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Performance Limits

Performance Guarantee

Performance limits are the maximum deviation from

perfection permitted for a Mclntosh instrument. We
promise you that the MR 80, at the time of its pur-

chase, is capable of performance at or exceeding
these limits or you get your money back. Mclntosh is
the only manufacturer that makes this guarantee.

Tuning:

88 to 108MHz

Antenna Inputs:

One 300

W

 balanced and two 75

W

 unbalanced.

Intermediate Frequency:

10.7MHz

Sensitivity:

9.3dBf (1.6

m

V) for 35dB of quieting

14.7dBf (3

m

V) for 50dB of quieting

13.2dBf (2.5

m

V) for 3% total noise and harmonic dis-

tortion

Signal to Noise Ratio:

75dB below 100% modulation

Harmonic Distortion:

0.2% 20Hz to 15kHz, mono or stereo

Typically, 0.08% at 1000Hz

Intermodulation Distortion:

0.15% mono or stereo for any combination of fre-

quencies from 20Hz to 15,000Hz with peak modula-

tion equal to 100% or less. Typically 0.1%

Frequency Response:

Mono and Stereo ± 1dB 20Hz to 15kHz with 75, 50

or 25

m

S deemphasis

Capture Ratio:

1.5dB

Selectivity:

Adjacent channel

Alternate channel

Spurious Rejection:

110dB

Narrow

8dB

90dB

Super Narrow

60dB

110dB

Tuner IM (RF):

-23dBm for 2 signals 1MHz apart

Tuner Intercept Point:

-10dBm 75

W

Image Rejection:

90dB

Maximum Signal Input:

8 volts across 75

W

 (1W) antenna terminal will not

increase harmonic or intermodulation distortion.

Audio Hum:

75 dB down from 100% modulation

Muting:

70dB noise reduction between stations

Muting Threshold:

2

m

V to 1000

m

V

SCA Rejection:

60dB minimum

Stereo Separation:

50dB to 1000Hz

Stereo Filter:

10dB noise reduction

Audio Output:

Variable:

2.5V into 47k

Fixed:

1V into 47k

General Information

Power Requirements:

120 volts 50/60Hz. 25 watts

Semiconductor Complement:
57 Transistors
68 Integrated Circuits
81 Diodes

4 LED Displays

18 LED's

7 Neon Lamps

Mechanical Information

SIZE: Front panel measures 16 inches wide (40.6 cm)

by 5 7/16 inches high (13.8 cm). Chassis measures

14 3/4 inches wide (37.5 cm) by 4 13/16 inches high

(12.2 cm) by 13 inches deep (33 cm), including con-

nectors. Knob clearance required is 1 1/4 inches (3.2

cm) in front of mounting panel.

FINISH: Front panel is anodized gold and black with

special gold/teal  n o m e n c l a t u r e illumination.
Chassis is black.

MOUNTING: Exclusive Mclntosh developed profes-

sional PANLOC

WEIGHT: 27 pounds (12.2 kg) net, 39 pounds (17.7 kg)

in shipping carton

9

Содержание MR80

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 11: ...11 FREQUENCY IN HERTZ FREQUENCY IN HERTZ FREQUENCY IN HERTZ...

Страница 12: ...12 FREQUENCY IN HERTZ FREQUENCY IN HERTZ FREQUENCY IN HERTZ...

Страница 13: ...13 FREQUENCY IN HERTZ FREQUENCY IN HERTZ FREQUENCY IN HERTZ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 19: ...19...

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

Страница 21: ...DIGITAL FM TUNER 21...

Страница 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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