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Chapter 4 121
Making Measurements
Making the Waveform (Time Domain) Measurement
NOTE In the Waveform measurement, the Mean Pwr (Entire Trace) value
plus the
Pk-to-Mean value will sum to equal the current Max Pt. value
as shown in the data window below the RF Envelope display. If you do a
marker peak search (
Search) with averaging turned off, the marker will
find the same maximum point. However, if you turn averaging on, the
Pk-to-Mean value will use the highest peak found for any acquisition
during averaging, while the marker peak will look for the peak of the
display, which is the result of n-averages. This will usually result in
differing values for the maximum point.
Troubleshooting Hints
Changes made to advanced waveform settings can inadvertently result
in measurements that are invalid and cause error messages to appear.
Care needs to be taken when using advanced features, as some settings
may incorrectly appear to provide a valid result. Press
Meas Setup, More,
Restore Meas Defaults to return measurement settings to a known state,
then vary settings only as necessary.