Technical data

429
User’s and SCPI Programming Guide
Agilent Technologies
18
Peak Search
Places a marker on the highest peak and displays the search menu. If Peak Search Type
(Param) is set to Excursion & Threshold, the peak found must meet the defined peak
excursion and threshold values. (See “Search Param" on page 437.) Peaks that are less
than 1% of the current span away from 0 Hz are ignored. For example, if Span is 1 MHz,
peaks will not be found between –10 kHz and +10 kHz. If no valid peak is found, an error (No
Peak Found) is displayed. To clear this message, press ESC before attempting another
search.
The peak search parameters are Peak Threshold and Peak Excursion. All searches except
Peak Search (Next Peak, Next Left, Next Right, Peak Table, SCPI “PEAKS” command) obey
the Search Parameters, which means that only peaks which rise above the Peak Threshold
by at least the Peak Excursion are found. Peak Search obeys then when Peak Search is in
PARAM mode. When the Peak Search key is in MAX mode, the search parameters are
ignored for a Peak Search.
You can go into the Peak Search menu without actually performing a Peak Search by using
the front-panel Return key (assuming you have previously accessed the Peak Search
menu). Press Return to navigate through the previously accessed menus until you return to
the Peak Search menu.
Remote Command:
:CALCulate:MARKer[1]|2|3|4:MAXimum
Remote Command Notes: The :CALC:MARK:PEAK:SEARC:MODE MAX|PAR
command specifies how a peak is identified for use with the marker commands. See “Peak
Search" on page 439.
Example:
CALC:MARK2:MAX performs a peak search using marker 2.
CALC:MARK2:Y? queries the marker amplitude (Y-axis) value for marker 2. For more
information on this command, see “Marker" on page 203.
CALC:MARK2:X? queries the marker frequency or time (X-axis) value for marker 2. For
more information on this command, see “Marker" on page 203.