Re: [AFMUG] fiber patch cables

2024-08-27 Thread Trey Scarborough
The only thing you have to worry about with shorter cables is the reflection. In some instances with dirty connector at just the right connector you can get reflection back in to the transmitter that can cause errors, the tx to shut down or premature failure. This is very uncommon with LR 10G a

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Josh Luthman
So far every time we've used the OTDR it's been accurate within 1 foot. On Tue, Aug 27, 2024 at 12:55 PM Trey Scarborough wrote: > The only thing you have to worry about with shorter cables is the > reflection. In some instances with dirty connector at just the right > connector you can get refl

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Carl Peterson
Hey Josh, What cheap Chinese OTDRs are you using? I'm in the market. On Tue, Aug 27, 2024 at 2:31 PM Josh Luthman wrote: > So far every time we've used the OTDR it's been accurate within 1 foot. > > On Tue, Aug 27, 2024 at 12:55 PM Trey Scarborough wrote: > >> The only thing you have to worry

Re: [AFMUG] fiber patch cables

2024-08-27 Thread chuck
Wow, sometimes looking for gopher damager over 20 miles I have been off a mile. From: Josh Luthman Sent: Tuesday, August 27, 2024 1:30 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] fiber patch cables So far every time we've used the OTDR it's been accurate within 1 foot. On

Re: [AFMUG] fiber patch cables

2024-08-27 Thread dmmoffett
Yeah, I was gonna say, the OTDR might give you a perfect fiber distance, but accounting for the built-in twist and the slack loops complicates matters. From: AF On Behalf Of ch...@go-mtc.com Sent: Tuesday, August 27, 2024 3:47 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG]

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Josh Luthman
This is the latest purchase: https://www.amazon.com/gp/product/B0CW3B9ZM8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 On Tue, Aug 27, 2024 at 3:43 PM Carl Peterson wrote: > Hey Josh, > > What cheap Chinese OTDRs are you using? I'm in the market. > > On Tue, Aug 27, 2024 at 2:31 PM Josh Luth

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Josh Luthman
A mile?! IDK how that's possible. Every time we turn a new splitter on the sequentials and OTDR are within a few feet - we lose a couple of feet in butt splices and our sequentials end up wrong. Every new reel gets tested on delivery and it's right on. When we had a broken fiber (ants) it was r

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Josh Luthman
We use 3GIS and document the sequentials (footage in/footage out) and then tack on 50 or 26 feet for slack (midspan, butt). On Tue, Aug 27, 2024 at 3:55 PM wrote: > Yeah, I was gonna say, the OTDR might give you a perfect fiber distance, > but accounting for the built-in twist and the slack loop

Re: [AFMUG] fiber patch cables

2024-08-27 Thread chuck
When you have spans up to 50-75 miles at times, you have to use longer high power pulses. There is a lot of variability in velocity of propagation, earth temperature, splice slack loops, fiber twist. 1 mile error over 50 miles is only 2%. You can easily be off by several thousand feet. You c

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Josh Luthman
I don't see how you have a 50 mile span. Even if you get 80k reels that's 15 miles. On Tue, Aug 27, 2024 at 5:19 PM wrote: > When you have spans up to 50-75 miles at times, you have to use longer > high power pulses. There is a lot of variability in velocity of > propagation, earth temperature

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Ken Hohhof
Doesn’t 80 km = 50 miles? And can’t you splice? How far can you go with LR optics? From: AF On Behalf Of Josh Luthman Sent: Tuesday, August 27, 2024 4:51 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] fiber patch cables I don't see how you have a 50 mile span. Even if

Re: [AFMUG] fiber patch cables

2024-08-27 Thread chuck
Magical device called a fusion splicer. Our reels were typically 33,000’ From: Josh Luthman Sent: Tuesday, August 27, 2024 3:51 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] fiber patch cables I don't see how you have a 50 mile span. Even if you get 80k reels that's 15 miles.

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Ken Hohhof
Sorry, I read 80k as km not kft. From: AF On Behalf Of ch...@go-mtc.com Sent: Tuesday, August 27, 2024 5:26 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] fiber patch cables Magical device called a fusion splicer. Our reels were typically 33,000’ From: Josh Luthman

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Josh Luthman
80,000 feet reels. If you splice it, you will see an event in your OTDR. On Tue, Aug 27, 2024 at 6:23 PM Ken Hohhof wrote: > Doesn’t 80 km = 50 miles? > > > > And can’t you splice? How far can you go with LR optics? > > > > *From:* AF *On Behalf Of *Josh Luthman > *Sent:* Tuesday, August 27,

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Josh Luthman
Don't you document where your splices are? If you see your splices every 33k and see it's broken 1 mile from the last splice it should be pretty obvious, no? On Tue, Aug 27, 2024 at 6:26 PM wrote: > Magical device called a fusion splicer. Our reels were typically 33,000’ > > > *From:* Josh Lut

Re: [AFMUG] fiber patch cables

2024-08-27 Thread Ryan Ray
We use EXFO otdr's on some spans that are 160km and we can get it down to the metre. On Tue, Aug 27, 2024 at 7:07 PM Josh Luthman wrote: > Don't you document where your splices are? If you see your splices every > 33k and see it's broken 1 mile from the last splice it should be pretty > obvious