Anritsu 680XXC, Operation Manual, Page: 192 / 241

Chapter 6
Operator Maintenance
6-1
INTRODUCTION This chapter provides the information necessary for operator mainte-
nance of the signal generator. Operator maintenance is limited to
troubleshooting and repairs that can be made without removing the
instrument covers.
6-2
ERROR AND
WARNING/STATUS
MESSAGES During normal operation, the 681XXC generates error messages to in-
dicate internal malfunctions, abnormal signal generator operations, or
invalid signal inputs or data entries. It also displays warning mes-
sages to alert the operator to conditions that could result in inaccurate
signal generator output. In addition, status messages are displayed to
remind the operator of current menu selections or settings.
Self-Test
Error
Messages The 681XXC firmware includes internal diagnostics
that self-test the instrument. These self-test diag-
nostics perform a brief go/no-go test of most of the
instrument PCBs and other internal assemblies.
You can perform an instrument self-test at any time
during normal operation by pressing
SYSTEM and
then Selftest .
If the signal generator fails self-test, an error mes-
sage(s) is displayed on the front panel data display.
These error messages describe the malfunction and,
in most cases, provide an indication of what has
failed. Table 6-1, next page, is a summary listing of
the self-test error messages. Included for each is a
description of the probable cause(s), whether or not
the 681XXC is still operable, and if operable,what
operational degradation can be expected.
681XXC OM 6-3
During self-test with RF OUTPUT set to ON , the output
power level is set to 0 dBm. Always disconnect sensitive
equipment from the unit before performing self-test.
CAUTION