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1256E User Manual
Using External
Triggering
Selecting the
Trigger Source
Racal Instruments © 2002
EXCLUDE (@1(1,14))
EXCLUDE (@1(2,15))
CLOSE (@1(0))
After these commands have been executed, channel 0 of module 1
is closed. Also, channels 1 through 4, 10 and 12 are closed, since
these are on the same include list as channel 0.
Now, if the command:
CLOSE (@1(13))
is executed, the following actions occur:
A)
Channel 0 is opened since it is on an exclude list with
channel 13
B)
Channels 1, 2, 3, 4, 10, and 12 are opened since they are
on an include list with channel 0
C)
Channel 13 is then closed.
After power-up, and after a "*RST" command has been executed,
all EXCLUDE lists are deleted.
You may provide an External Trigger In signal to control when the
1256 closes or opens relays. Also, the 1256 can provide an
External Trigger Out signal to tell your equipment when the relays
have settled after opening or closing.
These signals connect to the External Trigger In and External
Trigger Out connectors on the 1256 rear panel. Refer to Figure
7-1, Using External Trigger In and External Trigger Out for
connector location and signal information.
The TRIGGER:SOURCE command selects which source is used
to trigger the scan list. Each time a trigger is received from the
selected trigger source, the 1256 advances to the next element on
the scan list.
The syntax for the TRIGGER:SOURCE command is:
:TRIGger
[ :SEQuence ]
:SOURce
{ BUS | HOLD |
Advanced SCPI Operations 8-7
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