Racal Instruments 1256 Manual page 144

Publication No. 980855 Rev. A
Synchronous Mode
of Operation
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:DIGital
:SYNChronous
:STATe <module list> ,
:DATA <port> , <data list>
:DATA? <port>
:INDex <port list> , <index>
:INDex? <port list>
:POINts <port> ,
:POINts? <port>
:CLEar <port list>
:CLOCk
:CLOCk
:BUSY
:BUSY?
The sequence for using the 1260-114 modules is as follows:
A) Use the DIGITAL:CONFIGURE command to select which
port(s) will be used in the synchronous mode of operation,
and which will be used in the asynchronous mode of
operation.
B) For each port to be used as a synchronous port, determine
if the port will be used as a synchronous input port or a
synchronous output port.
C) For each Synchronous Output Port:
1) Use the DIGITAL:STATE command to enable the
port.
2) Use the DIGITAL:SYNCHRONOUS:DATA command
to load the data bytes which will be clocked out.
D) For each Synchronous Input Port:
1) Use the DIGITAL:STATE command to disable the
port.
2) Use the
command to define the number of data points that
will be acquired and stored for the port.
1256 User Manual
{ ON | OFF |1| 0 }
<number of points>
[:POLarity] <module list> ,
{ NORMal | INVerted }
[:POLarity]? <module list>
[:POLarity] <module list> ,
{NORMal | INVerted}
[:POLarity]? <module list>
DIGITAL:SYNCHRONOUS:POINTS
Digital Module Operation 7-7