(meteorobs) Possible final year of tv transmitter scatter in US

[stange34 at sbcglobal.net]

Agreed Thomas. Pilot signal could also be a weak very narrow band signal, 
used by the BC Engineers to control station frequency.

Digital may also prove to be a blessing in disquise however. It allows 
distinguishing meteor TV reflections from short spurious, extraneous, or 
skip distance propogation transmissions in that band which might be 
interpreted as a meteor. Wish I had time to play with this more....

YCS


----- Original Message ----- 
From: "Thomas Ashcraft" <ashcraft at heliotown.com>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2008/01/02 21:06
Subject: Re: (meteorobs) Possible final year of tv transmitter scatter in US


> Hi Larry,
>
> I have heard that forward scatter may be possible in the future using
> the "pilot signal" for the tv video carrier wave.  I have tried to
> receive this pilot signal but have been unsuccessful in my early
> attempts. I am not sure how powerful this signal is.  Hopefully radio
> meteor observers will find solutions to this problem in the coming
> months so that radio observations will be possible into the far future.
>
> Thomas A
>
> stange34 at sbcglobal.net wrote:
>> Off the top of my head without thinking it out....
>>
>> It might be possible to use a "pre-selector" for the old analog
>> frequency which has gone digital.
>>
>> That preselector would be designed for the specific frequency
>> previously used but is capable of signal pulse integration with a
>> fairly long time constant. The purpose of the integration is to sum
>> the pulse transimissions into a reasonably flat carrier frequency for
>> the existing receivers being used.....(just a quick thought). I am
>> sure there is a way to counteract the move to digital...... I do not
>> have time to work in RF with my existing responsibilities.
>>
>> -Larry (KR6FG retired QRT)
>> YCSentinel
>>
>> ----- Original Message ----- From: "Thomas Ashcraft"
>> <ashcraft at heliotown.com>
>> To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
>> Sent: 2008/01/02 07:43
>> Subject: (meteorobs) Possible final year of tv transmitter scatter in US
>>
>>
>>
>
>
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