ONE LNB CABLE, TWO RECEIVERS.

Irishgoatman

Is it possible, using a splitter, to run two receivers from the one cable?.

Obviously I'm not on sky. I want to be able to record on one using a dvd recorder whilst watching another channel on the other. On the face of it, not complicated.

Simple question, I hope, :

Will it work !!!.

decor58

No, a splitter won't work, you need a separate cable/connection for each receiver.

Thurston?

Irishgoatman wrote: »

Is it possible, using a splitter, to run two receivers from the one cable?.

Obviously I'm not on sky. I want to be able to record on one using a dvd recorder whilst watching another channel on the other.

It won't work fully, you'd be limited in the amount of channels you can watch when you're recording something.

Might do though, if you definitely don't want another LNB feed. Use a splitter like this one, with power-passing on 1 port, & the recording box connected to this port, so it's the 'master', in control of LNB switching. (I'm assuming both boxes will be connected to the same TV, so there won't be a need for the non-recording box to have independent control of the LNB.)

Atlantic Dawn

Have you a satellite receiver with a dvd recorder built in, you sure it's not terrestrial tv it records?

If you had 2 satellite receivers and a splitter for the cable from LNB only one receiver will work at any one time, if you turn the other on at the same time it will knock out the other or else itself won't work as only one can run the single LNB.

Thurston?

Atlantic Dawn wrote: »

... If you had 2 satellite receivers and a splitter for the cable from LNB only one receiver will work at any one time, if you turn the other on at the same time it will knock out the other or else itself won't work as only one can run the single LNB.

The 2nd receiver won't 'knock out' the 1st, if he uses a splitter like I linked to in my previous post &, if they're both being viewed on the same TV, it won't matter if the 2nd box can't power the LNB.

jimmycrackcorm

decor58 wrote:

No, a splitter won't work, you need a separate cable/connection for each receiver.

I'm curious why it doesn't work, compared to splitting and boosting terrestrial TV signals.

Gerry Wicklow

jimmycrackcorm wrote: »

I'm curious why it doesn't work, compared to splitting and boosting terrestrial TV signals.

See my explanation here.

Thurston?

jimmycrackcorm wrote: »

I'm curious why it doesn't work, compared to splitting and boosting terrestrial TV signals.

It will work in a limited way. The 1st stage of tuning in the channel to be viewed is actually in the LNB, at the dish, & depending which channel is selected, the tuner in the receiver selects the polarity of signal received by the LNB to be sent down the cable, & also the electronics in the LNB process the higher & lower parts of the satellite spectrum separately, & the tuner selects this also.

Irishgoatman

Thanks for all these replies.

Let me just clear something up and clarify others.
I'm not talking about terrestial T.V. For watching Irish channels I have an expensive Saorview box that will record 2 channels whilst I watch a 3rd one. How often is this needed with Irish programmes !!!!.

For free to air/satellite channels I use a non-subscription sky+ box, this is linked to an external DVD recorder enabling me to record programmes to removeable disc from time to time (music, films etc).

The reasons for wanting to link another receiver and connect it to another external DVD recorder are: A/, I have been given another sat receiver and I have a spare recorder that no longer records on its HD but does record onto discs and B/, at times, like tonight for example, there are programmes on BBC1 and CH4 at the same time which I would like to watch.
As I would use the newest box just for recording to disc it doesn't need to be connected to the TV at the time of recording. The TV has a built-in disc player for watching when required.

I did all the previous installation myself but now, at the age of 71 and not in perfect health, I am not in a position to clamber through the attic installing another feed from the LNB and the amount of recording I'm likely to do would not justify the expense of employing a firm to do the installation.

Reading Thurston?'s posts (thank you) it looks as though no harm would be done if I tried this, I hope, and at very little expense. Just the small cost of a splitter and 2 short leads.

Again, thanks and comments on the above will be appreciated.

Irishmale0399

Hey Irishgoatman...

You can do what you want with a so called stacker De-Stacker. Dont ask me the finer details because I dont know them but I know my old neighbour was using one of them and was very happy.

http://www.satellitesuperstore.com/stacker_destacker.htm

Alternatively you could use a single cable distribution system (its more or less the same) and seems to be used by Sky when installing blocks of flats.

https://en.wikipedia.org/wiki/Single_cable_distribution

Thurston?

Irishgoatman wrote: »

... The reasons for wanting to link another receiver and connect it to another external DVD recorder are: A/, I have been given another sat receiver and I have a spare recorder that no longer records on its HD but does record onto discs and B/, at times, like tonight for example, there are programmes on BBC1 and CH4 at the same time which I would like to watch.

