Keysight M9421A - Page 838

3 WLAN Mode
3.6 Modulation Analysis Measurement
Index: n Results Returned
31 Unused Tone Error
Note that these results are available only if radio standard is 802.11ax and the PPDU format is HE trigger-
based, or radio standard is 802.11be and the PPDU format is EHT trigger-based
The returned results are unused tone results
1.
Fail indicator
2.
Active RU index
3.
Unused tone Error(dB) of RU0
4.
Limit(dB) of RU0
5.
Margin(dB) of RU0
6.
Unused tone Error(dB) of RU1
7.
Limit(dB) of RU1
8.
Margin(dB) of RU1
…
The total number of results = 3 * Number of Rus + 2
32 HE-SIG-B / EHT-SIG channel 1 contents
NOTE
The results will not be available unless radio standard is 802.11ax/be
For 802.11ax
It will return HE-SIG-B contents for channel 1 which is defined by 11ax specification
The returned values are float, each float number represents one bit ( i.e., 1.0 means bit 1 and 0.0 means bit
0)
The format of the returned values are:
Radio
Standard
Returned Values
11ax 20 M or
11ax 40M
RU1-242(8 bits), CRC(4 bits), Tail(6 bits), HE-SIG-B user field ( bits are variable
depending on the number of users)
11ax 80 M RU1-242(8 bits), RU3-242(8 bits), Center 26-tone RU (1 bit), CRC(4 bits), Tail(6 bits),
HE-SIG-B user field ( bits are variable depending on the number of users)
11ax 160 M
or
11ax 80+80
M
RU1-242(8 bits), RU3-242(8 bits), RU5-242(8 bits), RU7-242(8 bits),Center 26-tone
RU (1 bit), CRC(4 bits), Tail(6 bits), HE-SIG-B user field ( bits are variable depending
on the number of users)
The definitions of RU1, RU3, RU5 and RU7 refer to 802.11ax specification HE-SIG-B part
For 802.11be
WLAN Mode User's &Programmer's Reference 838