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Description, Initial measurements – Ericsson LBI-39175A User Manual

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LBI-39175A

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DESCRIPTION

This section contains the information required to

service the ORION VHF Dual Bandwidth two-way FM
radio. Included are disassembly procedures, alignment
procedures, and troubleshooting information (see Table of
Contents).

This radio is adjusted by setting personality

parameters stored in the radio's computer memory.
Therefore, all radio alignment procedures require the use
of a Personal Computer (IBM PC or equivalent), along
with a Programming Interface TQ3370, and an ORION
PC Programming Cable TQ3377. PC Programming
Software Version 4.00 or later is also required.

This radio is designed to be serviced by

replacement of modules and/or circuit boards. As such,
there are very few serviceable component parts contained
on any of the circuit boards within the radio. Normally,
defective boards should be replaced, and returned to an
Authorized Service Center. Any serviceable parts are
listed in the troubleshooting guide for the individual
circuit boards.

INITIAL MEASUREMENTS

After the radio has been installed as described in

the Installation Manual, the following measurements
should be made by a certified electronics technician, and
recorded for future reference:

TRANSMITTER

RF Power into 50 ohm resistive load

Forward Power into antenna

Reflected Power from antenna

Carrier Frequency

Modulation Deviation

RECEIVER

12 dB SINAD Sensitivity from FM signal
generator

Copyright© December 1995, Ericsson Inc.