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Your MR 80 Digital FM Tuner
can give you many years of
satisfactory performance. If you
have any questions, please contact:

CUSTOMER SERVICE

Mclntosh Laboratory Inc.

2 Chambers Street

Binghamton, New York 13903-9990
Phone: 607-723-3512

Take Advantage of 3 years

of Contract Service ...

Fill in the Application NOW.

Contents

SERVICE CONTRACT INFORMATION . . . 1

INSTALLATION  . . 2

HOW TO CONNECT AND

BACK PANEL INFORMATION...4

FRONT PANEL INFORMATION

AND USE OF CONTROLS. . .6

TOP PANEL INFORMATION

AND SECONDARY CONTROLS . . .8

PERFORMANCE LIMITS . . .9

PERFORMANCE CHARTS. -10

TECHNICAL DESCRIPTION. 14

BLOCK DIAGRAM..20

MclNTOSH THREE YEAR SERVICE CONTRACT

An application for A THREE YEAR SERVICE CONTRACT is included with this manual.

The terms of the contract are:

1. Mclntosh will provide all parts, materials

and labor needed to return the measured

performance of the instrument to the

original performance limits. The SER-
VICE CONTRACT does not cover any
shipping costs to and from the authoriz-
ed service agency or the factory.

2. Any Mclntosh authorized service agency

will repair Mclntosh instruments at nor-

mal service rates. To receive service

under the terms of the SERVICE CON-

TRACT, the SERVICE CONTRACT CER-

TIFICATE must be presented when the

instrument is taken to the service agency.

3. Always have service done by a

Mclntosh authorized service agency. If

the instrument is modified or damaged

as a result of unauthorized repair, the

SERVICE CONTRACT will be cancelled.

Damage by improper use or mishandl-
ing is not covered by the SERVICE

CONTRACT.

4. The SERVICE CONTRACT is issued to

you as the original purchaser. To pro-
tect you from misrepresentation, this

contract cannot be transferred to a se-

cond owner.

5. To receive the SERVICE CONTRACT,

your purchase must be made from a

Mclntosh franchised dealer.

6. Your completely filled in application for

the SERVICE CONTRACT must be post-

marked within 30 days of the date of
purchase of the instrument.

7. To receive the SERVICE CONTRACT, all

information on the application must be

filled in. The SERVICE CONTRACT will

be issued when the completely filled in

application is received by Mclntosh

Laboratory Incorporated in Binghamton,

New York.

8. Units in operation outside the United

States and Canada are not covered by
the Mclntosh Factory Service Contract,

irrespective of the place of purchase.
Nor are units acquired outside the
U.S.A. and Canada, the purchasers of

which should consult with their dealer
to ascertain what, if any, service con-
tract or warranty may be available locally.

Copyright 1980 © by Mclntosh Laboratory Inc.

1

Summary of Contents for MR80

Page 1: ...Reading Time 32 Minutes Price 2 00 THE MclNTOSH MR 80 DIGITAL FM TUNER...

Page 2: ...the rear panel of the chassis Record that serial number here Serial Number The model serial number and purchase date are important to you for any future service Record the purchase date here Purchase...

Page 3: ...RACT CER TIFICATE must be presented when the instrument is taken to the service agency 3 Always have service done by a Mclntosh authorized service agency If the instrument is modified or damaged as a...

Page 4: ...tenna jack A flexible folded dipole antenna supplied with your MR 80 may be used in urban or in high signal strength areas The flexibility of the thin flat wire assembly permits it to be placed under...

Page 5: ...R 2ND 75W ANTENNA LEAD IN FM ANTENNA OPTIONAL 75W ANTENNA LEAD IN REMOTE CONTROL PUSH BUTTON POWER AMPLIFIER PREAMPLIFIER LEFT SPEAKER RIGHT SPEAKER 5 MAXIMUM PERFORMANCE INDICATOR OR OSCILLOSCOPE TO...

Page 6: ...4 These touch pads located to the left of the fre quency display select one of the four preset sta tions Just touch to operate A small rectangle will light above the pad indicating which preset has b...

Page 7: ...ono 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 will be re...

Page 8: ...INPUT switch selects either an antenna or cable as the RF input source The CABLE input may also be used as a second antenna input Lock This switch will disable the lock circuits only when the main tun...

Page 9: ...on 110dB Narrow 8dB 90dB Super Narrow 60dB 110dB Tuner IM RF 23dBm for 2 signals 1MHz apart Tuner Intercept Point 10dBm 75W ImageRejection 90dB Maximum Signal Input 8 volts across 75W 1W antenna termi...

Page 10: ...Performance Charts SIGNALINPUT 10 SIGNAL INPUT...

Page 11: ...11 FREQUENCY IN HERTZ FREQUENCY IN HERTZ FREQUENCY IN HERTZ...

Page 12: ...12 FREQUENCY IN HERTZ FREQUENCY IN HERTZ FREQUENCY IN HERTZ...

Page 13: ...13 FREQUENCY IN HERTZ FREQUENCY IN HERTZ FREQUENCY IN HERTZ...

Page 14: ...on ordinary tuners Constant delay design techniques are used in the 4 pole 4 zero crystal filter used in the SUPER NAR ROW position However due to the extreme selec tivity delay distortion is very sli...

Page 15: ...is for use with an external noise reduction adapter An electronically switched filter circuit im plemented with two J FETs of a quad J FET package is used to reduce out of phase noise when in the ste...

Page 16: ...he scan circuitry on the tuning control logic board The logic circuitry will then select the auto scan circuit and start searching for the next acceptable station The direction of scan will be the las...

Page 17: ...and in hibit the lock circuit under these conditions On the top cover control panel is a manual lock ON OFF switch that inhibits the lock circuit only if the tuner is in the main tuning knob mode This...

Page 18: ...the IF offset by adding the negative of the IF frequency The gate signal is derived from a stable 200kHz crystal oscillator and a binary divider made from LS integrated circuits Two other signals are...

Page 19: ...19...

Page 20: ...Block Diagram 20 MclNTOSH MR 80...

Page 21: ...DIGITAL FM TUNER 21...

Page 22: ...MBERS ST BINGHAMTON N Y 13903 9990 607 723 3512 The continuous improvement of its products is the policy of Mclntosh Laboratory Incorporated who reserve the right to improve design and price without n...

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