Hi Ed,
I think it would be really cool to send SSTV pictures via light, or even
regular fast-scan ATV. You're giving me a lot of ideas for experimentation
that I wouldn't have had before ...
73, Zack W9SZ
On Wed, Dec 2, 2009 at 1:40 PM, Hare, Ed W1RFI <w1rfi@arrl.org> wrote:
> A distance of 1 km using laser may be too easy, but at 301 GHz, it would
> not be trivial.
>
> I wonder if a requirement that a light signal be demodulated to sound or
> to a computer input would eliminate the night-vision-goggle effect? You
> don't want a rule that would preclude detecting a signal electronically
> and using that detected signal to operate a light, swing a meter or some
> other visually observed method. A deaf person may detected an on/off
> keyed laser and turn it to a blinking light; a blind person may detect
> it and turn it to a buzzer felt with a fingertip, etc.
>
> By the time all of these "what ifs" are addressed in the rule, however,
> it would be orders of magnitude more complex than it need be, and
> someone may still find a loophole.
>
>
> Ed Hare, W1RFI
> ARRL - The national association for Amateur Radio
> ARRL Laboratory Manager
> 225 Main St
> Newington, CT 06111
> Tel: 860-594-0318
> Internet: W1RFI@arrl.org
> Web: http://www.arrl.org/
> Member: IEEE, Standards Association, Electromagnetic Compatibility
> Society
> Secretary: IEEE, Connecticut Chapter
> Secretary: IEEE EMC Society Standards Development Committee
> Member: ASC C63 EMC Committee, Chairman: Subcommittee 5, Immunity
> Vice Chair: IEEE P1775 BPL EMC Committee
> Member: ICES SCC-28 RF Safety
> Member: Society of Automotive Engineers EMC/EMR Committee
> Board of Directors: QRP Amateur Radio Club International
>
> >-----Original Message-----
> >From: Duane - N9DG [mailto:n9dg@yahoo.com]
> >Sent: Wednesday, December 02, 2009 2:31 PM
> >To: dmcintyre@att.net
> >Cc: microwave@lists.eclectechs.com; VHF REFLECTOR;
> >wsvhf@mailman.qth.net; Vhfcontesting Remailer
> >Subject: [VHF] Re: [WSVHF] [Mw] VUAC Seeks Input
> >
> >--- On Wed, 12/2/09, Dexter McIntyre W4DEX <dmcintyre@att.net> wrote:
> >
> >> Even 1 KM with laser is to easy.
> >
> >Agree, 1 KM is not a great enough distance..
> >
> >> Why not require both non mechanical modulation plus some sort of
> >> electrical detection on receive?
> >
> >One item that was pointed out on a regional VHF discussion
> >list with regards to a simple "electrical detection"
> >requirement for RX is that it opens the door for the use of
> >night vision goggles as an RX. Do people think that 'off the
> >shelf' night vision goggles is really an RX, ... or not???
> >That approach for a RX is arguably still a flashing of
> >flashlights excercise. So I think the wording may need to be
> >carefully crafted to consider that possible angle of it as well.
> >
> >In general I get the impression from the various lists I'm
> >monitoring that most every agrees with the same end goals for
> >the 'light rules'. But what I also see is a struggle for any
> >one to come up with wording that truly captures the general
> >sentiment without 'the rule' becoming detrimental to experimenting..
> >
> >
> >Duane
> >N9DG
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