Keysight Technologies EPM-P Series Programming Manual page 105

Power Meter Remote Operation 1
The status byte enable register (SRE, service request enable) is cleared when you:
– cycle the instrument power.
– execute a *SRE 0 command.
Using *STB? to read the status byte
The *STB? (status byte query) command is similar to a serial poll except it is
processed like any other power meter command. The *STB? command returns
the same result as an IEEE-488 serial poll except that the request service bit (bit
6) is not cleared if a serial poll has occurred. The *STB? command is not handled
automatically by the IEEE-488 bus interface hardware and the command will be
executed only after previous commands have completed. Using the *STB?
command does not clear the status byte summary register.
The standard event register
The standard event register reports the following types of instrument events:
power-on detected, command and syntax errors, command execution errors,
self-test or calibration errors, query errors, or when an overlapped command
completes following a *OPC command. Any or all of these conditions can be
reported in the standard event summary bit through the enable register. You must
write a decimal value using the *ESE (event status enable) command to set the
enable register mask.
Keysight EPM-P Series Programming Guide 105