George,
The digital modes qualify since the output medium is audible radio waves - not
light - which is being received/transmitted. Same goes for television since
the medium is inherently audible as well. Granted, the final communication is
visual since I've never purposely tried to decipher these modes by ear alone :)
My original thinking was the case for flashing signals with a polished mirror.
While not defined as radio, it is a valid form of communication - as are the
smoke signals I mentioned previously. A visible laser like emission shone
across two mountain peaks at a blackboard can only be deciphered visually since
there is no human audible component.
The audio provision seems to me a reasonable theorem, yet it's solely my own
and unscientific. I am not trained in this subject, so my approach is from a
layperson's perspective.
Thanks for helping me exercise the gray matter :)
________________________________
From: George Sintchak/WA2VNV <wa2vnv@optonline.net>
To: Joseph Nieves <n2tee73@yahoo.com>; vhfcontesting@contesting.com
Sent: Mon, December 7, 2009 6:26:09 PM
Subject: Re: [VHFcontesting] The meaning of coherence [was: [WSVHF] [VHF]
VUACSeeks Input]
Joe,
You say "audible transmissions" - so no RTTY, WSJT or PSK31 would be
allowed.... Is that what you mean?
You also say "the human communication factor is always audible" so I guess
you don't watch any TV or read (this) email on you computer monitor coming
into your home over the fiber-optic cable - is that TV only "audible
communication" ?
----- Original Message -----
From: "Joseph Nieves" <n2tee73@yahoo.com>
To: <vhfcontesting@contesting.com>
Sent: Sunday, December 06, 2009 3:24 PM
Subject: [VHFcontesting] The meaning of coherence [was: [WSVHF] [VHF]
VUACSeeks Input]
All:
Fiber-optics terminate at my home for Internet and phone service. While the
transmission medium is light based when I pick up the phone receiver, the
human communication factor is always audible. To eliminate smoke signals
and garage door openers, how about just limiting QSOs to something like:
"Electronic devices capable of emitting and receiving audible
transmissions..."
Still gets a bit sticky since my description above would technically make
legal electronic drum sets :)
In all seriousness, come up with a consensus on the spectrum's real world
"high bar" for audible radio waves as opposed to light waves medium. When
an enterprising ham breaks the "high bar" barrier, you move the contest goal
post as well.
Regards,
Joe Nieves, N2TEE
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