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.

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

  1. 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.

  2. 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!


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