Agilent Technologies Signal Analyzer N9030a - Manual (Page 366)

5 Legacy Command Descriptions
M2 [two] (Marker Normal)
Query Data Type <real>. See "MKF (Marker Frequency)" on page 387 .
SCPI Equivalent Commands :CALCulate:MARKer[1]|2:X <freq|time>
:CALCulate:MARKer:MODE POSition
(See "Marker" on page 667 )
Notes The functions of M2 are identical to "MKN (Marker Normal)" on page 393 .
If the active marker has not been declared with "MKACT (Activate Marker)" on page 382 , a
Normal marker is turned on and this active marker is assumed to be marker number 1.
366 Remote Language Compatibility Measurement Application Reference