Got a picture at least? On Wed, Apr 19, 2023 at 3:35 PM <ch...@go-mtc.com> wrote:
> I tried to find a link, we have one, but I don’t know where I got it. > Perhaps a custom fiber filter from fs.com > > > > *From:* Josh Luthman > *Sent:* Wednesday, April 19, 2023 1:23 PM > *To:* AnimalFarm Microwave Users Group > *Cc:* ch...@go-mtc.com > *Subject:* Re: [AFMUG] OTDR transmit power > > That's clever! Nice tip, thanks. > > On Wed, Apr 19, 2023 at 3:15 PM Chuck McCown via AF <af@af.afmug.com> > wrote: > >> There is a band pass filter you can add for shooting over live fiber. >> >> >> >> *From:* Josh Luthman >> *Sent:* Wednesday, April 19, 2023 11:27 AM >> *To:* AnimalFarm Microwave Users Group >> *Subject:* Re: [AFMUG] OTDR transmit power >> >> On Calix optics they say it's OK if the OTDR hits it with 1650. I don't >> think an OTDR will shoot if it sees 1310/1490. >> >> On Wed, Apr 19, 2023 at 1:03 PM <dmmoff...@gmail.com> wrote: >> >>> Oh I 100% believe they could do it. If I knew tx power of the OTDR it >>> would be easy to estimate how close they’d have to be to exceed the >>> overload threshold of the transceiver. >>> >>> “Dynamic Range” has to be a diff between Tx and sensitivity …..or so I >>> would assume. If it is then I could guess that maybe half the range is >>> from Tx and half from Rx? So a 50dB range might mean +25Tx? I mean that >>> all seems plausible to me, but it’s a lot of assuming. I just wish this >>> number was on the spec sheet. >>> >>> >>> >>> The alleged location of the case they were in was over 200,000 ft away. >>> A ZR is a bit sensitive, but that OTDR would have to be pretty damn strong >>> to nuke it from that distance. Maybe it is that strong, or maybe they’re >>> lying to me. So a second part of the equation is whether I trust what this >>> crew tells me in the future. With same guys we had a link we were >>> troubleshooting suddenly come up 20 minutes after they were “hands off”. >>> So I already think they might be compulsive bullshitters. >>> >>> >>> >>> >>> >>> *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Chuck McCown via AF >>> *Sent:* Wednesday, April 19, 2023 11:57 AM >>> *To:* AnimalFarm Microwave Users Group <af@af.afmug.com> >>> *Cc:* ch...@go-mtc.com >>> *Subject:* Re: [AFMUG] OTDR transmit power >>> >>> >>> >>> These guys think so: >>> >>> https://content.jwplatform.com/previews/IQitGvAV >>> >>> >>> >>> Best Regards, >>> Chuck McCown >>> >>> McCown Technology Corporation >>> 8401 N Commerce Dr >>> Lake Point, Utah 84074 >>> 801-250-9503 Office >>> 435-830-4306 Cell >>> www.mccowntech.com >>> www.microtrench.pro >>> www.terabitnetworks.com >>> >>> >>> >>> *From:* dmmoff...@gmail.com >>> >>> *Sent:* Wednesday, April 19, 2023 9:23 AM >>> >>> *To:* 'AnimalFarm Microwave Users Group' >>> >>> *Subject:* [AFMUG] OTDR transmit power >>> >>> >>> >>> Does anyone know how strong the pulses from an OTDR might be? Is there >>> a rule of thumb to guess that based on the dynamic range? >>> >>> >>> >>> I’m trying to determine if a dark fiber provider might have blasted a ZR >>> optic with an OTDR at close range. We know they were out testing recently, >>> and the manufacturer is saying receiver may have been overloaded and the >>> link is way too long for the far end transceiver to have done it. >>> >>> >>> >>> I’m not out to blame anybody, this is just an educational exercise. >>> ------------------------------ >>> >>> -- >>> 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 >>> >> ------------------------------ >> -- >> 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 >> >
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