E.F. Johnson LTR-Net 7243, LTR-Net 7200 Series Service Manual

TRUNKED PORTABLE RADIO

SERVICE

MANUAL

First Issue

November 2001

LTR-NET™7243 UHF PORTABLE

7.5VDC 1 and 4 Watts Part No. 242-7243-xxx

7243

LTR-NET

™

PORTABLE RADIO

SERVICE MANUAL

UHF, 430-470 MHz

Part No. 242-7243-633

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, LTR

, LTR-Net™, and Call Guard® are trademarks of the

E.F. Johnson Company. SMARTNET

™

and SmartZone® are trademarks of Motorola, Inc. All other company and/or product names used in this manual are trademarks and/or registered trademarks of their respective manufacturer.

Information in this manual is subject to change without notice.

TABLE OF CONTENTS

iii

November 2001

Part No. 001-7240-001

TABLE OF CONTENTS

1 GENERAL INFORMATION

1.1 SCOPE OF MANUAL. . . . . . . . . . . . . . . . . . . .1-1

1.2 TRANSCEIVER DESCRIPTION. . . . . . . . . . .1-1

1.3 PART NUMBER BREAKDOWN. . . . . . . . . . .1-1

1.4 TRANSCEIVER IDENTIFICATION . . . . . . . .1-1

1.5 TRANSCEIVER TUNING. . . . . . . . . . . . . . . . .1-1

1.6 ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.7 FACTORY CUSTOMER SERVICE . . . . . . . .1-2

1.8 FACTORY RETURNS . . . . . . . . . . . . . . . . . . .1-2

1.9 REPLACEMENT PARTS. . . . . . . . . . . . . . . . .1-3

1.10 INTERNET HOME PAGE. . . . . . . . . . . . . . . . .1-3

1.11 DISASSEMBLING TRANSCEIVER. . . . . . . .1-3

1.12 BATTERY CHARGER INFORMATION. . . . .1-4

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Fast Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Slow Charging . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

7243 SPECIFICATIONS. . . . . . . . . . . . . . . . . .1-5

2 OPERATION

2.1 FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

General Features. . . . . . . . . . . . . . . . . . . . . . . . . 2-1

LTR-Net Features. . . . . . . . . . . . . . . . . . . . . . . . 2-1

LTR Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Conventional Features . . . . . . . . . . . . . . . . . . . . 2-1

2.2 CONTROLS AND DISPLAY . . . . . . . . . . . . . .2-2

Top AND SIDE Controls . . . . . . . . . . . . . . . . . . 2-2

Side Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Front Panel Keys . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.3 BASIC OPERATION. . . . . . . . . . . . . . . . . . . . .2-5

Power-Up Sequence . . . . . . . . . . . . . . . . . . . . . . 2-5

Backlight Operation . . . . . . . . . . . . . . . . . . . . . . 2-5

Setting Volume Levels . . . . . . . . . . . . . . . . . . . . 2-5

System/Group Display Mode. . . . . . . . . . . . . . . 2-6

System and Group Select . . . . . . . . . . . . . . . . . . 2-6

Keypad Disable (Standard). . . . . . . . . . . . . . . . . 2-6

Keypad Disable (Using PASSWORD) . . . . . . . 2-6

Low Battery Indication. . . . . . . . . . . . . . . . . . . . 2-7

Option Switches . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Displaying Software Revision Number . . . . . . . 2-7

LTR-Net, LTR, and Conventional Operation. . . 2-7

Localities, Systems, and Groups . . . . . . . . . . . . 2-8

Placing and Receiving Standard Group Calls . . 2-9

Receiving a Standard Group Call. . . . . . . . . . . . 2-9

2.4 GENERAL FEATURES . . . . . . . . . . . . . . . . . .2-9

Bank Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Call Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Companding . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Emergency Switch . . . . . . . . . . . . . . . . . . . . . . 2-10

Encryption . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Home System/Group Select . . . . . . . . . . . . . . . 2-11

Option Select. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Power Select . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Proceed (Clear-To-Talk) Tone . . . . . . . . . . . . . 2-11

Receive-Only Groups . . . . . . . . . . . . . . . . . . . . 2-11

Time-Out Timer . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Tone Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.5 OPTION SWITCHES AND MENU MODE . .2-12

Option Switches . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Menu Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.6 SYSTEM AND GROUP SCANNING . . . . . .2-13

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Scan On-Off . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Scan Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

LTR-Net Mode Scanning . . . . . . . . . . . . . . . . . 2-14

LTR Mode Scanning. . . . . . . . . . . . . . . . . . . . . 2-14

Conventional Mode Scanning. . . . . . . . . . . . . . 2-15

Scan List Programming. . . . . . . . . . . . . . . . . . . 2-15

Saving Scan List . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Scan Delay and Continue Timers. . . . . . . . . . . 2-15

Transmitting In The Scan Mode. . . . . . . . . . . . 2-16

2.7 DIAL MODE . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Selecting Dial Mode . . . . . . . . . . . . . . . . . . . . . 2-17

Dialing a Number . . . . . . . . . . . . . . . . . . . . . . . 2-17

Sending the Number . . . . . . . . . . . . . . . . . . . . . 2-17

Storing Numbers in Memory . . . . . . . . . . . . . . 2-17

Recalling Numbers From Memory. . . . . . . . . . 2-18

Exiting Dial Mode. . . . . . . . . . . . . . . . . . . . . . . 2-18

2.8 LTR-NET AND LTR FEATURES . . . . . . . . .2-18

Standard Group Calls . . . . . . . . . . . . . . . . . . . . 2-18

Calls on Priority ID Codes . . . . . . . . . . . . . . . . 2-18

Block ID codes and Access Priority. . . . . . . . . 2-19

Transmit Inhibit . . . . . . . . . . . . . . . . . . . . . . . . 2-19

2.9 LTR-NET FEATURES. . . . . . . . . . . . . . . . . . .2-19

LTR-Net Standard Calls . . . . . . . . . . . . . . . . . . 2-19

LTR-Net Special Calls . . . . . . . . . . . . . . . . . . . 2-19

Busy Queuing/Free System Ringback . . . . . . . 2-22

Roaming (Auto-Registration). . . . . . . . . . . . . . 2-22

Over-The-Air Locality Channel Updates . . . . . 2-24

Transceiver Disable . . . . . . . . . . . . . . . . . . . . . 2-24

Home Channel Aliasing . . . . . . . . . . . . . . . . . . 2-24

2.10 LTR FEATURES . . . . . . . . . . . . . . . . . . . . . . .2-25

Standard Group Calls . . . . . . . . . . . . . . . . . . . . 2-25

Telephone Calls . . . . . . . . . . . . . . . . . . . . . . . . 2-25

LTR Features Not Available. . . . . . . . . . . . . . . 2-26

2.11 CONVENTIONAL FEATURES . . . . . . . . . . .2-26

Busy Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Monitor Mode. . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Transmit Disable On Busy . . . . . . . . . . . . . . . . 2-27

Squelch Adjust . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

Talk-Around . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

Call Guard Squelch. . . . . . . . . . . . . . . . . . . . . . 2-27

External Encoders And Decoders. . . . . . . . . . . 2-28

TABLE OF CONTENTS (CONT’D)

TABLE OF CONTENTS

November 2001

Part No. 001-7240-001

2.12 SUPERVISORY TONES

. . . . . . . . . . . . . . . .2-28

General Tones. . . . . . . . . . . . . . . . . . . . . . . . . . 2-28

LTR-Net Special Call Tones . . . . . . . . . . . . . . 2-29

LTR Telephone Call Tones . . . . . . . . . . . . . . . 2-29

Display Messages. . . . . . . . . . . . . . . . . . . . . . . 2-30

Menu Mode Messages . . . . . . . . . . . . . . . . . . . 2-31

2.13 TEST FUNCTIONS . . . . . . . . . . . . . . . . . . . . .2-31

2.14 ERROR CODES . . . . . . . . . . . . . . . . . . . . . . .2-31

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31

Reading Error Codes . . . . . . . . . . . . . . . . . . . . 2-32

3 PROGRAMMING

3.1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

Programming Setup . . . . . . . . . . . . . . . . . . . . . . 3-1

Minimum Computer Requirements . . . . . . . . . . 3-1

Remote Programming Interface (RPI) . . . . . . . . 3-1

RPI Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

EEPROM Data Storage . . . . . . . . . . . . . . . . . . . 3-2

Hardware Hookup. . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.2 MISCELLANEOUS PROGRAM INFORMATION

. . . . . . . . . . . . . . . . . . . . . . .3-2

Basic Windows Knowledge . . . . . . . . . . . . . . . . 3-2

Software Installation. . . . . . . . . . . . . . . . . . . . . . 3-2

Starting Program. . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.3 MAIN WINDOW DESCRIPTION. . . . . . . . . . .3-3

Title Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Menu Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Toolbar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Main Window Panes. . . . . . . . . . . . . . . . . . . . . . 3-4

Status Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.4 PROGRAMMING PROCEDURE . . . . . . . . . .3-4

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Programming Main Radio Parameters . . . . . . . . 3-4

Locality Programming . . . . . . . . . . . . . . . . . . . . 3-5

System Programming . . . . . . . . . . . . . . . . . . . . . 3-6

Group Programming. . . . . . . . . . . . . . . . . . . . . . 3-6

Bank Programming. . . . . . . . . . . . . . . . . . . . . . . 3-6

Programming Transceiver . . . . . . . . . . . . . . . . . 3-6

3.5 FILE MENU. . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

3.6 EDIT MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Edit Radio Type Screen . . . . . . . . . . . . . . . . . . . 3-8

Basic Parameters Screen. . . . . . . . . . . . . . . . . . . 3-8

Timing Parameters Screen . . . . . . . . . . . . . . . . . 3-8

Menu Items Screen. . . . . . . . . . . . . . . . . . . . . . . 3-9

Key Assignment Screen . . . . . . . . . . . . . . . . . . . 3-9

Edit Telephone Numbers Screen . . . . . . . . . . . . 3-9

Edit Locality Screen . . . . . . . . . . . . . . . . . . . . . 3-10

Edit System Screen. . . . . . . . . . . . . . . . . . . . . . 3-11

Edit Groups Screen. . . . . . . . . . . . . . . . . . . . . . 3-11

Edit Banks Screen. . . . . . . . . . . . . . . . . . . . . . . 3-11

Edit Unique ID Screen . . . . . . . . . . . . . . . . . . . 3-11

3.7 TRANSFER MENU . . . . . . . . . . . . . . . . . . . . 3-11

3.8 VIEW MENU . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.9 COMPORTS MENU. . . . . . . . . . . . . . . . . . . . 3-13

3.10 HELP MENU . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

3.11 ADDITIONAL PROGRAMMING INFORMATION

. . . . . . . . . . . . . . . . . . . . . . 3-13

Program Key . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Multiple Home Repeaters . . . . . . . . . . . . . . . . . 3-13

Channel Number Programming. . . . . . . . . . . . . 3-13

Repeater Numbering . . . . . . . . . . . . . . . . . . . . . 3-13

Specifying RIC-Equipped Repeaters. . . . . . . . . 3-14

Test Locality . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

3.12 UPDATING RADIO SOFTWARE . . . . . . . . 3-14

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Data File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

