Agilent Technologies Signal Analyzer N9030a - Manual (Page 134)

3 Programming the Analyzer
STATus Subsystem
The Status Byte Register
The RQS bit is read and reset by a serial poll. The same bit position (MSS) is read, non-
destructively by the *STB? command. If you serial poll bit 6 it is read as RQS, but if you send
*STB it reads bit 6 as MSS. For more information refer to IEEE 488.2 standards, section 11.
134 Remote Language Compatibility Measurement Application Reference