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NickySantoro
Guest
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 Posted:
Fri Sep 23, 2005 12:09 am Post subject:
Splitter question |
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I have to run some RG6 in my daughter's new apartment. The coax line
comes up inside the closet. In order to supply two TVs and a modem is
it best to use a two way splitter and then split the TV line again or
will a three way splitter be OK?
TIA
DFB |
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Warren
Guest
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| Posted:
Fri Sep 23, 2005 12:36 am Post subject:
Re: Splitter question |
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NickySantoro wrote:
| Quote: | I have to run some RG6 in my daughter's new apartment. The coax line
comes up inside the closet. In order to supply two TVs and a modem is
it best to use a two way splitter and then split the TV line again or
will a three way splitter be OK?
|
If you look at the labels on the outputs of a three-way splitter, you'll
notice that it's essentially the same thing. The input is split once, with
one leg going straight to an output, and the other leg is split again before
going to the outputs. Make sure the modem is on the leg that was split only
once, and make sure you have a splitter with a wide enough frequency range.
--
Warren H.
==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Your guide to Network Television's Fall Premiers:
http://www.holzemville.com/television/fall2005.html |
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Bill M.
Guest
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| Posted:
Fri Sep 23, 2005 12:40 am Post subject:
Re: Splitter question |
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On Thu, 22 Sep 2005 15:09:44 -0400, NickySantoro
<NickySantoro@optonline.net> wrote:
| Quote: | I have to run some RG6 in my daughter's new apartment. The coax line
comes up inside the closet. In order to supply two TVs and a modem is
it best to use a two way splitter and then split the TV line again or
will a three way splitter be OK?
TIA
DFB
|
I would use a good quality 3-way splitter, if that's the most
convenient in your situation. Each splitter, and each connection, adds
it's own bit of insertion loss, so a single 3-way might be more
efficient than a pair of 2-ways. The splitter should have an output
labeled -3dB (or possibly -3.5dB) and two outputs labeled -7dB (or
-7.5dB). The -3dB output should go to the cable modem, and the other
two to the TV's.
--
Bill |
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Robert Nichols
Guest
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| Posted:
Fri Sep 23, 2005 2:58 pm Post subject:
Re: Splitter question |
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In article <mv16j1lep4mb2gjmkqp3eptu6rsr63g7rc@4ax.com>,
Bill M. <wbillups@hotmail.com> wrote:
:
:I would use a good quality 3-way splitter, if that's the most
:convenient in your situation. Each splitter, and each connection, adds
:it's own bit of insertion loss, so a single 3-way might be more
:efficient than a pair of 2-ways. The splitter should have an output
:labeled -3dB (or possibly -3.5dB) and two outputs labeled -7dB (or
:-7.5dB). The -3dB output should go to the cable modem, and the other
:two to the TV's.
Got a source for such a splitter, quantity ONE? I can only find them
at places that want to sell me a case load. Retail stores don't seem
to carry them.
--
Bob Nichols AT comcast.net I am "rnichols42" |
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Lucas Tam
Guest
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| Posted:
Fri Sep 23, 2005 4:20 pm Post subject:
Re: Splitter question |
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NickySantoro <NickySantoro@optonline.net> wrote in
news:6sv5j1lsdj79c882mrr92i5150frc423r4@4ax.com:
| Quote: | I have to run some RG6 in my daughter's new apartment. The coax line
comes up inside the closet. In order to supply two TVs and a modem is
it best to use a two way splitter and then split the TV line again or
will a three way splitter be OK?
|
I would use a 3-way splitter or a bi-directional amp. You can pick up a
multi-output bi-directional amp at radioshack for ~25.00.
A bi-directional amp is important if you have digital services on the line
(i.e. cable modem/digital TV).
--
Lucas Tam (REMOVEnntp@rogers.com)
Please delete "REMOVE" from the e-mail address when replying.
Newmarket Volvo Sucks! http://newmarketvolvo.tripod.com |
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Percival P. Cassidy
Guest
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| Posted:
Fri Sep 23, 2005 4:20 pm Post subject:
Re: Splitter question |
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On 09/23/05 10:58 am Robert Nichols tossed the following ingredients
into the ever-growing pot of cybersoup:
| Quote: | :I would use a good quality 3-way splitter, if that's the most
:convenient in your situation. Each splitter, and each connection, adds
:it's own bit of insertion loss, so a single 3-way might be more
:efficient than a pair of 2-ways. The splitter should have an output
:labeled -3dB (or possibly -3.5dB) and two outputs labeled -7dB (or
:-7.5dB). The -3dB output should go to the cable modem, and the other
:two to the TV's.
