Other Problems; If A Test Fails In System Meas Mode; If Files Are Missing From A Ram Card - HP 8591C User Manual

Other Problems

This section lists problems that are not indicated by an error message.
If a test fails in
If a test fails in the SYSTEM MEAS mode, confirm the failure using
CHANNEL MEAS mode. This may involve disabling carriers or modulation
according to FCC rules. Relative measurements showing cable TV equipment
contributions may also be helpful in meeting FCC requirements.

If files are missing from a RAM card

A RAM card is able to store files because the RAM card's memory is refreshed
by a battery. The battery needs to be replaced periodically or the RAM card
can "forget" the files.
Check that the battery in a 128 kilobyte RAM card has been replaced
q
within the last year. Check that the battery in a 32 kilobyte RAM card has
been replaced within the 2 last years. (See the analyzer documentation
for information about the replacement date of the RAM card's battery.) If
the battery has not been replaced within the recommended time period,
change the battery.
To change the battery:
See the analyzer documentation for information about replacing the battery.
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