . . . 88

TONE ENCODE TRANSMISSION . . . . . . . 88

SCANNING CONVENTIONAL CHANNELS . . . 89

ADDING CHANNELS TO A SCAN LIST . . . . . 90

DELETING CHANNELS FROM A SCAN LIST . 91

NUISANCE DELETE . . . . . . . . . . . . . . . 91

TURNING SCAN ON . . . . . . . . . . . . . . . 91

TURNING SCAN OFF . . . . . . . . . . . . . . 92

TYPE 99 DECODE (CONVENTIONAL ONLY) . . 92 OPERAT ING RULES AND REGULATIONS . . . 95

OPERATING TIPS . . . . . . . . . . . . . . . . . 96

INTRINSICALLY SAFE USAGE . . . . . . . . . . 97

BATTERY PACKS . . . . . . . . . . . . . . . . . 97

ACCESSORIES . . . . . . . . . . . . . . . . . . 98

GLOSSAR Y . . . . . . . . . . . . . . . . . . . . 99

OPERATOR’S RADIO SETUP . . . . . . . . . . 102

WARRANT Y . . . . . . . . . . . . . . . . . . . . 106

NICKEL-CADMIUM BATTERY WARRANTY . . . 107

SAFETY INFORMATION

The Federal Communications Commission (FCC), with its action in General Docket 79-144, March 13, 1985, has adopted a safety standard for the human exposure to radio frequency (RF) electromagnetic energy emitted by FCC regulated equipment. Pr oper operation of this radio will result in user exposure far below the Occupational Safety and Health Act and Federal Communication Commission limits.

DO NOT

antenna is close to, or touching, exposed parts of the body -- especially the eyes or face --while the radio is transmitting.

DO NOT

blasting caps or in an explosive atmosphere, unless it is a type specifically designed and qualified for such use.

DO NOT

nector is secure and any open connectors are properly terminated.

DO NOT

equipped radio equipment.

This device complies with Part 15 of the FCC rules. Operation is subject to the condition that this device does not cause harmful interference.

hold the radio in such a manner that the

operate the radio near unshielded electrical

operate the radio unless the antenna con-

allow children to operate transmitter-

BATTERY CHARGING AND CARE

Do not dispose of the battery pack in fire - it may

explode, causing injury or death.

Do not replace the battery in hazardous atmosphere

locations.

Do not carry battery loose in your pocket or purse. Do not attempt to repair battery.

The product you have purchased contains a rechargeable battery. The battery is recyclable. At the end of its useful life under various state and local laws it may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste officials for details concerning recycling op-

tions or proper disposal in your area. Call Toll Free 1-800-8- BA TTER Y for information and/or procedures for returning rechargeable batteries in your state.

Your radio comes supplied with a Ni-Cd battery pack which can be recharged from 500 to 1000 times before requiring replacement. The actual number of charge/recharge cycles vary depending upon usage. We recommend that the battery be charged 14 to 16 hours on the first charge cycle and then in accordance with the charger model instructions thereafter.

To remove the battery pack, push up on the battery latch and slide the battery pack to the right. To replace the battery , align the battery on the track and slide to the left until a click is heard, indicating the battery is correctly installed.

Figure 1 - Installing And Removing The Battery Pack

If the battery is to be charged on the radio, turn the power switch on the radio to the off position before charging. F ailing to turn the power s witch to off during the charge cycle will result in a less than full charge condition, which will noticeably reduce the operating time between charges!

Normal battery operation time is 8 hours. This may vary depending upon how much the receiver audio is present and how much you transmit. The actual time may vary from day to day depending upon operational requirements.

FOR BEST PERFORMANCE

1. Charge battery to full capacity , 14 hours at the standard C/10 rate (capacity X .10). For "rapid" chargers, allow additional time (2-3 hours) for "topping off" the charge after it switches from "fast" to "slow".

2. Use the battery soon and use as much of the battery capacity as possible or practical. A battery that is charged and discharged completely will maintain the longest running time capacity. Also, several charge/discharge cycles are recommended to bring a new battery up to its rated capacity.

3. Store and charge the batteries at room temperature 65°F to 75°F. Batteries that have been stored f or over a month should be recharged before putting into service due to chemical self-discharge which occurs at a rate of approximately 1% per da y. Do not charge cold batteries (40°F or below).

4. Reduced capacity or "memory effect" may result from repeated identical shallow discharge/full recharge cycles. If such a condition is suspected, run the battery until the instrumentation loses all power, then fully recharge and discharge again. Repeat this cycle 3-4 times.

