1256 User Manual Publication No. 980855 Rev. A
Digital Module Operation 7-8
EADS North America Test and Services
E)
Arm the 1260-114 module by using the
DIGITAL:SYNCHRONOUS:STATE command.
F) Generate pulses on the CLKIN line of the 1260-114 module.
The 1260-114 module will disarm itself when the number of
pulses is equal to, or greater than, the maximum of:
1)
The greatest number of data points downloaded to
any synchronous output port on the module (equals
the value returned by DIGITAL:SYNC:INDEX?).
2)
The greatest number of data points defined for any
synchronous input port on the module ( equals the
value returned by DIGITAL:SYNC:POINTS?).
All data operations are complete when the module disarms itself.
The DIGITAL:SYNCHRONOUS:STATE? query may be used to
determine if the specified module(s) are armed or disarmed.
Setting Up the
Synchronous Test
The DIGITAL:SYNCHRONOUS:DATA command is used to load
data into the memory of the 1260-114. This defines the data that
will be clocked out, one byte per CLKIN pulse.
Each synchronous output port may hold up to 256 data bytes.
Each byte may have a value between 0 and 255. Each time the
DIGITAL:SYNCHRONOUS:DATA command is executed, new data
bytes are added to any data that was previously downloaded.
For example, the commands:
DIG:SYNC:DATA (@7(4)),10,11,12
DIG:SYNC:DATA
(@7(4)),50,60,70,80,90
DIG:SYNC:DATA
(@7(4),255,254
are equivalent to the command:
DIG:SYNC:DATA(@7(4)),10,11,12,50,60,70,80,
90,255,254
The DIGITAL:SYNCHRONOUS:INDEX command provides
flexibility for loading new data to output. This command sets the
location at which the next DIG:SYNC:DATA command will
download.
The value passed as the <index> for this command must satisfy
the following conditions:
Minimum value:
0
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