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52 posts

Master Geek


Topic # 152176 18-Sep-2014 13:51
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Hi All,

I recently bought a dvb-s usb tuner for my HTPC set-up. I currently also have mySky HDI, so i need to split the feed from the satelite to the two devices. Do I just use an unpowered splitter or do i need a diplexer?

Also, would 75ohm cable suffice?

Thanks
Jules

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2647 posts

Uber Geek
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  Reply # 1131437 18-Sep-2014 14:05
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At least 1 leg needs to have power pass-through for sat to be able to power the LNB (and allow polarity and 22k switching)

It also means similar to a single tuner, depending on what transponder is being watched other channels/polarity may not be available.

The alternate if you have the dual throad LNB with 4 outlets on it, is use the secondary and run another cable to the standard decoder

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Ultimate Geek
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  Reply # 1131447 18-Sep-2014 14:15
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You would only use a diplexer if you had one cable to your sat dish and wanted to have a terrestrial antenna use the same cable to save running an extra cable just for the terrestrial feed.
May be this article might explain it better. http://en.wikipedia.org/wiki/Diplexer
 

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Wannabe Geek
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  Reply # 1143221 29-Sep-2014 01:43
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To slit signal as you are doing, then a splitter , either single or double power pass.

Diplexers are used to combine signals, ie sat/ter uhf/vhf

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