It's on the $300 China one, $1000 China one, and the $4000+ VeEx/Exfo...I have to assume it's on all of them.
On Wed, Apr 19, 2023 at 2:25 PM <dmmoff...@gmail.com> wrote: > I know there’s a safety feature like that on some OTDR’s. I don’t know > what this bunch was using. > > > > > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Josh Luthman > *Sent:* Wednesday, April 19, 2023 1:28 PM > *To:* AnimalFarm Microwave Users Group <af@af.afmug.com> > *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 >
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