282 Chapter 4
Instrument Functions: P - Z
Trig
Instrument Functions: P - Z
4.11.2 Video
Activates the trigger condition that allows the next sweep to start if the detected RF envelope
voltage crosses a level set by the video trigger level. When Video is pressed, a line appears on the
display. The analyzer triggers when the input signal exceeds the trigger level at the left edge of the
display. You can change the trigger level using the step keys, the knob, or the numeric keypad. The
line remains as long as video trigger is the trigger type.
Key Path:
Trig
Dependencies/
Couplings: Trigger Delay adjustment is not available with Video triggering.
Video triggering is not available when the detector is Average. Marker Functions
that set the detector to average (such as Marker Noise or Band/Intvl Power) are
not available when the video trigger is on.
This function is not available when the Resolution Bandwidth is less than 1 kHz.
If a Resolution Bandwidth less than 1 kHz is selected while in Video Trigger
mode, the Trigger mode changes to Free Run.
Factory Preset: –25 dBm
Range: Using logarithmic scale: from 10 display divisions below the reference level, up to
the reference level
Using linear scale: from 100 dB below the reference level, up to the reference level
For more information, see “Scale Type” on page 36.
Remote Command:
See “Trig” on page 281 for the command that sets trigger mode. The following commands set/read
the trigger level.
:TRIGge
r[:SE
Quence
]:VIDeo:
LEVel <am
pl>
:TRIGger[:SEQuence]:VIDeo:LEVel?
:TRIGger[:SEQuence]:VIDeo:LEVel:FREQuency <freq> sets the Video Trigger level when in FM
Demod, and Demod View is on
:TRIGger[:SEQuence]:VIDeo:LEVel:FREQuency?
Example: TRIG:SOUR VID selects video triggering.
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