Triggering - Keysight N9912A User Manual

SA (Spectrum Analyzer) Mode
SA Mode Settings

Triggering

External and Video triggering allows you to start a FieldFox sweep which is
initiated by an external event such as a signal burst.
External and Video triggering can be used in either Zero Span (time domain) or
frequency span measurements. However, Video triggering in frequency domain
sweeps is limited to cases where Res BW is less than or equal to 200 kHz.
The following Trigger Settings are available ONLY when performing an FFT
sweep or when in Zero Span. Learn more about FFT on
more about Zero Span on
Trigger Type
— Press Sweep 3.
— Then
— Then
— Then choose from the following:
Trigger Slope
Trigger Slope determines which edge of an External, Video, or RF Burst trigger
signal initiates a sweep.
— Press Sweep 3.
— Then
— Then
— Then choose from the following:
Keysight N9912-90001 User's Guide
page
Trigger Settings.
Trig Type.
— 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).
— Video A sweep is triggered on a signal at the RF IN connector when
the amplitude of the incoming signal exceeds the settable Trigger
Level. In frequency domain sweeps, Res BW must be set to 200 kHz
or less. This setting is called Video trigger because the signal that
initiates the trigger appears on the display.
Trigger Settings.
Trig Slope.
—Pos Sweep is triggered by the rising (positive) edge of signal.
—Neg Sweep is triggered by the falling (negative) edge of signal.
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