Industry Forums > Wireless Service Providers > Rocket M5 AP DFS channels

Rocket M5 AP DFS channels

What version of firmware? There were many talks of false detections on some of the older firmware. The "skipping" is correct as that is what DFS enabled is suppose to do. If the radio detects someone else using that frequency it is suppose to change channels to avoid that interference be it a radar station or something else.

You can try and control the channels which the unit goes to by using the channel lists.

Don't I have to enable air select in order for DFS to detect or just by the plain fact of me choosing a DFS channel from the drop down frequency list under wireless settings it will change channels regardless if I have Air select checked or not..

Thanks

reply to viperm
DFS (Dynamic Frequency Selection) is in place to avoid radar signals that also use this frequency band. They are allowed to use these frequencies FIRST. So our radios that use these frequencies have to actively scan for radar, and move to a different channel if our radio thinks it sees radar, and we might interfere with them.

Air Select has nothing to do with it....

If you want to use this band, this is what you may or may not have to deal with. Depending on if the radio detects real or false radar. There is also a minimum wait time before transmissions to check for radar after a new channel has been selected. So your AP may pick a new channel, then wait a minute to scan for radar, see radar and repeat to a new channel, Etc., Etc..

Some have had good luck with UBNT radio's not false detecting, others have not. It's supposed to pick up radar, not other RF sources, but that isn't always the case. You are also limited to a total EIRP of 30Db within 5.4Ghz. PtP or PtMP does NOT matter. So range is quite limited also if your are staying within the law. A hand full of miles or less.

Enable logging on your radio and you will see what it is doing and why FYI.
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reply to viperm
We have DFS now using Ubnt and its great for us!
Only using for 2-3 miles to offload some 2.4 stuff that was
LOS and its never hopped on us.
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OptionsDSL Wireless Internet
»www.optionsdsl.ca

I wouldn't try more than 3 miles with UNII-2 because of the 30 dBm limitation for both sides of the link.

reply to viperm
I tried it once in this last BETA string and it hopped the first day with no radar around this quite isolated location with NSM5's that were pointed almost straight up and down.. So I turned it off and went back to the upper band.

We do plan on trying it again in the near future
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I have half a dozen AP's on the DFS channels. I haven't had them jump more than once or twice. I select a "range" of frequencies the AP can use and let it work within that range.

I use the DFS frequencies with short PTP shots and it works fantastic!

reply to viperm
This was a short PtP at about 300' with TX power turned all the way down on both radios.

Some claim that if there is too much interference that it will trip the radar detection. Something sure seemed to freak out our radios in a hurry once we tried DFS. There is no way there is radar in this town of 400 people. Nor anything in the direction of the two radios facing almost + and - 60 degrees up or down
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»www.wirelessdatanet.net

reply to viperm
It's not just TDWR you have to worry about. There are undisclosed military radar's as well.

But yes, Those two are my closest airport TDWR
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