4 CIRCUIT DESCRIPTION

4.1 POWER SWITCHING AND REGULATION. 4-1

Power Switching . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Five-Volt Regulators (U205, U206) . . . . . . . . . . 4-1

4.2 SYNTHESIZER DESCRIPTION. . . . . . . . . . . 4-1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Receive and Transmit VCOs, Buffer

Amplifiers (Q503, Q533-Q535). . . . . . . . . . . 4-1

VCO and TCXO Modulation . . . . . . . . . . . . . . . 4-2

Synthesizer Chip (U202). . . . . . . . . . . . . . . . . . . 4-2

Lock Detect (Q201). . . . . . . . . . . . . . . . . . . . . . . 4-2

DC-DC Converter (U203), Loop Filter. . . . . . . . 4-2

4.3 RECEIVER CIRCUIT DESCRIPTION. . . . . . 4-3

RF Amplifier (Q301), First Mixer (Q302) . . . . . 4-3

IF Amplifier (Q401), Limiter/Mixer/

Detector (U401) . . . . . . . . . . . . . . . . . . . . . . . 4-3

Squelch Circuit (U401) . . . . . . . . . . . . . . . . . . . . 4-4

4.4 TRANSMITTER DESCRIPTION . . . . . . . . . . 4-4

Driver Amplifier (Q101), Power Amplifier

Module (U101). . . . . . . . . . . . . . . . . . . . . . . . 4-4

Antenna Switch and Low-pass Filter . . . . . . . . . 4-4

Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4.5 CONTROL LOGIC AND DISPLAY. . . . . . . . 4-5

Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Display Assembly Description . . . . . . . . . . . . . . 4-5

4.6 RECEIVE AUDIO PROCESSING . . . . . . . . . 4-8

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Bandpass Filter (U101) . . . . . . . . . . . . . . . . . . . . 4-8

Expander (U204). . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Audio Amplifier (U101, U102). . . . . . . . . . . . . . 4-9

4.7 RECEIVE AND TRANSMIT DATA PROCESSING

. . . . . . . . . . . . . . . . . . . . . . . 4-9

Receive Data Filter/Detector

(U102A/B, U103A/B) . . . . . . . . . . . . . . . . . . 4-9

Transmit Data Filter (U145A/B). . . . . . . . . . . . . 4-9

4.8 TRANSMIT AUDIO PROCESSING. . . . . . . 4-10

Gate (U203), High-Pass Filter (U151) . . . . . . . 4-10

TABLE OF CONTENTS (CONT’D)

TABLE OF CONTENTS

November 2001

Part No. 001-7240-001

Limiter (U151A). . . . . . . . . . . . . . . . . . . . . . . . 4-10

Low-Pass Filter (U146A/B) . . . . . . . . . . . . . . . 4-10

4.9 SMARTNET DATA PROCESSING . . . . . . .4-10

5 ALIGNMENT PROCEDURE

5.1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Special Test Code Required . . . . . . . . . . . . . . . . 5-1

5.2 LOADING OPERATING CODE . . . . . . . . . . .5-2

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Saving Personality Information . . . . . . . . . . . . . 5-2

Loading Test Code . . . . . . . . . . . . . . . . . . . . . . . 5-2

5.3 PCTUNE DESCRIPTION . . . . . . . . . . . . . . . . .5-3

PCTune Menu Bar . . . . . . . . . . . . . . . . . . . . . . . 5-3

Radio Tune Screen . . . . . . . . . . . . . . . . . . . . . . . 5-4

5.4 ALIGNMENT PROCEDURE . . . . . . . . . . . . . .5-5

Test Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

5.5 FREQUENCY CHECK/ADJUST. . . . . . . . . . .5-6

5.6 HIGH RF POWER ADJUST . . . . . . . . . . . . . .5-6

5.7 LOW RF POWER ADJUST. . . . . . . . . . . . . . .5-6

5.8 MODULATION BALANCE . . . . . . . . . . . . . . .5-6

5.9 DATA DEVIATION . . . . . . . . . . . . . . . . . . . . . .5-6

5.10 AUDIO DEVIATION . . . . . . . . . . . . . . . . . . . . .5-6

5.11 RECEIVE BANDPASS FILTER ADJUST. . .5-7

5.12 RSSI AND SQUELCH ADJUST . . . . . . . . . . .5-7

5.13 OPENING TRANSCEIVER . . . . . . . . . . . . . . .5-7

5.14 RECEIVER PERFORMANCE TESTS . . . . . .5-8

Preliminary Setup. . . . . . . . . . . . . . . . . . . . . . . . 5-8

SINAD Sensitivity . . . . . . . . . . . . . . . . . . . . . . . 5-8

Squelch Sensitivity. . . . . . . . . . . . . . . . . . . . . . . 5-8

Audio Power And Distortion . . . . . . . . . . . . . . . 5-8

Receiver Current Drain. . . . . . . . . . . . . . . . . . . . 5-8

5.15 TRANSMITTER PERFORMANCE TESTS. .5-9

Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Transmit Frequency . . . . . . . . . . . . . . . . . . . . . . 5-9

Transmit Modulation . . . . . . . . . . . . . . . . . . . . . 5-9

Transmitter Current Drain . . . . . . . . . . . . . . . . . 5-9

5.16 TEST CODE FUNCTIONS. . . . . . . . . . . . . . .5-10

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Test Channels . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Modulation Modes . . . . . . . . . . . . . . . . . . . . . . 5-10

Miscellaneous Functions . . . . . . . . . . . . . . . . . 5-10

Parameter Edit Modes . . . . . . . . . . . . . . . . . . . 5-11

6 LTR-NET OVERVIEW

6.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . .6-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Compatibility With LTR . . . . . . . . . . . . . . . . . . 6-1

LTR-Net Features. . . . . . . . . . . . . . . . . . . . . . . . 6-2

Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6.2 SYSTEM ARCHITECTURE. . . . . . . . . . . . . . .6-3

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Subscriber Units . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Repeaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

3000-Series Switch . . . . . . . . . . . . . . . . . . . . . . . 6-4

Call Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

System and Subscriber Manager. . . . . . . . . . . . . 6-5

6.3 STANDARD GROUP CALLS . . . . . . . . . . . . 6-5

6.4 WIDE AREA GROUP CALLS . . . . . . . . . . . . 6-5

6.5 SPECIAL CALLS. . . . . . . . . . . . . . . . . . . . . . . 6-6

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Auxiliary Calls . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Telephone Calls. . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Data Calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6.6 HOME CHANNEL BACKUP . . . . . . . . . . . . . 6-6

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Home Repeaters . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Status Repeaters . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Home Channel Aliasing . . . . . . . . . . . . . . . . . . . 6-7

6.7 OTHER LTR-NET FEATURES . . . . . . . . . . . 6-7

Unique ID Codes. . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Electronic Serial Number (ESN). . . . . . . . . . . . . 6-8

ESN and Unique ID Requests. . . . . . . . . . . . . . . 6-8

Interrogate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Kill and Sleep . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

Auto-Registration and De-Registration. . . . . . . . 6-8

New Channel Updates. . . . . . . . . . . . . . . . . . . . . 6-9

7 PARTS LIST

Complete Assemblies . . . . . . . . . . . . . . . . . . . . . 7-1

Flexible Cable Assembly. . . . . . . . . . . . . . . . . . . 7-1

Keypad/Display Board Assembly. . . . . . . . . . . . 7-1

RF Board Assembly . . . . . . . . . . . . . . . . . . . . . . 7-2

Logic Board Assembly . . . . . . . . . . . . . . . . . . . . 7-7

Mechanical Parts . . . . . . . . . . . . . . . . . . . . . . . . 7-11

8 SCHEMATIC DIAGRAMS AND

COMPONENT LAYOUTS

Interconnect Schematic . . . . . . . . . . . . . . . . . . . . 8-1

Transceiver-To-RPI Programming Cable . . . . . . 8-1

RF Board Schematic . . . . . . . . . . . . . . . . . . . . . . 8-2

RF Board Top View . . . . . . . . . . . . . . . . . . . . . . 8-3

RF Board Bottom View. . . . . . . . . . . . . . . . . . . . 8-3

Logic Board Schematic. . . . . . . . . . . . . . . . . . . . 8-4

Logic Board Top View . . . . . . . . . . . . . . . . . . . . 8-5

Logic Board Bottom View . . . . . . . . . . . . . . . . . 8-5

Display/Keypad Board Schematic. . . . . . . . . . . . 8-6

Display/Keypad Board Bottom View . . . . . . . . . 8-7

Display/Keypad Board Top View. . . . . . . . . . . . 8-7

Flex Circuit Layout . . . . . . . . . . . . . . . . . . . . . . . 8-7

Transceiver Block Diagram. . . . . . . . . . . . . . . . . 8-8

TABLE OF CONTENTS (CONT’D)

TABLE OF CONTENTS

November 2001

Part No. 001-7240-001

LIST OF TABLES

1-1 7243 Portable Accessories . . . . . . . . . . . . . . . . . .1-1

1-2 Charger Indicators . . . . . . . . . . . . . . . . . . . . . . . .1-4

2-1 Menu Mode and Option Switch Functions . . . .2-12

3-1 Menu and Option Sw. Parameter Descriptions .3-10

3-2 Locality Programming Screen Description . . . .3-15

3-3 System Programming Scre en Description . . . . .3-16

3-4 Group Programming Screen Description . . . . .3-17

3-5 Bank Programming Screen Description . . . . . .3-19

3-6 Call Guard Codes and Tones . . . . . . . . . . . . . . .3-20

4-1 Microprocessor U208 Pin Descriptions . . . . . . . .4-5

5-1 Test Channels . . . . . . . . . . . . . . . . . . . . . . . . . .5-10

LIST OF FIGURES

1-1 Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2-1 Top Panel Controls . . . . . . . . . . . . . . . . . . . . . . 2-1

2-2 Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2-3 Front Panel Keys . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2-4 Programmer Error Code Screen . . . . . . . . . . . 2-32

3-1 Programming Setup. . . . . . . . . . . . . . . . . . . . . . 3-1

3-2 Main Window . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3-3 Edit Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

5-1 Alignment Setup Diagram. . . . . . . . . . . . . . . . . 5-1

5-2 PCTune Tune Radio Screen . . . . . . . . . . . . . . . 5-4

5-3 Internal Adjustment Points . . . . . . . . . . . . . . . . 5-7

6-1 LTR-Net System Diagram. . . . . . . . . . . . . . . . . 6-1

1-1

November 2001

Part No. 001-7240-001

GENERAL INFORMATION

1.1 SCOPE OF MANUAL

This service manual contains operation, programming, alignment, and service information for the E.F. Johnson 7243 LTR-Net

™

portable transceiver.

1.2 TRANSCEIVER DESCRIPTION

The 7243 LTR-Net portable transceiver operates in the UHF 430-470 MHz frequency range. Power output is selectable for low (1 watt) and high (4 watt) levels.

