The problem is that the modern radios need a lot of power per radio to drive the aux port. Anything 450i or later has a transformer one has to drive. As a result the old splitter solutions won't work.
Just out of curiosity have you tried only one or two radios on a syncbox 12? I'm wondering if this might be a situation where the multiple cables are coupling enough rf into the syncbox to cause the signal loss. I'm going to check and see if there's a syncbox 12 in progress which doesn't have a GPS module on it. With some creative wiring we should be able to replace the GPS module with a 6p6c connector to feed sync from another syncbox. On Sun, Sep 26, 2021, 10:15 PM Sean Heskett <af...@zirkel.us> wrote: > I think I might try taking the sync from a syncbox jr and connect it to a > patch panel with 12 jacks like this one on Amazon. (See below) That way we > can put the sync box jr where we can get sync but still put the > distribution point close the the APs. > > Not sure if splitting sync 12 ways will degrade the signal tho. > > -Sean > > NavePoint 12-Port Cat6 UTP Unsheilded Mini Patch Panel with Wallmount > Bracket Included Black > https://www.amazon.com/dp/B008QR5LIU/ref=cm_sw_r_cp_api_glt_fabc_BWGY3ND2HF8YAZKRB3PG > > > > On Sat, Sep 25, 2021 at 10:03 AM Chuck McCown via AF <af@af.afmug.com> > wrote: > >> I wonder what would happen if you put foil on the inside of the syncbox >> everywhere except for a window for the GPS module? >> Or just a sheet of metal in the direction of where you think the >> interference is coming from. >> >> And/or, put a parasitic antenna element above the GPS module on the >> outside. It would just be a metallic disk of the right diameter. >> Experiment with spacing. I am guessing about a 4” diameter metallic disk. >> Actually you would want to go about 3.5 inches. It needs to be smaller >> than a resonant patch. >> >> You could also put a ring in place of the disk. A choke ring. Too lazy >> to calculate it but it would probably be about 6-8” diameter. >> >> Forrest could experiment with this and see if he can get some more >> gain/directivity out of the system. >> >> *From:* Sean Heskett >> *Sent:* Saturday, September 25, 2021 9:37 AM >> *To:* Forrest Christian (List Account) >> *Cc:* AnimalFarm Microwave Users Group >> *Subject:* Re: [AFMUG] PacketFlux Syncbox 12 external gps antenna >> >> Hi forest, >> >> Yes we have rack injectors on site providing sync over power to the APs. >> However, we always like to have two sync sources especially at this site >> which is at 10,500 feet, gets an average of 400” of snow per year and is >> difficult to access fall/winter/spring because of snow or mud. >> >> What’s odd is we also have a UGPSs at this tower (to provide sync to our >> two CBRS 450m’s) and the UGPS isn’t loosing lock under the heavy >> interference. Unfortunately the UGPS only does sync for 2 APs so we’d have >> to install 6 of them for the 5ghz array we have there instead of the one >> syncbox 12. >> >> Thanks, >> >> Sean >> >> >> On Fri, Sep 24, 2021 at 8:35 PM Forrest Christian (List Account) < >> li...@packetflux.com> wrote: >> >>> There isn't a good solution for timing port sync. >>> >>> However, there's always the power port sync option. For modern radios, >>> you should be able to use a powerinjector+cambium sync up top, with the GPS >>> receiver down near the bottom. >>> >>> On Fri, Sep 24, 2021 at 12:33 PM Sean Heskett <af...@zirkel.us> wrote: >>> >>>> Does anyone know if there is a way to either mount an external gps >>>> antenna or send sync from say a syncbox jr to a syncbox 12? >>>> >>>> We are on a commercial tower and with the syncbox 12 mounted near our >>>> APs there’s too much interference to get gps sync (probably due to some >>>> nearby cellular gear). The only place we can get sync is near the ground >>>> so that would require running 12 sync cables up the tower in a shielded >>>> conduit. >>>> >>>> We tried contacting PacketFlux support but haven’t received a response >>>> yet. >>>> >>>> -Sean >>>> >>>> -- >>>> Sean Heskett >>>> >>>> ZIRKEL >>>> Internet • WiFi • Phone • TV >>>> 970-871-8500 x100 - Office >>>> >>> >>> >>> -- >>> - Forrest >>> >> -- >> Sean Heskett >> >> ZIRKEL >> Internet • WiFi • Phone • TV >> 970-871-8500 x100 - Office >> >> ------------------------------ >> -- >> 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 >> > -- > Sean Heskett > > ZIRKEL > Internet • WiFi • Phone • TV > 970-871-8500 x100 - Office >
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