Originally Posted by freqdomain
I was always a little confused about multiple auto channel presets on the 2160 -- whether it adds channels or replaces channels you already have at the other rotor angles. Does it have to find a channel with Auto Channel Preset before you can manually tune it by punching in the channel number?
To be able to add digital channels manually, you just have to have an intial-setup Auto Preset that scans all 135 digital channels successfullly, even if it only gives you one channel.
Channels do not have to be in CH+/- button memory to be "there"... you can tune them with the number buttons and timer record them, and you can ADD them to button memory anytime using the Manual menu.
So, after one successful all-channel scan, you can do multiple auto-scans in any antenna position, which will simply leave older-position channels out of CH+/- memory, but then you can ADD those channels using the Manual Channel Preset menu... you just have to write the main channel numbers down for entry in that menu.
Another auto-scan would only be needed if on cable and they added new main channels or OTA cuz you won't know there might be new channels you can pick up (unless you go to the AVS local channel section
and learn about new channels that way).
In fact, in your case, since you've completed an auto-scan successfully, you can now just add channels manually, as long as you know which channels should be tunable in each direction... no more auto-scans needed if you know what should be there already.
It's beginning to sound like your signal may be too weak, but the "hang" test will eliminate the opposite. I'm on cable and I had to add an indoor amp to just one RG59 feeder line for one bedroom, where that 3575 refused to pick up a single digital channel group of 3 channels. Installed the amp and no problem since.