Keysight U2722A Programmer's Reference Manual page 125

IEEE-488.2 Common Commands 13
Returned Query Format
<NR1>
The command will return "1" to the output buffer.
Example
The following command reads the condition register (bits 3 and 4 are set).
*STB?
Typical Response: +24
See Also
*CLS
Keysight U2722A/U2723A Programmer's Reference 125