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Chat Discussion, Cable split at DreamBox forum; Hi, I would like to take my incoming cable signal and have one DB downstairs and 2 upstairs...is there any ...

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roystonvasey
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Cable split - 25-March-2008, 21:15

Hi,
I would like to take my incoming cable signal and have one DB downstairs and 2 upstairs...is there any advice as to how i achieve this? I have read of loftboxes, splitters, amplifiers, attenuators etc etc etc and would really appreciate a bit of clarity :)
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PLAN B
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Thumbs up 25-March-2008, 23:09

The only way to split the cable is at the lnb. Each box must have its own feed from the LNB.
The channels are selected by "adding" a voltage or a "tone" to the cable, this is relayed to the LNB which selects the correct band. The whole band is then passed down the cable at a much lower frequency to the "STB", where the correct channel is taken out and displayed on the TV.
Splitting the cable through a loft box or similar will not allow the "TONE" or "VOLTAGE" to pass thereby limiting the channels available.
You may need to invest in a QUAD LNB.... make sure you don`t get a Quatro LNB as this is something completly different and will not work on your system.

Just re read your post. it seems you have a DM500-C cable box the good news is any F type 3 way splitter will do the job, only thing to remember is you`ll loose about 6 to 8db on each feed.



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26-March-2008, 00:16

Hi thanks for reply...just for confirmation. I just need a standard splitter? I was hoping to take cable upto loftbox style splitter and feed to alternate DB500 boxes in other rooms. Do i put an attenuator on each to give back the loss of db per split?
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28-March-2008, 23:08

Quote:
Originally Posted by roystonvasey View Post
Hi thanks for reply...just for confirmation. I just need a standard splitter? I was hoping to take cable upto loftbox style splitter and feed to alternate DB500 boxes in other rooms. Do i put an attenuator on each to give back the loss of db per split?
Thanks in advance
If your running cable dreambox`s then a good quality 3 way "F" type splitter will do the job. These usually carry a 5 to 8 db loss so adding an attenuator will decrease the signal not improve it.
From my days installing CATV in LONDON many years ago you will need to keep the SNR above 25db it think. Ask you local "cable guy" for a splitter and what the local readings should be. Bare in mind that in the uk there have been recent prosecutions for theft of service.


   
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