Community Forum

Re: Cable splitter specifications

Regular Visitor

Re: Cable splitter specifications

While "activating" two "Digital Transport Units" I was told that any splitters in the line must be at least 2.5 GHz.  I'm having some issues with the TV (image tearing, freezing) and found I have a 5-1000 MHz splitter like the ones "recommended" here.  Would it be a good idea to replace it with e.g. a Radio Shack 5-3000 MHz four-way splitter (one to the cable modem and three to TV locations in the house)?  Also, shouldn't the unused ports if any be properly terminated at 75 ohms?

Diamond Problem Solver

Re: Cable splitter specifications

FWIW, any splitters that go higher than 1000 MHz are designed more so for satellite system connections. You are better off using these;

 

Here are some quality splitters that Comcast actually uses in different market areas;

Antronix CMC2002H 2-Way Splitter: http://www.amazon.com/Antronix-CMC2002H-2-Way-Splitter/dp/B001E4OH1E

Regal 2 WAY 1 GHZ SPLITTER: http://www.amazon.com/DIG702867-Regal-WAY-GHZ-SPLITTER/dp/B0018BQMUM/ref=sr_1_2?s=electronics&ie=UTF...

 

Extreme Broadband BDS102H 2-Way Digital Coax Splitter: http://www.amazon.com/EXTREME-DIGITAL-PERFORMANCE-CABLE-SPLITTER/dp/B007YV0UQW


http://www.cencom94.com/subpage21.html

It's best to configure the splitter arrangement so that there aren't any unused ports if possible, but yes, it is better to put terminators on any unused ports.

 

http://www.amazon.com/Ohm-Terminator-4-Pack-Cable-Connections/dp/B0016A986K

Regular Visitor

Re: Cable splitter specifications

The Comcast/Xfinty representative I talked to on the phone after I had trouble with the TV setup told me specifically that if I had two TVs connected, then I needed at least a 2.5 GHz bandwidth splitter.  I don't have a broadband spectrum analyzer, otherwise I would have looked at the spectrum of what is on the cable when digital TV, phone and Internat are all active, to help me decide whom I should believe.  A publication showing this spectrum, or the way it is allotted, would be just as good.

 

Supporting EG/Connection Expert's reply is the fact that the Radio Shack 3.0-GHz splitter did not resolve my problem: but replacing a cable that had push-on connectors with one that had the proper threaded shell did resolve it.

 

 

Expert

Re: Cable splitter specifications


unsinn wrote:

The Comcast/Xfinty representative I talked to on the phone after I had trouble with the TV setup told me specifically that if I had two TVs connected, then I needed at least a 2.5 GHz bandwidth splitter.  I don't have a broadband spectrum analyzer, otherwise I would have looked at the spectrum of what is on the cable when digital TV, phone and Internat are all active, to help me decide whom I should believe.  A publication showing this spectrum, or the way it is allotted, would be just as good.

 


Anyone that told you that you need a "2.5 GHz" splitter has no idea what they are talking about. You can see standard North American cable TV frequencies here: http://en.wikipedia.org/wiki/North_American_cable_television_frequencies

 

 


I am not a Comcast employee, just a moderator. Pls observe Wheaton's Law.
Contributor

Re: Cable splitter specifications

never buy those from Radioshack, they are cheap and worthless, I made the mistake of buying that and those gold plated things are horrible. Defintely go with one from the list EG posted. Also dependig how many devices you need to split check on amazon as they have various different ones

Contributor

Re: Cable splitter specifications

if they are going to be doing the internet they sure do need 2.5 ghz, anything less and the signal will be weak.

Diamond Problem Solver

Re: Cable splitter specifications


Andrew32 wrote:

if they are going to be doing the internet they sure do need 2.5 ghz, anything less and the signal will be weak.


Sorry but that is incorrect.

Regular Visitor

Re: Cable splitter specifications

Thanks, I-am-nerdburg, for the link.  That would seem to settle it.  Comcast/Xfinity should probably do a better job of training the people who handle the calls.  It only starts rumors when they tell people things like that.

 

Contributor

Re: Cable splitter specifications

ok I stand corrected

Contributor

Re: Cable splitter specifications

Well I had one support person tell me that someone probably that I needed a static connection and someone probably was stealing my internet, talked to Comcast tech and they said that wasn't what was going on.

 

 

Diamond Problem Solver

Re: Cable splitter specifications


Andrew32 wrote:

ok I stand corrected


Yeah. Current cable plant does not go higher than 1000MHz (1GHz). No worries ! Smiley Happy

Official Employee

Re: Cable splitter specifications

just go to your nearest service center and ask for one.

Regular Visitor

Re: Cable splitter specifications

Not sure what you mean by "cable plant," but RG-7 cable itself has less than 10 dB loss per 100 ft at 1000 MHz, and the loss goes up more or less steadily with frequency rather than having a sudden onset.  There is definitely usable transmission at 2 or 2.5 or 3 GHz, depending on how long the cable run is.

 

Incidentally, thanks for your input!

Diamond Problem Solver

Re: Cable splitter specifications

O/k we are talking about two different things.