PERFORMANCE SPECIFICATIONS
2
NOTES
1. The heavy notes on the schematic denote the primary
signal path.
2. Unless otherwise noted, all voltages indicated on the
schematics are measured under the following conditions:
a. AC input at 120 volts, 50/60Hz.
b. All voltages are +/-10% with respect to ground. A
high impedance (10 megaohm) voltmeter must be used.
3. Unless otherwise specified:
a. Resistor values are in ohms.
b. Capacitor values are microfarads (uF).
c. Inductor values are in microhenries (uH).
4. On PC board drawings, Square pad indicates:
a. Polarized Capacitors - Positive
b. Diodes - Cathode
c. Others - Pin 1
5. WARNING
Parts marked with the symbol have critical
characteristics. Use only replacement parts recom-
mended by the manufacturer.
FM Tuner Specifications
Useable Sensitivity
14dBF which is 1.4uV across 75 ohms
50dB Quieting Sensitivity
Mono: 19dBF which is 2.4uV across 75 ohms
Stereo: 35dBF which is 15uV across 75 ohms
Signal To Noise Ratio
Mono: 75dB
Stereo: 70dB
Frequency Response
Mono: + 0, - 1dB from 20 to 15,000Hz
Stereo: + 0, - 1dB from 20 to 15,000Hz
Harmonic Distortion
Mono: 0.3% at 100Hz
0.3% at 1,000Hz
0.3% at 10,000Hz
Stereo: 0.45% at 100Hz
0.45% at 1,000Hz
0.65% at 10,000Hz
Intermodulation Distortion
Mono 0.25%
Stereo0.45%
Capture Ratio
1.2dB
Alternate Channel Selectivity
75dB
Spurious Response
100dB
Image Response
75dB
RF Intermodulation
65dB
Stereo Separation
45dB at 100Hz
45dB at 1,000Hz
35dB at 10,000Hz
SCA Rejection
65dB
AM Tuner Specifications
Sensitivity
20uV External Antenna Input
Signal To Noise Ratio
48dB at 30% modulation
58dB at 100% modulation
Harmonic Distortion
0.5% maximum at 50% modulation
Frequency Response
50Hz to 6kHz NRSC
Adjacent Channel Selectivity
45dB minimum IHF
Image Rejection
65dB minimum from 540 to 1600kHz
IF Rejection
80dB minimum
General Specifications
Rated Output
Fixed output: 1.2 Volts
Variable output: 0 - 1.2 Volts
Output Impedance
Less than 100 ohms
Power Requirements
100 Volts, 50/60Hz at 20 watts
110 Volts, 50/60Hz at 20 watts
120 Volts, 50/60Hz at 20 watts
220 Volts, 50/60Hz at 20 watts
230 Volts, 50/60Hz at 20 watts
240 Volts, 50/60Hz at 20 watts
Note: Refer to the rear panel of the MR85 for the correct voltage.
Dimensions
17-1/2” (44.5cm) W, 5-3/8” (13.7cm) H, 17-1/2” (44.5cm) D,
(including clearance for connectors)
Weight
25.5 pounds (11.6 kg) net, 43 pounds (19.5 kg) in
shipping carton
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