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Troubleshooting
This chapter provides basic troubleshooting tips that you can use if
the instrument is not performing as expected.
Instrument out of Specs
The specification is valid within +/- 10 degree Celsius after
running Selfcalibration. If the operating temperature changes, you
can run the SelfCal function. SelfCal is started by pressing the
SelfCal softkey on the Main page.
Outputs Disabled
The outputs are automatically turned off to protect the instrument
when they are not terminated correctly.
In the user interface, check the termination mode and voltage for
the output line in question, and make sure that the actual
termination matches this.
Unlock LED Lit
The Unlock LED lights up when an external clock source is used,
and the set frequency/period of the clock source does not match
the actual signal.
In this case, you can either enter the frequency of the clock source
manually, or press Measure to cause the instrument to measure
the frequency of the clock source.
Display is Black
If the display is black, but you are sure the instrument is running,
it is possible that the display was shut off remotely.
To reactivate the display, press any key. As a last resort, you can
power the instrument down and back up. Before you do this,
though, make sure that no one is carrying out remote tests using
the instrument.
Keysight 81133A/81134A Pulse Generator User's Guide, April 2015
89
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