Technical data

Status Reporting 6
Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference 117
Message Queue
The message queue contains the text of the last message written to the
advisory line on the screen of the oscilloscope. The queue is read with the
:SYSTEM:DSP? query. Note that messages sent with the :SYSTEM:DSP
command do not set the MSG status bit in the Status Byte Register.