It appears that ROS implements this with some idiosyncrasies in 5GHz when using Superchannel. If for instance you wanted to run MIMO with channel bonding on 4980MHz ROS appears to force you to use HT-Above even though 4980 is the top of the 4.9GHz band and it should use HT-Below. It appears to do this because channels in the low end of 5GHz (as documented in other posts) are not supposed to use HT-Below if it would lead them to block channels outside the normal IEEE channels. I assume that the same is true if I was to run above 5825MHz, that I could not use HT-Above.
Can I request an enhancement that when mode is set to superchannel (operating out of regulatory domain) that HT-Above and HT-Below be allowed for all channels, leaving it up to the user to comply with local regulations? It would make things a little easier to keep track of.
I have perfect working links in superchannel mode, 40MHz:
5905 with HT-above;
4885 with HT-below;
6060 with HT-below;
4830 with HT-above.
So what is your problem ? Just use “no country set”.
We are using no country set and superchannel. We are using 4.9GHz antennas. There is nothing else in the band, but when we use HT-Below on 4960 for example, we get throughput in the 30-40Mbps range. Using HT-Above we get 80-90Mbps. TCP throughput.
Change antennas to 5GHz and flip up to 5900 and the inverse is true (HT-Above fails but HT-Below works).
This is with an RB52Hn on 5.17. Maybe we should try an SR71a.
This is already done, when you use superchannel option it is up to you how you configure your wireless settings.
Also other user reported that is is working fine, so maybe you have some problem with the antenna configuration, maybe they are not suitable for that frequency.
Not an antenna problem. We were seeing these results when running 20/40-HT-below on 4.9GHz freq using superchannel with no domain set. Switch to HT-Above an everything worked. We can only infer what was going on in the background. But definitely this was what we saw.