Anritsu MS2840A - :READ:SEMask[n]?; :MEASure:SEMask[n]?

Chapter 2 SCPI Device Message Details
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:READ:SEMask[n]?
Spectrum Emission Mask Read
Function
This command outputs Spectrum Emission Mask measurement and
outputs the measurement result.
It achieves the same result as when commands are sent in the order of
:INITiate:SEMask
:FETCh:SEMask[n]?
:MEASure:SEMask[n]?
Spectrum Emission Mask Measure
Function
This command performs Spectrum Emission Mask measurement and
outputs the measurement result.
It achieves the same result as when commands are sent in the order of
:CONFigure:SEMask
:INITiate:SEMask
:FETCh:SEMask[n]?