I solved my 771 HR20 OTA Issues, This May Help You

First,

Let me tell you my symptoms. I am Jacksonville, FL and I have wineguard powered antenna that works beautifully plugged directly into my Samsung Plasma TV. After I got the HR20 and the OTA software 10b, I plugged my OTA feed into the HR20. Only one local channel and an occassional frame would show on one of the others. All of the guide data showed for my locals.

I have scoured this board for three weeks, look at every scenario. I ruled out the PSIP mapping issues by finding another person in my exact DMA that had an OTA antenna and an HR20 and was having no problems. I thought in the back of my mind that maybe a software update was needed but every blue moon I would see one still frame from a missing channel and then "771". Frustrating to no end. I started to think this was cabling or something else.

I called a local professional sat installation company (a place that usually does commercial jobs) and asked them to come out and take a look.

The first problem they identified, I was already aware of but didnt cause a problem via my Samsung TV, one of my two sat feeds was diplexed (if you dont know what this is, search the forums) with my OTA feed. This causes problems with the newer receivers and if it doesnt cause problems now, it will once the locals in your area go mpeg-4. The frequencies overlap. So you need a direct run from your OTA to your receiver. BUT THIS DIDNT FIX MY PROBLEM IN ITSELF.

Like most normal people, i dont have a signal meter to test my OTA signal strength, i used the TV tuner (before I had the HR20) to aim the OTA antenna. My sat guy got on the roof with a meter and made several pitch and directional adjustments (pretty slight) and i'll be damned if every local channel comes in on both tuners almost 100 percent. If you went from the TV to the HR20 tuner and you are getting 771's, i would a) make sure you arent diplexing the signal b) re-adjust your OTA antenna, adjusting it to the sat receiver signal meter rather than the TV tuner.

While I dont think this is going to solve everyone's problem, I am sure there are a lot of others like myself in this situation. The tuners in the HR20 need much precise directional adjustment than the TV tuners do. It made all the difference in the world.

For those of you with missing guide data or mismatched PSIP, this wont help. But there are a hell of a lot of post with 771's that say "fine through Samsung TV tuner", etc that this will help.

Please feel free to PM me if you need any clarification, I am happy to help and answer any questions. This has been going on for almost 4 weeks and I am happy to put it to bed.