Technical data

132 Chapter 8
Concepts
Trigger Concepts
Concepts
Trigger Concepts
Trigger functions are only available when the Agilent CSA is in zero
span. In non-zero spans, the Agilent CSA is always in Free Run.
Selecting a Trigger
1. Video Triggering
Video triggering controls the sweep time based on the detected
envelope signal to steady the signal on the display. Video triggering
triggers the measurement at the point at which the rising signal
crosses the trigger level horizontal green line on the display:
Press
Meas Setup, Trigger, Video, −30, dBm.
2. External Triggering
In the event that you have an external trigger available that can be
used to synchronize with the signal of interest, connect the trigger
signal to the rear of the Agilent CSA using the EXTERNAL
TRIGGER INPUT connector. You can change the slope of the
external trigger signal on which you want the analyzer to trigger
using the Trigger Slope feature.
Press
Meas Setup, Trigger, External.
3. RF Burst Triggering
RF burst triggering occurs in the IF circuitry chain, as opposed to
after the video detection circuitry with video triggering. In the event
video triggering is used, the detection filters are limited to the
maximum width of the resolution bandwidth filters. The RF burst
signal level can be set using the Trigger Level feature.
Press
Meas Setup, Trigger, RF Burst.
Trigger Delay
Trigger delay can be used to move the sweep trigger point arbitrarily to
allow closer examination of waveform patterns (Press
Trigger, Trigger
Delay
, and enter a delay time).