Anritsu MS9740A - Calculate:marker[1|2|3|4]:Y; Calculate:marker:zone:erace; Calculate:marker:zone:span

3.4 Device Message Details
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Message Details
:CALCulate:MARKer[1|2|3|4]:Y?
Function
This command queries the level of the trace marker.
When the level scale is displayed in units of percentage (%), the trace
marker level cannot be queried.
Syntax
:CALCulate:MARKer[1|2|3|4]:Y?
The process will not change regardless of whether a number [1|2|3|4] is
specified or omitted.
Response Data
<numeric>: Level of the trace marker (dB|dBm|W)
Example of Use
To query the trace marker level (dB|dBm) when displayed in a log scale.
:CALCulate:MARKer:Y?
>-4.28000000E+000
To query the trace marker level (W) when displayed in a linear scale.
:CALCulate:MARKer:Y?
>+3.72900000E-004
:CALCulate:MARKer:ZONE:ERACe
Function
This command erases the zone marker display.
Syntax
:CALCulate:MARKer:ZONE:ERACe
:CALCulate:MARKer:ZONE:SPAN
Function
This command sets the wavelength width of the zone marker to the
sweep width.
Syntax
:CALCulate:MARKer:ZONE:SPAN