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Fold out the photographs on the inside of the back

cover. They will assist you in connecting the MR 7083

to your system. The numbers on the photographs refer
to the paragraphs that follow.

Before operating your MR 7083 AM/FM Tuner,

familiarize yourself with the controls and what they
do. The lower half of the front panel is the operating
control center. The field of 6 touchbuttons provides
control of AC power, AM or FM, and audio

processing for stereo, mono, or spatial operation.

The 8 touchbutton field controls the 8 AM and 8 FM

preset stations. The remaining 4 touchbuttons
provide search, enter, and scan up and down. The
knob is the manual tuning control.

The upper half of the front panel is the display

area. It shows the operating status, digitally displays
the station frequency and indicates precise tuning as

well as station signal strength.

A. SIGNAL (STRENGTH) INDICATOR

The SIGNAL indicator is at the right of the

station display area. The horizontal row of nine

LED bar indicators, shows the relative strength of

an FM or AM station being received. The greater

the number of bars illuminated, the greater the

received station's signal strength.

B. TUNING INDICATOR

Three LEDs , two horizontal arrows and

a center dot, located above the SIGNAL indicator,

make up the TUNING indicator. A station is

precisely center channel tuned when the center

dot LED, only, illuminates.

All FM stereo broadcasts will cause the FM MPX

bar indicator to illuminate. It is located to the left

of the SIGNAL and TUNING indicators.

C. STATION FREQUENCY DISPLAY

The ¾" high LED digital display of station fre-

quency on both FM and AM provides a high
degree of accuracy and is easy to read. The

MR 7083 tunes and displays all FM frequencies

88.0 to 108.0 MHz and all AM frequencies 520 to

1710 kHz.

D. POWER ON

The red touchbutton turns the AC power on or

off. When the power is turned on all indicators

illuminate and the tuner returns to the last tuned

station which has been retained in the tuner's
electronic memory.

E. MONO

The MONO touchbutton switches the audio

output of the tuner to MONO and lights the

MONO indicator in the display area. When in FM
and tuned to a stereo broadcast, the program will

be heard as mono and the FM MPX indicator will
be off.

F. SPATIAL

The SPATIAL touchbutton connects a Mclntosh

audio processor which influences both frequency
distribution and phase relationships to provide
enhanced special sound distribution. You will

hear an enhanced sound in both AM and FM. It

operates in both mono and stereo. When in
SPATIAL the LED under the title illuminates.

G. STEREO

The STEREO touchbutton provides automatic,

FM station activated, stereo/mono operation and
lights the LED under the STEREO indicator in the

display area.

H. AM

The AM touchbutton switches to the AM

circuits of the tuner. The station display area will

show the AM station frequency in kilohertz.

I. FM

The FM touchbutton switches to the FM circuits

of the tuner. The station display area will show

the FM station frequency in megahertz.

J. SEARCH

The SEARCH touchbutton causes the stations

held in the memory for touchbuttons 1 thru 8 to
be previewed for 5 seconds each. A second touch
stops SEARCH.

K. PRESET STATION SELECTING TOUCHBUTTONS

A momentary press on one of the touchbuttons

marked 1 thru 8 will recall from the electronic
memory the preset FM or AM station assigned to

that touchbutton. The corresponding green

indicator above the numbered touchbutton will

light.

L. ENTER

The ENTER touchbutton and any one of the

eight momentary touchbuttons is used to insert a
station into the electronic memory. Eight FM and
eight AM stations can be preset.

To enter a station in the memory, tune to the

FRONT PANEL CONTROLS 9

Содержание MR 7083

Страница 1: ......

Страница 2: ...ter and Moisture Do not use the instrument near water for example near a bathtub washbowl kitchen sink laundry tub in a wet basement or near a swimming pool etc 11 Cleaning Clean the instrument by dus...

Страница 3: ...thin an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance The serial number...

Страница 4: ...costs to and from the authorized service agency or the factory 2 Any Mclntosh authorized service agency will repair all Mclntosh instruments at normal service rates To receive the free service under t...

Страница 5: ...e features that set the MR 7083 apart from the ordinary are The advanced AM FM tuner design of the MR 7083 displays the station frequencies digitally Stations are selected easily in any one of these w...

Страница 6: ...in a Mclntosh cabinet follow the instructions that are enclosed with the cabinet For any other type of installation follow these instructions 1 Unpack from Carton Open the carton and remove the PANLOC...

Страница 7: ...hicker panels use the 1 1 4 31 8mm long screws Using two screws of the proper length in the A holes on each side attach the PANLOC brackets to the cabinet panel the short flange is mounted against the...

Страница 8: ...grammed stations on FM or AM and scan the entire FM or AM band 4 AM ANTenna Adjust the AM loopstick for best AM reception Do not leave it positioned against the back panel To do so will reduce the sig...

Страница 9: ...e best noise and multipath rejection many antennas use 300 ohm twin lead In this case use a matching transformer balum to convert a 300 ohm antenna to the 75 ohm input impedance of the tuner 6 SCOPE O...

Страница 10: ...OURCE HIGHSENSITIVITY AM LOOPSTICK ANTENNA VARIABLE OUTPUT ADJUSTMENT TO MclNTOSH INFRARED REMOTE CONTROL EQUIPMENT OSCILLOSCOPE ALTERNATE CONNECTION TO FIXED LEVEL OUTPUT MclNTOSH PREAMPLIFIER 8 CONN...

Страница 11: ...requencies 520 to 1710 kHz D POWER ON The red touchbutton turns the AC power on or off When the power is turned on all indicators illuminate and the tuner returns to the last tuned station which has b...

Страница 12: ...station either up or down the selected broadcast band The arrow beside the touchbutton indicates the direction of scan N TUNING KNOB Rotate the tuning knob until the correct frequency shows in the dis...

Страница 13: ...input 50 ohm source input SIGNAL TO NOISE RATIO 50dB at 30 modulation 60dB at 100 modulation HARMONIC DISTORTION 0 5 maximum at 30 modulation FREQUENCY RESPONSE 50Hz to 6000Hz NRSC ADJACENT CHANNEL SE...

Страница 14: ...5 0 5 10 15 FREQUENCY IN kHz 12 PERFORMANCE CHARTS R E S P O N S E I N d B F R E Q U E N C Y IN Hz 100 1k 10k 20k 20 10 0 1 0 20 30 40 50 60 70 A U D I O O U T P U T I N d B I N P U T L E V E L IN dB...

Страница 15: ...oelectric filters and 2 integrated circuits They combine to provide over 120dB of gain and a selectivity greater than 70dB Limiting muting signal strength drive and FM detection are all functions of t...

Страница 16: ...t almost any type of antenna In a location of moderate signal strength and little interference few fluorescent lights motors TV sets etc the new Low Impedance Loopstick will give good performance In a...

Страница 17: ...MR 7083 BLOCK DIAGRAM 15...

Страница 18: ...THE LOCATION OF CONTROLS The numbers and letters correspond to the paragraphs on pages 6 7 9 and 10...

Страница 19: ......

Страница 20: ......

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