A range of up to 16-100 systems are programmable, depending on the type and the number of groups in each. Systems can be programmed for LTRNet, LTR, and conventional operation. Each system can be programmed with up t o 99 groups. Current ly , all transceivers have a telephone keypad and three programmable option switches. Refer to Section 2.1 for more information on operating features.

1.3 PART NUMBER BREAKDOWN

The following is a breakdown of the part number used to identify this transceiver.

1.4 TRANSCEIVER IDENTIFICATION

The transceiver identification number is printed on a label that is attached to the chassis. The following information is contained in the identification number:

1.5 TRANSCEIVER TUNING

The field tuning procedure is described in

Section 5.

1.6 ACCESSORIES

The accessories available for this transceiver are listed in Table 1-1. A brief description of some of these accessories follows:

Extension Test Cable - This cable is requi red to operate the transceiver when it has been opened to access internal components. It reconnects the keypad/ display board to the audio/logic board.

Programming Hardware - The RPI provides the interface between the programming computer and

242 - 72 x 3 - x x 3

Band

Freq Range

Signaling

Type

3 = High Tier, dual BW

1 = VHF* 4 = UHF 8 = 800 MHz* 9 = 900 MHz*

2 = LTR* 4 = Multi-Net* 5 = SMARTNET/SmartZone* 6 = LTR-Net

0 = Full band (800/

900 MHz)* 1 = 400-440 MHz* 3 = 430-470 MHz 5 = 470-512 MHz*

* These configurations are

currently not available .

Table 1-1 7243 Portable Accessories

Accessory Part No.

Battery pack, nickel metal-hydride hi cap 587-7200-140 Rapid charger base, singl e uni t with

120 VAC power supply

585-7200-023

Antenna, hybrid UHF 585-7200-044 Belt clip 585-7200-032 Extension Test Cable

Contact Cust Serv

Programming Accessories

LTR-Net 7243/98xx programming

software, CD

023-9998-457

PCTune software and test code, CD 023-9998-489 PCFlash soft. & LTR-Net op. code, CD 023-9998-501

Remote Prog Interface (RPI) 023-9800-000 Programming cable (RPI to xcvr) 597-7200-031 DB9 F to DB9 M 6-ft cable 597-5900-002 DB-25 M to DB-9 F 6-ft cable 597-0005-057 DB-25 F to DB-9 M adapter 515-9000-015

7243 x A 25 1 U 12345

Model Revision

Letter

Manufacture

Date

Warrant

Numbe

Week No.

of Year

Last Digit of Yea

Plant

rom P.N.

6 = LTR-Net

SECTION 1 GENERAL INFORMATION

GENERAL INFORMATION

1-2

November 2001

Part No. 001-7240-001

transceiver. The cables from the RPI to computer and transceive r are not inclu ded with the R PI and must be ordered separately.

Programming Software

The following thre e types of pr ogrammi ng can b e

performed with 7243 portable transceivers:

Personality Programmin g

- This programming s et s t he parameters that can be different for each transceiver such as channel frequencies, system and group information, and locality information. This programming is performed by the LTR-Net Programming software, Part No. 023-9998-457, and described in Section 3 of this manual.

Transceiver Tuning (PCTune)

- Most transceiver adjustments are made electronically and stored by the logic. The software used to perform these adjustments is called PCTune, and it is described in Section 5.

NOTE: To run the PCTune software, the transceiver must first be re-flashed with temporary test operating software (see following).

Loading Different Operating Code (PCFlash)

- The PCFlash software is used to upgrade the actual operating software of the tran sceiver. This software is stored in a reprogrammable Flash memory device, and is the basic operating code of the transceiver.

The LTR-Net operating software may be changed to upgrade features, correct bugs, or tune the transceiver. Section 5.2 describes how temporary test operating code is loaded to tune the transceiver and LTRNet operating code is reloaded to restore normal operation. Test operating code is included on the PCTune CD, and LTR-Net operating code is included on the PCFlash CD (see Table 1-1).

1.7 FACTORY CUSTOMER SERVICE

The Customer Service Department of the E.F. Johnson Company provides customer assistance on technical problems and the availability of local and factory repair facilities. Regular Customer Servic e hours are 7:30 a.m. - 5: 30 p.m. Centr al T ime, Monday Friday. The Customer Service Department can be reached using the following telephone numbers:

Toll-Free: (800) 328-3911

FAX: (507) 835-6969

E-Mail: customerservice@efjoh nson.com You can

also e-mail a person directly if you know their first initial/last name (example: jsmith@efjohnson.com).

NOTE: Emergency 24-hour technical support is also available at the 800 and preceding numbers during off hours, holidays, and weekends.

When your call is answered at the E.F. Johnson Company, you will hear a brief messa ge informin g you of numbers that can be entered to reach various departments. This number may be entered during or after the message using a tone-type telephone. If you have a pulse-type telephone, wait until the message is finished and an operator will come on the line to assist you. When you enter some numbers, another number is requested to further categorize the type of information you need.

You may also cont act the Customer Service Department by mail. Please include all information that may be helpful in solving your problem. The mailing address is as follows:

E.F. Johnson Company

Customer Service Department

299 Johnson Avenue

P.O. Box 1249

Waseca, MN 56093-0514

1.8 FACTORY RETURNS

Repair service is normal ly availab le through local authorized E.F. Johnson Land Mobile Radio Service Centers. If local service is not avail able, the equipment can be returned to the factory for repair. However, it is recommended that you contact the Customer Service Department before returning equipment. A service representative may be able to suggest a solution to the problem making return of the equipment unnecessary.

Be sure to fill out a Factory Repai r Request Form #271 for each unit to be repaired, whether it is in or out of warranty. These forms are avai lable free of charge by calling Customer Service (see Section 1.7) or by requesting them when you send a unit in for

GENERAL INFORMATION

1-3

November 2001

Part No. 001-7240-001

repair. Clearly describe the difficulty experienced in the space provided and also note any prior physical damage to the equipment. Include this form in the shipping container with each unit. Your telephone number and contact name are important as there are times when the technicians may have specific questions that need to be answered in order to completely identify and repair a problem.

When returnin g equipment for repair, it is also recommended that you us e a PO number or s ome other reference number on your pap erwo rk i n case you need to call the repair lab about your unit. These numbers are referenced on the repair order and make it easier and faster to locate your unit in the lab.

Return Authorization (RA) numbers are not necessary unless you have been given one by the Field Service Department. RA numbers are required for exchange units or if the Field Service Depart ment wants to be aware of a specific problem. If you have been given an RA number, reference this number on the Factory Repair Request Form sent with the unit. The repair lab will then contact the Fiel d Service Department when the unit arrives.

For additional information on factory service, the Depot Service Department can be contacted at the following E-mail address:

depotrepair@efjohnson.com

1.9 REPLACEMENT PARTS

Replacement parts can be ordered directly from the Service Parts Departmen t. To order parts by phone, dial the toll-free number as described in Section 1.7. When ordering, please supply the part number and quantity of each part ordered. E.F. Johnson dealers also need to give their account number. If there is uncertainty about the part number, include the desig-

nator (C512, for example) and the model number of the equipment the part is from.

You may also send your order by mail or FAX. The mailing address i s as follows and the FAX number is shown in Section 1.7.

E.F. Johnson Company

Service Parts Department

299 Johnson Avenue

P.O. Box 1249

Waseca, MN 56093-0514

1.10 INTERNET HOME PAGE

The E.F. Johnson Company has a site on the World Wide Web that can be accessed for information on the company about such things as products, systems, and regulations. The address is http://www.efjohnson.com.

1.11 DISASSEMBLING TRANSCEIVER

Proceed as follows to sep arate the f ront c over an d chassis:

1. Remove the battery pack and antenna.

2. Remove the two screws located on the back.

3. The front cover and chassis hinge at the top, so ca re-

fully separ ate the lower end of the chassis from the cover and pivot the lower end outward.

4. When reassembling these parts, make sure that the

rubber perimeter gasket is in the groove (if necessary, hold it in the curved area with your fingers).

NOTE: To operate the transceiver with the front and back separated, the ext ens ion test cable listed in Table 1-1 is required.

GENERAL INFORMATION

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November 2001

Part No. 001-7240-001

1.12 BATTERY CHARGER INFORMATION

1.12.1 GENERAL

The battery pack for the 7243 portable contains six nickel metal hydride (NiMH) batteries connected in series. Nominal battery pack voltage is 7.5 volts and battery capacity is 1450 mAH.

The 7243 charger shown in Figure 1-1 has two slots in which to place a battery. The back slot is for fast charging and the front slot is for slow charging. Only the battery can be inserted in the fast charge slot and the entire transceiver can be ins erted in the slow charge slot if desired. Batteries can be charged in both slots at the same time. The operation of the LEDs is shown in Table 1-2.

Figure 1-1 Battery Charger

1.12.2 FAST CHARGING

When a battery is placed in the fast charge slot, the fast charge indicator briefly flashes red while the battery is checked to determine if its temperature is within the required ra nge (0 to +45 ° C/+32 to +113°F). If it is, fast charging begins and it changes to steady red. The fast charge rate is 1320 mA ±100 mA. When the battery is nearly fully charged, it switches to the trickle rate of 20-40 mA and the indicator turns green. It continues at the trickle rate until the battery is removed from the charger. Approximate charge time in this slot for a fully discharged battery is 1.5 hours.

The charger uses the ∆T/∆t (change in temp era-

ture/change in time) method to sense that the battery is nearly full y charged and th at switching to the trickle mode should occur. This method detects when the battery temperature begins increasing at a faster rate which normally provides the first indication that the battery is fully charged.

To provide fail-safe operation, the trickle rate is also selected if the battery temperature rises above +50° C (+122° F) or charge time in the rapid mode exceeds 90 minutes ±20%.

NOTE: Occasionally , a full y char ged conditi on may be falsely detected a nd the trick le mode entered after only a few minutes of rapid charging. To resume normal rapid charging if this occurs, momentarily lift the battery out of the slot.

1.12.3 SLOW CHARGING

Batteries charged in the front slot are always charged at the slow rate of 100-120 mA. The slow charge indicat or tur ns gre en when charging is occurring. Typical charge time in this slot for a fully discharged battery is 20 hours (with transceiver power turned off if a pplica ble). If the trans ceive r p ower is on, this slot ba sically main tains the charge of the battery.

Fast Charge Slot Slow Charge Slot

Fast Charge Slot

Slow Charge Slot Indicato

Indicator

Table 1-2 Charger Indicators

Indication

Indicator

Fast Charge Slow Charge

Flashing Red [1] Checking battery

condition

N/A

Constant Red Rapid charge mode N/A Constant Green Trickle charge mode Slow charge mode Off [2] No charging is

occurring

No charging is occurring

[1] If condition persists, battery temperature may not within required range (0 to +45° C). [2] Possible causes are poor contact (clean the charger and battery contacts) or a defective battery.

GENERAL INFORMATION

1-5

November 2001

Part No. 001-7240-001

7243 SPECIFICAT IONS

The following are general specifications intended for use in testing and servicing the transceiver. For current advertised specifications, refer to the 7243 product information sheet available from your E.F. Johnson sales representative. Specifications are subject to change without notice.

