8 Trigger
8.3 Gate Settings
ESA compatibility
8.3.5 Gate Method
Lets you choose one of the three different types of gating. Not all types of gating are
available for all measurements.
Remote Command
[:SENSe]:SWEep:EGATe:METHod LO | VIDeo | FFT
For option details, see "LO" on page 2690, "Video" on page 2690 or "FFT" on page 2691
[:SENSe]:SWEep:EGATe:METHod?
Example
:SWE:EGAT:METH FFT
Dependencies This function is only available in the Swept SA measurement in Spectrum Analyzer Mode
This control is unavailable when Gate is On and FFT Sweep Type manually selected
When selected, Sweep Type is forced to Swept, and the FFT selection in Sweep Type is grayed-out
Only the FFT method is supported in non-SA products
Only the FFT method is supported by VXT models M9410A/11A/15A/16A
Preset
LO
State Saved Saved in instrument state
Range
Video|LO|FFT
Annunciation In Meas Bar
LO
In LO gating, when Gate is ON, the LO sweeps whenever the gate conditions as
specified in the Gate menu are satisfied by the signal at the Gate Source.
This form of gating is more sophisticated, and results in faster measurements. With
Gated LO, the instrument only sweeps while the gate conditions are satisfied. This
means that a sweep could take place over several gate events. It would start when
the gate signal goes true and stop when it goes false, and then continue when it
goes true again. But since the LO is sweeping as long as the gate conditions are
satisfied, the sweep typically finishes much more quickly than with Gated Video.
When in zero span, there is no actual sweep performed. But data is only taken while
the gate conditions are satisfied. So even though there is no sweep, the gate
settings will impact when data is acquired.
Video
In Video gating, when Gate is ON, the video signal is allowed to pass through
whenever the gate conditions as specified in the Gate menu are satisfied by the
Spectrum Analyzer Mode User's &Programmer's Reference 2690
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