Eww, that's nasty. Wipe the end on your shirt like a normal tech. On Thu, Aug 21, 2025 at 1:15 PM Ken Hohhof <[email protected]> wrote:
> And only sissies use those cleaning pens, spit works just fine, right? > > > > *From:* AF <[email protected]> *On Behalf Of *castarritt > *Sent:* Thursday, August 21, 2025 12:39 PM > *To:* AnimalFarm Microwave Users Group <[email protected]> > *Subject:* Re: [AFMUG] Help me Grok this - tolerance to reflected power > > > > For PON specifically, I think you can run into interferrence issues from > bad connections with inadequate return loss long before you have to worry > about damaging the transceivers. That's why everyone uses APC connectors > for PON. > > > > On Thu, Aug 21, 2025 at 12:20 PM Adam Moffett <[email protected]> wrote: > > It's PON, so yeah Bi-directional. Different wavelengths for each > direction. > > > ------------------------------ > > *From:* AF <[email protected]> on behalf of Ken Hohhof < > [email protected]> > *Sent:* Thursday, August 21, 2025 1:08 PM > *To:* 'AnimalFarm Microwave Users Group' <[email protected]> > *Subject:* Re: [AFMUG] Help me Grok this - tolerance to reflected power > > > > I assume this is not BiDi fiber? > > > > *From:* AF <[email protected]> *On Behalf Of *Adam Moffett > *Sent:* Thursday, August 21, 2025 12:01 PM > *To:* AnimalFarm Microwave Users Group <[email protected]> > *Subject:* Re: [AFMUG] Help me Grok this - tolerance to reflected power > > > > I think the "tolerance to reflected power" was the wrong direction to > look. That seems like it's more about not damaging the equipment. I'll > back out of the rabbit hole and just ask what I'm trying to figure out: > > > > How much does reflectance actually hurt you on PON? Google results are > vague. > > > > Example: You generally need to have two connectors at the OLT (device to > patch panel), and there's one connector at the ONT. If you fusion spliced > everything else so there were no additional reflective events, would there > be a measurable BER or stability difference compared to having a coupler in > the NID, connectorized splitters in the field, etc. > > > > Another example: An AFL Fastconnect twist-on SC/APC field termination has > -50dB reflectance according to the spec sheet. A factory terminated > connector or splice-on connector is -65dB. How much does the twist-on hurt > you? > > > > > > -Adam > > > > > ------------------------------ > > *From:* Adam Moffett <[email protected]> > *Sent:* Thursday, August 21, 2025 11:54 AM > *To:* AnimalFarm Microwave Users Group <[email protected]> > *Subject:* Help me Grok this - tolerance to reflected power > > > > > > Definition from ITU G.987: > > 3.3.15 tolerance to reflected power (transmitter): A transmitter parameter > that characterizes the > > maximum admissible ratio of the average reflected optical transmit power > incident at the transmitter > > to the average optical transmit power. > > > > If my average transmit power is +6dBm and the tolerance to reflected power > is -15dB, then 6 - 15 = -9, so reflected power as strong as -9dBm won't > harm the transmitter? > > Is it that easy or am I misunderstanding the definition? > > > > -Adam > > > > > > > > -- > 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 >
-- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
