HFU HF Underground

Loggings => Other => Topic started by: FFZ on March 21, 2014, 0618 UTC

Title: Very strange digital mode on 8.580MHz
Post by: FFZ on March 21, 2014, 0618 UTC

Caught this tonight on 8.580MHz.  It sounds like the Decepticons from the movie Transformers.  But really, what is this???

http://youtu.be/-c84HBwT2Gw (http://youtu.be/-c84HBwT2Gw)

Title: Re: Very strange digital mode on 8.580MHz
Post by: Token on March 21, 2014, 1319 UTC

Saab Grintek MHF-50 modem.  Most often used by the South African Navy (maybe the only regular user of this modem?).  8580 kHz is a common frequency for this signal, and is often paired with 12982 kHz USB.

T!