450 Operation Manual Rev A Page 21 8/26/99
PROBLEM/SYMPTOM POSSIBLE CAUSE
LCD display shows: A checksum error was found
after reading the non-
NV Memory Error volatile memory device.
The unit may still be used
(press the Program/Execute
switch to proceed) but
should be returned for
repair as soon as convenient
since a power interruption
may cause loss of the unit's
programmed settings.
Receiver LCD display Receiver may be set to an
indicates a CXR alarm. incorrect frequency, or the
transmit site may not be
operating on the specified
frequency.
Receiver SQUELCH adjustment
may need to be changed.
(See Section 4-7)
The subcarrier transmitter
for the specified frequency
may not be operating, or may
be at a reduced carrier
level.
Receiver LCD display Any of the situations de-
indicates an AFC alarm. scribed above for a CXR
alarm may, under some con-
ditions, also cause an AFC
alarm.
The receiver may be tuned to
a wide deviation channel
which it is unable to track.
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