Gating; Transform Enable; Gating Enable - Keysight N9923A FieldFox User Manual

Transform Enable

Enable Time Domain transform for the specific trace.
 Select the trace.
 Press Measure 4
 Then
 Then choose from:
Gate Enable
Enable Gating for the specific trace.
 Select the trace.
 Press Measure 4
 Then
 Then choose from:

Gating

Perhaps the most beneficial feature of Time Domain transform is the Gating function.
When viewing the Time Domain response of a device, the gating function can be
used to "virtually" remove undesired responses. You can then simultaneously view a
frequency domain trace as if the undesired response did not exist. This allows you to
characterize devices without the effects of external devices such as connectors or
adapters.
Gating is best performed while viewing a Time Domain trace. Then, either disable
Transform, or separately view a frequency domain trace to see the trace with the
gated effects removed.
NOTE When a discontinuity in a test device reflects energy, that energy will not reach
subsequent discontinuities. This can "MASK", or hide, the true response which would
have occurred if the previous discontinuity were not present. The Gating feature does
NOT compensate for this.
The following image shows how gating can affect measurement results.
Time Domain - Option 010
Transform
Trace displays Time Domain data.
On
o
Trace displays frequency domain data.
Off
o
Transform
Trace displays Time Domain data.
On
o
Trace displays frequency domain data.
Off
o
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