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NanoStation M3 frequencies

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zl4dk's picture
NanoStation M3 frequencies

I'm tempted to get a couple of nanostation M3s to play with and see how they perform. However I'm concerned that the ZL 3.3GHz ham band may be a limitation for these. Ubiquiti states that they run from 3400 to 3700 whereas our band only goes up to 3410 (with 3400 to 3410 is reserved for satellites, 3399-3400 reserved for Narrowband use and 3395-3399 reserved for repeaters ). The Aredn webpages suggest that frequencies down to 3380 are usable but I am not sure if this includes the nanostation.
So my Question is what bandwidth can I use if I want to remain below 3395, is it 30MHz centred on 3380?
I'm thinking that if I'm going to buy some Ubiquiti hardware for AREDN I might as well go to 3.3 or perhaps 5GHz and leave my 2.4GHz gear on bbhn. I seem to have a reliable DTD link working between a Airgrid and a WRT54GL and assume I could run this link between AREDN and bbhn.

David ZL4DK
So as I recall this was
So as I recall this was mostly tested with Rockets which claim to be good to 3300.
​That said when testing I saw a rolloff going down below 3400,  3380 was the arbitrary number where the drop looked to become significant and linearity become a concern and that we should not permit it any further.  I'm honestly not sure how many networks have tried to push these lower end links. I've tried to stay above 3400 because of the rolloff on power output.
This honestly made me think that even the rockets really were not intended to 3300, but it could just be I stopped testing when I saw the rolloff and it might of picked up lower in the band.
I would suggest 3385 at 10Mmhz or 3385+3390 at 5Mhz.  You certainly could try 3385(or 3380) at 20Mhz (we don't have a 30MHz) and be next to 3395 for the primary signals (there is of course roll off side bands like any modulation so make sure those won't interfere).
Concerns with going wide at this law are the wider you are the less linear the signal will across the entire bandwidth of the signal, is it enough to cause problems, I can't say for certain as I didn't test the wide modes at distance, and no one here had an IQ Constellation Analyzer for 3.4 GHz.
​As noted by WU2S I incorrectly wrote 39** instead of 33** on entries above, corrected for future readers.
WU2S's picture
3380 not 3980?
I think you meant 3380
NSM3 on 3380
We're operating 2 NSM3's on 3380 with no problems.

My local mesh is using Rocket M3 and NanoStation M3 on 3485 (ch97) at 20mhz wide.  We have about a half-dozen nodes up in the greater Turlock/Mariposa area of SJV.

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