3 VMA Mode
3.1 Digital Demod Measurement
Normalize RMS
Scales the magnitude of the constellation states to have a unitless RMS of 1. This
assumes all constellation states have equal probability.
Validate
Checks the current constellation definition for validity and enables the OKbutton. It
will also calculate Mag RMS and Symmetry based on current constellation.
Mag RMS calculation assumes equally probable constellation states.
Symmetry means angle in degrees by which constellation can be rotated to achieve
an equivalent constellation.
User-Defined Filter Coefficient
Enables you to edit the user-defined filter’s coefficient. Only available when the
meas or ref filter is user-defined.
User-Defined Meas Filter Coefficient List Data (Remote Command Only)
Defines a list of coefficient values for a user-defined measure filter. Up to 1000
points may be defined using the following parameters.
Remote
Command
:CALCulate:DDEMod:SEGMent1|…|6:FILTer:COEFficient:MEASure[:DATA] <real>,
<real>, …
:CALCulate:DDEMod:SEGMent1|…|6:FILTer:COEFficient:MEASure[:DATA]?
Example
:CALC:DDEM:SEGM1:FILT:COEF:MEAS -0.1124, -0.1545, -0.2458, -0.325
:CALC:DDEM:SEGM1:FILT:COEF:MEAS?
Preset Unaffected by Preset
State Saved Saved in instrument state
Backwards
Compatibility
SCPI
:CALCulate:FILTer:COEFficient:MEASure[:DATA]
User-Defined Ref Filter Coefficient List Data (Remote Command Only)
Defines a list of coefficient values for a user-defined reference filter. Up to 1000
points may be defined using the following parameters.
Remote
:CALCulate:DDEMod:SEGMent1|…|6:FILTer:COEFficient:REFerence[:DATA] <real>,
361 Vector Modulation Analyzer Mode User's &Programmer's Reference
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