Jose,

The FM component goes out the same in all directions from the VOR
station. The AM component varies with the angle from the station.
North of the station there is no phase difference. At 45 degrees the
AM component lags the FM component by 45 degrees, and so on. The AM
component is phase shifted by a phased-array of antennas around the
VOR station.

Dean

(Teacherjh) wrote in message ...

The VOR signal out of the receiver is a 9960Hz sine wave that is AM
modulated at 30Hz and FM modulated at 30Hz. The phase difference
between the AM and FM signals is the bearing to the station.


How does that work. =Something= has to be directional, no?

Jose