Agilent Technologies 8648A Operation And Service Manual page 233

5c
Service Error Messages
This chapter describes service error messages. Front panel and GPIB operation messages
are covered in Chapter 1c, "Operation Messages".
502
Updated cal file
Description The RAM calibration file has been updated from the calibration ROM.
Cause This is normal when a module is replaced.
What To Do This message requires no action.
503
Cal corrupt: restored
Description After detecting a failure in comparing calibration data between RAM and
the calibration ROM, a data restore was done.
What To Do This message requires no action.
504
Modulation cal restore failure
Description After detecting a failure comparing calibration data between RAM and the
calibration ROM, a data restore was attempted unsuccessfully.
Cause There is either a failure in writing data to RAM or in reading data from
the calibration ROM.
What To Do Replace the A3 assembly. Both the calibration ROM and RAM are on the
A3 assembly.
505
FM sense cal restore failure
Description After detecting a failure in comparing calibration data between RAM and
the calibration ROM, a data restore was attempted unsuccessfully.
Cause There is either a failure in writing data to RAM or in reading data from
the calibration ROM.
What To Do The calibration ROM can be verified by replacing the A5 assembly. The
calibration ROM is contained in the assembly.
If the failure is still present after replacing the A5 assembly, replace the
A3 assembly, which contains the RAM.
5c-1