6945-6948U, 02152014,2330utc, some type of data stream?

[Bill F]

any idea what this is?  I've heard it last nite and tonight with just a discone and dipole in the attic. I can imagine what it would be if the good antennas were up.   the signal is strong about s9+20.

[Token]

This is STANAG 4481 FSK.  850 Hz shift, 75 bd, KG-84 encrypted.  What a lot of people call 850 Hz shift RTTY when they see it, or RATT.  However, the transmitter or the audio is very messed up, and there is a lot of noise in the passband of the transmitter.

T!

[RCCI]

Wow! What a signal----Every night it's been blasting S9+20. Any idea of it's QTH and power output? Hopefully "someday" it will move. 

[Nella F.]

This is STANAG 4481 FSK.  850 Hz shift, 75 bd, KG-84 encrypted.  What a lot of people call 850 Hz shift RTTY when they see it, or RATT.  However, the transmitter or the audio is very messed up, and there is a lot of noise in the passband of the transmitter. T!

Yeah, but could you dumb it down just a bit what is it?  I'm pretty much still living in analog land.

[glimmer twin]

STANAG4481 FSK ( STANAG= STANdardization AGreement)  is navy HF shore to ship broadcast system.

[Nella F.]

STANAG4481 FSK ( STANAG= STANdardization AGreement)  is navy HF shore to ship broadcast system.

Kool! Thanks!

[Token]

Think of it as modern day RTTY.  It uses the same basic technique as old school RTTY, but it does not carry strictly the same thing anymore.

T!