Using Scan Lists And External Trigger Input; Figure 8-2, Using External Trigger In And External Trigger Out - Racal Instruments 1256 Manual

Publication No. 980855 Rev. A

Figure 8-2, Using External Trigger In and External Trigger Out

Using Scan Lists
and External
Trigger Input
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sending each of the following queries:
OUTPUT:TRIG?
If the trigger output is disabled, the reply to this query will be a "0".
If an output trigger is enabled, the reply will be "1".
A delay may also be used to prevent the trigger form getting to the
UUT until a certain time has passed.
OUTP:DELay <output trigger delay time>
This produces a delay from the time the relay closes till the trigger
is felt. The trigger is programmed in seconds, with a resolution of 1
microsecond. This is the resolution and not the accuracy. That
means that you will receive 0.00000 (5 decimal places) when you
read it. Any delay over 10 milliseconds rounds the delay to the
nearest 10 milliseconds.
A scan list allows you to specify a list of switching commands to be
performed. Once you have defined this list, the 1256 will
automatically sequence through the scan list, executing one
command each time it detects a trigger pulse at the external trigger
input of the SYNC/TRIG connector.
Three types of commands may be entered into a scan list:
•
Close a specific relay
•
Recall a state stored in a non-volatile memory location
•
Break (stop scan list processing)
1256 User Manual
Advanced SCPI Operations 8-13
Trigger IN
Trigger OUT