[Fwd: LF: Luxembourg Effect...]
Wed, 02 Sep 1998 08:58:58 -0400
DEREK ATTER wrote:
> Re: The "wobbly" carrier of the 183Khz AM station which you observed.
> Several of the medium wave broadcast station have sub-audible data encoded
> by phase modulation on the signal which becomes noticeable when a BFO is
> used. That is what you can probably hear. For example, the BBC station on
> 198Khz is also used as a frequency standard has sub-audible phase modulated
> data giving date / time and current deviation from UTC etc.
> 73, Derek G3GRO