Triggering - Keysight FieldFox B Series User Manual

SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings

Triggering

SA
"
sweep, the FieldFox displays the following popup message:
"Note: Trig Type has no effect while in STEP sweep mode"
External, Video, and RF Burst triggering allows you to initiate an SA mode
sweep using an external event such as a signal burst.
All three trigger types can be used in either Zero Span (time domain) or FFT
frequency sweeps. Learn more in
Learn more in
FFT Gating is available for non-zero span measurements. Learn more about
FFT Gating in
Trigger Type
— Press Sweep 3 >
— Then choose from the following:
The following two selections are similar in that they both trigger a sweep from
a signal at the SA RF Input connector. Experiment with both selections to find
the best trigger type for your application.
—
—
Keysight N9938-90006 User's Guide
STEP
sweeps do not have trigger behavior. So, they are essentially always in
FREERUN
" mode. If you try to set a trigger (other than FREERUN) in SA Step
"Sweep Type" on page
"FFT Gating (Opt 238)" on page
Trigger Settings
— Free Run Triggering is provided by the FieldFox internal circuitry. A
new sweep begins when the previous sweep ends.
— External A sweep is triggered on an external TTL signal at the Ref
In/Trig In connector on the FieldFox top panel. Choose to trigger on
the rising slope at about 1.7 V or on the falling slope at about 1.0 V
using the Trigger Slope setting (below).
— Periodic sets a trigger that repeats at the period rate entered.
Periodic trigger's phase can be altered by the Offset value.
Video A sweep is initiated when the displayed amplitude of an incoming
signal crosses the settable Trigger Level. This selection can detect
low-amplitude signals, but also has been filtered considerably and may not
be a true representation of the incoming signal.
RF Burst A sweep is initiated when the signal at the third IF (analog) stage
crosses the settable Trigger Level. This selection offers a wider bandwidth
and may be a better representation of the incoming signal than Video
trigger. However, RF Burst is not as sensitive to triggering on low-level
signals.
"Zero Span Measurements" on page
187.
199.
> Trig Type
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