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1256E User Manual
Racal Instruments
©
2002
Advanced SCPI Operations 8-7
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.
Using External
Triggering
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.
Selecting the
Trigger Source
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 |