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BI-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.