Timing principle using external trigger
When the device is in a rest state (no current output signals), a rising edge on a trigger starts a delay
sequence. The trigger comes from TRIG IN, or from a software command trigger (depending on the
selected channel source).
The sequence includes two external trigger phases:
•
After an insertion delay (<65ns), a pulse appears on each channel after a specified delay
•
At the end of sequence, after the last delayed pulse, the delay generator is ready for
repetitive trigger mode.
When a sequence is in progress, the instrument does not respond to a trigger event.
The MODEL 745-T must be configured (trigger, delay, etc.) before starting any sequences.
Figure - 12.
External Trigger Timing
In response to an input pulse the device can generate a single delayed output (single shot) or
repetitive delayed output (repetitive mode with a Trig In prescaler value = 1). As explain before, the
single shot pulse is conditioned by the soft trigger command.
The use of the Prescaler value is depicted on Figure - 13. A Channel trigger source is set to external
trigger.
3/2/18
Berkeley Nucleonics Corporation, 2955 Kerner Blvd. San Rafael, CA 94901
[email protected], Call 800-234-7858 or Live-Chat @ www.berkeleynucleonics.com
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