Agilent Technologies E4440A, E4440-90189, E4443A, E4445A, E4446A, E4448A 4.1 Peak Search

Chapter 4 209

Instrument Functions: P - Z

Peak Search

Instrument Functions: P - Z

4.1 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 215.) 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.

NOTE 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).PressReturn 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 218.

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 177.

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 177.

Places the marker on the next highest peak with an amplitude less than the current peak.

The peak must meet the defined peak excursion and threshold values. Peaks that are less

than 1% of the current span away from 0 Hz are ignored. If no valid peak is found, an error

(No Peak Found)isdisplayed.PressESC to clear this message before attempting another

search. (Also see the Peak Excursn and Pk Threshold key descriptions.)

Key Path: Peak Search

State Saved: Not part of saved state.