Table 1-6 Bit Definitions - Standard Event Register - Keysight N1911A Programming Manual

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
is 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.
Table 1-6 Bit Definitions - Standard Event Register
Bit Number Decimal Value
0 1
1 2
2 4
3 8
4 16
N1911A/1912A P-Series Power Meters Programming Guide
Definition
Operation Complete
All overlapped commands following an *OPC command have been completed.
Not Used. (Always set to 0.)
Query Error
A query error occurred, refer to error numbers 410 to 440 in the user's guide.
Device Error
A device error occurred, refer to error numbers 310 to 350 in the user's guide.
Execution Error
An execution error occurred, refer to error numbers 211 to 241 in the user's guide.
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