GENERAL

Operating Mode LTR-Net/LTR (trunked), and conventional (non-trunked) Frequency Range 430-470 MHz Systems Programmable Up to 16-100 depending on system type and number of groups Groups Programmable Up to 99 per system Transmit /Re cei ve Separation Within cha nnel spread, 0 MHz conventional talk-around Channel Spacing 12.5 kHz - 2.5 kHz maximum deviation

25 kHz - 5 kHz maximum deviation Frequency Stability (tx and rx) 2.0 PPM –22° to +140° F (–30° to +60° C) Dimensions (with battery and controls) 5.7" H x 2.2" W x 1.4" D

145mm H x 55mm W x 35mm D Weight (with battery) 15 oz. (410 g) Power Source 7.5 VDC nickel metal-hydride (NiMH) battery pack, 1450 mAH Typical Battery Life (5-5-90) 7.3 hours (high power), 9.9 hours (low power) Compliance FCC parts 15 and 90 Circuit Protection 3-ampere fuse

RECEIVER

Sensitivity 0.35 µV (12 dB SINAD) Selectivity –65 dB at 25 kHz /–60 dB at 12.5 kHz Spurious and Image Reject ion –65 dB Intermodulation –65 dB Audio Output Power Internal Speaker - 0.5 watt (16-ohm load)

External - 1.5 V rms (680-ohm load) Audio Distortion Less than 5% at rated power (0.5 watt) Audio Response +1, –3 dB at 6 dB per octave de-emphasis characteristic Channel Spread 40 MHz Current Drain Standby (squelched) - 100 mA maximum

Rated Audio Output - 275 mA maximum

TRANSMITTER

High RF Power Output 4.0 watts Low RF Power Output 1.0 watt Spurious and Harmonic –60 dB FM Hum and Noise –40 dB at 25 kHz, –34dB at 12.5 kHz Audio Distortion 5% maximum at 1 kHz Audio Frequency Response +1, –3 dB from a 6 dB per octave pre-emphasis characteristic Audio Modulation 11K0F3E, 16K0F3E Channel Spread 40 MHz Current Drain (maximum) Low Power - 950 mA

High Power - 2 A Load Impedance 50 ohms Duty Cycle (3-3-54 seconds) 5% (Transmit-Receive-Standby)

2-1

November 2001

Part No. 001-7240-001

OPERATION

SECTION 2 OPERATION

Figure 2-1 Top Panel Controls

2.1 FEATURES

2.1.1 GENERAL FEATURES

The following features are available in all oper-

ating modes (LTR-Net/LTR/conventional).

• Up to 16-100 systems pro grammable depending on

type (LTR-Net/LTR/conv) and number of gr oups in each.

• Up to 99 groups programmable per system

• LTR-Net

™

, LTR®, and conventional operating

modes

• Unique 8-character system a nd group ide ntifica tion

tags

• System and group scanning

• User programmable system and group scan lists

• Menu mode to select functions

• Telephone mode for convenient number dialing

• Three programmable option switches

• Keypad lock (with and without password)

• Call indicator

• Time-out timer

• Receive-only groups

• Companding

2.1.2 LTR-NET FEATURES

The following features are available when an

LTR-Net system is selected.

• Roamin g (automatic locality search)

• Special calls including telephone, unique ID, and

directed group

• Busy queuing of special calls by radio system

• Transmit inhibit

• Receive priority calls

• Standard group calls (mobile-to-mobile)

• Automa tic registration/de-registration

2.1.3 LTR FEATURES

The following features are available when an

LTR system is selected.

• Standard group and telephone calls

• Transmit inhibit

• Receive priority calls

2.1.4 CONVENTIONAL FEATURES

• Busy indicator

• Talk-around

• User-adjustable squelch level

• Monitor mode

• Call Guard

squelch control

• Transmit disabl e on busy

NOTE: Programming determines the availability of many of the preceding features.

Antenna Jac

On-Off/Volume

Microphone

Speake

Option

Switch 1

Accessor

Connecto

OPERATION

2-2

November 2001

Part No. 001-7240-001

Figure 2-2 Display

BUSY

UID

System

Scan List

Phone

Group

Group Scan

List

Scan

Call

8-Character

Alphanumeric

MonitorNot Used

Keypad

Dial

Mode

Low

Power

Not

Used

Priority

Transmitter

Keyed

Lock

UID/Aux

Group

Low

Battery

Not

Used

Conv Ch

Busy

Display

2.2 CONTROLS AND DISPLAY

2.2.1 TOP AND SIDE CONTROLS

NOTE: These controls are shown in Figure 2-1.

On-Off Volume - Turning this knob clockwise turns power on and sets the volume level. Turning it counterclockwise to the detent turns power off. Power is on when information appe ars in the display. Refer to Section 2.3.3 for more information on setting volume.

Option Switch 1 - This switch can be programmed to control a specific function (see Section 2.5.1).

Antenna Jack - Connection point for the ante nna.

Accessory Connector - When the protective cover is

removed, this connector can be used to access PTT, speaker, and microphone lines for transceiver service and testing. It is also the connection point for the computer when programming the transceiver.

Battery Release Button (Not shown) - This button is located on the bottom end of the transceiver, and it is pressed to r elease the battery so that it can slide downward and be removed from the radio.

NOTE: Turn off transceiver power before removing the battery. This ensures that current settings are properly saved and the de-registration message is sent.

2.2.2 SIDE CONTROLS

Option Switch 2 - This switch can be programmed to control a specific function (see Section

2.5.1).

PTT (Push-To-Talk) - This switch keys the tr ansmitter so that a message can be transmitted. The “

Tx” icon is displayed when the

transmitter is keyed.

Option Switch 3 - This switch can be programmed to control a specific function (see Section

2.5.1).

2.2.3 DISPLAY

8-Character Alphanumeric Display - This area of the display indicates the selected system and group (Section 2.3.4), dialed number (Section 2.7), error conditions, and other information (Section 2.12.4).

- Indicates that the displayed system is in the scan

list and scanned normally (see Section 2.6.7).

- The base portion of this icon is displayed when

the displayed group is programmed for telephone calls, and the top portion (receiver) is displayed when the dial mode is selected (see Section 2.7).

Option

Switch 2

PTT

Switc

Option

Switch 3

OPERATION

2-3

November 2001

Part No. 001-7240-001

- Not curren tly used.

L - Indicates that low transmit power is selected (see

Section 2.4.8).

- Indicates that the scan mode is selected (see

Section 2.6.1).

- Not currently used.

C - Indicates that a call has been received on a group

programmed for a call indicator (see Section 2.4.2). Press any key to turn this indication off.

- Indica tes that th e monitor mode has bee n enabled

by the Monitor option switch (see Section 2.11.2).

- “

P” indicates that the displayed grou p is an

L TR-Net /LTR priority 1 group, and “

P2” indicates that

it is a priority 2 group (see Section 2.8.2).

- Indicates that the displayed group is in the scan

list and scanned normally (see Section 2.6.7).

BUSY - Indicates a carrier is being detected on the

selected conventional channel.

- Not currently used.

- Indicates a low battery condition. The

battery should be recharged soon after this indicati on appears (see Section 2.3.8).

UID - Indicates that the displayed group is

programmed for an LTR-Net Unique ID or Directed Group call (see Section 2.9.1).

- Indicates that the keypad has been locked by

pressing FCN or FCN (see Sectio ns 2.3.6 and

2.3.7).

Tx - Indicates t hat the transmitter is keyed. This

occurs when the push-to-talk switch is pressed or a register/de-register message is sent (see Section 2.9.4).

2.2.4 FRONT PANEL KEYS

The front panel keys are shown in Figure 2-3

above. Most keys control two or more functions. The

Figure 2-3 Front Panel Keys

function labeled on the key is usually selected by simply pressing the key, and the function la beled under the key is usually selected by first pressing another key such as the FCN (Function).

In addition, one set of key functions may be available in the standard mode and another in the dial mode (see Section 2.7). All key functions except 0-9 can also be assigne d to an opti on switch a nd control led by both as described in Section 2.5.1. Holding a key down causes repeating if applicable. These keys operate as follows:

FCN (SCAN)

Standard Mode

FCN - Enables the alternate function of the next key

that is pressed. This alternate function is active for 2 seconds or until anot her key is pressed, whichever occurs first.

FCN SCAN - Turns scanning on and off.

Dial Mode

FCN - Selects the alte rnate function of various keys

as described in the follow ing information.

SYS (RCL)

Standard Mode

SYS - Pressing repeatedly selects next hig her system.

SYS - Selects the next hi gher system. SYS - Selects the next lower system. SYS (xx) - Directly selects specified system. FCN RCL - Momentarily displays the selected

(revert) system if it is not being displayed.

OPERATION

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November 2001

Part No. 001-7240-001

Dial Mode

RCL - After recalling a number, scrolls through

other numbers programmed in memory.

FCN RCL (0-9) - Recalls the number stored in the

specified memory location.

FCN RCL - Recalls the last number recalled

from memory.

FCN RCL - Recalls the last number sent by FCN

SND.

GRP (CLR)

Standard Mode

The GRP key changes or displays the selec ted group

similar to the “SYS” key just described.

Dial Mode

CLR - Erases the last digit in the display. FCN CLR - Erases the en tire number in the display.

1 (HOME)

Standard Mode

FCN HOME - Selects the pre-programmed home

system/group.

1 - Pressing this key with the PTT switch pressed

transmits the “1” digit.

Dial Mode

1 - Dials the “1” digit.

2 (PHONE)

Standard Mode

FCN PHONE - Selects the dial mode and the first

telephone group in the current system.

2 - Pressing this key with the PTT switch pressed

transmits the “2” digit.

Dial Mode

2 - Dials the “2” digit. FCN PHONE - Exits the dial mode and sends the

call termination characters.

3 (DIAL)

Standard Mode

FCN DIAL - Selects the dial mode without

changing the currently selected group.

3 - Pressing this key with the PTT switch pressed

transmits the “3” digit.

Dial Mode

3 - Dials the “3” digit.

FCN DIAL - Exits the dial mode without sending

the call termination characters.

4 (PAGE)

Standard Mode

FCN PAGE - The page function is currently not

available.

4 - Pressing this key with the PTT switch pressed

transmits the “4” digit.

Dial Mode

4 - Dials the “4” digit.

5 (MENU)

Standard Mode

FCN MENU - Selects the menu mode (Section

2.5.2).

5 - Pressing this key with the PTT switch pressed

transmits the “5” digit.

Dial Mode

5 - Dials the “5” digit.

6 (SQL)

Standard Mode

FCN SQL - Selects the squelch adjust mode for

conventional channels (Section 2.11.4).

6 - Pressing this key with the PTT switch pressed

transmits the “6” digit.

Dial Mode

6 - Dials the “6” digit.

7 (S.A/D)

Standard Mode

FCN S.A/D (System Add/Delete) - Changes the

scan list status of the currently displayed system. The system is in the scan list and scanned normally if “ ” is displayed when not scanning.

