Ericsson ORION, ORION LBI-38903A Maintenance Manual

LBI-38903B

Maintenance Manual

ORION

136-174 MHz
SCAN AND SYSTEM
MOBILE RADIO

TABLE OF CONTENTS

Synthesizer/Receiver/Exciter . . . . . . . LBI-38910

Power Amplifier . . . . . . . . . . . . . . LBI-39002

PA Interface . . . . . . . . . . . . . . . . LBI-38994

Control Logic/IF Board . . . . . . . . . . LBI-39003

Control Units . . . . . . . . . . . . . . . LBI-38992

Assemblies . . . . . . . . . . . . . . . . LBI-38909

Service Section . . . . . . . . . . . . . . LBI-38993

ericssonz

Ericsson Inc.

Private Radio Systems
Mountain View Road
Lynchbur g, Virginia 24502
1-800-528-7711 (outside USA, 804-528-7711) Printed in U.S.A.

Copyright© October 1993 Ericsson GE Mobile Communications Inc.

Continued

TABLE OF CONTENTS

Page

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SYNTHESIZER/INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

TRANSMITTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

LOGIC FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SYSTEM INTERCONNECTION DIAGRAMS:

U.S.A. LOW POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

U.S.A. HIGH POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

EUROPEAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ILLUSTRATION

Figure 1 - ORION Mobile Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

SPECIFICATIONS*

Frequency Range: 136-153 MHz

150-174 MHz

Battery Drain:

Receiver Squelched 1.1 Amperes at 13.8 V olts

Unsquelched 3.0 Amperes at 13.8 Volts (15 Watts Output)

Transmitter 25 Watts 12 Amperes at 13.2 V olts

50 Watts 14 Amperes at 13.6 Volts

110 Watts 28 Amperes at 13.4 Vol ts
Frequency Stability: 0.0002% depending on model
Temperature Range: -30° C (-22° F) to +60° C (+140° F)
Duty Cycle: 100% Receive, 14% Transmit
Transmitter

Transmit Output Powe r: 25W/50W/110W

Conducted Spurious:

-85 dB

Modulation:

±

5 kHz

Audio Sensitivity: 55 to 110 millivolts

Audio Frequency Characteristics: Within +1 dB to -3 dB of a 6 dB/octave pre-emphasis 300

Hz and within +1 dB to -4.5 dB (+1 to -3 dB for Euro) of a
6 dB/octave pre-emphasis 3000 Hz per EIA standards.
Post-limiter filter per FCC and EIA.

Distortion: Less than 2% (1000 Hz)

Deviation Symmetry: 0.3 kHz maximum

Maximum Frequency Separation: 136-153 MHz, 17 MHz

150-174 MHz 24 MHz

Microphone Load Impedance: 600 Ohms

Power Adjust Range:

100% to 50% of rated power (U.S.A. Model s )
100% to 24% of rated power (Euro Mod e l s )

RF Output Impedance: 50 Ohms

FM Noise: 50 dB

Receiver

Audio Output: 15 Watts with less than 3% distortion
(To 4.0 ohm speaker)

Sensitivity: 0.35 µV (STD)
12 dB SINAD (IEIA method)

Selectivity:
EIA Two-Signal Method
(25 kHz Channels)

95 dB (STD)

This manual is published by

Ericsson Inc.,

without any warranty. Improvements and changes to this manual necessitated by

typographical errors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by

Ericsson Inc.,

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

Ericsson Inc.

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

NOTICE!

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

NOTICE!

This manual covers Ericsson and General Electric products manufactured and sold by Ericsson Inc.

NOTICE!

LBI-38903

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