So overload is -14db where the other one is -7, but is rx sensitivity also ~7db higher? if it is, just pop a ~7db attenuator into it and all the weaker ONTs will still connect just fine.
On Wed, Jul 12, 2023 at 3:31 PM <[email protected]> wrote: > In my imagination I picture something with microsecond response time that > only affects the signal from the stronger ONT. > > If signal is stronger than -15 then reduce it by 5dB. > > > > Maybe some kind of opto-electronic switch that directs light through two > equal length paths. One path has the attenuator, and the signals from the > strong ONT take that path and recombine with the unattenuated path > afterwards. I suppose it doesn’t exist and would cost a million dollars if > it did. > > > > We’ll see if the vendor can fix the sensitivity issue, and otherwise we’ll > just not buy that unit. > > > > -Adam > > > > > > *From:* [email protected] <[email protected]> > *Sent:* Tuesday, July 11, 2023 1:01 PM > *To:* [email protected]; 'AnimalFarm Microwave Users Group' < > [email protected]> > *Subject:* Re: [AFMUG] "Low pass" attenuator > > > > The real hot ones are just a time slice I presume so you would have to > take the attenuator in and out of the circuit synched on the ont transmit > schedule. > > Pads on hot ONTs seem to be the only solution to me. > > > > > > > > *From:* [email protected] > > *Sent:* Tuesday, July 11, 2023 10:16 AM > > *To:* 'AnimalFarm Microwave Users Group' > > *Cc:* [email protected] > > *Subject:* RE: [AFMUG] "Low pass" attenuator > > > > Exactly. > > We were testing a different brand of XGS-PON transceiver. It works fine, > except clients stronger than about -14 don’t connect. Our current brand > alarms at -10, but functions as high as -7, so our design assumes -10 as a > cutoff. > > We can go around and pad the hot ONT’s, but it would be super convenient > if we could magically add 5dB to only the real hot ones. > > > > …. we could just not use the transceiver, but it’s a lot cheaper than what > the OLT manufacturer is selling us so it would be nice to make it work. > > > > -Adam > > > > > > *From:* AF <[email protected]> *On Behalf Of *Chuck McCown via AF > *Sent:* Tuesday, July 11, 2023 11:01 AM > *To:* AnimalFarm Microwave Users Group <[email protected]> > *Cc:* [email protected] > *Subject:* Re: [AFMUG] “Low pass” attenuator > > > > Curious, where would you have two signals of different amplitude in a > fiber system? PON return signals? > > > > > > *From:* Adam Moffett > > *Sent:* Tuesday, July 11, 2023 5:07 AM > > *To:* AnimalFarm Microwave Users Group > > *Subject:* [AFMUG] “Low pass” attenuator > > > > Is there such a thing as a fiber attenuator that only attenuates a signal > higher than some threshold? > > > > I’m thinking to prevent overloading a receiver, but let weaker signals > pass unimpeded. > > > > Get Outlook for iOS <https://aka.ms/o0ukef> > ------------------------------ > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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