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User Manual 161
When Periodic is selected, the analyzer uses the built-in period timer signal as a trigger. The
trigger event is set by the period timer parameter, which is modified by the offset and periodic sync
Src.
Use this trigger when there is a periodic signal but no reliable signal to trigger. You can
synchronize the periodic signal to an external event (using the periodic sync Src) to get closer to a
reliable trigger signal.
If no synchronization source is selected, then the internal timer will not be synchronized with any
external timed events.
Command format :TRIGger:SOURce
:TRIGger:SOURce?
Instructions sets the trigger source.
gets the trigger source.
Parameter type Enumeration
Parameter Range "IMMediate ", "VIDeo ", "EXTernal ","FRAMe"
Return "IMM", "VID", "EXT" ,"FRAMe"
Example :TRIGger:SOURce VID
5.6.2 Trigger Level
Sets the amplitude level of the video trigger (only absolute levels are supported). A trigger occurs
when the slope of the video signal crosses this level.
When the selected trigger source is video trigger, the trigger level will be displayed as an orange
line, and the right end of the line will be displayed as:
Trig Line: xxxx dBm
Command format :TRIGger: {type}:LEVel
:TRIGger: {type}:LEVel?
Instructions sets the trigger level.
gets the trigger level.
{type}: "VIDeo", "EXTernal"
Parameter type Float
Parameter Range
-
300~50dB
Return Float
Example :TRIGger:VIDeo:LEVel -20