There’s a pattern in that noise!


Many thanks to SWLing Post contributor, @K7al_L3afta, who just shared the image (above) and noted, on Twitter:

“I just discovered the noise at the start of [the VOA Radiogram has] a purpose!” 

That’s a brilliant discovery!

Click here to learn about the VOA Radiogram.

Click here to follow @K7al_L3afta on Twitter.

3 thoughts on “There’s a pattern in that noise!

  1. Tom Servo

    Ha ha yeah, they often do it at the start and end of the broadcast. I think it’s pretty cool. I’ve seen hams do this as well after certain digital transmissions. Sure would like to know how they do it!

  2. Dan

    FLDigi, EasyPal and other digital Mode software allows you to broadcast a message in the Waterfall. Hams do it as a matter of course (sending their callsign), usually at the beginning of sending a SLOWSCAN TV message.


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