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Peak Search
More Information
If two signals are very close together and the peak excursion and threshold criteria are met at the outside
edges of the combined signals, this function finds the highest of these two signals as a peak (or next
peak). However, if a signal appears near the edge of the screen such that the full extent of either the
rising or falling edge cannot be determined, and the portion that is on screen does not meet the excursion
criteria, then the signal cannot be identified as a peak.
When measuring signals near the noise floor, you can reduce the excursion value even further to make
these signals recognizable. To prevent the marker from identifying noise as signals, reduce the noise
floor variations to a value less than the peak-excursion value by reducing the video bandwidth or by
using trace averaging.
Pk Threshold On/Off
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 Pk Excursion and Pk Threshold are on, a signal must rise above the Pk 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
Remote Command :CALCulate:MARKer:PEAK:EXCursion <rel_ampl>
:CALCulate:MARKer:PEAK:EXCursion?
:CALCulate:MARKer:PEAK:EXCursion:STATe OFF|ON|0|1
:CALCulate:MARKer:PEAK:EXCursion:STATe?
Example :CALC:MARK:PEAK:EXC:STAT ON
:CALC:MARK:PEAK:EXC 30 DB sets the minimum peak excursion
requirement to 30 dB
Dependencies Available only when Y axis unit is amplitude units, otherwise grayed out.
Couplings Whenever you adjust the value of Pk Excursion (with the knob, step keys, or
by completing a numeric entry), and Peak Threshold is turned ON, the Peak
Threshold Line and the Peak Excursion Region are displayed.
Preset 6.0 dB
ON
Preset 6.0 dB
ON
State Saved Saved in State
Min 0.0 dB
Max 100.0 dB
Initial S/W Revision Prior to A.02.00