Triggering - Agilent Technologies FieldFox N9912A User Manual

 Enter a value using the numeric keypad.
 Then select a multiplier key. Learn about multiplier abbreviations on page 18.
When the sweep time is longer than can be acquired with the current available
memory,
Four times the amount of memory is available with the FieldFox A.04.00 release,
allowing longer sweep times in Zero Span.

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.
FFT Gating is available for non-zero span measurements. Learn more about FFT
Gating at:
Trigger Type
 Press Sweep 3
 Then
 Then
 Then choose from the following:
Trigger Slope
Trigger Slope determines which edge of an External or Video trigger signal
initiates a sweep.
 Press Sweep 3
 Then
 Then
 Then choose from the following:
76
is displayed on the screen. Learn more on page 83.
Meas UNCAL
http://na.tm.agilent.com/fieldfox/help/FieldFox.htm
Trigger Settings
Trig Type
Free Run Triggering is provided by the FieldFox internal circuitry. A new
o
sweep begins when the previous sweep ends.
External A sweep is triggered on an external TTL signal at the EXT
o
TRIG/EXT REF BNC connector on the FieldFox top panel.
Video A sweep is triggered on a signal at the RF IN connector when the
o
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
Sweep is triggered by the rising (positive) edge of signal.
Pos
o
Sweep is triggered by the falling (negative) edge of signal.
Neg
o
N9912A FieldFox User's Guide