User manual

MAUI Oscilloscopes Remote Control and Automation Manual
STB (Status Byte) Status Register Structure
Bit Value Name Description Notes
7 128 DIO7 Reserved for
future use.
6 64 MSS/RQS
MSS = 1
RQS = 1
At least 1 bit in
STB masked by
SRE is 1, service
is requested.
The Master Summary Status (MSS) indicates the oscilloscope
requests service, while the Service Request status (when set)
specifies the oscilloscope issued a service request. Bit position 6
depends on the polling method:
MSS if an *STB? query is received
RQS if serial polling is conducted
Example:
If SRE = 10 and STB = 10, then MSS = 1.
If SRE = 010 and STB = 100 then MSS = 0.
5 32 ESB
An ESR enabled
event has
occurred.
The Event Status Bit (ESB) indicates whether or not one or more of
the enabled IEEE 488.2 events occurred since the last reading or
clearing of the Standard Event Status Register (ESR). ESB is set if
an enabled event becomes true (1).
4 16 MAV Output queue is
not empty.
The Message AVailable bit (MAV) indicates whether or not the Out-
put queue is empty. The MAV summary bit is set true (1) whenever
a data byte resides in the Output queue.
3 8 DIO3 Reserved.
2 4 VAB A command
data value has
been adapted.
The Value Adapted Bit (VAB) is set true (1) whenever a data value in
a command is adapted to the nearest legal value. For instance, the
VAB bit would be set if the timebase is redefined as 2.5 µs/div
since the adapted value is 2 µs/div.
1 2 DIO1 Reserved.
0 1 INB An enabled
internal state
change
occurred.
The Internal State Bit (INB) is set true (1) whenever certain enabled
internal states are entered. For further information, refer to the INR?
query.
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