equipment to hear digital type SW signals

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alok

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Sep 1, 2009
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Other then a SW radio and PC what software or other equipment is needed to hear these odd sounds on SW?

Not just CW but all the other non-ham radio digital type modes,are they easy to decipher?

I have an old MFJ Multi-Mode Data Controller but it never did much except for ham radio digital type modes and some utility.

Also what voice mode do I hear that I can't get in either LSB or USB ,but it sounds like voice,that is muffled and squeaky sounding?
How about the strange buzz / horn sounding noise bust I hear that takes up many frequencies ,heard down around 4-5Mhz or sometimes higher up?

thanks,

alok
 

ka3jjz

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Welcome, Alok.

You're actually asking several more questions than what you realize. For decoding digital stuff on HF, see this wiki article for an introduction (note that anything in blue is a link, here or in our wiki)

HF Digital Decoding - The RadioReference Wiki

I'm unsure about this 'voice mode that sounds muffled' - a few freqs to demonstrate what you are hearing is in order. And that signal around 4-5 mhz that takes up many frequencies is, no doubt, CODAR - look it up in WikiPedia for a definition. It's a royal pain - one sits typically around 4800 khz or so, and absolutely ruins things several khz in either direction. Makes hearing XERTA Mexico, among other stations, a real challenge.

You might tell us what receiver you are using. 73 Mike
 

a29zuk

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Also what voice mode do I hear that I can't get in either LSB or USB ,but it sounds like voice,that is muffled and squeaky sounding?

alok
This could be a double sideband transmission. You would need a receiver to reinsert a carrier into the signal to be able to listen to it.
 
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