[Laser] RTTY over light, anyone tried it?

[James Whitfield]

Why an IR beacon?  If you used visible light would the modulation cause any 
noticeable change in light output to the naked eye?

And if it did, how much trouble would it be to use FSK instead of OOK for 
your beacon.

For that matter, if you wanted to have a multi-use optical beacon, you could 
intentinally sent Morse Code, each Dit  and Dah tone modulated, the tones 
also phase or frequency shift modulated.   As long as you kept the Morse 
speed low enough to be easily read visually, it would be easier to identify 
the target in a telescope, once the optical system was locked on you would 
be able to match the tones to the visual, and higher speed data could be 
transmitted in a machine readable format.


James
 n5gui


----- Original Message ----- 
From: "KD7JYK DM09" <kd7jyk at earthlink.net>
To: "Free Space LASER Communications" <laser at mailman.qth.net>
Sent: Tuesday, October 21, 2008 6:55 PM
Subject: Re: [Laser] RTTY over light, anyone tried it?


>I had thought about making an IR beacon modulated with AX.25 and mounting 
>it
> on a tower...
>
> Kurt
>
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