HP 53150A Series Programming Manual page 91

Chapter 3 Programming Your Counter for Remote Operation
Programming the Counter to Synchronize Measurements
Set up program to specify service routine and enable interrupt when SRQ
is asserted:
:INIT
*OPC
The program can do other things while it is waiting for SRQ.
When SRQ occurs, and the Counter has been identified as the cause of the
SRQ, ask for the data:
DATA?
Programming Guide
Start measurements.
Enable OPC bit.
Ask for data.
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