Whats the most effective way to split signal between Cable modem and TV-Tuner Card

[Akaz1976]

I want to reduce signal degradation as much as possible.

Akaz

 

[kornermi]

I don't know any other way than just using 2-way splitter. 5-1100 MHz -3.5dB regular splitter should do it. You need a high pass filter for the TV end, though, to prevent the tuner noise from entering the LAN.

 

[Akaz1976]

"high Pass Filter"?!!!

could u post approx price and shops where i could get that stuff? (Radio Shack?)

Akaz

 

[LarryJoe]

Assuming you already have broadband at your PC and you are looking to add a tuner/cable, you need to be careful as the cable company has already split the Internet/CableTV signal somewhere in your house and then ran to to your PC. Therefore, you do not have quality "TV" running through that coaxial. The slitter and filter mentioned above is already on that line somewhere.

Your best bet is to back track and split an existing "TV" coaxial and run a separate cable. That's what I did.

LJ

 

[Akaz1976]

wow, thanx for the heads up there. would a gotten screwed there.

One thing tho, i took the cable outta my modem and poped into the TV-Tuner to check it and it worked!!. the picture was a bit blurry tho so maybe that filter thingy caused it?!! also maybe the thing wont work if i had bot net and TV hooked.

so i guess i will play it safe and split the cable that goes into the other TV. for my internet access is paramount.

Akaz

 

[LarryJoe]

That is the easiest and safest way to go. The line for your cable modem already has the "noise" of cable TV filtered out. Even though you are getting a signal, that is the best you will get no matter what you try and do with that connection. Split a separate cable from a known TV source.

LJ

 

[Noriaki]

I have a cable running to my computer, and I split it with a splitter like kornermi described and the quality is pretty ugly. I've tried 3 different splitters to no better effect...

I think LJ might have the right call on this....
The splitter doesn't seem to hurt my cable modem in any way, but the quality on the TV input is not so great...if you have a known TV signal split that...

 

[Praetor]

Maybe I'm doing something wrong, but I just took the line from outside and split it. One end goes to the living room, the other goes to the computer room.

In the computer room, I split it again with one end going to the modem and the other going to the TV Card. All using 5-900MHz splitters I picked up from Wal-Mart. Reception is as good as it has ever been and I've experienced no problems with my cable modem.

The cable company never came out to my house, I did it all.

 

[LarryJoe]

If the cable company did the install, they would have put a noise filter on the internet line. Right now you are getting good TV because this filter is not there and who knows if your interent could be even faster if you had this filter filtering out the noise from the "TV" portion of the stream.

IMO - priorities should be:

1)Cable Modem
2)Tuner

Do the cable modem right and then worry about the tuner separately.

LJ

 

[Akaz1976]

<< 5-1100 MHz -3.5dB >>




<< 5-900MHz >>



5 here i assume means CAT5 cable??!!. What does the rest of the stuff mean?? and the higher the number the better??!!

Akaz

 

[Howard]

5MHz to 900MHz

 

[Akaz1976]

and whats &quot;3.5dB&quot;??!!

thanx

 

[Praetor]

Bah. I'm just coming off of a 3-year exile to 56k land from blissfull T-1 dorm room. Right now, I'm perfectly happy with my speed. If pointers can be found on where to find this &quot;filter&quot; and where to place it, I'll listen, though.

 

[LarryJoe]

Whatever works for you, but there is a reason why cable companies use this filter. If I remember tonight, I will hop down my basement and get you a part number. I am sure you can buy it. Why did you install it yourself? Didn't your cable company offer free installation like 99% of them do? I got mine almost 3 years ago and installation was free, except for a NIC, which I had.

LJ

 

[Raincity]

Larryjoe is right on about having your modem on a seperate coax but the line noise filter only applies is your video portion of the siginal is in analog. If you have the digital system no line filter is needed. Your s/n ratio is also very important to keep the modem aquired to the network. As Larryjoe has stated, split your line right at the entrance of the home and leave your modem on its own line. These Radio Shack splliters are not going to do the job. You are going to need a Holland Electronics GHS 2f 5-1000mhz splitter. Your best bet is really to have the cable people come out and do it for you so you get a good quaility splitter and coax. Just unplugged your modem from the coax so the mac addresse does not show up on the network and call your cable tech support and tell them you are having intermintent trouble staying aquired to the network. They will send somebody out to check it out and will put your modem on a seperate line as a first step to fixing the problem. Then show them the video tuner in the pc and they will run a line to it also.

Rain

 

[Praetor]

I told them I didn't want them anywhere near my house or computer.

Seriously though, I had no desire to have them trampling around my house, I asked the rep what all was required, and all he said was &quot;an available cable jack by your computer, you've already got the network card installed and you're good with computers. You really don't need us to come out at all.&quot;

Not once was it mentioned to me that I had to use some sort of &quot;filter&quot; for my connection.

 

[Raincity]

Praetor, your highpass line filter is probally already installed. They are usually connect it right at the tap. If your picture looks fine and your modem runs fine. Dont worry about it then. Conditions and solutions vary for each individual case depending what the line level condititons are for each location.

Rain

 

[Erasmus-X]

You want to be using a signal &quot;coupler&quot; to split a signal if you have both cable TV and high-speed cable service, not a splitter. Splitters are passive, meaning that you're effectively cutting your original signal strength in half when using one. Signal couplers amplify the signal so that each coaxial output gets equal strength. I believe you can pick one of these up at a Radio Shack.

 

[Akaz1976]

well i got the splitter (says coupler on the box but no specs except 75ohm). 75ohm, 25 &amp; 3 feet coaxial cables. (all from RS)

I am gonna try it out. if i doesnt work then i will get the amplifier thingy they have at RS.

wish me luck, i will need it.

Akaz

 

[Zach]

For my cable modem they just use 2.5db two way splitters leading to a regular splitter and the cable modem. At my dad's he has some sort of filter for at least one of the TV's (his cable's in a crawlspace), but he two has a splitter. I think they are okay being passive, so long as they handle the high fequencies and drop only a few db's.