Originally Posted by count_on_mike
I am amazed/confused about how my HDTV, DTV converter box (for an older TV) and TIVO HD know when the digital channels change frequency. Amazingly, my HDTV (Samsung) and DTV converter box (RCA) have had no problems following any digital channel switching. I haven't had to redo a channel scan. KOFY (20) and KICU (36) still come in fine.
However, my TIVO has problems.
Did KICU (36) wait until Thursday night/Friday to switch from 36 to 52?
How did my HDTV and RCA DTV converter box follow without a rescan?
Did KOFY (20) ever switch digital frequencies on 2/17?
I know this isn't a TiVo forum, but the forum should be able to answer the above three questions
(And I get great reception on digital KTVU)
KICU digital has never been on channel 36. Their analog signal is still there. While both KOFY and KICU have ended programming on their analog channels both are still on the air showing what they call "Nightlite Service" there. Neither have done anything to their digital channels. KOFY is still on channel 19 with two sub-channels aliased to 20-1 and 20-4, and KICU is still on 52 with two sub-channels aliased to 36-1 and 36-2. KOFY will not be changing, but KICU will be moving their digital operation to channel 36. That change will probably occur on June 12th when the other channels move to their new channels, but they could get Special Temporary Authority from the FCC to do it earlier once their analog signal goes off the air.
Some tuners seem to be able to pick up PSIP information automatically and save it, while others require a scan to get the information. When stations add or delete sub-channels, I have receivers that make the changes automatically, while others retain the old information and don't update until I re-scan.
For example, when KQED dropped their -4 and -5 sub-channels, some of my receivers dropped them from the list, some retained them and I had to rescan to get rid of them. When KGO did it's digital test on channel 7, some receivers picked up the new channel automatically, while others needed a rescan to get it. I had to rescan again to get these later ones to recognize KGO again back on channel 24. One of my receivers kept the old 7-1, 7-2 and 7-3 for channel 24 and added a second 7-1, 7-2 and 7-3 for channel 7. When KCNS added their new -2 sub-channel, some of my receivers added it automatically, others needed a re-scan. Receivers don't all work the same way.
I think Tivo receivers get their information from Tivo, not from over the air like others, so they could get anything depending on what the folks at Tivo send out.