Yamaha CR-840 Owner's Manual page 11

Fig. 2
FM MUTING/OTS SWITCH
This push-button switch should normally be left in
the ON position. If pushed into the OFF position,
it will over-ride the OTS circuits, allowing full
manual tuning, but preventing the automatic
correction of slight mis-tuning and of drift due to
the influence of temperature and humidity. Switch
OFF for reception of weak stations near powerful
local stations which might be 'pulled in' by the
OTS. If you decide that the weakest stations
cannot give you sufficient listening enjoyment,
leave this control in the FM MUTING/OTS ON
position. The weakest stations will be cut out,
along with the interstation noise. You will be able
to tune from station to station, sure of good
quality reception, free of background noise and
remote, very poor quality stations.
Fig. 3
SIGNAL QUALITY METER
The SIGNAL QUALITY meter, as well as giving a
reading for the signal strength of AM and FM
station signals, also gives a visual indication of FM
signal quality. When so-called 'multipath' (waves
reflected from nearby hills or tall buildings) are
present, the meter pointer will oscillate, centering
on the average value of the signal strength.
If you notice such variations in the SIGNAL
QUALITY meter readings, try different antenna
orientations. You will generally enjoy better tonal
quality if you orient the antenna to give a steady
reading, even if this level is a little lower than the
maximum when the indication is fluctuating.
Fig. 4