🚀 go-pugleaf

In article <5b06539d-cfaf-427d-92fd-2d7fccd7119e@kk9g2000pbc.googlegroups.com>,
spamtrap1888  <spamtrap1888@gmail.com> wrote:
>Wondering if my old ATSC tuner still worked, I plugged it in and
>connected it to an HDMI input on our newish TV. To my surprise
>clicking through the channels, I found that 7.1 was followed by 7.1,
>7.2 followed by 7.2, etc. But there was no signal on the second set of
>subchannels.
>
>It finally dawned on me that the cause might be two digital channels
>mapping into the same virtual channel.

Depending on where you live, you may be getting both KGO transmitters,
but one isn't strong enough to give you a signal. When KGO brought up
their San Jose transmitter, I rescanned to get that one and then had
to block out the other 7.1 and 7.2 from my converter box.


Patty

In article <5b06539d-cfaf-427d-92fd-2d7fccd7119e@kk9g2000pbc.googlegroups.com> spamtrap1888 <spamtrap1888@gmail.com> writes:
>Wondering if my old ATSC tuner still worked, I plugged it in and
>connected it to an HDMI input on our newish TV. To my surprise
>clicking through the channels, I found that 7.1 was followed by 7.1,
>7.2 followed by 7.2, etc. But there was no signal on the second set of
>subchannels.
>
>It finally dawned on me that the cause might be two digital channels
>mapping into the same virtual channel.

  A while back they added a second transmitter transmitting on 35,
apparently using an identical bit stream as the main transmitter.
Channel 2 does a similar thing.

  In the bay area we have:

	KTVU-DT	2.x	44
	KTVU-LD	2.x	48
	KGO-DT	7.x	7
	KGO-LD	7.x	35

  I think this violates the promise that the virtual channels would be
protected in a given area from others using the same channel numbers.
When KAXT came on in the south bay, they were on RF channel 42, and
42.1,2,3,4,5,6...  Unfortunately, KTNC-DT was already on RF channel 14,
operating as 42.1 etc.  This produced a conflict even though they were
transmitting on different channels.  Many were unable to sort it out.
Eventually, KAXT moved to 1.1,2,3,4,5,6...

  The only reason that KGO-LD doesn't present a similar problem with
KGO-DT is that they have the same programming.  For viewers who are
in the area where KGO-DT is strong, and KGO-LD is weak and unstable,
some will find their tuners using the last one found in a sequential
channel scan, so for them 7.1 is received from channel 35, even if
channel 7 is much more usable.

  The proper thing would be for the second channels to use different
PSIP channel IDs, and to ID appropriately.

  My set also shows 7.1 7.1 7.2 7.2, but doesn't see 2.1 2.1 2.2 2.2.
Perhaps channel 48 was not on last time I scanned.  Unfortunately, on
a Samsung you cannot override or adjust the mapping --- you can only
re-do the full scan.


  I'm curious what sort of ATSC tuner you have.  Mine is an Accedian,
but the built-in ones in the TVs and DVR are what get used.

	Alan