GPIB Commands
5-17
5.6 Status Byte Register
The Status Byte Register is composed of eight bits that summarize an overlaying status data
structure. The Status Byte Register can be read using either *STB? or SPOLL that returns a
decimal expression of the register contents.
Logical OR
Figure 5-2 Status Byte Register
Bit No. Bit Weight Description
7 128 It is the Operation Status Register Summary Bit.
6 64
It is the Request Service Bit – this bit is set when any enabled bit of
the Status Byte Register has been set, which indicates the
11021/11021-L LCR Meter has at least one reason for requesting
service.
5 32 It is the Standard Event Status Register Summary Bit.
4 16
It is the Message Available Bit – this bit is set whenever the
11021/11021-L LCR Meter has data available in the output queue,
and is reset when the available data is read.
3-0 It is always 0.
Table 5-1 Assignments of Status Byte
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