Re: How will the US local area stations commerate the end of System-M?

In alt.video.digital-tv Gordon Burditt <gordonb.7vies@[EMAIL PROTECTED]
> wrote:

| If the analog and digital channels are physically adjacent (in
| frequency), then you're probably seeing adjacent-channel interference.
| The digital station probably isn't at full power yet, but the analog
| one is, which just makes things worse for the digital station.
| 
| If the two stations on adjacent frequencies are owned by the same
| station, it probably doesn't want to make its analog transmissions
| WORSE yet by using full power for digital.

This would only be the case on especially cheap or antique TVs.  Most TVs
work just fine with adjacent channels at the same strength.  Otherwise
people would have had way too much trouble with cable TV over the past
many years and even decades.  TVs I had in the 1970's worked fine with
the whole VHF band filled up.  The later when I put up antennas to get
some UHF stations, two of them were 33 and 34.  33 was rather strong
being only 20 miles away, and 34 was rather weak being 90 miles away.
But 34 still worked.  I also had 15 and 16, but both were a bit weak.
And this was on a couple hybrid TVs from the late 1969's, one from
RCA and one from Zenith.


| I think the same problem occurs with analog vs. analog adjacent
| channels, keeping in mind that there are frequency gaps between
| bands, so the FCC avoids allocating adjacent channels too close
| together, even before any of this digital stuff came up.

The issues might exist when both stations are overloading the tuner, or
when
one is substantially stronger than the other.  But I have generally had no
problem with adjacent channels in analog transmission.  I expect even
fewer
problems of this type with digital.

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