You put the attenuator in the NID.
On Wed, Jul 12, 2023 at 8:24 PM Bill Prince <part15...@gmail.com> wrote:
> What if you just feed it into a splitter? a 32-way split will knock off a
> bunch of dBs.
>
>
> bp
> <part15sbs{at}gmail{dot}com>
>
> On 7/12/2023 2:11 PM, castarritt wrote:
>
> 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 <dmmoff...@gmail.com> 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:* ch...@go-mtc.com <ch...@go-mtc.com>
>> *Sent:* Tuesday, July 11, 2023 1:01 PM
>> *To:* dmmoff...@gmail.com; 'AnimalFarm Microwave Users Group' <
>> af@af.afmug.com>
>> *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:* dmmoff...@gmail.com
>>
>> *Sent:* Tuesday, July 11, 2023 10:16 AM
>>
>> *To:* 'AnimalFarm Microwave Users Group'
>>
>> *Cc:* ch...@go-mtc.com
>>
>> *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 <af-boun...@af.afmug.com> *On Behalf Of *Chuck McCown via AF
>> *Sent:* Tuesday, July 11, 2023 11:01 AM
>> *To:* AnimalFarm Microwave Users Group <af@af.afmug.com>
>> *Cc:* ch...@go-mtc.com
>> *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.
>>
>>
>>
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