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LNB1 out on a Freesat+


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Old 01-05-2011, 18:18
Almendros
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I have a Humax Freesat+ connected to a quad LNB.

I am considering buying an Openbox HD receiver to "play" with.

At the moment I have a structural problem which makes it difficult to run a third cable into the house - this will get resolved soon.

In the meantime I considered taking the existing second cable from the Humax to the Openbox and putting up with the minor limitations of having one feed to the Humax.

As an alternative, if I take a link cable from the Humax LNB1 output to the Openbox what problems will I have. I know that only one box can control the polarity of the LNB what what would happen in practice?

Any other ideas?
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Old 01-05-2011, 18:31
Jepson
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In the meantime I considered taking the existing second cable from the Humax to the Openbox and putting up with the minor limitations of having one feed to the Humax.

As an alternative, if I take a link cable from the Humax LNB1 output to the Openbox what problems will I have. I know that only one box can control the polarity of the LNB what what would happen in practice?
It would limit you to using whatever band and polarity the Humax has selected on the first LNB.

Not too much of a problem if you just want to play with the box and get used to its UI and quirks but a bit more of a restriction if you actually want to use it.

What it means is that your new box would be able to get exactly the same channels as the Humax would if running on a single LNB with loop over cable.
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Old 01-05-2011, 19:38
grahamlthompson
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It would limit you to using whatever band and polarity the Humax has selected on the first LNB.

Not too much of a problem if you just want to play with the box and get used to its UI and quirks but a bit more of a restriction if you actually want to use it.

What it means is that your new box would be able to get exactly the same channels as the Humax would if running on a single LNB with loop over cable.
Correct if the humax is on, otherwise the looped box should get everything if power saving in sby is off (according to the manual). An alternative is connect the second lnb connection to the new box, fit the loop from tuner 1 out to tuner 2 in and reset the hdr to let it work in single cable mode.

http://myhumax.org/forum/topic/what-...-1-or-2-cables
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Old 02-05-2011, 00:48
machare
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I use a switch in the supply to Tuner 2, this lets me direct the signal to my PC instead.
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Old 04-05-2011, 07:53
Almendros
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Correct if the humax is on, otherwise the looped box should get everything if power saving in sby is off (according to the manual). An alternative is connect the second lnb connection to the new box, fit the loop from tuner 1 out to tuner 2 in and reset the hdr to let it work in single cable mode.

http://myhumax.org/forum/topic/what-...-1-or-2-cables
Thanks for that Graham. That sounds like to most logical approach on a temporary basis.

I did use one feed with loop through when I first got the Humax and was surprised just how well it coped.
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Old 10-05-2011, 06:34
eric
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Correct if the humax is on, otherwise the looped box should get everything if power saving in sby is off (according to the manual). An alternative is connect the second lnb connection to the new box, fit the loop from tuner 1 out to tuner 2 in and reset the hdr to let it work in single cable mode.

http://myhumax.org/forum/topic/what-...-1-or-2-cables
I have have just bought an HDR and have tried looping the LNB1 output to LNB1 on my sky+. I find the sky+ will only receive if I switch the HDR off with the rear mains switch.

Is there something I'm missing?

Is it possible to damage either box or the LNB by connecting this way?
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Old 10-05-2011, 09:50
grahamlthompson
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I have have just bought an HDR and have tried looping the LNB1 output to LNB1 on my sky+. I find the sky+ will only receive if I switch the HDR off with the rear mains switch.

Is there something I'm missing?

Is it possible to damage either box or the LNB by connecting this way?
Did you try turning off power saving in sby on the hdr ?. The box is designed to allow looping off a second tuner from the the lnb1 in (hence it's ability to use two tuners from a single lnb), so you won't do any damage just have a limited selection of channels on the sky box while the hdr is powered on or recording.
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Old 10-05-2011, 10:55
eric
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I turned off the power saving and also the HDR with the remote. This resulted in no signal being received on the sky+ until I powered off with the mains switch.
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Old 10-05-2011, 11:10
grahamlthompson
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I turned off the power saving and also the HDR with the remote. This resulted in no signal being received on the sky+ until I powered off with the mains switch.
Odd, can you watch some channels with the hdr on ?.

For instance if you tune the hdr to one of these any of the others should be viewable on the Sky box.

