McIntosh MR 71, Руководство пользователя

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MODE SELECTOR
POWER OFF
Turns off the tuner AC power and the AC
outlet on the tuner back panel.
MONO
Provides monophonic FM at both pairs of
left and right channel audio output jacks.
brings the tuning to minimum distortion. The
AFC action repeats itself each time the tuning
dial is moved to a different station.
The amount of AFC action is adjustable
with the AUTO FREQ. CONTROL. Full left
(MIN) position of the control cuts off AFC
action. Full right (MAX) position gives maxi-
mum AFC action.
Normally, the best tuning occurs with the
AUTO FREQ. CONTROL set at or near MAX
position. If several stations are very close
together on the dial, or if a desired station is
very close to a much stronger station, a lower
AFC setting is usually needed for best tuning.
MUTING
STEREO AUTO
The STEREO AUTO position provides both
monophonic FM and FM multiplex stereo at
the left and right channel audio output jacks.
Assume you have the MR 71 MODE SELEC-
TOR in the STEREO AUTO position. You are
listening to a station broadcasting FM mono-
phonic. The station switches to MPX stereo
broadcast. The MULTIPLEX indicator will
light. The MR 71 will automatically switch to
FM multiplex stereo operation. If mono
broadcasting is resumed the MR 71 will
automatically switch to FM monophonic.
AUTO FREQ. CONTROL
The Automatic Frequency Control (AFC)
circuit makes FM tuning easier. It eliminates
the possibility of tuner drift. The AFC circuit
in the MR 71 is electronically delayed in its
action. This is an exclusive Mclntosh devel-
opment. When the tuning dial is moved, the
AFC circuit is temporarily cut off. When the
dial pointer comes to rest on a station the
AFC gradually comes into operation. This
takes three seconds. The AFC automatically
OUT
OUT—This position turns off the muting to
allow conventional tuning with interstation
noise present. Use this setting to listen to
weak or distant stations that have noise or
interference.
IN—This position turns on the muting cir-
cuit. Muting suppresses all background hiss
and noise usually heard when tuning be-
tween stations. Weak or distant stations that
cannot override the background noise and
interference are suppressed by the muting.
PANLOC BUTTONS
At the bottom of the front corners are the
PANLOC buttons. After a tuner is installed on
the PANLOC shelf, depressing the PANLOC
buttons will lock the tuner firmly in position.
Depressing the PANLOC buttons a second
time (as with a ball-point pen> will release the
tuner. The tuner can then be slid forward to
the inspection and adjustment position. The
PANLOC system gives you absolute ease of
installation, operation and maintenance.
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