EXTENDED OPERATIONS

When operating in "Fringe Areas" at some distance from the System, the other par ty may not receive your transmission clearly . Also, you may notice that the background noise will increase on received signals. Moving to higher ground or moving closer to the System will help alleviate these problems. If moving closer to the System is not practical, communication may be improved by moving away from shielding structures. If you are in a building interior, mo ve closer to a window (preferab ly one generally in the direction of the System). At 800 MHz the wave length is very short, sometimes moving a few inches to a few feet can mak e significant signal strength changes. Finding the best location can also be done while listening to the background noise while moving about; attempt to find a spot where the background noise is reduced to a minimum or eliminated entirely. This may make the difference from not being heard, to being heard loud and clear when operating in the fringe areas of your System coverage.

The fringe distance will vary greatly from plains areas , hilly terrain and mountain top sites.

FCC LICENSING

This unit may or may not require a specific FCC license to operate. The FCC requires all tr ansmitters in the conventional and some Trunked Systems to be licensed by the F ederal Communications Commission. Some Tr unked operations a re now exempt from in dividual licen sin g r e qu ir e me nt s but must be op erat ed in a licensed System.

Consult your dealer regarding specific licensing information, or contact the Federal Communications Commission.

For more information regarding the FCC license application (Form 571), call 717-337-1212, or contact the FCC District Office nearest your location.

TRANSCEIVER SERVICE

There are no user serviceable components inside the radio. Altering the inter nal components or adjustments may result in illegal emissions, including off-frequency operation, or damage to the radio.

Should an display , or the LCD f ails to display information, or all icons and display segments are shown, turn the POWER ON-OFF/VOLUME control OFF then ON to reset the microprocessor. Ensure that the battery is fully charged and check that the antenna is securely tightened.

If the unit still fails to operate properly, refer to an Authorized Service Center for servicing.

UNLOCK

condition be shown in the LCD

INTRODUCTION

This manual describes how to use the EDA CS M-RK II Portable Radio. The M-RK II is a synthesized, micr oprocessor-based, high performance portable FM radio providing reliable two-way communications in both the Enhanced Digital Access Communications System (EDACS) trunking environment and conventional communication systems.

In the EDACS or trunked system mode, the user selects a communications system and group. In this mode, channel selection is transparent to the user and is controlled via digital communication with the system controller. This provides advanced programmable features and fast access to communication channels.

In the conventional mode, the user selects a channel and directly communicates on that channel. In this mode, a system refers to a set of channels. A channel is a transmit/receive radio frequency pair.

The exact operation of the radio will depend on the operating mode, the radio’s programming, and the particular radio system. Most features described in this manual may be enabled or disabled through programming. Consult the system administrator f or the particular features that are programmed into the M-RK II.

USER INTERFACE

The M-RK II operating controls are located on the radio’s front, top and left panels. A 15-button keypad, liquid crystal display (LCD) for radio status information, microphone and speaker are on the front panel. The top panel houses a rotary SYSTEM/GROUP/CHANNEL knob, POWER ON-OFF/VOLUME control knob and a protected red EMERGENCY button. An OPTION button, CLEAR/MONITOR button and the Push-To-Talk (PTT) button are all located on the left side panel. The Universal Device Connector (UDC) is located on the right panel and is used while programming the radio and for accessory connection.

The keypad is used for manual number entry for individual calls, access to a telephone interconnect system, and activation of various EDACS or conventional features such as menu selection or scan operations.

The display has two, eight-alphanumeric-character lines used to show the operational mode of the radio. Fifteen status indicators, used to indicate various operating conditions such as transmitter on, channel busy, scanning, or low battery, are located above and to the right side of the character lines within the display. A back light illuminates the display and the k eypad for nighttime use.

Figure 2 - M-RK II Portable Radio

Figure 3 - Top And Partial Left Panel Views

BUTTONS AND KNOBS

This section describes the primary function of the button and knob controls. Other functions associated with these controls are detailed in later sections.

SYSTEM

/GROUP

/CHANNEL

KNOB

PO WER

ON-OFF

/VOLUME

KNOB

Selects systems or groups/channels (depending on programming). T his is a 16 - position rotary knob. See SYSTEM/GROUP/CHANNEL SELECTION for details.

Applies power to the radio and adjusts the receiver’s volume. Rotating the control clockwise out of detent applies power to the radio. A single alert tone sounds (if enabled through programming) to indicate the radio is operational.

