BER, What is it and how to fix it?

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nice catch, Runner... I've had similar situations... especially noisy primary insulators. Bleeding impulse noise into every drop within a block. Helps to track those with your AM radio tuned to a dead zone up around 1700 kHz.

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nice catch, Runner... I've had similar situations... especially noisy primary insulators. Bleeding impulse noise into every drop within a block. Helps to track those with your AM radio tuned to a dead zone up around 1700 kHz.

 
Thanks RF, we've had our share of the bad insulators as well. They suck pretty bad. I do have some questions for you though: What's the trick for the power co to  1) convince them they have a prob and 2) actually get them there to repair the problem? It always seems we go in circles with them, they never will admit fault.

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Hey! Power Company issues oh yeah got that too....Impulse noise is killer.
We use a PLI-150 Electrical searcher. It "was" made by trilithic but it is no longer made They were used in the past for detecting electrical impulse noise interfering with off air channel reception in some of our areas. It sat in the closet for years till I found it and put it to real good use. The Electric Copany here has something else to sniff it out which they called a "Sleuth" but not the new leakage unit you might be thinking of. I asked the plant supervisor about it and he said that he has had his unit for 20 years and keeps repairing it.

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Our construction dept has pretty good relations with some people at the power co., so the manager just faxes a design print with the area affected highlighted. Few days later, it's fixed.

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Here is a good one, had problems every night from 8:00 pm till 4:00 am with return SNR dumping from 31dbmv-15dbmv.   Checked and replaced all the AGC's in the amps and finally with the spectrum hooked up in the hub with one guy, and me in the at the node; I started pulling return pads one at a time at the node when I felt a slight shock touching the strand.

I look down and there is cow leaning on the fence touching a down guy. I ask the other guy if the return crapped out and he says yes, go down and put a guy guard on the anchor section touching the electric fence and behold noise problem fixed. My boss didn't beleive it till we duplicated it the other day for him.

Found out from the farmer he moves the cow's over to this side of the pasture every night after milking and then brings them in to milk at 4:00 am to milk again and than they go to another pasture till night.

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Holy Shit that is AWESOME!! So freaking random. Thats a goo dstory to relay to customers who thinkwe are bumbeling idiots that cant troublshoot a "simple" problem.

You deerve an awareness award of some kind!

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By the way Tool its 68-degrees outside right now and I am drinking a Beer and cooking a big steak, so instead of an awareness award I will take a Beer.

I participated in the SCTE cable-tech games here in NC at Pinehurst and won overall back in September, That should be a Beer and Barbecue award!

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:~~:  !gulp



45 degrees here....

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RESURRECTION !


OK.... Somebody throw this old dog a bone....
I'm having same issue as stated above and need help verifying  exactly how to identify the problem so I can explain it to the power Co. when I (have the supervisor call them, he doesn't know it yet  ) need the call made.

I've tracked the issue once before and have it narrowed down to just 1 leg (3 spans) before it went away (impulse noise issue). <36 SNR during day, >15 at night after midnight. Had another MT decide to do PM in that node so I let it ride with him. He told me he found squirrel chews and had all 3 spans replaced... taps included 

Problem still exist so I'm gonna have to haul my fat ass out there at 5AM to to try to narrow it even further. Only 4 customers to check on this run. Of course this is all back easement aerial so getting shot is my most worry 

One thing that is odd is there is a jacket on the Power Co. (PC) primary mid-span (not three phase... just primary and ground) which I kinda suspect there was a large tree right there rubbing it as I don't see a stump, but the owners made a compost pile with leaves in the area I suspect it to be... yet the  PC doesn't usually leave jackets hanging on their wire like that after tree removal.

Anywhooo... any troubleshooting hints you guys can throw at me once I verify it's not coming from any of the customers wiring ? My worst fear is getting blown off the ladder while unhooking the drops to check them. I'm hoping for a ground to be running up the pole so I can use it to check for voltage on the strand before I touch as I'll be by myself.

Why am I so sketchy about this one ? I had a tap literally blow up in my face doing hurricane duty... power lost ground as I was opening the tap and it put all the voltage on our strand. I had to leave them shorts at the bottom of the pole when I left

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Here is something for you guys.....
 
BER and MER Fundamentals

http://www.line-man.com/forums/index.php?app=core&module=attach&section=attach&attach_id=17604
 
 

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Sweet!
Let me host it here to so as not to screw with their bandwidth and preserve it.

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tool- attachment isnt working...it keeps giving my a php file....

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All you need is another "E" and you will be fine.. Soon BER becomes BEER....

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Anyone else having an issue? I was able to get it fine in the CHROME MONSTER?

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All you need is another "E" and you will be fine.. Soon BER becomes BEER....

Suddenly! FIXED.