RG-59 & Amplifier?
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Posted by Crypt on March 9, 2005, 2:25 am
Please log in for more thread options Hi all, I have cheap RG-59 cable running through the house. (I'd say maybe 200ft total) It is also split 4 ways with a 120db isolation 5-1000mhz splitter. The TV's and cable modem at the end of the cable have a lot of shadowing and other noise. The cable modem also occasionally will lose it's connection. If I were to install a single port electroline 15db amplifier, would it resolve some of these issues? I have read RG-59 cable is cheap and there are better cables, but I'd prefer not to re-wire the whole house if possible... Thanks for any info! | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Ed Nielsen on March 8, 2005, 10:24 pm
Please log in for more thread options The first question is: When you say "cheap RG 59, do you mean copper-braid cable, or is it just inexpensive foil+braid RG 59? If it is either, it needs to be replaced. Copper-braid cable is, at best, only 95% shielded, which means 5% or more unshielded. But that's the expensive copper-braid cable. The most common is 65-85% braid, which is 15-35% unshielded (holes). All of those holes get found by broadcast TV and radio signals. On the VHF locals, you get ghosting, upper teens through lower 20s, you get crosshatch and other noise in the pictures. Channels 95-97 have loads of garbage (FM radio), and if there are broadcast UHF channels, cable channels ~65 and up will have problems. If the cable has foil, but it is not bonded, there is the potential for the same problems, but to a lesser degree. An amplifier will not help the situation. If the cable has foil that is bonded to the dielectric, it is probably alright. Make sure that the connectors are real connectors and not the twist-on or push-on type. Preferably, the connectors are compression, but hex-crimp are also acceptable. The EDA-2100 amp is an excellent amp. Your cable modem, however, should be on its own, dedicated splitter prior to the TV distribution system (including amplifier). CIAO! Ed Crypt wrote: | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Crypt on March 9, 2005, 6:34 am
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Hello, Thank you for the response. What type of cable would you recommend I use? Thanks | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Crypt on March 9, 2005, 7:13 am
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Also about the cable modem. If I put the EDA-2100 before the cable modem (I'm thinking maybe where the cable line first comes in to the house) is there any chance it could help the cable modem maintain connectivity? Thanks! | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Ed Nielsen on March 9, 2005, 11:37 am
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Cable modems have an operating range (input signal level) of -15 to +15dBmV As long as your input level is within that range, it will work just fine. It's unlikely that you'll need to amplify that leg. If ingress is the cause of your problem, the cable modem may simply not be heard above all of the other junk that's in there. Another possibility is the splitter itself. It could have gone south and have more that the ~8dB loss that 4-way splitters have. Unless not possible, a cable modem should always be on its own, dedicated splitter (or DC) and be the first device in the line, after the groundblock. CIAO! Ed Crypt wrote: > Also about the cable modem. If I put the EDA-2100 before the cable modem
> (I'm thinking maybe where the cable line first comes in to the house) is > there any chance it could help the cable modem maintain connectivity? > > Thanks! > > | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| RG-59 & Amplifier? | March 9, 2005, 2:25 am |
>
> I have cheap RG-59 cable running through the house. (I'd say maybe 200ft
> total) It is also split 4 ways with a 120db isolation 5-1000mhz splitter.
> The TV's and cable modem at the end of the cable have a lot of shadowing and
> other noise. The cable modem also occasionally will lose it's connection.
>
> If I were to install a single port electroline 15db amplifier, would it
> resolve some of these issues? I have read RG-59 cable is cheap and there
> are better cables, but I'd prefer not to re-wire the whole house if
> possible...
>
> Thanks for any info!
>
>