7 - Pressing this key with the PTT switch pressed

transmits the “7” digit.

Dial Mode

7 - Dials the “7” digit.

8 (SEND)

Standard Mode

8 - Pressing this key with the PTT switch pressed

transmits the “8” digit.

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Dial Mode

8 - Dials the “8” digit. FCN SEND - Automatically transmits the number

in the display (after the system has been accessed by briefly pressing the PTT switch).

9 (G.A/D)

Standard Mode

FCN G.A/D (Group Add/Delete) - Change s the sc an

list status of the currently displayed group. The group is in the scan list and scanned normally if “ ” is displayed when not scanning.

9 - Pressing this key with the PTT switch pressed

transmits the “9” digit.

Dial Mode

9 - Dials the “9” digit.

0 (STR)

Standard Mode

FCN STR - Changes between the numeri c and alpha

display modes (Section 2.3.4).

0 - Pressing this key with the PTT switch pressed

transmits the “0” digit.

Dial Mode

0 - Dials the “0” digit. FCN STR (0-9) - Stores the displayed number in

the specified memory location.

()

Standard Mode

- Pressing this key with the PTT switch pressed

transmits the “ ” digit.

SYS - Selects the next lower system (see

preceding “SYS” key descri ption).

GRP - Selects the next lower group (see

preceding “GRP” key description).

FCN - Selects keypad (password) lock feature.

Dial Mode

- Dials the “ ” digit.

FCN - Enters a pause when dialing a telephone

number.

FCN RCL - Recalls the last number recalled

from memory.

()

Standard Mode

- Pressing this key with the PTT switch pressed

transmits t he “ ” digit.

SYS - Selects the next higher system (see

preceding “SYS” key descri ption).

GRP - Selects the next higher group (see

preceding “GRP” key description).

FCN - Selects the keypad (standard) lock

feature.

Dial Mode

- Dials the “ ” digit.

FCN - Displays the overflow digits. FCN RCL - Recalls the last number sent by FCN

SND.

2.3 BASIC OPERATION

2.3.1 POWER-UP SEQUENCE

When power is turned on using the top panel onoff/volume control, a beep sounds, the backlight turns on, all segments and icons in the display are momentarily enabled, and the last seven digits of the transceiver part number (see Section 1.3) are very briefly displayed. The transceiver is then operational.

2.3.2 BACKLIGHT OPERATION

The display and keypad backlight automatically turns on for 3 seconds whenever any key is pressed or power is turned on. If the Backlight menu parameter is enabled (see Section 2.5.2), selecting “On” enables this operation and selecting “Off” disables it entirely.

2.3.3 SETTING VOLUME LEVELS

The relative volume level can be determined by noting the positio n of t he index on the volume k nob. A tone or background noise may also be enabled for use in setting the volume as follows:

• If key press tones are enabled, a short tone sounds

whenever any key is pressed.

• If a conventional system is se lected and th e monitor

option switch is programmed (see Section 2.11.2), press this switch. If someone is talking on the channel, voice is heard. If no one is talking, the squelch can be adjusted as described on Section

2.11.4 so that noi se is he ard. The t ransceiv er cannot be manually unsquelched whe n an LTR-Net or LTR system is selected.

###

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2.3.4 SYSTEM/GROUP DISPLAY MODE

T wo sys tem/group d isplay modes can be sele cted. One is a numeric format and the other is an alpha tag format. To switch between these modes, press FCN STR or select the S/G DISPL menu parameter (see Section 2.5.2). Turning power off does not change the selected mode. These modes operate as follows:

Numeric Mode

- The system and group numbers are

displayed as “Sxx Gxx” and the group alpha tag is not displayed. For example, System 1 and Group 2 are displayed as follows. When system or group scanning is occurring, the numbers are replaced by dashes (see Section 2.6.2) .

Numeric Display Mode

Alpha Tag Mode - The group alpha tag is displayed instead of the system and group numbers. For example, the “CAR 220” group is displayed as follows. When system or group scanning is occurring, the alpha tag is replaced by “SYS SCAN or “GRP SCAN” (see Section 2.6.2). To briefly display the selected system number, press FCN RCL.

Alpha Tag Display Mode

2.3.5 SYSTEM AND GROUP SELECT

Systems and groups are selected as follows. When the system is changed, the last selected group in the new system is displayed.

• To increase the selected system, press SYS repeat-

edly or press SYS and then ( ). Likewise, to increase the selecte d group, press GRP repeatedly or press GRP . Holding the key down causes the function to repeat. Af ter the highest system or group is selected, wrap-around to the lowest system or group occurs.

• To d ecrease the sele cted system, press SYS and then

( ). Likewise, to decrease t he selected group,

press GRP . As when selecting a system, holding the key down causes the function to repeat, and after the lowest system or group is selected, wraparound occurs.

• To directly select a system or group number, press

SYS or GRP and then the number of the desired system or group. For example, to select Group 9, press GRP, 0, 9. A leading “0” must be entered to select systems and groups 1-9.

2.3.6 KEYPAD DISABLE (STANDARD)

Occasionally, the front panel keys may be accidentally pressed, for example, if the transceiver is carried on a belt and it brushes against an object. To prevent this from happening, the front panel keys and option switches can be quickly disabled by simply pressing FCN . The disabled condition is indicated by the icon.

If a key or option switch is then pressed, all that happens is “LOCKED” is displayed. The on-off/ volume and PTT controls remain functional so that calls can be received and transmi tt ed. To re-enable the keys and option switches, press FCN again. Turning power off does not change the selected mode.

2.3.7 KEYPAD DISABLE (USING PASSWORD)

To prevent unauthorized changing of the selected system and group and other operating parameters, the keypad and option switches can be disabled using a password. To select this disable mode, press FCN . “PASSWORD” is then displayed to indicate that a four-digit unlock password must be entered. This password can be any four -dig it number e xcept “0000 ”. The desired password must be entered tw ice (the second time is to confirm it). The keypad and option switches are then disabled as indicated by “LOCKED” and in the display.

If a key or option switch is then pressed, all that happens is “PASS LCK” is displayed. To re-enable the keypad and option switches, press FCN again and re-enter th e four-digit password. As with the disable mode described in the preceding section, the on-off/ volume and PTT controls remain active so that calls can be received and transmitted normally.

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NOTE: This password is not preprogrammed and there is no override procedure. Therefore, if it is forgotten, the transceiver must be reprogrammed to return it to normal operation.

2.3.8 LOW BATTERY INDICATION

When the batter y voltage drops t o the p oint wh ere

recharging is r equir ed, the icon is indi cated i n the bottom part of the display. In addition, a beep sounds when this indication initially appears and whenever the push-to-talk switch is released (if the key press tone is enabled). The battery should be recharged as soon as practical after this indication appears.

Low transm it power is au tomatically selected

during a low battery condition (indicated by “

L” in

display), and the cur re nt s et ti ngs of switches and other parameters continue to be saved in memory. The lowbattery indication is reset by turning power off and then on again.

2.3.9 OPTION SWITCHES

This transceiver has three option switches that can be programmed to control various functions as described in Section 2.5.1. These switches are the push-button switch on the top panel, the switch immediately above, and the switch immediately below the PTT switch on the side panel.

2.3.10 DISPLAYING SOFTWARE REVISION

NUMBER

To display the operating (Flash) software version number, turn power on with PTT switch pressed. The version number is displayed as “VER x.xx”. To return to normal operation, press FCN RCL or cycle power. The software version number can also be read using the progra mmer by selecting the Transfer > R ead Factory Info function (see Section 3.7).

2.3.11 LTR-NET, LTR, AND CONVENTIONAL

OPERATION

Introduction

This transceiver can be progr ammed to opera te in the LTR-Net, LTR, and conventional modes. Each selectable system can be programmed to select a

locality programmed for one of thes e modes. The type of operation that is programmed is determined by the type of repeater equipment being accessed. The differences in operation are described in the following information and also noted elsewhere as required.

LTR-Net and LTR Operation

The LTR-Net mode provides the most op erating features. Some features available only in the LTR-Net mode include roaming (automatic locality search), unique ID calls, and directed group calls. LTR-Net features are described in Sections 2.8, and a general overview of LTR-Net operation is located in Secti on 6.

Operation in the LTR mode is si milar to the LTRNet mode except that the preceding and some other LTR-Net features are not available.The types of calls that can be placed in the LTR mode are standard group (mobile-to-mobile) and telephone. LTR features are described in Sections 2.8 and 2.10 and also in the LTR Application Note, Part No. 009-0001-020, Rev. 8 or later.

Both the LTR-Net and LTR modes provide automatic channel selection (trunking) and monitoring before tran smitting. Special tones and display messages indicate busy and out-of-range conditions. Telephone calls can be placed almost as conveniently as with your home telephone. The information programmed in LTR-Net and LTR systems and groups is describe d in Section 2 .3.12.

Conventional Operation

In the conventional mode, selecting a system selects a radio channel, and selecting a group selects the squelch control cod ing (CTCSS, CDCS, or carri er) and other parameters (see Section 2.3 .12). The sq uelch level must be adjusted manually as described in Section 2.11.4 to properly receive conventional calls.

With conventional operation, an out-of-range condition is not indicated by a special tone or display message because there is no data handshake with a repeater th at allows this condition to be detected. A busy condition is detected automat ica ll y if the Transmit Disable On Busy feature is used (see Section

2.11.3). Otherwise, it must be detected manually as follows. Refer to S ectio n 2.11 for more information on conventional operation.

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To manually monitor a conventional channel before transmitting to determine if it is being used by someone else, proceed as follows:

Using Busy Indicator - With scanning disabled and the squelch control adjusted as described in Section

2.11.4, note if “

BUSY” is indicated in the lower part

of the display. If it is, a carrier is being detected on the currently selected conventional system (channel). If this indication is not displ ayed, th e channel is not busy and the message can be transmitted.

Using Monitor Mode - If scanning, pressing the Monitor option switch (see Section 2.5.1) disables scanning and enables the monitor mode indicated by

in the display. The monitor mode disables squelc h

control features so that all messages are heard. If none are heard, the channel is free and the message can be transmitted. Refer to Section 2.11.2 for more information on monitoring.

2.3.12 LOCALITIES, SYSTEMS, AND G ROUPS

When any call is placed, a locality, system, and group are selected. Definitions of these terms follow.

Localities

An LTR-Net or LTR locality is typically a single repeater site in which the repeaters are co-located and interconnected by a common bus to form a trunked channel group. A conventional locality may or may not include repeaters at the same physical site. A locality can include up to twenty repeaters.

Unique locality parameters include the channel frequencies and bandwidth of each repeat er at the site, the status repeater (LTR-Net only), and the repeaters equipped with telephone interconnect (LTR only) and companding. Up to approximately 25 LTR-Net or 60 LTR/conventional localities can be programmed (the maximum number decreases as the number of banks, systems, and groups increases).

Systems

Systems are a collection of groups and other information unique to that system (see next paragraph). Each system is linked to one of the programmed localities, and up to 99 systems can be programmed. Each system is programmed with a

unique alpha tag and can have a different display number in each bank (see Section 2.4.1).

