Yamaha CR-840 Owner's Manual page 12

MULTIPATH DETECTION
FM multipath is somewhat like the TV "ghost''
phenomenon. As shown in Fig. 5 , some FM
signals are received directly by the antenna while
others reach it from many directions, bouncing off
buildings or mountains. The latter are called
multipath waves. These are received slightly later
than the direct waves, and this causes some sound
distortion and deterioration in separation and
tonal quality. This multipath effect can be mini¬
mized by using a tall antenna with good direction¬
al characteristics and by careful orientation so as
to eliminate interference.
During FM reception, a delicate quiver of the
signal meter indicator indicates multipath inter¬
ference. Change your antenna orientation or posi¬
tion so that the indicator stabilizes.
Fig. 5
1 1