Keysight Technologies N9321C User Manual page 151

Key Reference
MODE
Data->Mem
This softkey is used to store the active data trace into memory. The
trace in memory will be refreshed in the next sweep once you press
this softkey. There are three trace refresh mode for your selection:
Data
Only the activated trace is viewable. The trace memory is
not viewable.
Memory
Only the trace in memory is viewable.
Data&Memory
The trace both activated and in memory is
viewable.
Key access: Trace > Data->Mem
Disp Mode
This softkey allows you to set the Y axis of the graticule as return
loss, VSWR or reflection coefficient value.
Key access: Meas > Disp Mode
IIM On/Off
This softkey toggles IIM between on and off. When there is a need
to measure the antenna feed line in field, there are probably some
interference signals coupled into the device, which will be detected
as spurs in the measurement result. When IIM is set to on, the
analyzer will compensate those spurs by IIM algorithm.
Key access: Meas > IIM
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