LTR-Net and LTR systems are programmed with the home repeater number, a collection of groups, and a transmit inhibit block of ID codes (see Secti on

2.8.4). The home repeater number and group ID code form the address for gr oup c al ls . In a ddi ti on, t he home repeater is monitored for incoming call information (the status repeater serves as a backup with LTR-Net operation).

Conventional systems select a specific radio channel and include one or more groups, each of which can select unique coded sq uelch information on that channel (see following).

Groups

The groups assigned to a sys te m s ele ct ind ivi dual call information. Up to 99 groups can be assigned to each system. With all three types of operation, each group is programmed with a unique alpha tag, group scan, call indicator, and other information. The available group types are as follows.

LTR-Net Group Types

Dispatch

- Used to pl ace a nd receive standard group (mobile-to-mobile) calls. Encode and decode IDs from 1-239 can be specified.

Telco

- Used to place and receive telephone calls.

Auxiliary

- Used to place and receive unique I D and

directed group calls.

Data

- Currently not available.

LTR Group Types

Dispatch

- Used to pl ace a nd receive standard group (mobile-to-mobile) calls. Encode and decode IDs from 1-250 can be speci fied when a ccessi ng an LTR locality (site). If an LTR-Net locality is being accessed, IDs from 1-239 can be specified.

Telco

- Used to place and receive telephone calls. A RIC (interconnect) ID is also specified. This code is one that has been reserved on the rep eater system for telephone calls.

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Conventional Group Types

Only dispatch calls can be programmed with conventional operation. Conventional groups select Call Guard squelch, group scan, call indicator, and other information.

2.3.13 PLACING AND RECEIVING STANDARD

GROUP CALLS

General

These calls are between two or more mobile or control station transceivers. The main difference between these calls and the other types is that no number is dialed using the keypad. The following procedure applies to all three types of operation (LTRNet, LTR, and conventional).

Placing a Standard Group Call

1. Turn transceiver power on and set the volume as

described starting with Section 2.3.1. With conventional operation, also make sure that the squelch is properly set as described in Section 2.11.4.

2. Select the system and group of the mobile being

called as described in Section 2.3.5.

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

channel manually or automatically as described in Section 2.3.11.

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

switch to talk and release it to listen. Operation with L TR-Net, L TR, and conventional calls is as follows:

LTR-Net and LTR Operation

• If tones are enabled, the proceed tone sounds

shortly after the P TT switch is pressed if the radio system was successfully accessed (see Section

2.4.9). If tones are disabled, no tone sounds when the system is successfully accessed.

• If the radio system is busy, the busy tone sounds

(see Section 2.12) and “BUSY” is indicat ed in the display . If the P TT switch con tinues to be pressed, the system is accessed as soon as it is free.

• If the radio system could not b e accessed b ecause

of an out-of-range condition or some other reason, the intercept tone sounds (see Section

2.12) and “NO ACCES” is indicated in the display. The PTT switch must then be release d and pressed again to make another access attempt.

• When responding, busy or no access conditions

may also occur the same as when placing a call because the system is re-accessed for each transmission with thes e calls.

Conventional Operation

• If the channel is busy and the Transmit Disable

On Busy feature is programmed (see Section

2.11.3), “DSBL BSY” is indicated in the display and the transmitter is di sabled. 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 P TT switch is presse d (if the channel is not busy). If the proceed tone is enabled on conventional systems, it indicates wh en speaking can begin but does not indicate that the channel is fr ee or has been successfully accessed.

2.3.14 RECEIVING A STANDARD GROUP CALL

1. Select or scan the system and group progr ammed for the call you want to re ceive (see Section 2.6.1 for scan information).

2. When the message is received, the display changes to the system and group of the call. Press the PTT switch to talk and release it to listen. If sc anning or if a priority call is received, a respons e may not automatically occur on the group of the call. Refer to Section 2.6.10 for more informati on.

2.4 GENERAL FEATURES

2.4.1 BANK SELECT

A bank is a collection of s electable systems that have been set up for a specific application. For example, one bank c ould be progr ammed for o peration in Minneapolis and another for operation in

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Milwaukee. Up to sixteen banks can be programmed, and each bank is identified by a unique alpha tag.

Banks are s elected by the BANK menu parameter . In the menu mode, select t he “BANK SEL” parameter and then the desired bank as described in Section 2.5.2. If this menu parameter is not available, banks are not selectable.

When a different bank is selected, the last selected sy stem in that bank is displayed, and the displayed group is the last selected group of that system. These are the only user sel ec ted functions that are stored on a per bank basis.

Any progr ammed syst em can be assigned to a bank, and the system numbering can be different for each bank. Only the systems in the currently selected bank are selected or scanned, and at least one bank is always programmed. Unique bank parameters include Home system/group (see Section 2.4.6), default scan enable status, and default scan list status of each system.

The default scan status of the bank is valid only until the first time it is changed by the scan enable (FCN SCAN) key. Cycling power or re-selecting the bank does not restore the prog rammed status.

Likewise, the default s can list param eter permit s the default sca n list stat us of each sy stem to be set on a per bank basis. If the SCN SAVE menu parameter is then disabled and the default set to “Off”, the scan list status of that system in that bank returns to the default status whenever power is cycled . Otherwise, the default status is valid onl y until the first time the scan list status is changed by the S.A/D function.

2.4.2 CALL INDICATOR

The call indicator is “C” in the upper part of the display (see following il lus tration). This indicator shows when a call was received while you were away from the radio. Individual groups can be programmed for this feat ure and it then turns on when a call is received on one of those groups.

This indicator i s turned off by pressi ng any butt on or cycling power. If scanning and the “Last Received” configuration is programmed (see Section 2.6.10), the

system and group of the last call are displayed. Otherwise, the currently selected system/group is displayed.

Each selectable group can be progr ammed so that the Call indicator is activated when a call is received. With conventional operation, the Call indicator is activated if the transceiver unsquelches for 2 seconds or longer. Therefore, if Call Guard squelch is programmed, it must also be detected for the call indication to appear (unless it is disabled by the monitor mode).

2.4.3 COMPANDING

The companding feature is st andard with this transceiver and is ava ilable if it is enabled by programming. Companding improves audio quality by decreasing the amount of noise present in the audio signal. It does this by providing a 2:1 compression of the audio signal on the transmit end and a 1:2 expansion on the receive end. Companding is especially recommended for 12.5 kHz bandwidth channels because audio quality improvement is usually significant.

If this feature is used, it m ust be utilize d in both the transmitting and receiving mobile. The best results are obtained if companding is also used in the repeater; however, improvement still results if it is used in only the mobile and handheld transceivers. With telephone calls, companding must be utilized at the repeater if it is used in the mobile.

Each locality (site) channel can be individually programmed for companding. Whenever a call is received or transmitted on one of those channels, companding is automatically enabled. Companding is not selectable by the user, and the companding status is not indicated in the display.

2.4.4 EMERGENCY SWITCH

The emergency switch function is not available with this transceiver.

Call

Indicator

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2.4.5 ENCRYPTION

Encryption is currently not available.

2.4.6 HOME SYSTEM/GROUP SELECT

The Home Select feature provides a home system/group quick select by pressing FCN HOME. The home system/group programmed for the current bank is then displayed and it becomes the selected system/group. If no home system/group has been programmed, this function i s not available. If the home system/group is selected while scanning, scanning stops for the programmed scan delay period.

2.4.7 OPTION SELECT

Option select is currently not available.

2.4.8 POWER SELECT

Either high (4 watts) and low (1 watt) transmit power output is pro grammable on e ach lo cality (powe r output is not user selectable). When low power output is selected, “

L” is indicat ed in the display. The low

power mode usually increases battery life and decreases range, and the high power mode usually causes the opposite to occur. The low power mode is automatically selected during a low battery condition (see Section 2.3.8).

2.4.9 PROCEED (CLEAR-TO-TALK) TONE

This is a tone that sounds shortly after the PTT switch is pressed to indicate that the radio system has been accessed and speaking can begin. This tone can be programmed to be a single or distinctive (3-beep) tone.

This tone always sounds with LTR-Net and LTR standard group calls if tones are enabled (see Section

2.4.12). It can also be programmed to sound with LTR-Net/LTR telephone and auxiliary calls (first access only) and conventional calls as follows:

• To enable it on LTR-Net and LTR telephone and

auxiliary calls, check the “Conversation Enabled” box in the Edit > Mobile Radi o Pa rame ter s > Basic Parameters screen.

• To enable it on conventional calls, check the

“Conventional Enabled” box in the same screen.

The proceed tone normally sounds almost immediately when the PTT switch is pressed. However, with some calls, such as wide area, the user should wait a short time after pressin g the PTT switch before speaking. The proceed t one del ay of 0- 2.5 secon ds can be programmed in the Ti ming Par amet er s scr ee n. This delay can then be enabled on each group by checking the “Delayed Proceed Tone” box. If this box is not checked, no delay occurs.

On LTR-Net and LTR systems, if the radio system is busy when making a call, the busy tone sounds instead of the proceed tone and “BUSY” is indicated i n the display. If an access attempt is u nsuccessful, such as because of an out-of-range condition, the intercept tone sounds and “NO ACESS” is indicated in the display. Refer to Section 2.12 for more information on these conditions.

If the proceed tone is enabled on conventional systems and the Transmit Disable On Busy feature is used to automatica lly pe rform moni tori ng, the procee d tone does not sound if th e channel is busy (see Section

2.11.3). Otherwise, it sounds even if the channel is busy.

2.4.10 RECEIVE-ONLY GROUPS

Receive (monitor) only groups can be programmed in all operating modes so that transmitting is automatically disabled. To program receiveonly LTR-Net or LTR groups, program an encode ID of “Disabled”. To program receive-only conventional groups, on the group screen select Tx Option = Disabled. If the PTT switch is pressed with one of these groups selected, the intercept tone sounds and “TX DISB L ” i s d i splayed.

2.4.11 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 for longer than the programmed time, the transmitter is disabled, “TIMEOUT” is indica ted in the display and the intercept tone sounds. The timer and tone are reset by releasing the PTT switch.

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Table 2-1 Menu Mode and Option Switch Function s

Function Menu Item Option Switch See Description in Section:

Backlight mode select BACKLGHT 2.3.2 Bank select BANK SEL 2.4.1 Display mode S/G DISPL 2.3.4 Monitor mode X 2.11.2 Roaming on-off [3] ROAMING 2.9.4 Scan type select SCN TYPE 2.6.1 Scan continue on-off SCN CONT 2.6.9 Scan list save mode SCN SAVE 2.6.7 Tone type select TONES 2.4.12 Any Keypad Function [2]

NOTES:

1. Functions left blank are not available. [2] The option switches can also be programmed for any of the functions that are selectable by the keypad keys except 0-9. For example, scanning can be turned on and off by the FCN SCAN keys and by an op tion switch programmed for the Scan function (FCN does not need to b e press ed wh en using the opt ion switch). Pr ogrammabl e fun ctions includ e: FCN, Scan, SYS , RCL, GRP, CLR, Home, Phone, Dial, Page Menu, Squelch Adj., S.A/D, G.A/D, Send, Store, , , , , and Monitor. [3] Available with LTR-Net operation only.

