Free Run - Keysight x-series User Reference Manual

The following examples show trigger setup parameters using an external trigger source.
Example 1 illustrates the trigger conditions with negative slope and no trigger occurs during trigger Holdoff
time.
Example 2 illustrates the trigger conditions with positive slope, trigger delay, and auto trigger time.

Free Run

Pressing this key, when it is not selected, selects free-run triggering. Free run triggering occurs
immediately after the sweep/measurement is initiated.
Key Path
Example
State Saved
Status Bits/OPC
dependencies
Initial S/W Revision
EMI Receiver Mode Reference
Trigger
TRIG:SOUR IMM Swept SA measurement
TRIG:<meas>:SOUR IMM Measurements other than Swept SA
Saved in instrument state
The Status Operation Register bit 5 "Waiting for Trigger" is set at the same time as the Sweeping or
Measuring bit is set. It is cleared when the trigger actually occurs (that is, after the trigger event
occurs and all the applicable trigger criteria have been met). A corresponding pop-up message
("Waiting for trigger") is generated if no trigger signal appears after approximately 2 sec. This
message goes away when a trigger signal appears.
Prior to A.02.00
7 Trigger Functions
Trigger
365