On Tuesday, August 25, 2020 at 11:32:47 PM UTC-7, micky wrote:
In alt.home.repair, on Tue, 25 Aug 2020 11:20:58 -0500, Mark Lloyd
wrote:

On 8/25/20 9:15 AM, micky wrote:

[snip]

OTOH we had to rescan about a month ago and that was the first time in
more than 2 years. More than 5 years?

We had to rescan earlier this year, just because of a new subchannel
(56-4, AntennaTV) that the local NBC station added.

So does that mean if you hadn't rescanned, you'd still have gotten all
the channels but that one.

Could you have just punched in 56,4 and the tv would find it, and then
ou could add it to the internal list, but they said to rescan because
that's a simple instruction and applies to everyone, whereas the
instructions for adding a station vary by tv.

[snip]

After the FCC repack in LA several channels moved frequencies so that needed a rescan. KCAL channel 9 has added
3 subchannels but not at the same time so you would need a rescan for each addition. We had an old Magnavox
where you could select the RF channel and a few seconds later it would identify the PSIP and report the
channel. It gets more interesting in that the channel 28 carrier for KCET also has KLCS (ch 58) as subchannels
but behaves as if ch 58 is its own carrier. Likewise channel 50 KOCE is now
subchannels on KSCI ch 18. It did
take them quite a while before they got is sorted so that my TVs and computers would recognize it properly.

G²