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Cable TV and coax splitters Brent Bolin 08-02-2007
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Posted by Noozer on August 3, 2007, 2:46 pm

> On Thu, 2 Aug 2007 10:37:34 -0500, "Steve Barker"
>
>>no, get a two way and put it in the existing tv line.
>>
>>
>
> I think the two way should come first, so the signal to the cable
> modem has to pass through only one splitter.

But that could throw off a marginal signal to the modem.

A two way splitter will not have the same effect as the existing 4 way.



Posted by Noozer on August 2, 2007, 2:14 pm

> Hi All,
>
> Currently have 3 TV's and Comcast cable modem. The splitter in the
> cross space has a total of 5 ports.
>
> 1. Comcast in
> 2. Cable modem
> 3. TV
> 4. TV
> 5. TV/DVR
>
> I would like to add an additional TV.
>
> Can I just purchase a 6 port cable splitter ?

NO!

Take one of your TV's off and add another splitter.

> Will it reduce the quality of the signal ?

Yes. Every time you split the signal you will have some loss. Whether or not
it's noticable depends on the signal and hardware you use.

> Any input would be appreciated.

You do not want to add any more loss before your cable modem. A six way
splitter will cause more loss to all the devices connected to it.

Also you do NOT want to use an amplifier as they also amplify noise and
usually block return signals, breaking the cable modem connection.



Posted by Mark Lloyd on August 2, 2007, 3:08 pm

>
>> Hi All,
>>
>> Currently have 3 TV's and Comcast cable modem. The splitter in the
>> cross space has a total of 5 ports.
>>
>> 1. Comcast in
>> 2. Cable modem
>> 3. TV
>> 4. TV
>> 5. TV/DVR
>>
>> I would like to add an additional TV.
>>
>> Can I just purchase a 6 port cable splitter ?
>
>NO!
>
>Take one of your TV's off and add another splitter.
>
>> Will it reduce the quality of the signal ?
>
>Yes. Every time you split the signal you will have some loss. Whether or not
>it's noticable depends on the signal and hardware you use.
>
>> Any input would be appreciated.
>
>You do not want to add any more loss before your cable modem. A six way
>splitter will cause more loss to all the devices connected to it.
>

That's why I suggested putting the 2 way FIRST.

>Also you do NOT want to use an amplifier as they also amplify noise and
>usually block return signals, breaking the cable modem connection.
>

An amplifier may be desirable, but try it without one at first. Don't
put an amplifier on the cable modem signal.
--
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

Posted by Noozer on August 3, 2007, 2:49 pm
> That's why I suggested putting the 2 way FIRST.

And that would be wrong. A two way splitter has 3.5db of loss to each
output. A four way has 7db of loss to each output. No idea how much loss
there is in a five way... 7 on three taps and 10 on two?

By moving the modem onto a two way splitter, you're hitting the modem
3.5db's hotter and that could be enough to knock it offline.

Bottom line is don't change it if you don't have to.
>
>>Also you do NOT want to use an amplifier as they also amplify noise and
>>usually block return signals, breaking the cable modem connection.

> An amplifier may be desirable, but try it without one at first. Don't
> put an amplifier on the cable modem signal.

An amp is never desireable. If the signal in is really that bad then the
cable company should be troubleshooting it. THEY will install an amp if it's
needed.



Posted by Brent Bolin on August 3, 2007, 4:37 pm
> > That's why I suggested putting the 2 way FIRST.
>
> And that would be wrong. A two way splitter has 3.5db of loss to each
> output. A four way has 7db of loss to each output. No idea how much loss
> there is in a five way... 7 on three taps and 10 on two?
>
> By moving the modem onto a two way splitter, you're hitting the modem
> 3.5db's hotter and that could be enough to knock it offline.
>
> Bottom line is don't change it if you don't have to.
>
>
>
> >>Also you do NOT want to use an amplifier as they also amplify noise and
> >>usually block return signals, breaking the cable modem connection.
> > An amplifier may be desirable, but try it without one at first. Don't
> > put an amplifier on the cable modem signal.
>
> An amp is never desireable. If the signal in is really that bad then the
> cable company should be troubleshooting it. THEY will install an amp if it's
> needed.

Thanks all for your input. Now you've really confusing me with the
facts. Guess I just need to buy a new house.

Kidding :)

Cable in --> 2-way-splitter . One leg of that goes to the cable
modem. Use whatever I decide size splitter on the other leg

Done deal.

tku


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