Got a source for such a splitter, quantity ONE? I can only find them
at places that want to sell me a case load. Retail stores don't seem
to carry them.
|
Lowe's? Home Despot? Radio Schlock? Menards? (if they are in your area)
Perce |
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Rick Kunath
Guest
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| Posted:
Sat Sep 24, 2005 2:58 am Post subject:
Re: Splitter question |
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Warren wrote:
| Quote: | If you look at the labels on the outputs of a three-way splitter, you'll
notice that it's essentially the same thing. The input is split once, with
one leg going straight to an output, and the other leg is split again
before going to the outputs. Make sure the modem is on the leg that was
split only once, and make sure you have a splitter with a wide enough
frequency range.
|
The only gotcha when shopping for a 3-way splitter is that there are
versions made with an equal split.
These will be marked 5-5-5 dB and not the 3.5-7-7 dB model you need.
As was mentioned up the thread, a 3.5-7-7 bD 3-way splitter is a 2-way
feeding another 2-way in the same package.
They work well.
Rick Kunath |
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Gary
Guest
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| Posted:
Sat Sep 24, 2005 6:53 am Post subject:
Re: Splitter question |
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"Lucas Tam" <REMOVEnntp@rogers.com> wrote in message
news:Xns96DA70E6DE816nntprogerscom@127.0.0.1...
| Quote: |
I would use a 3-way splitter or a bi-directional amp. You can pick up a
multi-output bi-directional amp at radioshack for ~25.00.
A bi-directional amp is important if you have digital services on the line
(i.e. cable modem/digital TV).
|
Technically, these amps are not "bi-directional." They are an amplifier in
the downstream direction with a bypass path to allow signals to flow
upstream. You don't want an upstream amp, as it will interfere with the
power control system in modems and set-tops. The bypass path also adds a
little loss to the upstream path.
While an amp sounds like a good idea, it isn't always helpful. If the
signal is strong enough when it enters the home, and amp can end up
overloading the receivers causing more harm than good.
For example, if you put a 15dB amp ahead of a 7dB splitter tree the signal
at the receiver will be 8dB hotter than what entered the home.
On top of all this, amplifiers reduce SNR as well, so they can cause
problems if the feed has poor SNR.
It's best not to install an amplifier unless other methods to improve
signals have failed, and then only after SNR and power measurements have
been taken.
-Gary |
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Robert Nichols
Guest
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| Posted:
Sat Sep 24, 2005 3:56 pm Post subject:
Re: Splitter question |
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In article <eAVYe.5988$P7.1562@fe06.lga>,
Percival P. Cassidy <Nobody@NotMyISP.net> wrote:
:On 09/23/05 10:58 am Robert Nichols tossed the following ingredients
:into the ever-growing pot of cybersoup:
:
:> :I would use a good quality 3-way splitter, if that's the most
:> :convenient in your situation. Each splitter, and each connection, adds
:> :it's own bit of insertion loss, so a single 3-way might be more
:> :efficient than a pair of 2-ways. The splitter should have an output
:> :labeled -3dB (or possibly -3.5dB) and two outputs labeled -7dB (or
:> :-7.5dB). The -3dB output should go to the cable modem, and the other
:> :two to the TV's.
:>
:> Got a source for such a splitter, quantity ONE? I can only find them
:> at places that want to sell me a case load. Retail stores don't seem
:> to carry them.
:
:Lowe's? Home Despot? Radio Schlock? Menards? (if they are in your area)
I find 2-way splitters and 4-way splitters. Can't seem to find anyone
who has any type of 3-way. I've tried Radio Shack, Fry's, Best Buy,
Circuit City. I just checked Radio Shack's web site -- no 3-way
splitters. Haven't tried Home Depot or Menards -- I'll take a look,
but I'm not too hopeful.
Tnx anyway.
--
Bob Nichols AT comcast.net I am "rnichols42" |
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Andrew Rossmann
Guest
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| Posted:
Sun Sep 25, 2005 2:35 am Post subject:
Re: Splitter question |
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[This followup was posted to comp.dcom.modems.cable and a copy was sent
to the cited author.]
In article <dh3suv$ao8$1@omega-3a.right.here>,
SEE_SIGNATURE@localhost.localdomain.invalid says...
| Quote: | I find 2-way splitters and 4-way splitters. Can't seem to find anyone
who has any type of 3-way. I've tried Radio Shack, Fry's, Best Buy,
Circuit City. I just checked Radio Shack's web site -- no 3-way
splitters. Haven't tried Home Depot or Menards -- I'll take a look,
but I'm not too hopeful.
|
Don't overlook Target, WalMart, KMart, etc.. You can be surprised what
they carry.
