Owner's Manual

16
3. Proceed to the next Setup Menu Item or press the
MONO/SETUP Push-button to exit the Setup
Mode. “How to operate the Tuner” starts on page
20.
stations received, most will be listenable), refer to
figure 5.
3. Proceed to the next Setup Menu Item or press the
MONO/SETUP Push-button to exit the Setup
Mode. “How to operate the Tuner” starts on page
20.
3. Proceed to the next Setup Menu Item or press the
MONO/SETUP Push-button to exit the Setup
Mode. “How to operate the Tuner” starts on page
20.
FM Scan Sensitivity
Depending on reception conditions
2
the received FM
Station Signals can vary from totally listenable to
just barely listenable. The MR87 FM Tuner Circuitry
incorporates a Variable Sensitivity Control allowing
you to determine the listening quality of FM Stations
it will stop on during the Scanning Mode. To accom-
plish this perform the following steps:
1. Press the MONO/SETUP Push-button until the
Setup Mode is active. Then rotate the PRESET/
MENU Control to select Setup Menu item “FM
SCAN SENSITIVITY”. Refer to figure 3.
2. Rotate the TUNE/ADJUST Control clockwise
to increase the Scan Sensitivity (more stations
received, however some might not be listenable),
refer to figure 4.
Rotate the TUNE/ADJUST Control counter-
clockwise to decrease the Scan Sensitivity (less
2
Distance from the radio station, radio station power out-
put, placement and type of the FM Antenna, multipath
interference and atmospheric conditions.
Figure 6
FM SCAN SENSITIVITY
LESS MORE
||
Figure 7
FM SCAN SENSITIVITY
LESS ýýýýý MORE
AM Scan Sensitivity, con’t
Figure 8
FM SCAN SENSITIVITY
LESS ýýýýýý MORE
Stereo Blend
The MR87 allows changes in the amount of Stereo
Separation via the Stereo Blend Function. When
receiving weak FM Stereo Broadcasts any background
noises can be reduced by blending some of the left
and right channel information together, while still
maintaining “The Stereo Effect”. To change from the
Normal Setting perform the following steps:
1. Press the MONO/SETUP Push-button until the
Setup Mode is active. Then rotate the PRESET/
MENU Control to select Setup Menu item
“SETUP: STEREO BLEND NORMAL”. Refer to
figure 9.
2. Rotate the TUNE/ADJUST Control to select
“LESS NOISE” for a reduction in background
noise or select “MORE SEPARATION” with a
possible increase in background noise over the
NORMAL Setting. Refer to figures 10 and 11.
Figure 9
SETUP: STEREO BLEND
NORMAL
Figure 11
SETUP: STEREO BLEND
MORE SEPARATION
Figure 10
SETUP: STEREO BLEND
LESS NOISE
Deemphasis
The FM Transmission Standard uses Preemphasis
(boosting the volume level of the high frequencies) of
the audio signal before transmssion. Inside the tuner
Deemphasis (cutting the volume level of the high
frequencies) is used to return the audio signal to the
correct high frequency volume levels. The use of Pre-
emphasis and Deemphasis helps to reduce losses and
noises during the transmission/receive process. There
are two different settings for Preemphasis/Deempha-
sis used today, one is 75μS (microseconds) and other
is 50μS. Your Tuner was set to the standard used in
your Country. For additional information contact your
McIntosh Dealer or FM Broadcasters in your area for
the correct setting. To change Deemphasis Setting,
perform the following steps:
1. Press the MONO/SETUP Push-button until the
Setup Mode is active. Then rotate the PRESET/
MENU Control to select Setup Menu item “SET-
UP: DEEMPHASIS _ _uS”. Refer to figures 12
and 13.