[Laser] My first outdoor test, 200m

[Paolo Cravero]

Hello.
Finally last night electrical and optical parts of my light TX-RX system could 
meet. The test was MCW over a bit more that 200m LOS path in urban 
environment. Nothing special, but we could prove that "the thing" works.

I've published a couple of pictures and screenshots here
http://ik1zyw.blogspot.com/search/label/optical (top post for the time being).

Now we are looking for a longer distance path.

Given last night results, I can probably add as much as 50dB of loss until the 
signal becomes unusable. Am I right assuming that in normal clear air, red 
light has about 1dB/km of attenuation?

73 de
Paolo IK1ZYW