That's a combo that would work, as (for standard def. anyway), Channel 4, & some BBC regions (but not NI) are on low band, horizontal transponders, so both receivers could tune in.

Just make sure the splitter only has 1 power-passing leg, so switching on the 2nd box can't mess up what the 1st is recording. Hopefully also your system is in good shape, & the signal strong enough to survive splitting losses.

Irishmale0399 wrote: »

You can do what you want with a so called stacker De-Stacker ...

Alternatively you could use a single cable distribution system (its more or less the same) and seems to be used by Sky when installing blocks of flats.

Stacker/Destacker still needs a 2nd connection to the LNB. Single cable distribution, apart from other hardware, needs compatible receivers.

Irishgoatman

Thurston? wrote: »

That's a combo that would work, as (for standard def. anyway), Channel 4, & some BBC regions (but not NI) are on low band, horizontal transponders, so both receivers could tune in.

Just make sure the splitter only has 1 power-passing leg, so switching on the 2nd box can't mess up what the 1st is recording. Hopefully also your system is in good shape, & the signal strong enough to survive splitting losses.

Many thanks for this Thurston?, looks as though it's def worth a try. So would it matter which box was connected to the power-passing leg?. How do I ensure that one doesn't mess recording on the other? and last question (I hope) in the very unlikely event that I tried to record on both boxes at the same time would it work?

My system is in very good shape, strong signal unless a storm comes along and I use a London sky card so don't need to worry about N.I. BBC.

My Daughter thinks I'm obsessed with modern technology but I say if it's there why not play with it .

Thurston?

Irishgoatman wrote: »

So would it matter which box was connected to the power-passing leg?. How do I ensure that one doesn't mess recording on the other? and last question (I hope) in the very unlikely event that I tried to record on both boxes at the same time would it work?

Connect the box you prefer to use for recording to the power-passing leg, as this will be the box that powers the LNB, & will determine which block of channels can be tuned. (13/18 volts DC for vertical/horizontal polarity, 22 KHz tone on/off for high band/low band.)

The DC power & 22 KHz tone from the 2nd receiver will be blocked by the splitter, so it can't switch the LNB to downconvert a different block of channels. It won't be a problem to record with the 2nd box.

If you look at this page, it shows the frequencies & polarities of the transponders the channels are carried on, with low band being below 11700 MHz, & high band above.

Irishgoatman

Thanks for all of this.

All I have to do now is get a splitter and make up/buy 2 short leads.

I will report back ASAP so watch this space as they say.

Irishgoatman

I'm back.

Thanks to everyone for their input and a special thanks to Thurston?.

Your last post Thurston? was spot on. All up and running.

Yes the box connected through the power-passing leg of the splitter controls the batch of channels can be watched through the second box, so I need to make a list showing the links or go on a memory training course.
At the moment I have snooker on BBC2 on one box and BBC news on the other.

A shop owner in Claremorris, my nearest town, told me that it could not be done. It's good that I seldom take no for an answer.

As always Boardies came up with the way forward.:D

Capt'n Midnight

jimmycrackcorm wrote: »

I'm curious why it doesn't work, compared to splitting and boosting terrestrial TV signals.

Some radios have a switch to choose bands.
Longwave / Medium Wave / Shortwave / FM

The LNB on the dish is similar. Each cable can have one of four groups of channels. This is why you get LNB's with more outputs. If the dish is accessible then the best option would to stick on a quad band LNB.


If you want to go down the route of mixing and matching channels then there are two splits. You can only receive H or V at one time. You can only receive the lower frequencies or the upper ones. And most channels on on the lower ones 10.70–11.70 GHz, low

BUT if you can change the type of LNB in the receiver you to something other than a universal or change the change frequency from 11.7GHz you might be able to extend the low band up a bit. Otherwise 11.70–12.75 GHz = high


Have a look at http://www.lyngsat.com/Astra-2E-2F-2G.html
Notice that many of the regional versions of C4/ITV/BBC are on H and V so you'd just need two alternatives for the main terrestrial channels on the slave receiver.

Also UTV is later than ITV for films so there's a good few times you can use it as a +1 and have HD, BBC NI is handy for an extra half hour too so you can jump around. And there is always the old trick of switching mid-program to something else and then hopping back to the +1 channel to continue where you left off. BUT beware some stuff isn't shown on +1 channels for legal or rights reasons.


If you've only got access to a single cable because it's an apartment SCD Single Cable Distribution system then there may be another option. No idea if this works but looks interesting - using a loop back cable for the second tuner.
https://www.avforums.com/threads/foxsat-hdr-single-cable-distribution-unicable.1633223/
http://forums.digitalspy.co.uk/showpost.php?p=58150198&postcount=121

Irishgoatman

Just had a look at the links posted by Capt'n Midnight and understood virtually nothing!.