One use of the time-out ti mer featur e is to preve nt a repeater from being kept busy fo r an extend ed period by an accid entally keyed transmitter. It can also prevent possible damage to the trans mitter cause d by transmitting for an excessively long period.

2.4.12 TONE SELECT

If the TONES menu parameter is selectable, the tones that sound can be selected. Otherwise, the tones that sound are fixed by programming. The following choices are available. Refer to Section 2.5.2 for more information on using the menu mode.

Silent - All tones are disabled. Keys - Only the key press tones are enabled. Alerts - All tones except the pre ceding key pre ss tones

are enabled.

All - Both the key press and alert tones are enabled.

2.5 OPTION SWITCHES AND MENU MODE

2.5.1 OPTION SWITCHES

The push-button switch on the top panel (see Section 2.2.1) and the two switches on the side panel immediately above and below the PTT switch (see

Section 2.2.2) are prog rammable. The f uncti ons whic h can be controlled by these switches are basically the functions that are selectable by the front panel keys plus monitor mode select (see “Option Switch” column in Table 2-1). This provides a way to “quick select” these functi ons. Functions may be controlled by both the option switch and the keypad key, and some or all option switches can be disabled if desired.

2.5.2 MENU MODE

Introduction

The menu mode is selected by pressing FCN MENU. Functions which can be cont rolled by the menu mode are indicated in Table 2-1 by an entry in the “Menu Items” column. More information on each function can be found in the section indicated in this table. Other menu mode information is as follows:

• Programming determines which parameters are

displayed in the menu mode . Some functions can be controlled by both an option switch and the menu mode if desired.

• Some functions can be set in a fixed condition by

not enabling the menu parameter or a n option switch

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and then programming a default condition in the menu mode programming screen. However, if a parameter can be changed by an option switch or menu parameter, the default condition is maintained only until the fir st time it is changed (cyc ling power does not reselect the default condition).

• Calls cannot be received or transmitted while the

menu mode is selected.

Menu Mode Flowchart

Using Menu Mode

Proceed as follows to select functions using the menu mode. A flowchart of the menu mode is shown above.

1. Select the menu mode by pressing FCN MENU. The

first menu parameter is then displayed.

2. To scroll through the available menu parameters,

press the (scroll down) and (scroll up) keys.

3. To display the option that is currently selected for

the parameter, press the STR key.

4. To change the selected option, press the and

keys.

5. To exit back to the parameter and save the selected

option, press STR again.

6. When the desired condition of each menu para meter

is selected, exit the menu mode by pressing FCN MENU again. The menu mode is also a utomatically

exited 2 seconds after a chang e is made or 8 seconds after no changes are made.

2.6 SYSTEM AND GROUP SCANNING

2.6.1 GENERAL

Introduction

The scan feature monitors, in sequence, the systems and/or groups in the scan list. When a message is det ected t hat the t ranscei ver is programmed to receive, scanning st ops and the messa ge is r eceive d. Shortly after the message is complete, scanning resumes (unless it has been disabled). System and group scanning or group scanning only may be selected, and they operate as follow s. Refer to Section

2.3.12 for more information on systems and groups.

System Scanning

- Detects calls on all systems in the system scan list (see Section 2.6.8). If system scanning is not used, calls are detected on only the currently selected system.

Group Scanning

- Detects calls on all groups in the group scan list. These groups are from the selected system and also from scanned systems if system scanning. If group scanning is not used, calls are detected on only the selected group and higher priority LTR-Net and LTR groups (see Section

2.8.2).

2.6.2 SCAN ON-OFF

System and/or group scanning are turned on and off by pressing FCN SCAN. When either type of scanning is enabled, is indicated in the display as shown in the following illustration. Then when system scanning is actually occurring with the numeric

Enter/Exit

Menu Mode

Press FCN MENU

BANK

SEL

Other Menu

Parameters

PARAMETERS

PARAMETER

OPTIONS

STR

Bank 1

Bank 2

Bank x

Select by

Press

pressing

System Scan List Group Scan Lis

System or Group

Scanning Selected

Group Scannin

Occurring

System Scanning

Occurring

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display mode selected, the system number is replaced by dashes and likewise for the group number when group scanning is occurring.

When the alpha tag display mode is selected, group scanning is indicated by “GRP SCAN” in the display, and system scanning is indicated by “SYS SCAN”. The monitor mode must be disabled for scanning to occur (see Section 2.11.2).

2.6.3 SCAN TYPES

The type of scanning selected is determined by the menu mode SCN TYPE parameter (see Section

2.5.2). If this par ameter is not selectable, the scan type is fixed by programming. The available scan types are as follows.

SYSTEMS - Both system and group scanning GROUPS - Group scanning only OFF - Both types disabled (scanni ng not selecta ble)

If the SCN TYPE menu parameter i s disable d, the programmed default scan type is always selected. The selected system and group can be changed while scanning using the SYS and GRP keys in the normal manner. Scanning resumes shortly after the change is made.

When a call is received in the scan mode, the display 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 th e selecte d system/gr oup. Refer to Section 2.6.10 for more information.

2.6.4 LTR-NET MODE SCANNING

If an LTR-Net system is selected and both roaming and system scan ar e enabled, registration on other localities can occur and the only systems scanned ar e LTR-Net systems that are in the scan list and programmed for the current locality.

However, i f no LTR-Net locality could be l ocated during locality search, LTR and conventional systems that are in the scan list are also scanned. If a signal is detected on one of those systems, the transceiver moves to it. However, searching continues for a programmed LTR-Net locality, and when one is

detected, registra tion on that site occurs and only LTRNet systems are again scanned. This operation can provide uninterrupted operation when traveling through areas which have not yet been converted to LTR-Net operation.

Other scan o peration in this mode is as follows:

• If Roaming = Off and System Scan = On with an

L TR-Net system selected, LTR-Net systems that are in the scan list and programmed for the current locality are scanned and LTR and conventional systems are never scanned.

• If Roaming = On and System Scan = Off with an

LTR-Net system selected, registration on other LTR-Net sites can occur, but no other systems are scanned. If an LTR or conventional system is selected, roaming is di sabled.

• If Roaming and System Scan = On with an LTR or

conventional system selected, only L TR-Net or LTR and conventional system types are scanned as described previously.

• If Roaming = Off and System Scan = On with an

LTR or conventional system selec ted, on ly the LTR and conventional systems in the scan list are scanned.

2.6.5 LTR MODE SCANNING

When scanning with an LTR system selected and roaming disabled, only LTR and conventional systems in the scan list are scanned. LTR-Net systems are not scanned. If roaming is enabled, only LTR- Net s ystems are scanned if an LTR-Net locality is de tected as described in the precedi ng section.

When LTR systems are scanned, the home repeater of each LTR system in the scan list is scanned. Scanning is sequential through all systems in the scan list. If several systems are programmed with the same LTR locality and home channel, channel selection occurs only once. Therefore, there is no delay to change channels which results in very efficient scanning. E ach home re peater i s scanned for only as long as necessary to detect all calls. Priority calls are also detected on LTR systems while scanning (see Section 2.8.2).

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2.6.6 CONVENTIONAL MODE SCANNING

As with LTR mode scanning, if a conventional system is selected with roaming disabled, only conventional and LTR systems in the scan list are scanned. LTR-Net systems are not scanned. If roaming is enabled, only LTR-Net systems are scanned if an LTR-Net locality is detected (see Section 2.6.4).

Each conventional s ystem sele cts a ra dio channel , each system is scanned in order. Call Guard squelch is detected if the monitor mode is disabled (see Section

2.11.2). If the mon i tor mode is enabled, all ca lls occurring on the channel are received.

A feature called Adaptive Tone Scan (ATS) is used when scanning conventional channels. If no carrier is detected, the channel is scanned for only 40 ms. If a carrier is detected, searching for Call Guard signaling occurs (if programmed). If the tone type of Call Guard squelch is pr ogrammed, the channel is monitored for 180-420 ms. The shorter time is when the tone is outside certain limits, and the longer time is if it is at or near the programmed valu e. If digital type is programmed, approximately 350 ms is required to determine an invalid code (less time is usually required to detect valid codes).

2.6.7 SCAN LIST PROGRAMMING

General

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

NOTE: Deleting LTR-Net sys tems from the scan lis t also deletes them from locality searching when roaming, even if scanning is disabled (see Section

2.9.4).

The scan list status of the displayed system is changed by pressing FCN S.A/D, and the scan list status of the displayed group is changed by pressing FCN G.A/D . The displ ayed system is in the scan list and scanned normally when is displayed, and the displayed group is scanned when is displayed (see illustration in Section 2.6.2).

Deleting a system only temporarily deletes the groups associated with that system because when a system is added back into the scan list, the original group scan list is again active. Scan lists can be programmed even when scanning is disabled and while listening to a message. If a system or group is deleted while listening to a message, scanning resumes after the rec eive delay time expires (if applicable).

2.6.8 SAVING SCAN LIST

If the menu mode SCN SAVE p arameter is enabled (see Section 2.5.2), the user can select if scan list changes are saved or not sa ved. If “On” is sel ected, changes are saved as th ey are made and the scan list does not change when power is turned of f. Conver sely, if “Off” is sele cted, they ar e 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 the default mode selected by programming.

2.6.9 SCAN DELAY AND CONTINUE TIMERS

Receive Delay

When a message is received whi le scanning, the re is a programmable delay of 0-7 seconds before scanning resumes. This delay is called the Receive Delay Time, and it pr events scanning from resuming

or a message on some other system or group from being received before a response can be made

. This delay is also in effect if a control is changed while scanning such as selecting another system/group. This timer is reset each time another call is received.

NOTE: Scanning does not resume if it is disabled, such as by selecting the monitor mode.

Call Delay Time

The receive delay time c ontrols the scan delay until the tra nsmitter is keyed and then the Call Delay Time controls the delay. This time is programmable for 0-7 seconds, and it ensures that a response to your message is heard inst ead of some other message occurring on another system/group. The Call Delay Timer remains active for the remainder of the conversation, and controls when normal scanning resumes, even if additional responses are received.

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Scan Continue Timer

The scan continue time r controls the maximum time that a c all is received before scanning resu mes. This prevents scanning from being delayed for long periods by lengthy calls. This ti me can be programmed for 0-60 seconds in 1-second steps. If “0” is programmed, there is no time limit and the entire message is always recei ved. If the SCN CONT menu parameter is available (see Section 2.5.2), this feature can be turned on and off by the user.

2.6.10 TRANSMITTING IN THE SCAN MODE

When messages are received while scanning, the programming of the “Scan Revert Mode” parameter determines if the selected system/group does not change or changes permanently or temporarily to the new system/group. This in turn affects the system/ group on which responses occur. The display always indicates the system/group on which a call is being received, but this may not be the system/group on which a response occurs (s ee mode des cript ions whi ch follow).

