How To Set Sweep Acquisition - Keysight A Series User Manual

SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings
However, you can adjust this setting in order to increase the probability of
intercepting and viewing pulsed RF signals.
For example, with SwpAcquisition set to Auto a pulsed GSM signal is NOT
visible on the FieldFox screen, as shown in a blue trace in the following image.
While watching the trace, increase the SwpAcquisition value until the pulse
spectrum rises out of the noise and reaches its maximum level. Increasing the
SwpAcquisition value beyond this point only slows the update rate (increases
the actual Sweep time readout) but does not improve measurement quality.
Figure 9-11 GSM Signal in Framed Data Format
In the graphic above, a GSM signal in a framed data format; timeslot zero ON;
all others OFF;
PRF = 218 Hz, Duty Cycle = 12.5%. The pulsed signal becomes visible on every
sweep update with SwpAcquisition = 50.

How to set Sweep Acquisition

SwpAcquisition is NOT an absolute measure of time, but a relative number
between 1 (fastest) and 5000 (slowest) sweep time. The actual time that was
required to complete a sweep is annotated on the screen.
1. Press Sweep 3.
2. Then
3. Then choose from the following:
Keysight N9927-90020 User's Guide
SwpAcquisition Auto
— Auto Sweep is set to the fastest sweep possible with the
current settings.
— Man Enter a relative acquisition value between 1 and
5000, where:
— Man Enter a relative acquisition value between 1 and 5000, where:
Man.
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