R600 unleashed 5ghz 40mhz channels

[samuellsk]

We have an unleashed network with 6 r600 in one of our old locations.

Wanted to ask how does the 5ghz 40mhz chanelization work ?

I ll select the 40mhz channelization and select channel for example 36 on one of the APs as override and thats it ? 
and it will use 36 + 40 channel frequencies ? (5180 + 5200) ?

If so if i choose 40 channel + 40mhz channelization , does it take still 5180 + 5200 , or 5200 + 5220 frequencies ? It is important for me to know frequencies cause we are using mikrotik in our robots as client and have manualy defined frequencies,

[Squozen]

https://en.wikipedia.org/wiki/List_of_WLAN_channels#5_GHz_(802.11a/h/n/ac/ax/be)