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SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)FUTURE
SA Mode Settings
important when using RF Burst or Video triggering in wider spans, because the
signal providing those triggers has limited bandwidth. Learn more about Auto
trigger in
For more conceptual information on this topic, please refer to Spectrum
Analysis Basics (App Note 150), pages 31 - 35, at
https://www.keysight.com/us/en/assets/7018-06714/application-notes/595
2-0292.pdf.
How to set FFT Gating
1. Create a non-zero span measurement. Wider frequency spans take more
2. Press Sweep 3 >
3. Then choose from the following:
When you have properly setup the Gate Trigger, Width, and Delay using the
Gate View measurement, you can turn Gate View OFF to return to the full
screen non-zero span measurement with FFT Gating ON, the RBW set, and the
Trigger settings active.
202
"Auto Trigger Time" on page
time to acquire.
Trigger Settings
—
Gate View OFF ON
displayed below the non-zero span window. The gate view
measurement helps to configure the gate width and delay by
revealing (with green markers) the location of the gate relative to
the trigger event. The zero span measurement is tuned to the center
frequency of the non-zero span measurement with about 5 MHz of
bandwidth. The Y-axis scale is the same for both windows.
—
Gate View Time
Enter a value using the numeric keypad, the
rotary knob. This value is annotated as Swp (nn) below the window.
—
FFT Gating OFF ON
delay are applied to the non-zero span measurement. The Res BW is
set to a value that is inversely proportional to the gate width.
—
Gate Width
Set the width of the gating area within the non-zero
span window. The gating area is indicated by two vertical green
lines. Enter a value using the numeric keypad, the
the rotary knob.
—
Gate Delay
Effectively moves the gating area left (negative delay) or
right (positive delay) relative to the trigger event. Enter a value
using the numeric keypad, the
200.
FFT Gating Setup
>
When ON, a separate zero span measurement is
Set the X-axis span for the non-zero span window.
When ON, the trigger type, gate width, and
arrows, or the rotary knob.
Keysight N9915-90020 User's Guide
arrows, or the
arrows, or
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