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#1
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Electrical Interference on Cable Internet???
Howdy all. I recently upgraded my internet connection from dial-up to
high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder |
#2
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Electrical Interference on Cable Internet???
Also, using a good quad shield RG-6 will help the situation. Make sure the
shield is grounded somewhere along the line. -- Steve Barker "Felder" wrote in message ups.com... Howdy all. I recently upgraded my internet connection from dial-up to high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder |
#3
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Electrical Interference on Cable Internet???
There is coax and there is coax. Some
coax is not meant for the broadband signal from cable TV. Some Coax has very poor shielding. Some older coax for VHF/UHF TV was not 100% shielded. Check the type of cable in your run as that might be part of the problem. Felder wrote: Howdy all. I recently upgraded my internet connection from dial-up to high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder |
#4
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Electrical Interference on Cable Internet???
On Feb 19, 9:32 pm, wrote:
On 19 Feb 2007 17:17:14 -0800, "Felder" wrote: Howdy all. I recently upgraded my internet connection from dial-up to high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder Call the cable company and get them to fix it. You are paying plenty for the service.- Hide quoted text - - Show quoted text - Apparently nobody read my full post. I have no problems with the cable. I did have until I move my cable line away from the electrical lines. I was just curious if anyone has had a similar experience when running a cable internet line too close to an electrical line. -Felder |
#5
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Electrical Interference on Cable Internet???
On 20 Feb 2007 02:59:50 -0800, "Felder"
wrote: On Feb 19, 9:32 pm, wrote: On 19 Feb 2007 17:17:14 -0800, "Felder" wrote: Howdy all. I recently upgraded my internet connection from dial-up to high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder Call the cable company and get them to fix it. You are paying plenty for the service.- Hide quoted text - - Show quoted text - Apparently nobody read my full post. I have no problems with the I thought they did read your post. Why do you think,and why do you mention, that they didn't? cable. I did have until I move my cable line away from the electrical Exactly. You did have problems. I took their posts to say that if one used the better cable, even when the two cables ran together, right next to each other, there likely wouldn't be interference. lines. I was just curious if anyone has had a similar experience when running a cable internet line too close to an electrical line. -Felder |
#6
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Electrical Interference on Cable Internet???
On Feb 19, 8:17 pm, "Felder" wrote:
Howdy all. I recently upgraded my internet connection from dial-up to high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder no. but clarification needed: this sounds like a self-installation that simply needs a cable company technician. our cablemodem runs off basic time warner RG6 cable wire. the cable company in buffalo ny installs and maintains it. does yours? are you speaking of a second type of wire, ethernet [category___] wire fed from a router? here that is maintained by the homeowner. |
#7
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Electrical Interference on Cable Internet???
On 19 Feb 2007 17:17:14 -0800, "Felder"
wrote: Howdy all. I recently upgraded my internet connection from dial-up to high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. I have cable internet, which works well. I put the modem as close as I could to where the cable enters the house, and ran ethernet (CAT5) cable the rest or the way. Also, CAT5 is easier to handle than coax. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder And (once you get a good connection) there's other things to worry about. An inexpensive router between the cable modem and the computer(s) is a good idea, even if all you have is one computer. You can ask the cable company about that (SOME are helpful that way), but there's really no need to. It's YOUR network. -- Mark Lloyd http://notstupid.laughingsquid.com "Unlike biological evolution. 'intelligent design' is not a genuine scientific theory and, therefore, has no place in the curriculum of our nation's public school classes." -- Ted Kennedy |
#8
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Electrical Interference on Cable Internet???
On Tue, 20 Feb 2007 02:05:01 GMT, Art Todesco
wrote: There is coax and there is coax. Some coax is not meant for the broadband signal from cable TV. Some Coax has very poor shielding. Some older coax for VHF/UHF TV was not 100% shielded. Check the type of cable in your run as that might be part of the problem. And the quality of the connectors (and their installation) is important too. Felder wrote: Howdy all. I recently upgraded my internet connection from dial-up to high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder -- Mark Lloyd http://notstupid.laughingsquid.com "Unlike biological evolution. 'intelligent design' is not a genuine scientific theory and, therefore, has no place in the curriculum of our nation's public school classes." -- Ted Kennedy |
#9
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Electrical Interference on Cable Internet???
