I am going to resurrect this thread.
This is my setup:
The antenna OTA cable goes from my attic down to the cable box on the outside of the house. That OTA cable is the input of a splitter, to the individual "room" cables.
The "satellite" cable obviously goes directly to my room.
Therefore I have two cables going into my room.
1. A satellite cable.
2. A "room" cable (originating for the cable box at the side of my house).
My goals are:
1. Get OTA to my 722.
2. Use the TV2 of my 722 and distribute that signal back to the another room of my home.
Case 1: "Room" cable carries only 722 output.
If I connect the "room" cable to the TV2 out of the 722 and in the cable box on the side of my house put that room cable as the input of the splitter, I get signal to my other TVs fine enough. The video quality is good with a little bit of snow.
However, I do not get OTA to my 722.
Case 2: "Room" cable carries both the OTA signal and the 722 output.
Using a simple splitter in my bedroom, I connect the room cable to the antenna in and the TV2 out on the 722.
In the cable box on the side of my home I have a splitter. On the "in" I have the room cable. On an "out" I have my OTA cable from my antenna. On the other "out" I have a cable going to another room.
This setup allows the 722 to get the OTA signal and also the other room to get the signal from 722.
With this setup the picture quality is poor. Very snowy. Watchable still, but snowy. The intent is for the kids, so they do not seem to mind, however, if I eventually want to add more rooms, I do not see the quality getting better.
I imagine it has to do with the OTA signal coming one way and the 722 signal going the other way on the same cable.
Am I making sense so far?
Case 3: Use the satellite signal to carry the OTA signal.
I have not tried this yet.
Before I went through the effort however I thought I would ask and get feedback.
I could go through the work of having the OTA antenna cable in my attic go to my dish. From there I could use a diplexer and carry the OTA signal over the satellite cable.
Once in my room, I could use another diplexer to split the signal up to the satellite input and the OTA input to my 722.
I could then use my "room" cable and connect that to the TV2 out on the 722. This way the "room" cable only carries the output from the 722. I would then connect that "room" cable as the "in" to the splitter in the cable box at the side of my home.
What has people's experiences been with using the satellite cable to also carry the OTA signal?
listen, people get so wrapped up about the terms IN vs OUT on simple splitters. There really is no such thing. an IN is the same as an OUT and vs versa. whenever you connect any cables to a simple splitter, it is the same as cutting off the ends of all the cables, and twisting together all of the center conductors, and then twisting togther all of the braids.
modulated TV Band RF waves have no specific direction per se. They just propagate from thier source. Like the signals coming from your antenna, and the signal coming from TV2 output of the 722. The antenna puts those waves on the wire, and the 722 TV2 puts those waves on the wire. those waves are available to any device connected anywhere in the system to those wires. As long as no input source is propagating TV band waves on the same freq, it can usssually work to just insert them all on the same wire (even from diffrent sources/locations/devices). There needs to be some separation between the waves however (i like to use 3 channel separation) so that waves have little chance of interfering.
get it?
k lesson over.
i take it that your dish isnt grounded to a ground block.
so if i were you i would:
cut the cable running to your 722 from the dish, put on new connectors, insert a diplexor there, connect the Dish cable to the SAT side connect the cable to the receiver to the IN/OUT side.
disconnect your antenna cable from the splitter at the cable box and connect it to the UHF side of that diplexor.
at the 722 - use another diplexor in reserve and split it all back out EXCEPT.....
run the UHF side of that diplexor into a 2 way splitter.
connect the TV2 Ch 21-69 OUT to that splitter, and then connect your ROOM cable to that splitter, sending ALLl modulated signals down to your cable box.
then consider installing an AMPLIFIED splitter either in the cable box (it would need 110V power) and connect all other ROOM cables to it or put a TV Band amp after the 3way splitter at the 722 boosting the signal down to the simple splitter in your cable box. connect all ROOM cables to that
this way you get antenna and TV2 at all other rooms.
you would have to be careful of the channel selections for TV2 from the 722, so that they dont stomp on the antenna channels.
you didnt mention if your OTA has any kind of amplifiers in its setup.
that would be the quickest way to make it all work.
personally, when that dish was put in, I would have run the Dish cables to your cable box, and diplexed up to the 722, provided the existing cabling were up to it. this makes for simple grounding, home distribution, and connection changes. all future cables of anykind would be "home run" to that cable box.
good luck