Coaxial cable question.

Cheetah8799

Diamond Member
Apr 12, 2001
4,508
0
76
So I've got this problem with Comcast, and I'm thinking part of it may have to do with the insane cable run that was done prior to me moving into my apartment a few years ago. Here is how it is setup.

Before reading, keep in mind I'd like to NOT have Comcast come over. Technically I'm not supposed to have TV service, but they have never turned it off at the pole, the basic cable is always on. Always has been, even when not paying for internet service. I'd like to not lose this...

Comcast has their box on a power pole across the street a bit, from there the coax cable is strung along a wire across the street to the back corner of my building. That is in itself a good 80 feet. From there, it is strung up over the roof of my building and to the corner where my main tv room is. It comes down and into the side of the apartment. Total length from pole to my cable modem I estimate to be 150 to 200 feet. There are at least two cable-cable connections in there, so it's like 3 pieces of cable strung together. When it gets inside my apartment, I have it split with a 4-way splitter to a TV, TV and Cable Modem. 4th split not used.


Now, since I'm not a coax guy, I don't know the specs and standards for this sort of thing. One time I had Comcast come out and the tech said the cable run was out of code, and he said an engineer would come out to fix that, but they never did. So now I'm having major connection quality issues to the point that internet is very flakey, many dropped connections, periods of zero service, etc. TV is viewable, slight noise noticable, but not too bad. Here are some ideas I've had, and what I plan to do. I'm hoping some folks here can help by giving more suggestions.

1. Possibly weather related, have had many below/above freezing temperature swings here all winter (St. Paul, Minnesota). I think maybe water got in the connections or something and froze multiple times.

2. Cable is just old and needs to be replaced. Possible corrosion?

3. Cable run is too long and needs an inline amplifier.

4. My 4-way splitter is splitting the signal too much. I've tried plugging cable modem direct to cable from the wall though, and that didn't resolve anything. So I'm not so sure this is the problem.

5. Comcast may need to check their equipment at the pole.


My plan of action tonight is to try moving my cable modem and router to the back of the building to the first break in the coax. I will plug it in there if possible to test and see if I get a better connection. If I do, that means I have bad cable going over the roof.


Other than my plan tonight, I'm not sure what else to try. Anyone have any suggestions?
 

bucwylde23

Diamond Member
Apr 21, 2005
4,180
0
71
Originally posted by: Cheetah8799
So I've got this problem with Comcast, and I'm thinking part of it may have to do with the insane cable run that was done prior to me moving into my apartment a few years ago. Here is how it is setup.

Before reading, keep in mind I'd like to NOT have Comcast come over. Technically I'm not supposed to have TV service, but they have never turned it off at the pole, the basic cable is always on. Always has been, even when not paying for internet service. I'd like to not lose this...

Comcast has their box on a power pole across the street a bit, from there the coax cable is strung along a wire across the street to the back corner of my building. That is in itself a good 80 feet. From there, it is strung up over the roof of my building and to the corner where my main tv room is. It comes down and into the side of the apartment. Total length from pole to my cable modem I estimate to be 150 to 200 feet. There are at least two cable-cable connections in there, so it's like 3 pieces of cable strung together. When it gets inside my apartment, I have it split with a 4-way splitter to a TV, TV and Cable Modem. 4th split not used.


Now, since I'm not a coax guy, I don't know the specs and standards for this sort of thing. One time I had Comcast come out and the tech said the cable run was out of code, and he said an engineer would come out to fix that, but they never did. So now I'm having major connection quality issues to the point that internet is very flakey, many dropped connections, periods of zero service, etc. TV is viewable, slight noise noticable, but not too bad. Here are some ideas I've had, and what I plan to do. I'm hoping some folks here can help by giving more suggestions.

1. Possibly weather related, have had many below/above freezing temperature swings here all winter (St. Paul, Minnesota). I think maybe water got in the connections or something and froze multiple times.

2. Cable is just old and needs to be replaced. Possible corrosion?

3. Cable run is too long and needs an inline amplifier.

4. My 4-way splitter is splitting the signal too much. I've tried plugging cable modem direct to cable from the wall though, and that didn't resolve anything. So I'm not so sure this is the problem.

5. Comcast may need to check their equipment at the pole.


My plan of action tonight is to try moving my cable modem and router to the back of the building to the first break in the coax. I will plug it in there if possible to test and see if I get a better connection. If I do, that means I have bad cable going over the roof.


Other than my plan tonight, I'm not sure what else to try. Anyone have any suggestions?

Call comcast out, have then run cable the proper way and start paying for your service like everyone else. :)
 

nweaver

Diamond Member
Jan 21, 2001
6,813
1
0
Just because they left it on doesn't make it right....


call them up, tell them to come replace the run with something in code.
 

Atheus

Diamond Member
Jun 7, 2005
7,313
2
0
If it was me I'd be up that telephone pole taking the box apart and adding an amplifier and maybe a bit of ferrite. In fact I'd probably take it apart even if there was nothing wrong with my connection. In fact, I'd probably take it apart even if it wasn't my connection at all ;)

We don't have cable round here - for some reason it's not too popular in Europe. Everyone gets thier internet over DSL and TV over satellite.
 

pikachu656

Senior member
Jan 9, 2006
200
0
0
If you are getting snow on some of your channels that's a usual indication that the RF is too low or too high (depending on which channels are getting snow) and you need to setup a service call for them to come out and balance the line. Make sure when they come out to verify if the cable line that's coming from the pole is RG-6. Most cable companies use to use RG-59 cable and that's fine for TV but it doesn't support cable modems very well and they have to switch it to RG-6. Cable modems operate at a high frequency than TV does that's why if you are having issues with TV channels you will be having issues with your modem also.

This is a very common problem that is not out of the ordinary. I know cuz I use to work for a cable company and I learned alot from those techs.
 

bruceb

Diamond Member
Aug 20, 2004
8,874
111
106
It is always best with Cable Modems to take the internet signal off at the point of entry
thru a 2 way splitter ... make sure it is capable of handling digital & high frequency rf up to about 2 ghz

 

Cheetah8799

Diamond Member
Apr 12, 2001
4,508
0
76
Originally posted by: insename2
http://192.168.100.1 check SNR and post it...


Ya, I found some info yesterday regarding these stats on dslreports.com. Of course by the time I got home my connection was working fine again. All my stats are showing well within spec for Comcast. I'll be testing more in the future, especially on bad days, and will see what happens.

I wish I could get something consistent to happen with my cable connection. With the way it is now, I have no idea if it would be acting up when a Comcast tech shows up. I hate looking like a doofus when it's obvious to me that the day before it was all hosed and I had no internet.

I was going to go out back and test my cable modem where the cable comes across the street to my building. Unfortunately, the connections there are all exposed to the elements, and because of that they are totally stuck together. No way I'm going to get them apart without likely breaking them or stripping out the threads.

I guess I just have to wait and see at this point.
 

pikachu656

Senior member
Jan 9, 2006
200
0
0
Weather and the elements could play a big factor in your connection probleml, especially if there's a crack in the line. You may want to double check for that too.