Nice write up On Thu, Mar 11, 2021, 3:42 PM Aeron Wireless <b...@aeronwireless.com> wrote:
> https://mimosa.co/blog/deploying-a-diversity-link > > On Thu, Mar 11, 2021 at 5:35 PM Steve Jones <thatoneguyst...@gmail.com> > wrote: > >> id considered something like this but to make it a functional thing it >> would have to monitor the two radios and turn up or down a port based on >> better performing system. the guy with the two radios doesnt complain, >> prefers to not have to wait on us to come move it up to the roof or down to >> the post. its cheaper than a truck roll twice a year. >> >> but to the original question, a ground reflected wavelength to a >> parabolic antenna, is that reflected off the top half of the dish into the >> feedhorn? >> >> On Thu, Mar 11, 2021 at 4:23 PM Chuck McCown via AF <af@af.afmug.com> >> wrote: >> >>> Since none of the PMP vendors have a space diversity option, I wonder >>> about just putting up two radios and bonding them at the ethernet level. >>> If it is multipath fading, both radios should not be faded at the same >>> time. Would OSPF or RSTP or EIGRP be able to deal with this scenario? >>> >>> *From:* Steve Jones >>> *Sent:* Thursday, March 11, 2021 2:44 PM >>> *To:* AnimalFarm Microwave Users Group >>> *Subject:* Re: [AFMUG] multipath on a reflector >>> >>> this is one that was part of a group of similar issues. We had one that >>> is white paper level multipath. I can tell you the day and time they start >>> the harvest across the street and the time they finish it. that one we >>> ended up just installing 2 radios and they swap power supplies twice a >>> year. >>> >>> this one is facing west and looking at it the dips begin sharply around >>> 4pm the last week, around noon the week before. thats about the time it >>> starts to cool back down, not that its all that warm. its muddy fields so >>> the surface is soggier in the day, firms up more when it cools. yesterday >>> was super windy and it didnt do it, probably the soil is dryer. >>> >>> IIRC i have her radio right now peaking over the ridge of the roof from >>> her tower. >>> >>> Im planning on going out and putting it on a 12 foot post to halve the >>> fresnel, sable marginal is better than unstable marginal. >>> >>> the first guy i mentioned here is actually a pretty cool case. this >>> general region is super high iron content in the soil, we have another area >>> this is really common and their soil samples are really high as well, i >>> dont know if iron oxide is more reflective han dirt dirt or if certain >>> circumstances make it that way. or could be whatever causes the soil to be >>> more iron rich causes it. or soil content could have nothing to do with it. >>> I had gotten the sample results from a soil testing joint thats a customer, >>> thought i could figure it out but its one of those things somebody smarter >>> than me could probably figure out. >>> >>> On Thu, Mar 11, 2021 at 3:23 PM Brian Webster <i...@wirelessmapping.com> >>> wrote: >>> >>>> Doe this customer have the issue at a certain time of the day? Maybe >>>> around sunrise or sunset. It may be possible that it’s not multipath but at >>>> certain times of the year the antenna has a good path to picking up noise >>>> from the sun and that could be stronger than your AP signal? This usually >>>> is exhibited on paths that have an East/West orientation. Depending on the >>>> gain of the antenna it can be worse than others. Think of the sun either >>>> just above the horizon at sunrise or sunset and the focal beam on the >>>> antenna is such that it picks up that noise enough to be stronger than the >>>> AP. Depending on the time of year, tilt angle of the Earth etc., it looks >>>> like a seasonal issue. >>>> >>>> >>>> >>>> Thank you, >>>> >>>> Brian Webster >>>> >>>> www.wirelessmapping.com >>>> >>>> >>>> >>>> *From:* AF [mailto:af-boun...@af.afmug.com] *On Behalf Of *Steve Jones >>>> *Sent:* Thursday, March 11, 2021 1:36 PM >>>> *To:* AnimalFarm Microwave Users Group >>>> *Subject:* [AFMUG] multipath on a reflector >>>> >>>> >>>> >>>> our APs sit between 90 and 110 feet on average in flat terrain so we >>>> deal with alot of seasonal ground reflectivity issues. We have this one >>>> customer presenting again with whats probably multipath fading, I had tried >>>> putting a shield on the bottom half of the reflector once out of curiosity. >>>> It didnt do much >>>> >>>> what im wondering though is how the ground reflected multipath feeds >>>> into the feedhorn. >>>> >>>> is it reflecting off the top half of the dish and into the feedhorn >>>> like a mirror? >>>> -- >>>> AF mailing list >>>> AF@af.afmug.com >>>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>>> >>> ------------------------------ >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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