3 WLAN Mode
3.7 WLAN MIMO Modulation Analysis Measurement
Notes The accuracy of the IQ gain imbalance and quadrature error estimation is affected by the receiver’s
ability to determine the correct ideal reference constellation points for each symbol in the modulated
signal. Large IQ impairments may result in incorrect determination of reference points, which will lead
to incorrect estimates for the IQ errors. Generally, the receiver can provide correct IQ estimation with
greater levels of IQ impairment for lower-order modulation such as QPSK than for higher-order
modulation such as 64QAM
Preset OFF
State Saved Saved in instrument state
Range On|Off
I/Q Compensation
This parameter allows to turn On or Off the compensation for IQ Gain Imbalance, IQ
Quadrature Error, and IQ Timing Skew found in the input signal.
If it is On, what the exact compensation functions are executed depends on the state
of Explicit IQ Compensation: IQ Gain Imbalance, IQ Quadrature Error, IQ Timing
Skew.
If it is Off, the compensation function will be bypassed.
Remote
Command
[:SENSe]:EVMMimo:COMPensate OFF | ON | 0 | 1
[:SENSe]:EVMMimo:COMPensate?
Example
:EVMM:COMP ON
:EVMM:COMP?
Notes If I/Q Compensation is On, what the exact compensation functions are executed depends on the state of
Explicit IQ Compensation: IQ Gain Imbalance, IQ Quadrature Error, IQ Timing Skew
If I/Q Compensation is Off, the compensation function will be bypassed although IQ Compensation: IQ
Gain Imbalance, IQ Quadrature Error, IQ Timing Skew are all On
Preset OFF
State Saved Saved in instrument state
Range On | Off
I/Q Gain Imbalance
This parameter allows to turn On or Off the compensation for IQ Gain Imbalance
found in the input signal.
If On, the IQ Gain imbalance in the signal will be compensated.
If Off, the IQ Gain Imbalance compensation will be bypassed.
Remote
Command
:CALCulate:EVMMimo:COMPensate:GAIN[:STATe] OFF | ON | 0 | 1
1249 WLAN Mode User's &Programmer's Reference
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