Agilent Technologies E6432A manual Trigger Out

To make the most of this list mode, comprehensive triggering is available for executing the list entries in the most useful way for the test program. Input triggering can be from the front panel SMB connector, over the VXI TTL backplane triggers, VXI0-VXI7, or manually via the SFP. Any one

of the backplane triggers can be assigned to Trigger In. The Trigger Out, or settled marker, is a synchro- nization signal that can be used as a data-ready flag, a trigger to a meas- uring receiver, or a timing signal for the host controller. It is always avail- able at the front panel. Any one of the VXI backplane triggers can be assigned to Trigger Out.

Sync In is a reset trigger. It may be set to abort a list and reset the list pointer to the beginning of list mem- ory. It may be used to run a list. It may be disabled. Any one of the VXI backplane triggers may be assigned to Sync In. Sync Out is the program- mable marker. Any entry in the list mode may enable the Sync Out mark- er. If enabled, it will coincide with

Table 2

Trigger In	Automatic (default)	Trigger In disabled
	trigger once	wait for trigger, then run list once
	triggered	wait for trigger to advance to next list entry
Trigger Out		settled marker - always enabled
Sync In	auto (default)	Sync In disabled
	wait	wait for sync to start list
	restart	abort list and restart from beginning
	wait for start/restart	combines wait for start and abort/restart
Sync Out	disabled (default)	list entry does not generate sync marker on
		settled (Trigger Out still enabled)
	enabled	list entry generates sync marker on settled
		(and Trigger Out marker)
Repeat		run list continuously until aborted
Blanking	enabled (default)	blank RF while tuning (minimum 270 µs
		settling time on frequency changes)
	disabled	do not blank RF while tuning
Long blanking	disabled (default)	frequency settled to within 50 kHz when
		Trigger Out edge occurs
	enabled	RF blanking extended to 350 µs. Frequency
		settled to noise level when Trigger Out edge
		occurs.
Attenuator switch		blanking always extended to 20 ms

the Trigger Out, or settled marker, for that list entry. Any one of the VXI backplane triggers may be assigned to Sync Out.

Table 2 summarizes the trigger, marker, and blanking modes.

An example function call to down- load an array of list entry points is:

ViSTATUS HPE6432_WriteListPoints (ViSession instrumentHandle, ViUInt32 startingPoint ViReal64 Frequency[], ViReal64 ALC_value[], ViInt16 Attenuator[], ViInt16 featureBits[], ViInt16 alcOffset[], ViUInt32 numberOfPoints);

Once downloaded, the list is execut- ed by calling Hpe6432_run_list(). Depending on the trigger mode set, the list is run all the way through, repeated until aborted, or executed one entry per input trigger.

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