We use the B5-lite to support our student housing links… We have never had an issue with the links or their performance. In particular I have 2 links that are about the same distance as you are showing…300m.
I have a physical link of 867mb, and MAC speed of 520 both ways.
I am using 1x80 channel width.
Really, for all of our installs for the B5-lites, we initially use the auto-everything to let the device get the connections going initially on its own. We then do a monitoring of the radio to make sure we didn’t land in a populated or noisy channel. Once we’re happy with that, we simply change the channels to be static, taking off the auto-everything.
We leave the traffic split on auto, and so far we have not needed to change to specifically any other split.
On the Rate Adaptation, we found for our case that using EVM / Aggressive was the setting that gave us the best consistent rates.
We’ve have this particular location in place for over 2 years now with no issues whatsoever except when we had a firmware upgrade issue that required reloading multiple times before it would go cleanly.
Now — one other thing with ANY of the B5 series, is despite these being close, you still have to do an alignment.
I have a -34db signal between the radios, and other than VERY heavy rain (like the kind you can’t see across the street heavy), it’s never really moved at all.
I have found with these, and most other PTP 5ghz radios, JUST because you’re showing what appears to be a great connection initially, you MUST to a proper alignment. You can have a great visible connection when being off-center with the link because you’re so close it’s almost impossible to not get a good connection.
If you didn’t already do that, I would offer that you really should as it will make a difference. The beamwidth of the B5’s is only 8 deg, so there’s a huge room to miss your target, and with the proximity of these being at only 300m, it’s easy to get fooled by the reported numbers.
I hope some of this information helps solve your link rate to where it should be. Really, at that distance you should be showing a link that’s at or near the maximum 867mb depending on the bandwidth you chose.