Installation Note E8251-90396 5
Safety Considerations
WARNING Before you disassemble the signal generator, turn the power switch off and
unplug the power cord. Failure to unplug the signal generator can result in
personal injury.
CAUTION Electrostatic discharge (ESD) can damage or destroy electronic components.
All work on electronic assemblies should be performed at a static-safe
workstation.
Check Signal Generator Functionality
Use the following procedure to confirm that the signal generator powers up and the internal
check identifies no errors. The internal check evaluates the operation of the signal generator
and returns an error message if it detects a problem.
NOTE When the signal generator is first connected to ac line power, the error
message ERROR 514, Reference Oven Cold occurs, which causes both
the OVEN COLD annunciator and the ERR annunciator to turn on.
After approximately five minutes, the OVEN COLD annunciator automatically
clears, but the ERR annunciator remains on until all errors are cleared from
the error queue.
1. Turn on the signal generator and let it warm up for at least five minutes.
2. Run the signal generator self-test by pressing
Utility > Instrument Info/Help Mode > Self Test
> Run Complete Self Test
. Upon completion, a summary of the self-test will be displayed.
Use the E8257D/67D, E8663D PSG Service Guide, E8251-90359, to troubleshoot any
failures detected by the test.
NOTE Some circuits may require up to 50 minutes to warm up before passing the
self-test. If self-tests continue to fail after 50 minutes of warm up,
troubleshoot the instrument.
3. Check to see if the ERR annunciator is on.
• If the ERR annunciator is on, review the error messages in the error queue by pressing
Utility > Error Info
. The first page of error messages in the error queue appears in the
display text area. (Refer to the signal generator error messages document for
information about each error message.)
After resolving all problems causing errors, press
Clear Error Queue(s)
.
• If the ERR annunciator is off, the signal generator functionality check has passed.
