CALCulate Subsystem R&S FSL
1300.2519.12 6.74 E-11
Characteristics
*RST value: –
SCPI: device–specific
Mode
A
CALCulate<1|2>:MARKer<1...4>:FUNCtion:MDEPth[:STATe]
This command switches on the measurement of the AM modulation depth. An AM–modulated
carrier is required on the screen for correct operation. If necessary, marker 1 is previously
activated and set to the largest signal available.
The level value of marker 1 is regarded as the carrier level. On activating the function, marker 2
and marker 3 are automatically set as delta markers symmetrically to the carrier to the adjacent
maxima of the trace.
If the position of delta marker 2 is changed, delta marker 3 is moved symmetrically with respect
to the reference marker (marker 1). If the position of delta marker 3 is changed, fine adjustment
can be performed independently of delta marker 2.
The power at the marker positions is calculated from the measured levels.
The AM modulation depth is calculated from the ratio of power values at the reference marker
and the delta markers. If the two AM sidebands differ in power, the average value of the two
power values is used for calculating the AM modulation depth.
The numeric suffix <1|2> and <1...4> are irrelevant for this command.
Example
CALC:MARK:X 10MHZ
Sets the reference marker (marker 1) to the carrier signal at 10 MHz.
CALC:MARK:FUNC:MDEP ON
Switches on the modulation depth measurement.
CALC:DELT2:X 10KHZ
Sets delta markers 2 and 3 to the signals at 10 kHz from the carrier signal.
CALC:DELT3:X 9.999KHZ
Corrects the position of delta marker 3 relative to delta marker 2.
Characteristics
*RST value: OFF
SCPI: device–specific
Mode
A
CALCulate<1|2>:MARKer<1...4>:FUNCtion:MDEPth:RESult?
This command queries the AM modulation depth.
A complete sweep with synchronization to sweep end must be performed between switching on
the function and querying the measured value to obtain a correct query result. This is only
possible in single sweep mode.
The numeric suffix <1|2> and <1...4> are irrelevant for this command.
This command is only a query and therefore has no *RST value.
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