Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
NOTE
In the event that a sequence of trace points with precisely the same values
represents the maximum, the leftmost point is found. 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 "More Information" on page 328.
Remote Command
:CALCulate:MARKer:PEAK:EXCursion <rel_ampl>
:CALCulate:MARKer:PEAK:EXCursion?
Example
:CALC:MARK:PEAK:EXC:STAT ON
Set the minimum peak excursion requirement to 30 dB:
:CALC:MARK:PEAK:EXC 30 DB
Dependencies Available only when Y axis unit is amplitude units, otherwise grayed-out
Couplings Whenever you adjust the value of Peak Excursion manually(with the knob, step keys, or by completing
a numeric entry), if Peak Threshold is ON, "Pk Threshold Line" on page 329 is turned ON, and the Peak
Excursion Region is displayed
Preset Automatically computed
State Saved Saved in instrument state
Min 0.0 dB
Max 100.0 dB
Auto Function
Remote
Command
:CALCulate:MARKer:PEAK:EXCursion:STATe OFF | ON | 0 | 1
:CALCulate:MARKer:PEAK:EXCursion:STATe?
Preset
ON
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.
328 Spectrum Analyzer Mode User's &Programmer's Reference

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)