2-46
Making Measurements
Advanced Features
12 Some measurement results may be displayed as ---- due, for example, to
mobile failure. The measurement has been armed but has not completed. In these
circumstances a GPIB query of the measurement will not return a result. This
event should be catered for by adding a time-out to the query and a “CLEAR”
operation as described in paragraph 11, above.
13 When changing between screens, the DSP results may briefly show a very large
number. This is expected behavior.
When controlling the instrument via GPIB, some phase and frequency results
may consistently return a very large number. This is most likely caused by
attempting to read result from another DSP screen when measurement triggering
is set to Continuous. The alternative solutions are either to change to the
appropriate DSP screen before reading the result, or to use single-shot
measurement triggering.
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