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

"Doug Smith W9WI" <w9wi@[EMAIL PROTECTED]
> wrote in message
news:pan.2008.05.04.03.11.23.250029@[EMAIL PROTECTED]
> On Fri, 02 May 2008 21:44:57 -0700, Sal M. Onella wrote:
> > KCAL and KCBS are a duopoly, that is owned by the same company.  I had
heard
> > that on Day Zero KCBS-DT might move to Ch 9 and KCAL-DT might stay on
Ch
43.
> > KCBS-DT must vacate Ch 60 on Day Zero and going digital on Ch 2 would
seem
> > to be a bad move, given the known low-band noise problems.  We shal
see.
>
> KCAL-DT has filed to return to channel 9 on Transition Day.  Same tower
as
> their current analog facility but it looks like they're going to use a
> different antenna.  (a directional antenna 7m lower than their existing
> analog one)  The permit hasn't been issued yet but 9 is their assigned
> channel in the FCC's post-transition channel table.
>
> KCBS-DT has received a permit to take over KCAL-DT's channel 43 facility
> on Transition Day.  The power will increase about 10% but the same
antenna
> will be used.
>
> (one might guess that will confuse those viewers who don't realize they
> need to rescan: suddenly, when they punch up channel 9 on their remotes
> they're going to get channel 2!)
>

Thanks, Doug.

I saw that as another possibility and it means my life is just a skosh
more
complicated, since I need a phased pair of antennas to put a local LPTV
outlet in a deep null on Ch 43 if I want to keep KCBS-DT as reliable as it
has been on Ch 60.  KCAL-DT is only "in" about 20 percent of the time due
to
the co-channel interference.

I already made one phased antenna pair for Ch 36 so I can get KNBC-DT.
(It's the same situation -- analog LPTV co-channel.  It works perfectly.
The LPTV disappears.)

My house already looks like a pincu****on with antennas, so I guess another
mast won't collapse the roof.  (I need a tower.)

I wonder ... if I spaced the antenna pair for a frequency mid-way between
Ch
36 and Ch 43, would partial phase cancellation be satisfactory on both 36
and 43?  I doubt it but it's cheap to try.



"Sal"
(really KD6VKW)