New CPE: http://www.cambiumnetworks.com/resources/pmp-450b/ <http://www.cambiumnetworks.com/resources/pmp-450b/>
> On Jul 28, 2017, at 12:03 PM, Gino A. Villarini <[email protected]> wrote: > > What is the 450b? > > On 7/28/17, 12:55 PM, "Af on behalf of Matt Mangriotis" > <[email protected] <mailto:[email protected]> on behalf of > [email protected] > <mailto:[email protected]>> > wrote: > > >Joe - I just answered your forum post... but might as well repeat and add > >to it here too. > > > >You guys are right in that the combination of the two factors are what > >matters to the modulation that the radio will achieve. You have to be > >above a certain absolute power level (RSL), but ALSO have enough distance > >(SNR) above the noise to decipher the bits. That is, even if you're > >receiving the intended signal at -55, but have noise at -70, the 15 dB > >separation (i.e. SNR) isn't enough to allow for 256QAM modulation. > > > >Regarding sensitivity levels, the easiest place for me to find these is > >in the Link Capacity Planner Tool: > >https://support.cambiumnetworks.com/files/capacityplanner/ > ><https://support.cambiumnetworks.com/files/capacityplanner/> > > > >You can input the radios you're using and it'll spit those out. > > > >During final product testing, we've determined that the 450b is > >equivalent to the 450i SM in these specifications, so until that tool > >gets updated with official numbers (which may vary slightly), I would use > >that. > > > >Hope this helps, > >Matt > > > > > > > Gino A. Villarini > > President > Metro Office Park #18 Suite 304 Guaynabo, Puerto Rico 00968 > <aeronet-logo_310cfc3e-6691-4f69-bd49-b37b834b9238.png> > > -----Original Message----- > >From: Af [mailto:[email protected] <mailto:[email protected]>] On > >Behalf Of Joe Falaschi > >Sent: Friday, July 28, 2017 11:49 AM > >To: [email protected] <mailto:[email protected]> > >Subject: Re: [AFMUG] Cambium 450b specifications > > > >Sure it would. We have some links reporting a SNR above 32db, enough to > >get 8x but are weaker than -56 signals. So both matter. > > > >Joe > > > > > > > >> On Jul 28, 2017, at 11:44 AM, Chris Wright <[email protected] > >> <mailto:[email protected]>> wrote: > >> > >> Wouldn't SNR play a bigger role than general signal level? What good is > >>-67.8dBm if the noise floor is -75dBm? > >> > >> Chris Wright > >> Network Administrator > >> > >> > >> -----Original Message----- > >> From: Af [mailto:[email protected] <mailto:[email protected]>] On > >> Behalf Of Joe Falaschi > >> Sent: Friday, July 28, 2017 9:28 AM > >> To: [email protected] > >> Subject: [AFMUG] Cambium 450b specifications > >> > >> We¹re looking at some questions of why certain links are at certain > >>modulations (uplink is better than downlink). It¹s explained by the > >>spec sheet of the current equipment and RX sensitivity. Basically the > >>450M AP can do more with less signal than the CPE can. Specs below. In > >>any case we were then wondering what the new 450b RX sensitivity would > >>be. There is a spec sheet on the Cambium website but this isn¹t listed. > >> Anyone have this information? > >> > >> 450M AP RX sensitivity > >> 1x = - 93.5 dBm > >> 2x = -88.6 dBm > >> 4x = -81.5 dBm > >> 6x = -75.9.0 dBm > >> 8x = -67.8 dBm > >> > >> 450SM RX sensitivity > >> 1x = -84 dBm > >> 2x = -80.5 dBm > >> 4x = -74 dBm > >> 6x = -66.9 dBm > >> 8x = -56 dBm > >> > >> 450i SM RX sensitivity > >> 1x = -85.9 dBm > >> 2x = -81.5 dBm > >> 4x = -75.8 dBm > >> 6x = -69.3 dBm > >> 8x = -61.6 dBm > >> > >> Joe Falaschi > >> e-vergent > >> > >
