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1256E User Manual
Setting Up the
Synchronous Test
Racal Instruments © 2002
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
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:
Maximum value:
Figures
7-1
(A-D)
DIG:SYNC:DATA command and the DIG:SYNC:INDEX command.
After power-on, or a *RST command, no data is loaded into any
output port buffer of a 1260-114. The index for each port points to
the first location in the buffer.
After executing the command:
DIG:SYNC:DATA (@7(4)),10,20,30,40
the memory buffer for port 4 of module 7 is filled with data as
depicted in Figure 7-1 (A). There are four bytes loaded. The index
for this port points to the next available position in the port buffer,
shown as location 4 in the figure.
command
0
255, but less than, or equal to, the
number of data points loaded
show
the
interaction
Digital Module Operation 7-9
provides
between
the
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