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HDTV Technical

khunron13's Avatar khunron13
09:53 AM Liked: 10
post #1 of 9
09-28-2013 | Posts: 3
Joined: Sep 2013

I hope this is not a rehash of any other post, but I've search the forum and could not find an answer to my situation.

 

I'm using an HDTV as a secondary output for my Dish service. The signal is run via in-wall coaxial cable from the primary Dish receiver and connected directly into my HDTV; no secondary receiver. I want to install an OTA antenna, preferably the Mohu Leaf Paper-Thin Indoor HDTV Antenna. The problem is that my HDTV has only one coaxial antenna input, so I need to use HDMI for this second antenna input.

 

I would rather not buy an ATSC tuner if possible, so is there another cheaper solution to allow the use of a coaxial cable with the HDMI input?


ctdish's Avatar ctdish
10:22 AM Liked: 23
post #2 of 9
09-28-2013 | Posts: 1,387
Joined: Dec 2000
Your Dish receiver probably has an antenna input and ATSC tuner in it. What model receiver do you have? If you want to watch a different channel on the secondary Tv and it is now always tuned to channel 3 or 4 you could mix the antenna signal with the Dish signal with a channel insertion filter or possibly a hi lo VHF signal splitter/combiner.
John
SAM64's Avatar SAM64
10:38 AM Liked: 74
post #3 of 9
09-28-2013 | Posts: 1,592
Joined: Apr 2011
Quote:
I need to use HDMI for this second antenna input.

You can't, HDMI is not an RF input. You'll need a tuner.
khunron13's Avatar khunron13
10:54 AM Liked: 10
post #4 of 9
09-28-2013 | Posts: 3
Joined: Sep 2013

@John, I've got the VIP222K receiver. I appreciate your answer, but your proposed solution is a bit too "advanced" for what I'm really trying to do. All I'm trying to do is connect 2 antenna sources with coaxial cables into an HDTV that only has one coaxial and one HDMI inputs. 

 

I've read other threads that say the signal from a antenna with a coaxial cable has to be "converted" before it can be used in an HDMI input on the HDTV. Just trying to find the easiest and cheapest way to do that. Thanks!


ctdish's Avatar ctdish
11:14 AM Liked: 23
post #5 of 9
09-28-2013 | Posts: 1,387
Joined: Dec 2000
Use this: http://www.solidsignal.com/pview.asp?p=sky26802&d=skywalker-sky26802-hi/low-vhf-band-separator/combiner-%28sky26802%29&utm_campaign=base&utm_medium=organic&utm_source=google_base
Line goes to TV
Low goes to Dish cable
Hi goes to antenna
John
pamajestic's Avatar pamajestic
01:26 PM Liked: 14
post #6 of 9
09-28-2013 | Posts: 113
Joined: Feb 2008

This will filter out all of the UHF antenna channels. Just use a regular splitter in “reverse”. One cable from the 222K connected to the one output, the cable from the antenna to the other output. Then a short cable from your TV to the input on the splitter and scan for channels. Splitter can gotten at almost any store, Lowes, Home Depot, Wal-Mart etc.
ctdish's Avatar ctdish
02:14 PM Liked: 23
post #7 of 9
09-28-2013 | Posts: 1,387
Joined: Dec 2000
All of the Hi low VHF splitters I have tried pass UHF on the Hi side. The all channel regular splitter will weaken both signals, add noise and even possibly transmit the dish signal around the neighborhood.
John
ProjectSHO89's Avatar ProjectSHO89
03:08 PM Liked: 77
post #8 of 9
09-28-2013 | Posts: 2,755
Joined: Feb 2009
Quote:
The problem is that my HDTV has only one coaxial antenna input,

That is normal.
Quote:
so I need to use HDMI for this second antenna input.

No, you don't.


The antenna gets priority for the antenna jack if the TV is to use the antenna. If your SD output from the VIP222 is on analog channel 3 or 4, then use the HLSJ as recommended by ctdish unless the exception below applies. Do NOT use a reversed splitter!!! The HLSJ will NOT strip UHF through the HI port plus, as ctdish noted, you may turn your system into an unintentional radiator.

Exception: Selection of an antenna is best done based upon what the technical and signal requirements might be, not how much hype and bull$hit a marketing company like Mohu can pump out. If you have local stations that operate on real channe2-6 that you want to receive with the antenna, than the HLSJ will not work. Since there's only about 35-40 full power low-VHF stations in the whole country, it's not terrible common. There are ways to work around this issue, if necessary.

However, if you can post a link to your exact address TVFool plot, we'll be able to make an informed recommendation to you so you can understand your options in selecting a technically appropriate antenna. http://www.tvfool.com/?option=com_wrapper&Itemid=29 Make sure that Google's Maps can accurately resolve your address first.
khunron13's Avatar khunron13
04:40 PM Liked: 10
post #9 of 9
10-04-2013 | Posts: 3
Joined: Sep 2013

Thanks for all the input. I ended up buying the OTA module for my Dish tuner. It does everything I wanted. I did try an HLSJ, but the signal was deteriorated quite a bit; lost 1/3 of the channels as I received using the signal straight from the antenna. Thanks again.


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