Originally Posted by walterappleby
Let me make sure I have this correct... you have the following setup:
Switcher out via HDMI --> HDMI to Composite converter --> RCA to Coax adapter --> Coax splitter --> Multiple TV's
Assuming that is right... you need to be using another Coax to RCA adapter and the Composite inputs on the TV's. The Coax input on the TV if for an RF signal... and you aren't sending RF. You are sending composite video which is different a different signal.
BUT... I have to ask... why are you converting HDMI to Composite in the first place? What is the resolution coming out of the switcher? If it's HD then you would be much better off distributing your signal as HD rather than converting it to SD/Composite.
Why don't you back up a bit and tell us a little more about your setup and what exactly you want to do. I think that might help get you to a satisfactory solution faster than trying to figure out and fix the setup you have now.
That's pretty much accurate, though I missed a couple steps. We're taking the 1080i signal out from a Panasonic AG-HMX100 video switcher through DVI-D. We adapt that to an HDMI signal and go to an HDMI splitter. From that splitter we are sending a boosted HDMI signal to two projectors in our sanctuary, and also go to a composite converter. Then we use an RCA to coax adapter to go to a standard coax splitter, from which we go to TVs in our lobby, cafe, and nursery. All three should be fine as far as run length.
What baffles me is that two of the TVs work just using the coax in. Maybe those TVs have built-in RF converters? I have tried adapting back to RCA on the problem TV but it still doesn't work. On the appropriate inputs and channels, the screen flickers when I plug into the RCA, and the static pattern changes when I plug in the coax, but there is no discernible picture. I plugged a DVD player into the RCA plug and it worked fine, so it's not the TV that's the problem.
We tried this because it was a lot cheaper and easier to get the HDMI to composite converter than get new TVs and run new cabling to go all digital.
Our options coming out of the switcher are DVI-D and SDI. I might be able to convince the higher-ups to give me the budget to go all digital, especially if it would mean better audio, but it would be preferable to figure out a relatively cheap way to get the rogue TV working.