Code:
104 Channel 4	10714	H	2D
125 More4 +1	10714	H	2D
300 Film4	10714	H	2D
301 Film4 +1	10714	H	2D
974 Channel 4	10714	H	2D
750 RTE Radio 1 	10743	H	2D
751 RTE Radio 2fm 	10743	H	2D
752 RTE Radio Lyric FM 	10743	H	2D
753 RTE Raidio na Gaeltacta 	10743	H	2D
102 BBC Two	10773	H	2D
105 Channel 5	10773	H	2D
106 BBC Three	10773	H	2D
600 CBBC	10773	H	2D
950 BBC 1 London	10773	H	2D
951 BBC 1 CI	10773	H	2D
954 BBC 1 East (W)	10773	H	2D
965 BBC 1 West	10773	H	2D
968 BBC 2 England	10773	H	2D
102 BBC 2	10802	H	2D
107 BBC Four	10802	H	2D
601 CBeebies	10802	H	2D
705 BBC Radio 5 Live 	10802	H	2D
706 BBC Radio 5 Live Sports Extra 	10802	H	2D
959 BBC 1 S East	10802	H	2D
955 BBC 1 N West	10802	H	2D
960 BBC 1 Scotland	10802	H	2D
970 BBC 2 SCOTLAND	10802	H	2D
103 ITV 1 Border England	10832	H	2D
103 ITV 1 Central East	10832	H	2D
103 ITV 1 Thames Valley	10832	H	2D
103 ITV 1 Wales	10832	H	2D
103 ITV 1 West	10832	H	2D
103 ITV 1 West Country South	10832	H	2D
118 ITV4 + 1	10832	H	2D
119 ITV 1 HD (Crystal Palace)	10832	H	2D
114 ITV2 +1	10891	H	2D
103 ITV 1 Anglia South	10891	H	2D
103 ITV 1 Border Scotland	10891	H	2D
103 ITV 1 Meridian South	10891	H	2D
103 ITV 1 Tyne Tees North	10891	H	2D
103 ITV 1 Yorkshire West	10891	H	2D
137 CBS Action	11222	H	EB1
139 horror CH+1	11222	H	EB1
733 Heart radio	11222	H	EB1
786 BFBS Radio 	11222	H	EB1
807 Jewelery Maker	11222	H	EB1
141 BET + 1	11222	H	EB1
210 CNBC 	11261	H	EB1
136 CBS Reality +1	11261	H	EB1
809 JML	11307	H	EB1
810 Ideal Extra	11307	H	EB1
812 Ideal World	11307	H	EB1
813 Create A Craft	11307	H	EB1
400 Wedding TV	11344	H	EB1
405 Food Network	11344	H	EB1
406 Food Network + 1	11344	H	EB1
140 BET (Black Entertainment TV)	11344	H	EB1
103 ITV 1 HD (red button)	11427	H	EB1
900 On Demand	11427	H	EB1
901 BBCi Player (View Only)	11427	H	EB1
903 ITV Player (View Only)	11427	H	EB1
986 Teletext (Watch Only)	11427	H	EB1
999 Freesat Info	11427	H	EB1
509 Zing TV	11546	H	EB1
206 Russia Today	11623	H	EB1
402 INFORMATION TV	11623	H	EB1
514 Clubland TV	11222	H	EB1
205 France 24	11661	H	EB1
690 Inspiration TV	11661	H	EB1
694 God Channel	11661	H	EB1
851 Netplay TV	11661	H	EB1
Can you also try using the second feed to supply the sky box instead of tuner 2 on the hdr. Does turning on the Sky box affect the displayed picture on the hdr ?
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Old 10-05-2011, 14:42
eric
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Still nothing until I turned ON the power saving and the HDR off with the remote, now I get most channels on the sky+.

The ones I don't get are the ones that are weaker in my area, I'm not in UK. The Humax appears to attenuate the signal from LNB1 in to LNB1 out, is this true?

If I connect feed 2 to the sky+ then both boxes are fine.

Is it ok to leave the LNB1 out connected to the Sky+ I'm a bit concerned that damage may occur if the LNB gets 2 different commands in respect of voltage.

Thank you for your replies Graham.
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Old 10-05-2011, 15:51
grahamlthompson
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Still nothing until I turned ON the power saving and the HDR off with the remote, now I get most channels on the sky+.

The ones I don't get are the ones that are weaker in my area, I'm not in UK. The Humax appears to attenuate the signal from LNB1 in to LNB1 out, is this true?

If I connect feed 2 to the sky+ then both boxes are fine.

Is it ok to leave the LNB1 out connected to the Sky+ I'm a bit concerned that damage may occur if the LNB gets 2 different commands in respect of voltage.

Thank you for your replies Graham.
Other than feeding tuner2 from tuner1 out I have not used the loop but yes I have read that output is lower than the input which may make a difference in your situation.

Sat tuners with a lnb out should be designed to ignore control signals input at the loop out while the internal tuner is powering the lnb. If your Sky+ box has a card that allows recording you will get a more flexible arrangement by using the hdr in single cable mode, connect the loop out to tuner 2 in and give the Sky+ box it's own feed (reset to switch modes). You can use Dave Murgatroyds dodge to allow scheduled recordings on a Sky+ box with only 1 cable.

The hdr on one cable will allow recording of any two in the same frequency band and polarity as tuner 1 is using and third channel viewing of any channel sharing a transponder with either recording. If both are from the same transponder you can view (and time shift) any third channel in the same frequency band/polarity.

http://myhumax.org/forum/topic/what-...-1-or-2-cables
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