Keysight M9421A - Equalizer Training

3 WLAN Mode
3.7 WLAN MIMO Modulation Analysis Measurement
used to do demodulation.
NOTE
It is available when Subcarriers Selection is selected as Single.
Remote
Command
:CALCulate:EVMMimo:SUBCarrier:COUNt <integer>
:CALCulate:EVMMimo:SUBCarrier:COUNt
Example
:CALC:EVMM:SUBC:COUN 2
:CALC:EVMM:SUBC:COUN?
Preset 2
State Saved Saved in instrument state
Min/Max The following table defines the Min/Max values
Radio Min/Max
802.11n 20 MHz| 802.11ac 20 MHz -28/28
802.11n 40 MHz| 802.11ac 40 MHz|802.11af (6/7/8 MHz) -58/58
802.11ac 80MHz|802.11ac 80+80MHz -122/122
802.11ac 160 MHz -250/250
802.11ax/be 20 MHz -122/122
802.11ax/be 40 MHz -244/244
802.11ax/be 80MHz | 802.11ax 80+80MHz -500/500
802.11ax/be 160 MHz -1012/1012
802.11be 320 MHz -2036/2036
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 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. It
also typically lowers the EVM by between one and three dB.
Remote
Command
:CALCulate:EVMMimo:EQUalizer:TMODe SEQuence | SDATa
:CALCulate:EVMMimo:EQUalizer:TMODe?
Example
:CALC:EVMM:EQU:TMOD SDAT
1243 WLAN Mode User's &Programmer's Reference