3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
:CALC:MARK2:X?
:SYST:ERR?
can be used to query the errors to determine if a peak is found. The message “No peak found” is
returned after an unsuccessful search
Notes Sending this command selects the subopcoded marker
More Information
The behavior of Peak Search depends on settings under the Peak Search Config tab.
If the setting of Peak Search Mode is Use Excursion and Threshold, and either Pk
Excursion or Pk Threshold are on, a signal must meet those criteria to be considered
a peak. If no valid peak is found, a “No peak found” message is generated, and the
marker is not moved.. When Highest Peak is on, or both Pk Excursion and Pk
Threshold are off, the marker is always placed at the point on the trace with the
maximum y-axis value, even if that point is on the very edge of the trace (exception:
negative frequencies and signals close to the LO are not searched at all).
Pressing Peak Search with the selected marker Off causes the selected marker to be
set to Normal at the center of the screen, then a peak search is immediately
performed.
Pressing the front panel Peak Search key always does a peak search. Occasionally,
you may need to get to the Peak Search menu key functions without doing a peak
search. You can do this by first accessing the Marker menu, then pressing the Peak
Search tab. The Peak Search menu appears without performing a Peak Search.
Peak Search All Traces
In the Spectrogram View, when Peak Search All Traces is pressed, a Peak Search is
executed that finds the highest point on all of the drawn traces in the Spectrogram
window. The marker moves there, and the Display Trace changes to the trace on
which the peak was found.
This function obeys the criteria in the Pk Search Config menu in the same way that
the normal Peak Search function does.
Remote Command
:CALCulate:MARKer[1]|2|…|24:MAXimum:ALL
Example
:CALC:MARK2:MAX:ALL
:SYST:ERR?
can be used to query the errors to determine if a peak is found. The message “No peak found” is
returned after an unsuccessful search
Notes Sending this command selects the subopcoded marker
Dependencies Only appears in the Spectrogram View. If sent outside of Spectrogram, generates an error
Spectrum Analyzer Mode User's &Programmer's Reference 321
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