R&S FSMR, Operating Manual

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CALCulate Subsystem R&S FSMR
1313.9723.12 6.1-54 E-1
CALCulate<1|2>:MARKer<1 to 4>:FUNCtion:NDBDown <numeric_value>
This command defines the level spacing of the two delta markers to the right and left of marker 1 in
the selected measurement window. Marker 1 is always used as the reference marker. The numeric
suffix <1 to 4> is irrelevant for this command.
The temporary markers T1 and T2 are positioned by n dB below the active reference marker. The
frequency spacing of these markers can be queried with
CALCulate:MARKer:FUNCtion:
NDBDown:RESult
?.
Example: "
CALC:MARK:FUNC:NDBD 3dB"
'Sets the level spacing in screen A to 3 dB.
Characteristics: *RST value: 6dB
SCPI: device-specific
CALCulate<1|2>:MARKer<1 to 4>:FUNCtion:NDBDown:FREQuency?
This command queries the two frequencies of the N-dB-down marker in the selected measurement
window. The numeric suffix <1 to 4> is irrelevant for this command. The two frequency values are
separated by comma and output in ascending order.
A complete sweep with synchronization to sweep end must be performed between switching on the
function and querying the measured value to obtain a valid query result. This is only possible in single
sweep mode.
Example:
"INIT:CONT OFF"
'Switches to single-sweep mode.
"CALC:MARK:FUNC:NDBD ON"
'Switches on the n-dB-down function in
'screen A.
"INIT;*WAI"
'Starts a sweep and waits for the end.
"CALC:MARK:FUNC:NDBD:FREQ?"
'Outputs the frequencies of the temporary
'markers in screen A.
Characteristics: *RST value: -
SCPI: device-specific
This command is only a query and therefore has no *RST value.
CALCulate<1|2>:MARKer<1 to 4>:FUNCtion:NDBDown:RESult?
This command queries the frequency spacing (bandwidth) of the N-dB-down markers in the selected
measurement window. The numeric suffix <1 to 4> is irrelevant for this command.
A complete sweep with synchronization to sweep end must be performed between switching on the
function and querying the measured value in order to obtain a valid query result. This is only possible
in single sweep mode.
This command is not available for GSM/EDGE measurements modulation accuracy
(MAC), phase/frequency error (PFE) and power versus time (PVT).
Example:
"INIT:CONT OFF"
'Switches to single-sweep mode.
"CALC:MARK:FUNC:NDBD ON"
'Switches on the n-dB-down function in
'screen A.
"INIT;*WAI"
'Starts a sweep and waits for the end.
"CALC:MARK:FUNC:NDBD:RES?"
'Outputs the measured value of screen A.
Characteristics: *RST value: -
SCPI: device-specific
This command is only a query and therefore has no *RST value.