McIntosh MR80, Owner'S Manual

Page: 7 / 22

SIGNAL COLUMN
A column of LED lamps respond to the signal
strength of the station being received. The stronger
the signal the higher the column reaches. There is a
control on the tuner top panel to adjust the column
height for f u l l scale when receiving the strongest
signal in your listening area.
FILTER SWITCH AND FUNCTION INDICATOR
The MR 80 FILTER switch provides automatic
stereo noise reduction on weak stereo stations. With
the switch in the AUTO position the f i l t e r w i l l be on
only when the station is broadcasting a stereo pilot
tone and the signal strength is below 100 microvolts.
With the s w i t c h in the IN position the f i l t e r is con-
nected at all times. The f i l t e r has no a f f e c t on mono
stations. The f i l t e r f u n c t i o n indicator light glows
green when the f i l t e r is on.
MODE SWITCH
A two position MODE switch is provided so that
you may select either automatic stereo or mono
reception. In the STEREO position the tuner
automatically switches from mono to stereo mode
when a pre-determined signal to noise ratio has
been reached. In the MONO position all stations w i l l
be received monophonically but the STEREO indicator
will light if the s t a t i o n is broadcasting in stereo.
HEADPHONE JACK
A HEADPHONE jack is provided to drive low im-
pedance dynamic headphones from an internal
power amplfier.
SCAN CONTROL
The SCAN control adjusts the speed at which the
tuner searches for the next station, when using the
AUTO SCAN mode of tuning. If the dial is crowded
with stations use a slow scan speed. If there are few
stations fast scanning can be used.
MUTING CONTROL
MUTING suppresses the background noise and
hiss normally heard between stations. Turning the
control counterclockwise to the OUT position dis-
ables the muting c i r c u i t s . Turning the control clock-
wise increases the signal level required to unmute.
This control also adjusts the s e n s i t i v i t y of the AUTO
SCAN tuning circuits and the number of stations
you w i l l receive when using this tuning mode.
7