When an LTR-Net/LTR priority call is received (see Section 2.8.2), the sc an revert mode pr ogramming also determines if the selected group changes and if a response occurs on the displayed or selected group, even if scanning is disabled. The three programmable scan revert mode configurations operate as follows:

Last Selected - Transmissions always occur on the system/group that was selected manually by the SYS and GRP keys or automatically by roaming. The refore, if a message is received when scanning that is not on the selected system/group, a response occurs on the selected system/group, not the system/group of the call. To respond to this type of call, select the system/ group of the call as follows:

• Select it manually using the SYS and GRP keys.

• Before scanning resumes, exit the scan mode by

pressing FCN SCAN. The system/group of the call then becomes the se lected system/gro up and it is not necessary to change it manually.

Last Received - The sele cted syst em/group ch anges 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 selec ted system/group, it must be manually selected using the SYS and GRP keys or FCN HOME if it was the home system/group.

Temporary Last Received - The system/group changes to th e system/group of a call for only the duration of the receive delay period described in Section 2.6.9. Then when the delay expires and scanning resumes (if it is not disabled), transmissions occur on the selected system/group. Therefore, you can respond to a call without changing the sele cted system/group as long as you do so before scanning resumes.

2.7 DIAL MODE

2.7.1 INTRODUCTION

When placing calls that require dialing a number (telephone and auxiliary), using the dial mode provides the following features which make placing these calls more convenient:

• The eight-character alphanumeric display i s cleared

so that the dialed num ber can be displayed.

• Numbers can be entered at any convenient rate,

dialing errors corrected, and then the number automatically transmitted when desired.

• Up to ten 16-digit numbers can be stored in memory

and later recalled.

• System and group scan are disab led. Therefore, calls

are received on only the selected system/group and also on any higher priority groups if applicable.

• The SYS and GRP keys become RCL (Recall) and

CLR (Clear) keys. Therefore, the selected system and group cannot be changed with the dial mode selected.

Telephone and Auxiliary calls can also be placed without selecting the dial mode. However, the dialed number does not appear in the display and therefore cannot be stored or recalled. A number is manually transmitted as follows:

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1. Access the radio s ystem by bri efly pressin g the PTT switch.

2. When a dial tone is heard, dial the desired number while pressing the PTT switch. If to o much time elapses between digits, the call terminates. Release the PTT switch and wait for a response.

NOTE: When receiving telephone and other types of calls, selection of the dial mode is optional because it does not enhance operation.

2.7.2 SELECTING DIAL MODE

Selecting Dial Mode and Telephone Group - To select the dial mode and a telephone group in the current system, press FCN PHONE. If there is more than one group programmed for telephone calls in the current system, the first higher numbered telephone group is selected. If there is no telephone group or a conventional system is selected, “NO PHONE” is displayed and an error tone sounds.

Selecting Dial Mode Only

- To select the dial mode without changing the currently selected group, press FCN DIAL. This method should probably be used when placing auxiliary calls because the auxiliary call group must be selected, not a telephone group.

The dial mode is indicated when the handset portion of the telephone icon is displayed, and a telephone group i s indica te d when t he base port ion is displayed. Selecting the dial mode using FCN PHONE displays both icons. When an auxiliary call group is selected, “

UID” is displayed.

2.7.3 DIALING A NUMBER

Enter the desired number by pressing the 0-9, , and keys. Other dialing functions are as follows:

• Only the last eight digits dialed are displayed. To

momentarily display the upper eight digits, press FCN .

• To erase the last digit, press the CLR key. To erase

the entire number, press FCN CLR.

• To ente r a pause, press FCN (each pause equals

one character).

2.7.4 SENDING THE NUMBER

Access the radio system by briefly pressing the PTT switch. Then when a dial tone is heard, send the number in the display by pressing FCN SND. The keypad remains acti ve while i n a convers ation to allow additional numbers to be dial ed. Si mp ly pr ess the PTT switch and dial the number. The number in the display does not change when a number is dialed in this manner.

The main difference in operation between LTRNet/LTR and conventional systems is when the telephone number is sent (see following).

When an LTR-Net or LTR system is selected, the PTT switch is briefly pressed to initiate a system access. Then if the access is successful, the dial tone sounds and the number can be sent.

When a conventional system is selected, the telephone number can be se nt at a ny ti me if a carri er is not being dete cted on the ch annel. If a ca rrier is dete cted, the number is sent only if the monitor mode is active. This ensures that the cha nnel is monitored.

2.7.5 STORING NUMBERS IN MEMORY

Up to ten 16-digit numbers can be stored in memory and later recalled. Proceed as follows:

1. Enter the number as described in the preceding

“Dialing a Number” section.

2. To store the number, press FCN STR and the

memory location from 0-9.

3. If there is already a number in the selec ted locat ion,

it is replaced by t he new number . To clear a memory location, simply store a blank display.

4. If an att em pt is made to store a number in a locked

position, “NOT AUTH” is displayed.

NOTE: The character is stored and sent normally (no pause occurs unless it is preceded by FCN), and the character should not be stored because it may terminate the call when it is sent.

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2.7.6 RECALLING NUMBERS FROM MEMORY

From Specific Location - FCN RCL 0-9 (location number)

Stored in Next Loca tion

- When a number is recalle d as just described, the number in the next location can be displayed by simply pres sing RCL.

Last Number Recalled from Memory

- FCN RCL

Last Number Sent by FCN SND

- FCN RCL

2.7.7 EXITING DIAL MODE

The dial mode is automatically exited when power is cycled or approximately 60 seconds aft er no keys are pressed. It can also be exited as follows:

Exiting W ithout Sen ding Call Termination Characters

Press FCN DIAL. The call termination characters should then be sent manually before exiting (see following).

Exiting and Automatically Sending Call Termination Characters - Press FCN PHONE and the call termination characters ( ) are automatically sent to indicate to the base equipment that the call is complete. Three beeps sound when the call is successfully terminated.

If the call is not terminat ed in this manner, the repeater be ing used is held until the en d of the call is detected automatically, such as by the absence of voice. This occurs because with telephone and auxiliary calls, the repeater is held for the duration of the call instead of jus t for th e durat ion of a tra nsmissi on as with standard group calls.

2.8 LTR-NET AND LTR FEATURES

2.8.1 STANDARD GROUP CALLS

Standard group (dispatch) calls ar e between mobiles or groups of mobiles using the standar d group ID codes from 1-239 (LTR-Net) or 1-250 (LTR) that are assignable to each home repeater. LTR-Net and LTR standard calls are very similar and are placed and received using the same procedure. Simply select a group programmed with the ID code of the mobile being called and then press the P TT swi tch. No number is dialed to place this type of call.

To receive a standard group call, the group programmed with the ID code being transmitted must be selected or scanned. Calls with a higher priority than the selected group are always received as described in Section 2.8.2. The procedure used to place and receive standard group calls is described in Section 2.3.13.

2.8.2 CALLS ON PRIORITY ID CODES

LTR-Net transceivers use a different receive priority scheme than has been used with other E.F. Johnson transceivers. Instead of programming each selectable system with one or two fix ed priority ID codes, each group is assigned a priority number which determines if a call on that group can interrupt a call on another group in that system. The following priority information is programmed for each LTR-Net and LTR group:

• Priority number from 1-8.

• Interruptible or not interruptible.

The highest priority is programmed by “1” and the lowest priority by “8”. When any priority 1 group in the current system is displayed, is indicated in the upper part of the display, and when any priority 2 group is displayed, is indicated. Prior ity 3- 8 group s are not indicated.

If any type of call (standard, telephone, auxiliary) is detected on any group of the selected system that has a higher priorit y than the select ed group or the call being received, it is received even if group scanning is not enabled. Exceptions are if the group is not in the group scan list or the current call is on a group programmed as not interruptible.

Standard group calls with a lower priori ty than the selected group are received only if group scanning is enabled. Telephone and auxiliary calls of any priority are always received if they are on a group in the group scan list and no other call is being received. If another call is b eing recei ved, they are received on ly if they have a higher priority than the current ca ll.

If calls on certain g rou ps ar e not to be i nterrupted by higher priority calls, the group can be programmed as not interruptible (telephone and auxiliary calls are never interrupted by other calls). For example, if calls on a certain group are not to be interrupted, that group

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can be programmed as not interruptible. This has the same affect as programming it with a “1” priority. However, if this was done instead of programming it as not interrupti ble, call s on t hat gr oup woul d int errupt all other lower priority calls which may not be desirable.

The transc eiver displ ays the system and group of the priority call while it is being received. The programming of the “Scan Revert Mode” parameter (see Section 2.6.10) determines if the change to the priority group is te mporary or permanent and if a transmission occurs on the priority group.

With LTR-Net operation, in coming call information is received on the repeater to which a mobile is trunked as well as the home and status repeaters. Therefore, priority calls are detected when the transceiver is trunked to other repeaters.

With LTR operation, incoming call information is received on only th e home repea ter. Therefore, priority calls are not detect ed while trunked to some other repeater. To reach most mobiles with a priori ty message in this case, the operator can key the transmitter and then not begin speaking for seve ral seconds. This allows trunked-out mobiles time to finish the transmission and return to the home repeater.

This operation still may not reach mobiles making telephone calls because they hold a repeater for the duration of a conversation (instead of the duration of the transmission as with dispatch calls). Other times when priority calls could be missed with both types of operation are when transmitting and when some other system not programmed with the priority ID is being m onitored.

2.8.3 BLOCK ID CODES AND ACCESS

PRIORITY

This transceiver does not use blocks of ID codes. However, with up to 99 groups programmable per system and group scanning, it is usually possible to program the transceiver to receive all desired calls.

Access priority to contr ol which transceivers can access the system during busy periods is not available with this transceiver (all transceivers have equal

access). The preceding section describes receive priority which cont rols what calls are received.

2.8.4 TRANSMIT INHIBIT

The Transmit Inhibit feature prevents the transmitter from keying if the mobile being called is busy with a call not programmed for any group position. When the transmitter is disabled by this feature, the intercept tone sounds and “TX INHIB” is displayed (see following illustration).

This feature is enabled by pro gra mming LTR-Net and LTR systems with a block of transmit inhibit ID codes that can include all 239 or 250. If a code within this block is detected up to 5 seconds before the PTT switch is pressed, the transmitter is disabled as just described. Even though the 5-second timer counts down while the PTT switch is pressed, it is not possible to access the system without first releasing the PTT switch. A simil ar Transmit Disable On Busy feature is available on conventional systems (see Section 2.1 1.3) .

2.9 LTR-NET FEATURES

NOTE: Other LTR-Net features are described in Section 2.8.

2.9.1 LTR-NET STANDARD CALLS

Refer to Section 2.8.1 for informatio n on these calls.

2.9.2 LTR-NET SPECIAL CALLS

Introduction

The LTR-Net special calls ori ginated by the mobile include Telephone and Auxiliary as shown above. Most other special calls such as Interrogate,

Special

Telephone Auxiliary

Directed Group

Unique ID

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E.F. Johnson LTR-Net 7243, LTR-Net 7200 Series Service Manual

Specifications and Main Features

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User Manual