3 IQ Analyzer (Basic) Mode
3.1 Complex Spectrum Measurement
Peak Search
Moves the selected marker to the trace point that has the maximum Y-Axis value for
that marker’s trace.
NOTE
Pressing the Peak Search hardkey automatically moves you to the Peak Search
page of the Marker menu
and
performs a peak search.
The "Pk Search Config" on page 214 menu enables you to define specific search
criteria to determine which signals can be considered peaks, excluding unwanted
signals from the search.
See "More Information" on page 209.
Remote
Command
Complex Spectrum:
:CALCulate:SPECtrum:MARKer[1]|2|…|12:MAXimum
Streaming:
:CALCulate:STReaming:MARKer[1]|2|…|12:MAXimum
Example
:CALC:SPEC:MARK2:MAX
:SYST:ERR?
can be used to query the errors to determine if a peak is found. The message “No peak found” will be
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 "Pk Search Config" on
page 214 tab. If Use Excursion and Threshold is selected, 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 (except that 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’s
mode to be set to POSition 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 access 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 displays without performing a peak search.
209 IQ Analyzer Mode User's &Programmer's Reference
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