802.11ac channel segment calculation

Seg0 = center frequency channel
Seg0 = (primary channel number) + (((bandwidth / 2) - 10) / 5)
* ( bandwidth / 2 ) = look up center
* ( -10 ) = 20MHz channel center is 10Mhz above
* ( /5 ) = 1 channel width is 5Mhz

Ch36 40MHz Seg0 = 36 + (((40 / 2) - 10) / 5) = 38 (36 + 2)
Ch36 80MHz Seg0 = 36 + (((80 / 2) - 10) / 5) = 42 (36 + 6)
Ch36 160MHz Seg0 = 36 + (((160 / 2) - 10) / 5) = 50 (36 + 14)

dot11CurrentChannelWidth
Channel width. Possible values represent 20 MHz, 40 MHz,
80 MHz, 160 MHz, and 80+80 MHz channels.

dot11CurrentChannelCenterFrequencyIndex0
For a 20 MHz, 40 MHz, 80 MHz, or 160 MHz channel, denotes
the channel center frequency.
For an 80+80 MHz channel, denotes the center frequency of the
frequency segment 0, which is the frequency segment containing
the primary channel.
Valid range is 1 to 200.
See Equation (22-102).

dot11CurrentChannelCenterFrequencyIndex1
For an 80+80 MHz channel, denotes the center frequency of the
frequency segment 1, which is the frequency segment that does
not contain the primary channel.
Valid range is 1 to 200.
See Equation (22-102).
For a 20 MHz, 40 MHz, 80 MHz, or 160 MHz channel, set to 0.

dot11CurrentPrimaryChannel
Denotes the location of the primary 20 MHz channel.
Valid range is 1 to 200.
See Equation (22-103).

22-103:
Primary 20 MHz channel center frequency [MHz]
= Channel starting frequency + 5 x dot11CurrentPrimaryChannel
ex) channel 36: 5000MHz + 5 x 36 = 5180Mhz
dot11CurrentPrimaryChannel = (5180 - 5000) / 5 = 36

22-102:
VHT80 Channel 36 center frequency = 5000 + 5 x 36 = 5180Mhz
* Ch36 80MHz Seg0 = 36 + (((80 / 2) - 10) / 5) = 42 (36 + 6)
Channel center frequency [MHz]
= Channel starting frequency + 5 x dot11CurrentChannelCenterFrequencyIndex
Channel center frequency [MHz] = 5000 + 5 x 42 = 5210MHz
dot11CurrentChannelCenterFrequencyIndex = dot11CurrentChannelCenterFrequencyIndex0 = 42

dot11CurrentChannelCenterFrequencyIndex is either dot11CurrentChannelCenterFrequencyIndex0 or
dot11CurrentChannelCenterFrequencyIndex1