Rotating the control clockwise increases the volume level. Minimum volume levels may be programmed into the radio to prevent missed calls due to a low volume setting. While adjusting the volume the display will momentarily indicate the volume level (i.e. range is from a minimum programmed level of zero (displa yed as

OFF

the loudest level.

VOL = 31

in the display) up to 31 which is

). The volume

EMERGEN-

CY/HOME-

BUTTON

The EMERGENCY/HOME button is used to automatically select a desired Group and/or System by pressing and holding the button for a preprogrammed duration. The EMERGENCY/HOME button is also used to declare emergencies by pressing and holding the button for a pre-programmed duration. Emergency messages may only be issued on EDA CS system s.

OPTION

BUTTON

/MONITOR

BUTTON

CLEAR

(1) Programmable per system. (2) Perf orms the backspace function during data entry. In Phone and Individual Call modes the OPTION button can be used to recall the last phone number or radio ID entered.

Serves several purposes depending on the operating mode. In trunked mode, the CLEAR/MONITOR b utton exits the current operation and removes all displays associated with it. The radio and display then return to the group receive state. In conventional mode, pressing this button unmutes the receiver so activity on the selected channel can be monitored. When pressed and held for approximately 3 seconds, this button toggles conventional channel decoding/encoding (Channel Guard, Digital Channel Guard, T99) on and off if

programmed for the selected channel.

PUSH-TO-

TALK BUT-

TON (PTT) KEYP AD

The keypad layout is similar to a standard telephone keypad but with three additional buttons at the top for a total of 15 keys. In addition to numbers, most of the keys have special functions and are labeled as such using a symbol or abbreviated word describing its primary function. Numeric entry is a secondary function of the keys. Each key is described below.

Enables the radio’s transmitter. Releasing PTT returns the radio to the receive mode.

Figure 4 - M-RK II Keypad

, .

Primary function - changes the s ys tem or group/channel (depending on programming); secondary function changes to a selection for items

within a list. Press increasing order, decreasing order. To auto-ramp

press and hold either key .

to scroll in

Primary function - accesses the menu list. This is a list of additional features that are not available directly from the keypad. See MENU for details. Secondary function - activates a selected item within a list. After the menus list is accessed, select a menu item from the list via

and activate it with this

key. Once activated, ues its secondary function for activating a selected parameter setting until the radio returns to its nor mal receive state. This is similar to an enter key.

Used to directly access systems via the keypad and to access system selection in increasing or decreasing order, or to select a set (bank) of systems for SYSTEM/GROUP/CHANNEL knob selection (depending on programming). See SYSTEM/ GROUP/CHANNEL SELECTION for details.

contin-

Used to directly access groups via the keypad and to access group selection in increasing or decreasing

order, or to select a set (bank) of groups for SYSTEM/GROUP/ CHANNEL knob selection (depending on programming). See SYSTEM/ GROUP/CHANNEL SELECTION for details.

6 9

Toggles scan operation on and off. When the radio is scanning, is on and all groups or channels in the scan list of the currently selected system are scanned.

Adds or deletes selected groups or channels from the scan list of the currently selected system. See the trunked and conventional scan sections for details.

The Status key is used to send a preprogrammed status message to the EDA CS site .

The Message key is used to send a pre-programmed status message to the ED ACS si te.

Used to place a telephone call through the radio by selecting the telephone interconnect special call function. See Telephone Interconnect Calls for details.

SCN

Used to call an individual or make an all-call by selecting the individual call

special call function. See Individual Calls for details.

DISPLA Y

The radio’ s display is shown below . The two character lines are used to display system, group and channel names and also operational messages to the user. Each line contains eight alphanumeric character blocks. The 15 status indicators are used to show the various operating conditions of the radio. If the display back-lighting is programmed on, the display will illuminate for a short period when any of the controls are operated.

Line 1 Line 2

The two display lines can be inverted to permit easy viewing if the radio is worn on a belt or placed into a

vehicular charger. Press acter lines, press

display. Refer to the MENU section to change the display’s contrast.

Inverts the display’s two alphanumeric character lines for viewing from above; useful when the radio is attached to the user’s belt.

Figure 5 - M-RK II Display

once to invert the char-

again to return to the normal

Messages

During radio operation, various messages are displayed on either line one or line two. Typical messages include control channel status information, such as system busy or call denied, or messages associated with the radio’s operation, (i.e. volume or contrast adjust). These messages are described below.

Message Name Description

QUEUED Call Queued

SYS BUSY System Busy

DENIED Call Denied

Trunked mode only. Indicates the system has placed the call in a request queue.

