8 Trigger
8.1 Trigger
8.1 Trigger
Contains controls that let you select the trigger source, and setup of each of the
trigger sources. The instrument is designed to allow triggering from many sources,
for example, Free Run, Video, External, RF Burst, etc.
In general, each Measurement can have a different Trigger Source, and each
Measurement remembers its previous-Trigger Source.
8.1.1 Select Trig Source
Specifies the trigger source for the currently selected instrument input (RF or I/Q). If
you change inputs, the new input remembers the trigger source it was last
programmed to for the current measurement and uses that trigger source. When in
External Mixing, the instrument uses the RF trigger source. You can directly set the
trigger source for the RF Input and for the I/Q input using SCPI commands; see
"Trigger Source Presets" on page 2323, "RF Trigger Source (Remote Command
Only)" on page 2325 ,and "I/Q Trigger Source (Remote Command Only)" on page
2327.
In general, each Measurement can have a different Trigger Source, and each
Measurement remembers its previously-set Trigger Source. Not every Trigger
Source is available for every Measurement, so the available choices for Select Trig
Source may vary from Mode to Mode and Measurement to Measurement. The
trigger sources that are available for each measurement are shown in the “List of
Available Trigger sources” dropdown below.
Note that the controls available on the Trigger Tab change depending on which
trigger source is selected. Tap each trigger source in the table in the “List of
Available Trigger sources” dropdown to see what parameters are available for that
trigger source.
Note that most measurements require the inclusion of a <measurement> parameter
in the Trigger Source command. However, for the Swept SA measurement and RTSA
this is not the case; for backwards compatibility, no <measurement> parameter is
used when setting the Trigger Source for the Swept SA measurement or RTSA.
Waiting for Trigger
After you select a trigger source, the instrument will start its next measurement
when that trigger source is satisfied. For example, if you choose External 1, the next
measurement will start when the appropriate signal appears at the Trigger 1 In
connector.
If the trigger source is not satisfied (for example, if no signal at the appropriate level
appears at the Trigger 1 In connector), after approximately 2 seconds a popup
2315 Short Range Comms & IoT Mode User's &Programmer's Reference
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