Question

Cable Coax splitter advice for minimum speed loss

Asked by: vcio

I am getting great speed from from cable service. (24mb down / 2mb up) But now I want to split the inbound line to feed some other jacks. I am looking for advice on specs for a splitter that will not degrade by internet connection.

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Asked On
2009-08-15 at 08:26:10ID24655252
Tags

cable

,

internet

,

splitter

,

amplifier

Topics

DSL Lines / Cable Internet

,

Networking Hardware

Participating Experts
4
Points
500
Comments
7

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Answers

 

by: ComputerTechiePosted on 2009-08-15 at 10:39:05ID: 25106198

 

by: wiscomPosted on 2009-08-15 at 12:39:01ID: 25106604

 

by: avcontrolPosted on 2009-08-16 at 03:46:33ID: 25108493

As long it is two-way(means signal can go back and forth)almost any will work, and better use one-to- two output. After conection , you shouold call ISP tech support, and ask them for signal string they seeing , modem is reciving- if it above normal, you can even try go with one-to-3 out, splittter.
If signal below normal, you will need ask ISP inrease signal string(they can do it from the pol, where cable go of to house), or if this is not workable- use "two-way" aplifier- them you will have much options to "split cables around".
http://www.linearcorp.com/audio_video_distribution.html#amplifiers
http://www.blondertongue.com
as well there is many other brands and models.
If ISP will tell  you that signal slighly below normal, you can leave as is. Other helpfull move to incease string a little- is make sure not to use RG59, but RG6, as well having RG6 is mandatory for HD signal.

 

by: thegofPosted on 2009-08-16 at 06:29:51ID: 25108933

Your cable modem opperates on normal CATV frequencies so typically a normal CATV splitter will be fine, but there are a few watchouts.

1. Only use a 1-to-2 splitter that has bi-directional capability. For every split you drop the available power by half. Since you want a clear signal split the cable as it enters the house 1-to-2 and put the cable modem on one side and any TV's on the other.  If you need to amplify the TV signals, put the amplifier on that leg. The "bi-directional" part is critical since you need to send signals back (upload).  This is also important if you have a digital cable box where you need to send "requests" to the cable company :)

2. Frequency in the past has only needed to go to about 900MHz.  The recent adoption of DOCSIS 3.0 though has extended the frequency range to 1.0GHz. See http://www.cable360.net/ct/strategy/emergingtech/34304.html for some details.  Thus you'll want to get a splitter capable of at least 1.0GHz range.

3. Quality.  While you might be able to get a splitter that works at the dollar store, don't always count on it.  On the flipside, you don't need to spend a ton of money for a name brand.  I've alsways had good luck with these. http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10422&cs_id=1042206&p_id=2872&seq=1&format=2  The frequency range is more than you need, but the price and build quality are both good.  

 

 

by: avcontrolPosted on 2009-08-16 at 08:23:39ID: 25109248

P.S.
There is bi-derectional 0ne-to-3 way  do exist.

 

by: thegofPosted on 2009-08-16 at 11:02:55ID: 25109746

Yes, there are one-to-three splitters but they have a higher power loss factor and the OP wanted the least impact on the internet line.  For this, an initial one-to-two split gives the maximum possible power to the cable modem, then the other branch can be split as needed to serve the TV's/DVR's etc.  Those can much more easily tolerate the loss, as well as are easier the deal with by aplification if absolutely needed.

So Line in -

Line in --- Splitter 1 ----> Cable Modem
               |
               +--- Splitter 2 ----> TV1
                       |
                       +-----------> TV2
 
or Splitter 2 coulf be a one-to-three or one-to-four, amplifier, whatever.
                                              
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Select allOpen in new window

 

by: wiscomPosted on 2009-08-16 at 11:31:07ID: 25109850

Hi,

Hi,

Go for a 2-way splitter;

http://shopper.cnet.com/av-cables/monster-cable-2-way/4014-7889_9-32143348.html

These are the specs, can't beat !!!

The DB Loss per output is:

5MHz-1GHz: -3.4dB
1GHz- 2GHz: -4.9dB

A/


A/

20120131-EE-VQP-002

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