They may not be well marked, though. Most look a bit like this (you
need a fixed-pitch font to read this well):
1 2 3
| | |
+-----------+
| |
+-----------+
|
in
#1 in the drawing would be the -3.5db output. The other two would be
-7.0db. Just make certain it's rated for at least 5-900MHz, preferably
to 1000MHz (1GHz) or more. DO NOT use one rated only down to 42 or 45 or
similar. That may prevent your cable box or modem from talking back.
--
If there is a no_junk in my address, please REMOVE it before replying!
All junk mail senders will be prosecuted to the fullest extent of the
law!!
http://home.att.net/~andyross |
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Robert Nichols
Guest
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| Posted:
Sun Sep 25, 2005 2:41 am Post subject:
Re: Splitter question |
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Note: E-mailed *and* posted.
In article <dh3suv$ao8$1@omega-3a.right.here>,
Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> wrote:
:In article <eAVYe.5988$P7.1562@fe06.lga>,
:Percival P. Cassidy <Nobody@NotMyISP.net> wrote:
::On 09/23/05 10:58 am Robert Nichols tossed the following ingredients
::into the ever-growing pot of cybersoup:
::
::> :I would use a good quality 3-way splitter, if that's the most
::> :convenient in your situation. Each splitter, and each connection, adds
::> :it's own bit of insertion loss, so a single 3-way might be more
::> :efficient than a pair of 2-ways. The splitter should have an output
::> :labeled -3dB (or possibly -3.5dB) and two outputs labeled -7dB (or
::> :-7.5dB). The -3dB output should go to the cable modem, and the other
::> :two to the TV's.
::>
::> Got a source for such a splitter, quantity ONE? I can only find them
::> at places that want to sell me a case load. Retail stores don't seem
::> to carry them.
::
::Lowe's? Home Despot? Radio Schlock? Menards? (if they are in your area)
:
:I find 2-way splitters and 4-way splitters. Can't seem to find anyone
:who has any type of 3-way. I've tried Radio Shack, Fry's, Best Buy,
:Circuit City. I just checked Radio Shack's web site -- no 3-way
:splitters. Haven't tried Home Depot or Menards -- I'll take a look,
:but I'm not too hopeful.
To update, I've found that Home Depot and Menards do have 3-way
splitters, but only the balanced (-5.7db on all 3 ports) type. I
still can't find the unbalanced (-3.5db, -7.5db, -7.5db) type except
in wholesale lots.
--
Bob Nichols AT comcast.net I am "rnichols42" |
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NickySantoro
Guest
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| Posted:
Sun Sep 25, 2005 4:24 am Post subject:
Re: Splitter question |
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On Thu, 22 Sep 2005 15:09:44 -0400, NickySantoro
<NickySantoro@optonline.net> wrote:
| Quote: | I have to run some RG6 in my daughter's new apartment. The coax line
comes up inside the closet. In order to supply two TVs and a modem is
it best to use a two way splitter and then split the TV line again or
will a three way splitter be OK?
TIA
DFB
Many thanks to all who replied. I've gotten quite an education. The |
three way I have in my junk box shows no differentiation but then it
predates cable modems by a good bit. I'll seek a 3 way that has the
requisite modalities as mentioned. Fortunately (?) Radio Schlock is
ubiquitous in my AO.
Again, many thanks to all.
DFB |
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Eric
Guest
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| Posted:
Sun Sep 25, 2005 4:27 am Post subject:
Re: Splitter question |
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| Chase down a cable tech. Most of us will just give you one. |
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Bill M.
Guest
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| Posted:
Sun Sep 25, 2005 8:05 am Post subject:
Re: Splitter question |
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On 24 Sep 2005 16:27:41 -0700, "Eric" <egrumling1@hotmail.com> wrote:
| Quote: | Chase down a cable tech. Most of us will just give you one.
|
Good point. I've gotten splitters and quite a few freshly-made cables
of various lengths just by asking a tech who happened to be in the
neighborhood.
--
Bill |
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Robert Nichols
Guest
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| Posted:
Fri Sep 30, 2005 9:25 pm Post subject:
Re: Splitter question |
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In article <dh52o3$hma$1@omega-3a.right.here>,
Robert Nichols <SEE_SIGNATURE@localhost.localdomain.invalid> wrote:
:
:To update, I've found that Home Depot and Menards do have 3-way
:splitters, but only the balanced (-5.7db on all 3 ports) type. I
:still can't find the unbalanced (-3.5db, -7.5db, -7.5db) type except
:in wholesale lots.
OK, I finally got one by simply stopping in at my local Comcast office
and asking. The nice lady behind the counter wasn't sure they had any,
but dug around in a bin of stuff for a moment and handed one to me.
--
Bob Nichols AT comcast.net I am "rnichols42" |
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