3 WLAN Mode
3.6 Modulation Analysis Measurement
–
HE trigger-based PPDU format is used for a PPDU that is a response of a Trigger
frame, if FORMAT=HE_TRIG. The preamble format is identical to the HE SU
PPDU format until the HE-STF field
More Information about EHT PPDU
EHT PPDU has two formats.
–
EHT MU PPDU format is used for transmission to one or more users if the PPDU
is not a response to a triggering frame. In the EHT MU PPDU, the EHT-SIG field
is present. It’s used for non-OFDMA or OFDMA single or multiuser transmission
–
EHT TB PPDU format is used for a transmission that is a response to a triggering
frame from an AP. In the EHT TB PPDU, the EHT-SIG field is not present and the
duration of the EHT-STF field is twice the duration of the EHT-STF field in the
EHT MU PPDU
DCM of Trigger-based PPDU
This is available only when Radio Std is 802.11ax/11be.
DCM (Dual sub-Carrier Modulation) information is defined in Trigger Frame,
applicable only to MCS 0,1,3,4.
Trigger-based PPDU format is used for a PPDU that is a response of a Trigger frame,
which does not include DCM information. You need to manually set the DCM
information to select EVM limit for your test.
See More Information about HE PPDU.
Remote Command
:CALCulate:EVM:TBASed:DCM ON | OFF | 1 | 0
:CALCulate:EVM:TBASed:DCM?
Example
:CALC:EVM:TBAS:DCM ON
:CALC:EVM:TBAS:DCM?
Notes Only available when Radio Std is 802.11ax/11be
Preset Off
State Saved Saved in instrument state
Range On|Off
Backwards Compatibility
SCPI
:CALCulate:EVM:AX:TBASed:DCM ON | OFF | 1 | 0
:CALCulate:EVM:AX:TBASed:DCM?
Max Power of MCS7
This is available only when Radio Std is 802.11ax/11be.
This parameter is used to select the EVM limit.
WLAN Mode User's &Programmer's Reference 1064
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