Analogue TV distribution help request - Page 2

badboy · 23-12-2003, 12:20

Making any changes or splitting cables is not recommended in any shape or form.

It causes untold problems for other customers, yourself and obviously the cable company.

It produces what is called "ingress noise", ingress noise going back onto the network is not a good thing.

GeezerNug · 23-12-2003, 13:15

Quote:

Originally Posted by badboy

Making any changes or splitting cables is not recommended in any shape or form.

It causes untold problems for other customers, yourself and obviously the cable company.

It produces what is called "ingress noise", ingress noise going back onto the network is not a good thing.

Well, it's OK if it's done right, otherwise it couldn't be installed!

But I know what you mean.

Thanks to everybody who ploughed through this thread. It's all done now thanks to some excellent help from ntltech32. I'd like to say he's a jolly good chap and all-round good egg and I owe him several pints.

Merry Christmas everybody!

Cheers
John

mjacklin · 28-12-2003, 20:09

Hi all - a very timely topic as I've just got hold of an XP Media Centre PC and find myself in the position of looking to replace the current TV/FM splitter which feeds my cable modem in my office with a TV/TV splitter instead. Does anyone know if it is possible to buy the correct type of splitter in any of the standard online/regular stores?

I believe these guys produce the ones I need but I don't know who stocks them.
http://www.technetix.plc.uk/products/asec.htm

Any help would be much appreciated.

Cheers,
Mark

GeezerNug · 29-12-2003, 14:31

Quote:

Originally Posted by mjacklin

Hi all - a very timely topic as I've just got hold of an XP Media Centre PC and find myself in the position of looking to replace the current TV/FM splitter which feeds my cable modem in my office with a TV/TV splitter instead. Does anyone know if it is possible to buy the correct type of splitter in any of the standard online/regular stores?

I believe these guys produce the ones I need but I don't know who stocks them.
http://www.technetix.plc.uk/products/asec.htm

Any help would be much appreciated.

Cheers,
Mark

HI Mark,

Welcome to the forum!

If you haven't noticed, I've put some info in a PM.

Cheers
John

ntltech32 · 29-12-2003, 18:22

hiya mark, you should get what you require in the posty..

thanks gezzanug for the nice comments =)

merry xmas to you all

Shaun · 29-12-2003, 19:34

What a great thread, just shows there are still some at Ntl that care.

Well done everyone,

ntltech32 · 29-12-2003, 23:30

Quote:

Originally Posted by dellwear

What a great thread, just shows there are still some at Ntl that care.

Well done everyone,

hehe thanks !!

ntltech32 · 30-12-2003, 10:46

Quote:

Originally Posted by badboy

Making any changes or splitting cables is not recommended in any shape or form.

It causes untold problems for other customers, yourself and obviously the cable company.

It produces what is called "ingress noise", ingress noise going back onto the network is not a good thing.

I must say this is spot on! but with the correct equipment used and also the signal levels correct there is not a problem. ingress can also be caused by a lose "F" connector on the back of your stb, sacm etc where it leaks signal..

mjacklin · 30-12-2003, 12:43

Yes - a big thanks to GeezerNug for confirming my thoughts and a huge thank you to ntltech32 for coming up with the goods (arrived this morning). What a pleasure getting such excellent help in a Forum - I may have to stick around!

Happy New Year to all!

Quote:

Originally Posted by ntltech32

I must say this is spot on! but with the correct equipment used and also the signal levels correct there is not a problem. ingress can also be caused by a lose "F" connector on the back of your stb, sacm etc where it leaks signal..

Jon_ · 30-12-2003, 13:52

hi, soz to bump in on this, just wondering if something like product code QQ69A at www.maplin.co.uk would be a suitable splitter? ive got a pc tv card and i cant for the life of me get a decent anologe picture from my wall mounted areal and wondering if a cable analoge would work better

ntltech32 · 30-12-2003, 14:28

Quote:

Originally Posted by Jon_

hi, soz to bump in on this, just wondering if something like product code QQ69A at www.maplin.co.uk would be a suitable splitter? ive got a pc tv card and i cant for the life of me get a decent anologe picture from my wall mounted areal and wondering if a cable analoge would work better

yeah that would work.. how ever you can get a splitter cheaper on ebay although you will lose 3.5db signal loss per connection.

your best bet is a vocomm twin data/tv isolated splitter pm me if you require one.

Stu038 · 30-12-2003, 14:43

Quote:

Originally Posted by Jon_

just wondering if something like product code QQ69A at www.maplin.co.uk would be a suitable splitter?

Errr sorry, but that one is probably not so good, the sub split may cause problems if a SCAM or STB is ever connected to that leg at a later date as some regions use frequencies upto 41.5MHz.

Quote:

Originally Posted by ntltech32

your best bet is a vocomm twin data/tv isolated splitter pm me if you require one.

A lot better idea

Jon_ · 30-12-2003, 16:24

PM sent

Since its been nearly 6 years since i did my a level in physics, is there a guide or something out there that would show me in more 2easy to understand" terms what the affect a 3.5db loss or the frequencies used and how they affect things, as atm those figures went totaly over my head!

ntltech32 · 30-12-2003, 17:21

Quote:

Originally Posted by Jon_

PM sent

Since its been nearly 6 years since i did my a level in physics, is there a guide or something out there that would show me in more 2easy to understand" terms what the affect a 3.5db loss or the frequencies used and how they affect things, as atm those figures went totaly over my head!

hehe most sacm's (stand alone cable modems) run on frequencies 402.775 mhz carrier and i think 411.000 for return path.

the level at which a modem operates correctly is about -1 dbv @ 402.775 and flat -0 dbv on 579.000 and 835.000 and about +12 dbv on 128.000 but not everyone's is set correctly. the tolerance is about 6 dbv - and about 4 dbv + on the 402.775....... lowest 128.000 can be is about +4 dbv

where as digital runs on a multiplex of signals...

128.000
579.000 (northants) 811.000 (Coventry) Default Freq
835.000 Return Path
411.000 carrier

and many more...

digital have to be as close to -0 dbv flat across the freq otherwise slope and gains will make it impossible to become 5 connected and then for interactive services to work, boxes freezing and jumping.. locking etc etc

Fraggle911 · 29-01-2004, 15:14

Hi Folks

Forgive me jumping in here, but I have a similar situation, and one of the people mentioned a "vocomm twin data/tv isolated splitter", does anyone know where you can get info on these, and possibly buy one?

Cheers