On Feb 20, 6:45 am, mm wrote:
Apparently nobody read my full post. I have no problems with the I thought they did read your post. Why do you think,and why do you mention, that they didn't? Because I was getting suggestions on how to fix the problem. I said in my post that the problem appears to be fixed. I was only hitting on anyone with similar experiences. cable. I did have until I move my cable line away from the electrical Exactly. You did have problems. I took their posts to say that if one used the better cable, even when the two cables ran together, right next to each other, there likely wouldn't be interference. Okay, I see what you mean. I am using thr cable supplied to me by the cable company (Time Warner - Road Runner). It is RG-6. Still no problems since I moved the cable away from the electrical lines. So, to me that implies I was getting interference from the electrical lines. Maybe, maybe not. It's only been 24 hrs since I "fixed" the problem. I'll ask the cable guy when he comes out. Sorry for any misunderstandings. -Felder |
#10
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Electrical Interference on Cable Internet???
Felder wrote:
Howdy all. I recently upgraded my internet connection from dial-up to high speed via cable (about time, I know). Since installing the cable I have been having problems getting connected to the internet. If I connected the modem straight to the cable drop coming in the house I would get a good connection, but when I run a cable from the drop to the computer (about 25', no splitters) I would fail to get a connection. Sometimes it would connect, but most the time it would not. So, I got to looking at the cable run (finished basement, drop ceiling) and discovered that in two places the cable was running along side and sitting right on top of some romex. Hmmm, I thought to myself. Could I be getting interference on the cable from the romex? So, I moved the cable several inches away from the romex and low and behold a got a good internet connection. I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder This is my second try, but my response from yesterday didn't show up in my list today. You did the right thing in moving the coax away from the power line. Generally speaking, it is a bad idea to run communications cables parallel to power cables. There is always a good chance of interference. When I was an engineer at NASA the standard policy was to never run power cables and signal cables in the same raceway. And when signal and power cables have to cross they should cross at right angles. Even if there is no apparent problem when running power and signal cables together there may be when unusual power conditions occur. I have been told of severe consequences when such events occur. In the home power and signal cables should always be run in separate wall cavities. Bill Gill |
#11
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Electrical Interference on Cable Internet???
wrote in message That is certainly a good theroretical design goal but reality is the power company and the telco/cableco share the same poles and underground ducts so their wires do run parallel for hundreds of miles. If you are getting ingress on coax or twisted pair, you have another problem. I bet you could see it using TDR in a second. On poles, they are often a few feet a part. What is the range or field that is going to matter? I would imagine the difference between a couple of feet and touching makes a difference in signal, magnetic field or whatever. |
#12
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Electrical Interference on Cable Internet???
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#13
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Electrical Interference on Cable Internet???
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#14
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Electrical Interference on Cable Internet???
I have a cable guy coming out later this week to check my signals so I'll ask him if the electric lines could cause enough interference to affect my internet signal. It appears so and makes sense to me especially if the cable is right on top of and running parallel with the romex. Has anyone had any similar experiences? -Felder This is highly correct.....running parallel to electric ( AC ) lines will cause interference. AC lines create a magnetic field around the AC wire.......when running Cable line parallel to it; the magnetic field basically raps or surrounds the Cable line and therefore causing interference. Note-The magnetic field will not be felt if cable line is run at a 90 degree angle across the AC line nor if cable line is far enough away from the AC so that the "M" field does not encircle it. But- you got it and found it.....good job!! Dean |
#15
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Electrical Interference on Cable Internet???
I don't suppose "common mode" means anything to you guys.- Hide quoted text - - Show quoted text - It is "common " when running a "Cable" line parallel to an AC line to use this "mode" -use sheilded cable. The sheilding in the cable helps to protect it from any magnetic fields. Other than that........nope :-) |
#16
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Electrical Interference on Cable Internet???
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