Table 13-4 *Stb? Mapping; Stb - Agilent Technologies U2000 Series Manual

*STB?

The *STB? (STatus Byte) query returns bit 0 to 5 and bit 7 of the power
sensor'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.
register. Refer to the Status Block Diagram at the end of
Subsystem" for further information.

Table 13-4 *STB? Mapping

U2000 Series Programming Guide
Bit Weight Meaning
0 1 Not used
1 2 Device Dependent
0 - No device status conditions have occurred
1 - A device status condition has occurred
2 4 Error/Event Queue
0 - Queue empty
1 - Queue not empty
3 8 Questionable Status Summary
0 - No QUEStionable status conditions have occurred
1 - A QUEStionable status condition has occurred
4 16 Message Available
0 - no output messages are ready
1 - an output message is ready
5 32 Event Status Bit
0 - no event status conditions have occurred
1 - an event status condition has occurred
6 64 Master Summary Status
0 - power sensor not requesting service
1 - there is at least one reason for requesting service
7 128 Operation Status Summary
0 - No OPERation status conditions have occurred
1 - An OPERation status condition has occurred
IEEE 488.2 Command Reference
Table 13- 4 shows the contents of this
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Chapter 9, "STATus
309