Keysight x-series User Manual

8 Trigger
8.1 Trigger
Log Plot and Spot Frequency measurements, in the Phase Noise Mode, do not
support Video Trigger.
The Trigger tab contains the following Trigger Source dependent controls when
Video Trigger is selected:
–
"Prot Frame Aligned" on page 2660
–
"Trigger Delay" on page 2663
–
"Trigger Slope" on page 2667
Additional controls are also present, which are not dependent on the selected
Trigger Source.
Note that Video Trigger is a software trigger of the acquired trace for some
measurements and a hardware trigger of the IF envelope for others. Most
measurements support one method or the other, although some (like ACP) don’t
support Video Trigger at all. For those measurements that support Video Trigger as
a software trigger, the Trigger Level units will be dependent on the current Y Axis
Unit for the measurement; for those that support Video Trigger as an IF Envelope
trigger, the units are typically in dBm.
Example Swept SA measurement:
:TRIG:SOUR VID
Measurements other than Swept SA:
:TRIG:<meas>:SOUR VID
Annunciation Video (in the Meas Bar)
8.1.1.3 ADC Trigger
Some IF Paths in certain models (like N9042B) in IQ Measurements have an ADC
trigger. ADC is like the Video trigger, but with 2 limitations due to a lack of post-
processing.
First, the trigger is not limited to the current measurement’s setup IF BW. The
trigger sees everything in the passband, so measurements like IQA Complex
Spectrum can be triggered outside of the current Digital IF BW.
The final limitation is, due to lack of post-processing, the amplitude accuracy of the
ADC trigger is less than the video 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.
2647 Spectrum Analyzer Mode User's &Programmer's Reference

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)