Hello, can somebody help me to understand how to read this spectrum analizer and what will be the best channel to connect the link, it seems to be well aligned but i am getting poor performance on downlink, I know that this is a very crowded environment but I need to acchieve 50/50mbps in a 6.6 KM link., I an getting better results with force200, but as I understand Force 300 it may have better performance.
If there is someone who can Also explain why do I have to chose that specific channel like a small description about colors and relations between bars,etc...
You may also want to try a couple ePMP2000 LITE Access Points set to ePTP mode. The ePMP2000 has filters which block out nearby channel noise, and I've had situations where that is dramatic. Plus, they have ePTP mode (which Force300's don't) and in my experience, those two things can make all the difference in the world.
That won't necessarly help if you just can't find anything relatively clear of on-channel noise, but I've had cases where I've replaced 1000s with 2000s (same antennas, same aiming, same settings, identical everything except the ePMP2000's filter) and gone from a link which was performing on a lower MCS, and the ePMP2000 jumped to a MCS15/15 rock steady with 2-3 ms latency.
The other good thing about trying an ePMP2000 would be that you could change one side at a time. They can be programmed identical to the Force200's you have now, so that would be a simple thing to try (compared to a PTP solution - which would be more of a repacement).
In your case, since you'd be replacing the smaller Force200's antenna, going to an ePMP2000 AP would also allow you to choose a larger dish (depending on mounting) which could get a tighter beam, hear less interference, and increase signals. And - it would only be a couple/few hundred dollars more than the Force200's your pulling out... so well worth the a try.
Actually - in the PTP link to my Acreage, I only replaced the tower side (the noisier side) and I still have a Force200 on the roof of my house. So on that one side, it was only a couple hundred dollar upgrade to replace the Force200 with the ePMP2000 and it not only dramatically helped that link, but it also helped not generate more nearby channel noise on our tower for other links there.
Hello, about this approach, I have some ePMP 2000 full with sector and smart beam forming antenas do you think that i can use this devices? If so which kind of antenna do you think I may have to use? Should I change the antenna for a conectorized dish?
@NetBrowser wrote: Hello, about this approach, I have some ePMP 2000 full with sector and smart beam forming antenas do you think that i can use this devices? If so which kind of antenna do you think I may have to use? Should I change the antenna for a conectorized dish?
Hi. Well, in a PTP situation, you'll want dish antennas for those ePMP2000's. The reason I recommended LITE versions is they are about half the price and the difference is simply in the license. The LITE versions connect up to 10 clients maximum (and of course you only need 1 for ePTP mode) and the FULL version are the same hardware, just licensed for more connections. But, if you want to give this a try, you certainly can use your FULL versions for now as an ePTP test and and then if that works out, you could swap them for cheaper LITE version I suppose.
So yeah, for antennas you'll want to get the highest gain, tightest beam dishes you can. 2' of 3' dishes will be more gain than the Force200 or Force300 antennas, with not only more gain and more signal, but also less interference generated or received. You can also mix/match - we have places where one side can support a 3' dish, while the other side can only have a 2' dish, and that's fine too. However, yes for sure - if you can swap out the sector/beamsteer for a simple 2' dish, that'll be better - higher gain and more interference rejection. They are trickier to aim long distance - so it's good if you know exactly where your target is.
NOW - all that being said, your original plan of Force300's can certainly provide lots of thoughput. If you've got clear enough spectrum and strong enough signals, they really scream. Here's a PTP backhaul link I have up with Force300's and it'll do over 315 Mbit in a 40 Mhz wide channel. BUT, if you don't have clear spectrum, or if you can't get enough signal with Force300's - then ePMP2000's with larger dishes may be a good solution.
