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Chapter 4 Remote Interface Reference
The SCPI Status System
4
The Status Byte Register
The Status Byte summary register reports conditions from the other
status registers. Data that is waiting in the function generator’s output
buffer is immediately reported on the “Message Available” bit (bit 4).
Clearing an event register from one of the other register groups will clear
the corresponding bits in the Status Byte condition register. Reading all
messages from the output buffer, including any pending queries, will
clear the “Message Available” bit. To set the enable register mask and
generate an SRQ (service request), you must write a decimal value to the
register using the *SRE command.
Bit Definitions – Status Byte Register
Bit Number
Decimal
Value Definition
0 Not Used
1 Not Used
2 Error Queue
3 Questionable Data
4 Message Available
5 Standard Event
6Master Summary
7 Not Used
1
2
4
8
16
32
64
128
Not Used. Returns “0”.
Not Used. Returns “0”.
One or more errors are stored in the
Error Queue.
One or more bits are set in the Questionable
Data Register (bits must be enabled).
Data is available in the instrument’s output buffer.
One or more bits are set in the Standard Event
Register (bits must be enabled).
One or more bits are set in the Status Byte
Register (bits must be enabled).
Not Used. Returns “0”.
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