Keysight Technologies InfiniiVision 3000T X Series - Message Queue

Status Reporting 39
Keysight InfiniiVision 3000T X-Series Oscilloscopes Programmer's Guide 1251
Message Queue
The message queue contains the text of the last message written to the advisory
line on the screen of the oscilloscope. The length of the oscilloscope's message
queue is 1. Note that messages sent with the :SYSTem:DSP command do not set
the MSG status bit in the Status Byte Register.