Set up my system as per Thurston? 's directions and it works. Yes whatever you are watching/recording on the main receiver controls the channels you can watch on the slave but so far no problem. I'm, at the moment, recording a prog on the main and watching the snooker on the slave. Perfect.

Capt'n Midnight

There are two polarisations Horizontal and Vertical. H and V.
There are two frequency bands with a small overlap.

Take these with a pinch of salt, I haven't checked as that would need a re-tune.

If you are on the LOW BAND

If you set the LNB to H

BBC Four HD
BBC NEWS HD
CBeebies HD
BBC One ScotHD
BBC One Wal HD
ITV Wales HD
ITV HD
ITV HD (different region)
50290 (= CNN HD)

Channel 4 ( + 1 on V)
More4 + 1 More 4 on V
Film4
Film4 + 1
Channel 4 +1 on V
BBC Four
CBeebies
BBC One Lon (others inc HD on V)
BBC One CI
BBC One East W
BBC One West
BBC Two Eng (other regions on V)
BBC RB 1
BBC ALBA
BBC One N West
BBC One NE&C
BBC One S East
BBC One Scot
BBC One Yorks
BBC Two Scot
ITV2+1 ITV2 on V
ITVBe+1
Channel 5
Channel 5 +1
5 USA
5 USA +1
5STAR
5STAR+1
Channel 5+24
Spike
Al Jazeera Eng
Inspiration TV
CNN
BET
Movies4Men
Movies4Men+1
Frontrunner
IRISH TV
NOW Music
KeepItCountry
Colors
TJC Choice
Craft Channel
Travel Ch +1
CHANNELS24
Vintage TV
CHANNEL AKA
Rishtey
DAYSTAR TV
IDEAL EXTRA
Craft Extra
Ideal World
Create & Craft
True Crime
Magic
JewelleryMaker
euronews
CCTV-NEWS
heart tv
CAPITAL TV
CHILLED
CLUBLAND TV
GR SHOP
Rocks and Co1
HIGH STREET TV
Hochanda


You MIGHT get these if you disable the LNB switching over
I haven't tested as it means a re-tune
Challenge
Challenge +1
Forces TV


On V it's these
BBC One NI HD
BBC Two HD BBC Two Eng on H
CBBC HD
BBC One HD
UTV HD
STV HD
Channel 4 HD
RT HD
NHK WORLD HD

Channel 4 + 1 (Channel 4 is on H so you can juggle)
E4
E4 + 1
More4 (More4 +1 is on H so you can juggle)
Channel 4 + 1
ITV2 +1 on H
ITV4
ITVBe
ITV4+1
CITV
ITV
BBC Parliament
BBC One E Mid
BBC One East E
BBC One W Mid
BBC One Wales
BBC One Yk&Li
BBC Two Wales
BBC Two NI
BBC One NI
BBC NEWS
CBBC
BBC One NI
BBC One Oxford
BBC One South
BBC One S West
BBC Two NI
UTV
ITV3
ITV3+1
10240
ITV
STV
STV
STV
STV
UTV
ITV
ITV +1
ITV3
ITV3+1
4seven
B4U Music
Revelation
GOD Channel
True Ent
True Drama
True Crime +1
True Movies 1
True Movies 2
Chart Show TV
The Vault
ChartShowDance
Starz TV
POP
Kix
Tiny Pop
Kix +1
Tiny Pop +1
S4C Digidol
CBS Drama
CBS Reality
CBS Reality +1
CBS Action
horror channel
horror ch+1
BABESTATION
Food Network
Food Network+1
PBS America
YourTV
France 24
Bloomberg TV
CNBC
TalkingPics TV
Travel Channel
truTV
JML Direct
ISLAM CHANNEL
Sonlife TV
TJC
Thane
Fashion One



You MIGHT get this if you disable the LNB switching over
I haven't tested as it means a re-tune
VIVA




Otherwise when you go to the High band
you loose all the above channels and instead

On High H you get
Challenge
Challenge +1
Forces TV
QVC
QVC Beauty
QVC Extra
QVC Style
Kiss
The Box


On High V you get
VIVA
Drama
Yesterday
Really
Pick
Pick +1
Sky News
COMMUNITY

Thurston?

Irishgoatman wrote: »

Just had a look at the links posted by Capt'n Midnight and understood virtually nothing!

It's the system that was mentioned earlier in the thread by another poster, & dismissed, as at least 1 of your receivers wouldn't be compatible, let alone anything else.

Good to see the splitter setup is doing what it should.