Keysight x-series Instruction Manual

8 Trigger
8.1 Trigger
The Video trigger level is shown as a labeled line on the display. The line is displayed
as long as Video is the selected trigger source. The Trigger Level line can be
adjusted using the step keys, knob, or numeric keypad. It can also be dragged on
the display with your finger or with a mouse.
When the detector selected for all active traces is the average detector, the video
signal for triggering does not include any VBW filtering.
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 2340
–
"Trigger Delay" on page 2343
–
"Trigger Slope" on page 2347
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.
2329 Short Range Comms & IoT 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)