Technical data

3 Remote Interface Reference
SCPI Status Registers
112 E364xA User’s and Service Guide
Using *OPC to signal when data is in the output buffer
Generally, it is best to use the “Operation Complete” bit (bit
0) in the Standard Event register to signal when a command
sequence has completed. This bit is set in the register after
an *OPC command has been executed. If you send *OPC
after a command which loads a message in the power
supply’s output buffer (query data), you can use the
“Operation Complete” bit to determine when the message is
available.
However, if too many messages are generated before the
*OPC command executes (sequentially), the output buffer
will overload and the power supply will stop processing
commands.