8 Trigger
8.1 Trigger
If ADC trigger is available for at least one IF Path on a model, then the ADC trigger
will always be seen as a trigger option in IQ Measurements. However, it will only be
available (not grayed out) to select when using IF Paths that support it.
If Video Trigger is selected and measurement setup (IF Path or IF BW) is changed to
a path that only supports the ADC trigger instead, then ADC trigger will be selected
and vice versa.
Example Measurements other than Swept SA:
:TRIG:<meas>:SOUR ADC
Annunciation ADC (in the Meas Bar)
8.1.1.4 Line
When Line is selected, start of a new sweep/measurement will be synchronized with
the next cycle of the line voltage.
Line trigger is not available when operating from a "dc power source", for example,
when the instrument is powered from batteries.
Line trigger is not available when using modular instruments like the VXT.
The Trigger tab contains the following Trigger Source dependent controls when Line
Trigger is selected:
–
"Trigger Delay" on page 2461
–
"Trigger Slope" on page 2465
Additional controls are also present that are not dependent on the selected Trigger
Source.
Example
:TRIG:SOUR LINE
Swept SA measurement
:TRIG:<meas>:SOUR LINE
Measurements other than Swept SA
Annunciation LINE (in the Meas Bar)
8.1.1.5 External 1
When External 1 is selected, a new sweep/measurement starts when the external
trigger condition is met using the TRIGGER 1 IN input connector on the rear panel.
Grayed-out if Ext 1 is in use by Point Trigger in the Source Setup menu of Swept SA.
Forced to "Free Run" on page 2446 if already selected and Point Trigger is set to
External 1.
Vector Modulation Analyzer Mode User's &Programmer's Reference 2448
To Next Page
Loading...
