Selecting The Trigger Count - Racal Instruments 1256 Manual

1256 User Manual
Selecting the
Trigger Count
Advanced SCPI Operations 8-8
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Scan List operation is initiated by sending an
INIT:IMMEDIATE command (or
INIT:CONTINUOUS command).
EXT This selects the 1256 external trigger input line.
Each time a low-going pulse is received on the
line, the scan list advances to the next element.
After power-up, and after a *RST command, the trigger source is
set to IMMEDIATE.
The present trigger
TRIGGER:SOURCE? query. The reply to this query will be one of
the following:
BUS
HOLD
IMM
EXT
The trigger count determines how many elements will be scanned
in the scan list. That is, if the trigger count is 10, then the scan list
will advance 10 times before halting. Any triggers received from
the selected trigger source will be ignored after the trigger count
has been satisfied.
The syntax for the TRIGGER:COUNT command is:
:TRIGger
[:SEQuence]
:COUNt <trigger count>
The <trigger count> is a numeric value between 1 and
31
21747483647 (2 -1).
The present trigger count may be queried by using the
TRIGGER:COUNT? query.
Publication No. 980855 Rev. A
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