B&K Precision 4052-4055 - Manual - Manual (Page 49)

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the burst period.
Off – Trigger output be disabled
If External source is selected previously, the Edge option will be available, and the
Trig On option will not be available.
The up arrow means it will trigger off the rising edge of the external
signal.
The down arrow means it will trigger off the falling edge of the external
signal.
Note: These options are not available for Gated burst operations.
If Manual source is previously selected, the Trig option in RED will be available on the
first page of the menu. Each press of this option using the function key on the front
panel will trigger a burst. The Trig On option will also be available.
On – The ExtTrig BNC connector in the rear panel will output a pulse (>1
µHz) at the start of each sweep.
Off – The pulse output from the ExtTrig BNC connector is disabled.