[Source:]Digital:trace[:Data] - Keysight VXI Bus 75000 C Series User And Programming Manual

Keysight E1458A Command Reference
Example
DIG:TRAC:DATA first_block, #210ABCDEFGHIJ sends the data "ABCDEFGHIJ" to
the user memory block first_block. Since the ASCII character A has a decimal
value of 65, the equivalent of 65 is stored in the first byte of first_block (and so
on).

[SOURce:]DIGital:TRACe[:DATA]?

[SOURce:]DIGital:TRACe[:DATA]? <name> reads a block of data from a previously
defined user memory block.
Parameters
Comments
Example
DIG:TRACe? first_block reads data from a block named first_block. If the previous
command example is sent, this command will return the string
#210ABCDEFGHIJ.
102
Parameter Parameter
Name Type
<name> String
– <name> must have been previously defined by a DIGital:TRACe:DEFine
command.
– The maximum length for <name> is 12 characters.
Range of Values
Name of user memory block
(maximum 12 characters)
Keysight E1458A 96-Channel Digital I/O Module User Guide
[SOURce:] Subsystem
Default
None