MAINTENANCE
RESE'I"l‘ING THE RECEIVER MEMORY
You may occasionally need to reset random access memory (RAM) in the receiver for one of the
following reasons:
You wish to verify that two·way communication is taking place.
You may suspect that RAM is corrupted.
A cold start reset procedure erases the almanac, forcing all software settings to their default values.
There will be a 15 minute delay before complete normal operation resumes, just as when the backup
battery fails or when the circuit cards are separated from the chassis. For this reason, you may wish
to try a warm start, or a tepid start before trying a cold start. Neither the warm start nor the tepid
start will erase the almanac.
PROCEDURE
Follow the initialization steps in the Magnavox DGPS 12 Channel Operator’s Manual to execute the
Magnavox CDU program. Continue with these instructions after communications have been
established between the PC and the receiver.
1. If the Main Menu is not presently displayed press the ESC key. Use the tab key to
highlight the PC Modem Control field.
2. Select the PC MODEM CONTROL Menu with the enter key.
3. Key in the string: $PMVXG,018,* (must be all upper case characters) where "" is
W = Warm Start; saves the old almanac and re-acquires the satellites.
T = Tepid Start; saves the almanac but erases all other parameters.
C = Cold Start; erases the almanac and starts from the beginning. Re-
acquires almanac in about 15 minutes.
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