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3 Spectrum Analyzer Mode

3.2 Swept SA Measurement

When Continuous Peak Search is turned on for a marker, a small “hat” is placed

above the marker.

3.2.7.4 Pk Search Config

Contains controls that allow you to setup the Peak Search functions.

Since the Pk Search Config functions are independent of the selected Marker, the

Select Marker control does not display while in Pk Search Config.

Peak Threshold

Turns the peak threshold requirement on/off and sets the threshold value. The peak

threshold value defines the minimum signal level (or min threshold) that the peak

identification algorithm uses to recognize a peak.

When both "Peak Excursion" on page 327 and "Peak Threshold" on page 326 are ON,

a signal must rise above the Peak Threshold value by at least the Peak Excursion

value and then fall back from its local maximum by at least the Peak Excursion value

to be considered a peak.

For example, if a threshold value of –90 dBm is selected, the peak search algorithm

will only consider signals with amplitude greater than the –90 dBm threshold. If a

threshold value of –90 dBm is selected, and Peak Excursion is ON and set to 6 dB,

the peak search algorithm will only consider signals with amplitude greater than the

–90 dBm threshold that rise 6 dB above the threshold and then fall back to the

threshold.

NOTE

If a signal comes onto the screen falling and falls all the way to the threshold

without ever rising, it is considered a peak at the far-left edge of the display.

Similarly, if a signal rises from the threshold and leaves the screen without ever

falling, it is considered a peak at the far-right edge of the display. See the

diagram below.

Remote Command

:CALCulate:MARKer:PEAK:THReshold <ampl>

:CALCulate:MARKer:PEAK:THReshold?

Example Turn on the threshold criterion:

:CALC:MARK:PEAK:THR:STAT ON

326 Spectrum Analyzer Mode User's &Programmer's Reference

Keysight x-series User Manual

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