Stb? Mapping - Agilent Technologies EPM-P Series Programming Manual

IEEE488.2 Command Reference
*STB?
*STB?
The *STB? (STatus Byte) query returns bit 0 to 5 and bit 7 of the power
meter's status byte and returns the Master Summary Status (MSS) as
bit 6. The MSS is the inclusive OR of the bitwise combination (excluding
bit 6) of the Status Byte and the Service Request Enable registers. The
format of the return is <NR1> in the ranges of 0 to 255. Table 16-6 shows
the contents of this register. Refer to the pullout at the end of chapter 1 for
further information.
Bit
0
1
2
3
4
5
6
7
16-20
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Table 16-6: *STB? Mapping
Weight
1 Not used
2 Device Dependent
0 - No device status conditions have occurred
1 - A device status condition has occurred
4 Error/Event Queue
0 - Queue empty
1 - Queue not empty
8 Questionable Status Summary
0 - No QUEStionable status conditions have occurred
1 - A QUEStionable status condition has occurred
16 Message Available
0 - no output messages are ready
1 - an output message is ready
32 Event Status Bit
0 - no event status conditions have occurred
1 - an event status condition has occurred
64 Master Summary Status
0 - power meter not requesting service
1 - there is at least one reason for requesting service
128 Operation Status Summary
0 - No OPERation status conditions have occurred
1 - An OPERation status condition has occurred
EPM-P Series Power Meters Programming Guide
Meaning