Ribbon splices are bound to have higher losses than singles, as ribbon splicers are cladding aligned, not core aligned.
Have you run a bi-directional OTDR trace on the problem splices to get an accurate measurement of loss? A one way OTDR trace may over or understate the real loss. Jared > Sent: Thursday, September 10, 2020 > From: ch...@wbmfg.com > To: af@af.afmug.com > Subject: Re: [AFMUG] My solution > > Sometimes. Yeah, that 844 reports it to 4 decimal places and it says > "-17.0000" > On my main cables I am pretty anal. I have 576 strands leaving the C.O. I > really want every splice perfect if I can get it now so when the day comes > that we actually use the strand there will be no issues. > > I am finding that the ribbon splices have much higher loss. The OTDR > reports them about 10X higher than that splicer. Have not got to the bottom > of that yet. > I did find about 4 dB of loss in the C.O. where a tech had bent a ribbon a > little tight. That was pretty remarkable. I just increased the radius a > bit and got that much back. > > -----Original Message----- > From: fiber...@mail.com > Sent: Thursday, September 10, 2020 > To: af@af.afmug.com > Subject: Re: [AFMUG] My solution > > So, Chuck, you are using a power meter to determine that fusion splices > reported as 0.02 dB are actually 0.1 dB? > > That's really impressive if you are measuring from CO to the subscriber. Not > only will your documentation have to be perfectly accurate correctly > reflecting each span length, the 2% slack inside the cable, each connector > characterized and each splitter port's non-uniformity measured. > > I think your 844G is reporting incorrect light levels if it is showing no > loss over a 8000' span. > > > Jared > > > Sent: Thursday, September 10, 2020 > > From: ch...@wbmfg.com > > To: af@af.afmug.com > > Subject: Re: [AFMUG] My solution > > > > I have equipment to do bidi, olts anything someone may want. > > Power meter is the only way to really know your span loss. > > > > With my better splicers we can see the quality of the cleave and the fiber > > itself. > > None of the splicers measure the loss anymore, they use some kind of > > graphic > > image algorithm. > > > > I like my splices to all be .02 or better. For example, my first customer > > RX optical level is 17 dBm this morning. Leaving the C.O. splitter it is > > 17.0 And they are 8000' away. Nice to see. Hard to believe. That is > > what > > the 844G is reporting. > > > > -----Original Message----- > > From: fiber...@mail.com > > Sent: Thursday, September 10, 2020 > > Subject: Re: [AFMUG] My solution > > > > Re: fusion splice losses, is the first the loss reported by the fusion > > splicer and the latter a measured value? > > > > Do you measure with light source and power meter or bidirectional OTDR? > > One > > way OTDR shots are only an estimate and may report incorrect loss values > > for > > splices. > > > > Even at 0.1 dB fusion splicing is far superior than mechanical splices > > that > > average 0.2 dB - 0.75 dB. > > > > Jared > > > > > > > Sent: Thursday, September 10, 2020 > > > From: ch...@wbmfg.com > > > To: af@af.afmug.com > > > Subject: Re: [AFMUG] My solution > > > > > > I have found that the db loss on fusion splices to be wildly optimistic. > > > It > > > may say .02 dB but in reality be .1 > > > They just guess at it based on the look of the fiber. The old first > > > generation splicers actually injected a signal and read the splice loss. > > > > > > -----Original Message----- > > > From: fiber...@mail.com > > > Sent: Wednesday, September 9, 2020 > > > To: af@af.afmug.com > > > Subject: Re: [AFMUG] My solution > > > > > > Just as an FYI, there are some nonexpensive fusion splicers out there. > > > > > > Chinese models (AI-8/AI-9) for under a grand on Amazon. Less on > > > eBay/Aliexpress. I got one. It works. There's apparently an add-on for > > > splice on connectors. > > > Smaller handheld models from Jilong (a grand) and Easysplicer (bit over > > > a > > > grand, V groove, Swedish manufacturer). Both support splice on > > > connectors. > > > > > > FOA mini "review" on the Easysplicer: > > > https://www.thefoa.org/foanl-5-16.html > > > > > > Any of those should work for terminating drops. Personally I prefer > > > fusion > > > splicing over mechanical splices. > > > > > > Jared > > > > > > > Sent: Wednesday, September 09, 2020 > > > > From: "Chuck McCown" <ch...@wbmfg.com> > > > > To: af@af.afmug.com > > > > Subject: [AFMUG] My solution > > > > > > > > I think I will switch to a mechanical. Too cumbersome to haul out an > > > > expensive fusion splicer. > > > > > > > > > > > > > > > > Sent from my iPhone-- > > > > 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 > > > > > > -- > > 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
