Keysight 81150A - Status Byte Register

Remote Programming Reference
81150A and 81160A User’s Guide 579
4.7.2 Status Byte Register
Introduction
The Status Byte summary register reports conditions from the other status
registers. Data that is waiting in the instrument’s output buffer is
immediately reported on the “Message Available” bit (bit 4) for example.
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. Returns “0”
1 Not used
2
Not Used. Returns “0”
2 Error Queue
4
One or more error are stored in the Error Queue
3 Questionable Data
8
One or more bits are set in the Questionable Data
Register (bits must be enabled)
4 Message Available
16
Data is available in the instrument’s output buffer
5 Standard Event
32
One or more bits are set in the Standard Event
Register
6 Master Summary
64
One or more bits are set in the Status Byte Register
7 Not Used
128
One or more bits set in the Operation Data Register