[GreenKeys] 'Russian woodpecker signal-revisited...

[Ken Gartland]

Hi all...

I have played the audio clip of the 'Russian woodpecker'
over and over again...There is no doubt hearing a variety
of modulation techniques and/or a form of AFSK keying,
but using varying AF frequencies...

Has any of you guys that are 'Audio'  proficient ever run this
audio clip thru a frequency spectrum analyzer to see what
is actually embedded in there?

Just curious...Sounds like it cud be an interesting
experiment...I am quite fascinated with this bit of Radio
history. I pbly did hear it many yrs ago, but didn't. know what it was at the time.

Tks!

Ken VE3-HMQ