I know it is actually gained, but that doesn't seem to help in long range shots. I've gotten much better results with MIMO on short range, but not terribly impressive on long range shots with a clear fresnel zone.
I replaced an old 4 mile link, MT R52 5GHz with a 26dBi grid on each end, with a NBM5 and lost around 6dB. Speed is much better than my old 54Mb link, but signal is actually worse. Just trying to wrap my head around the numbers since the math and the real world don't agree on the NBM5. I'm not knocking the hardware, I'm installing more constantly, but for the long shots I need the actual numbers. ----- Original Message ----- From: Jon Langeler To: [email protected] Sent: Thursday, May 07, 2015 9:10 PM Subject: Re: [AFMUG] Nanobridge M5 you 'gain' 3db when signal combining..MIMO-A as some word. Cambium 450 and WiMAX does that Sent from my iPhone On May 7, 2015, at 9:53 PM, Glen Waldrop <[email protected]> wrote: Also, doing the math and removing 3dB tx power and 3dB rx gain and the numbers are within a couple dB to the math. ----- Original Message ----- From: Glen Waldrop To: [email protected] Sent: Thursday, May 07, 2015 8:51 PM Subject: Re: [AFMUG] Nanobridge M5 I thought so as well. Could be he's talking about the gain being +3dB on the data sheets assuming for the gain due to MIMO. At 12 miles I get a -71. The math shows -61. Most of my NBM5 links are similar. I get much better signal with my old 802.11a + PacWireless grids, usually right on the math. ----- Original Message ----- From: John Woodfield To: [email protected] Sent: Thursday, May 07, 2015 8:39 PM Subject: Re: [AFMUG] Nanobridge M5 I thought you gained 2db because of MIMO? John Woodfield, President Delmarva WiFi Inc. 410-870-WiFi -----Original Message----- From: "Josh Luthman" <[email protected]> Sent: Thursday, May 7, 2015 9:35pm To: [email protected] Subject: Re: [AFMUG] Nanobridge M5 Well you're losing 3db because of MIMO. At least 1db from what the antennas say. What's the signal now? Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On May 7, 2015 9:32 PM, "Glen Waldrop" <[email protected]> wrote: I've got a few links out there with the NBM5, longest is around 12 miles. According to the math I should get a decent shot at 24 miles, but according to that same math the NBM5 should have higher signal in every single link I've done. My question here is what is the longest link you've done with the NBM5 25 and what is the actual gain on these units since they don't seem to actually gain 25 as they're suppose to. I'm not opposed to using a Rocket and larger dish, just trying to see what the actual limits to the device are and what the actual gain is for math. Currently I've got the 24 mile shot with a 29 and 26dBi grids, decent, but still using 2008 MT hardware. I need more speed for growth.
