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.
Get Outlook for iOS <https://aka.ms/o0ukef>
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