Trunked mode only. Indicates the system is busy, no channels are currently available, the queue is full or an individual call is being attempted to a radio that is currently transmitting.

Trunked mode only. Indicates the radio is not authorized to operate on the selected system.

CC SCAN Control Channel Scan

Trunked mode only. Indicates the control channel is lost and the radio has entered the Control Channel Scan mode to search for the control channel.

WA SCAN Wide Area Scan

TALKARND Talk-around

*RXEMER* Receive Emergency

Trunked mode only. Indicates the control channel is lost and radio has entered the Wide Area Scan mode to search for a new system (if enabled through programming).

Conventional mode only. Indicates the radio is operating on conventional channels in talkaround mode (no repeater).

Trunked mode only . Indicates an emergency call

is being received. This message will be flashing on line two.

*TXEMER* Transmit Emergency

VOL = 31 Volume Level

LOW BATT Battery Low

Trunked mode only . Indicates an emergency call has been transmitted. This message will be flashing on line two.

Indicates the current volume lev el. The volume level display ranges from OFF (silent) to 31 (loudest).

Indicates the battery level is too low for transmission. This message displays when pressing PTT and transmitting is disabled due to the low battery condition.

UNKNOWN Unknown ID

Trunked mode only . Indicates an

individual call is being received by an unknown radio ID. This bypasses when the call is updated.

TX DATA Transmit Data

RX DATA Receive Data

DATA OFF Data Off

DATA ON Data On

Trunked mode only. Indicates when a data call is being transmitted. Displayed on line one.

Trunked mode only. Indicates when a data call is being received. Displayed on line one.

Trunked mode only. Indicates when radio is in data disable state. Displayed on line one.

Trunked mode only. Indicates when radio is toggled to data enable state. Displayed on line

one for two seconds.

KEY ZERO Key Zero

PVT DIS Private Disabled

FRCD PVT Forced Private

NO KEY # No Key Number

Indicates that cryptographic keys have been erased from radio memory .

Indicates that the group or channel is not programmed for private mode operation.

Indicates that group or channel is pre-programmed for private mode operation and clear mode is not possible.

Indicates that the correct cryptographic key is not loaded for the selected group or channel.

Status Indicators

The 15 status indicators show the various operating characteristics of the radio. The indicators show operating modes and conditions as follows:

SVC Trunked mode only .

ON - indicates the radio is in an EDACS service area and is in communication with the site controller via the control channel (CC). FLASHING - indicates the EDACS is in the failsoft mode (if enabled through programming). OFF - indicates the radio is out of range or the control channel is not available.

CG Conventional mode only.

ON - indicates Channel Guard encode/decode is enabled on the selected conventional channel.

BAT ON - indicates the battery pack’s charge is

low and needs recharging.

PVT Private

ON - indicates the group or channel is enabled to receive encrypted messages. FLASHING - indicates an encrypted transmission is being received.

BSY Channel Busy -

In trunked mode:

ON - indicates the radio is transmitting or receiving a call on the working channel. FLASHING - indicates a call has been queued.

In conventional mode:

ON - indicates a call is being receiv ed.

WHC Who Has Called (trunk ed mode only)

ON - indicates an individual call has been received, but not responded to . The indicator turns OFF if the individual call mode is entered, the system is changed or the radio is turned off and back on.

SPC ON - indicates the radio is in the special

call select/entry mode ( Individual or Telephone Interconnect).

HI ON - indicates the selected group or chan-

nel is selected to transmit at high power . OFF - indicates the selected group or channel is selected to transmit at low power.

XMIT ON - indicates the radio is transmitting.

When operating in a trunked system, the radio may be programmed to automatically transmit (without pressing PTT) to maintain digital communication with the

site controller. will turn on whenever the radio is transmitting.

XMIT

SCN ON - indicates the scan mode is enabled.

S ON - indicates the selected group or chan-

nel is in the scan list.

1 ON - (conventional mode only) indicates

the selected channel is designated as the priority-one scan channel.

2 ON - (conventional mode only) indicates

the selected channel is designated as the priority-two scan channel.

ON - (conventional mode only) indicates that the selected channel has T99 decode option enabled.

UNIVERSAL DEVICE CONNECTOR (UDC)

The Universal Device Connector (UDC) provides connections for external accessories such as a headset or a speaker-microphone. When the radio is locked in a vehicular charger/repeater, the UDC provides the audio and control connections between the radio and the vehicular charger/repeater. The UDC is also used to program and service the radio.

+ 78 hidden pages