We had the exact same results. Bare SM worked better than reflector through trees. And it actually worked pretty good, got about 24x7Mbps linktests. That was until the trees started blowing in the wind, linktests were all over the place. Then it got worse, the trees got wet and the test SMs we had on the sector both dropped session 10-20 times per day and linktests dropped down to 3-5Mbps a lot. The power level dropped maybe 3-6dB, but the multipath increased a lot which is what hurt the most. The 450 definitely handles multipath better than FSK, but obviously nowhere near as well as a platform designed to take advantage of it. Maybe 5ms framing would help, but we tore that test sector down before it came around.

This is why I keep asking Cambium to make an integrated panel SM for 3GHz. More gain than a bare SM and not as narrow as a reflector.

We just did a 5.5 mile 3.6 450 SM on a 2' dish today. Can't see the tower at all, no trees up close, but it's getting -73 and solid 6X. Doing 30Mbps down, 9Mbps up. I'm surprised. But like Ken always says, that's just because of the low noise floor.

On 6/4/2015 10:27 AM, Paul McCall wrote:

On the SM side, we did not try connectorized 3.65 450 SMs.

In our past experience with 320s, the SMCs used with a KP Performance 3.65 feedhorn reflector got less results at times for NLOS shots then a standard SM. It was explained to me that is because it’s not a “need more power, burn through trees issue”… it’s a “don’t narrow the beam so much than the wimax can’t work around the tree elements” issue.

Our testing exposure was rather limited and we stopped when others on the list confirmed they had similar results.

*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Ben Royer
*Sent:* Thursday, June 04, 2015 11:18 AM
*To:* af@afmug.com
*Subject:* Re: [AFMUG] 320 series - still using

Paul,

Thanks for the response. More specifically I’m interested in the SM side of the test, as we too are using the Cambium Antennas at the AP. However, at the SM side, I’d recommend a NLOS test using a connectorized radio with a higher gain antenna. We’ve seen some initial NLOS tests where 450 out performs the 320.

Thank you,
Ben Royer, Operations Manager
Royell Communications, Inc.
217-965-3699 www.royell.net <http://www.royell.net>

*From:*Paul McCall <mailto:pa...@pdmnet.net>

*Sent:*Thursday, June 04, 2015 8:30 AM

*To:*af@afmug.com <mailto:af@afmug.com>

*Subject:*Re: [AFMUG] 320 series - still using

Ben,

The testing was based on using the standard Cambium antenna, respectively, for both platforms.

Paul

*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Ben Royer
*Sent:* Thursday, June 04, 2015 9:11 AM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] 320 series - still using

What antenna are you using in your testing of the 450 vs. 320 NLOS? I’m just curious because this is an interesting report, as we have a network of around 2,500 320 customers, and we are in the same position of looking for that next great thing.

Thank you,
Ben Royer, Operations Manager
Royell Communications, Inc.
217-965-3699 www.royell.net <http://www.royell.net>

*From:*Paul McCall <mailto:pa...@pdmnet.net>

*Sent:*Wednesday, June 03, 2015 4:40 PM

*To:*af@afmug.com <mailto:af@afmug.com>

*Subject:*Re: [AFMUG] 320 series - still using

But, if you are using 320 for NLOS solutions, the 450 trade up means you’re going to lose customers since the 450 doesn’t do nearly as good a job as the 320

Paul

*From:*Af [mailto:af-boun...@afmug.com] *On Behalf Of *Ken Hohhof
*Sent:* Wednesday, June 03, 2015 5:37 PM
*To:* af@afmug.com <mailto:af@afmug.com>
*Subject:* Re: [AFMUG] 320 series - still using

Don’t they have another WiMAX-to-450 tradeup going on? Kind of a 3650 MHz cash-for-clunkers program.

*From:*That One Guy /sarcasm <mailto:thatoneguyst...@gmail.com>

*Sent:*Wednesday, June 03, 2015 4:08 PM

*To:*af@afmug.com <mailto:af@afmug.com>

*Subject:*Re: [AFMUG] 320 series - still using

Im stuck with it. We bought an overstock load of APs and SMs. We have a dream of Telrad working out to save the day with their firmware load. Some creative Telrad AP deployments gradually replacing the 320 APs, utilizing the 320 CPEs until we migrate the site to LTE with telrad CPEs, giving us 320 CPEs to redeploy.

The dream is somebody will write some magic code to sit on an intermediary server to communicate with the FCC database thing so we can redeploy the 320 APs to small sites.

We had two test sites for the 450. One site landlord hasnt allowed us up there to swap equipment, we have to deal with that on the lease side and our other 450 test site has only 3 users on it with good links so we havent been able to test the 1x magic out.

I would have preferred to more aggressively pursue the 450 and be able to sell higher throughput higher dollar connections, to offset the potential nlos customers we would lose. something about being able to sync with competitors down the road seemed like a good idea to me, especially with an AP with 3x the throughput and the whole not using gear thats end of life, but i am but a lowly sysadmin with no access to the purse strings.

On Wed, Jun 3, 2015 at 3:26 PM, Paul McCall <pa...@pdmnet.net <mailto:pa...@pdmnet.net>> wrote:

I am just curious how many of you have decided to keep using the 320 series because it goes through trees a lot better than the 450 series 3.65 product?

Are you expanding with it as far as towers go? Or, are you just adding SMs to what you already have?

Paul

Paul McCall, Pres.

PDMNet / Florida Broadband

658 Old Dixie Highway

Vero Beach, FL 32962

772-564-6800 <tel:772-564-6800> office

772-473-0352 <tel:772-473-0352> cell

www.pdmnet.com <http://www.pdmnet.com/>

pa...@pdmnet.net <mailto:pa...@pdmnet.net>



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