RPR-4000
Operations manual
REV 8-21 31
Page 4 – Trigger settings
Label Parameter Data range Units Data type
TRIG Trigger source INT, EXT, or
XPC
alpha
RR Repetition rate See <TBL> Hz numeric
Trigger source TRIG
The trigger input setting provides 3 trigger sources:
INT: The trigger pulse is provided by the internal rep rate generator with settings
defined in Table 1 in Section IV. Trigger signal is brought out to the connector
labeled ‘TRIGGER OUTPUT’ on the rear panel of the unit.
EXT: The unit is triggered by an external trigger generator provided by the user. is
provided on the rear panel of the RPR-4000. This must be a TTL compatible
signal.
NOTE: An external trigger pulse is required at least once every 15 minutes.
If the unit is allowed to sit in the standby mode for more than approximately 20 minutes
the beeper will sound and an O.V. (over-voltage) message will be displayed even though
an over-voltage condition does not exist.
XPC: The trigger pulse is provided via the RS232 serial port using the following
command: ‘CT:<CR>’. One trigger will be generated for each command entered.
See Section 3: Remote Programming for more information.
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