Keysight M9421A - Equalizer Training

3 WLAN Mode
3.9 Spectral Flatness Measurement
A value of Short means to search for and synchronize to an 802.11a preamble short
symbol sequence. Short value should not be used for 802.11g DSSS-OFDM,
because the DSSS-OFDM preamble does not contain the short symbol sequence.
A value of Long means to search for and synchronize to an 802.11a/g preamble
long symbol sequence (also called the channel estimation sequence).
NOTE
Available when Radio Std is 802.11a/g/j/p OFDM.
Remote Command
[:SENSe]:FLATness:STSequence LONG | SHORt
[:SENSe]:FLATness:STSequence?
Example
:FLAT:STS LONG
:FLAT:STS?
Preset SHORt
State Saved Saved in instrument state.
Range Long | Short
Equalizer Training
This specifies how the equalizer is initialized, or “trained”. The valid values are
Channel Estimation Seq Only and Channel Estimation Seq & Data. The value
Channel Estimation Seq Only, which is the default, specifies that the equalizer is
trained using only the channel estimation sequence (also called the “long sync”)
portion of the burst preamble. The 802.11a/g/n standards imply that the equalizer
should be implemented this way when measuring EVM, and this matches how a real
receiver would probably implement an equalizer.
The value and Channel Estimation Seq & Data specifies that the equalizer should be
trained using both the channel estimation sequence and the entire data portion of
the burst. This usually gives a more accurate estimate of the equalizer response.
Remote
Command
:CALCulate:FLATness:EQUalizer:TMODe SEQuence | SDATa
:CALCulate:FLATness:EQUalizer:TMODe?
Example
:CALC:FLAT:EQU:TMOD SDAT
:CALC:FLAT:EQU:TMOD?
Preset SEQ
State Saved Saved in instrument state
Range Channel Estimation Sequence Only | Channel Estimation Sequence&Data
WLAN Mode User's &Programmer's Reference 1492