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Signal-to-Noise Ratio*   >65dB 
 
Frequency Response*   

10Hz to 10MHz + 0.1/-0.3dB 

Compatibility 

 

  3-Channel 

(Y/Pb/Pr), format-independent 

 
Switching 

 

  Passive 

 
Impedance  

 

 

75

Ω 

 

 

Bandwidth  

 

 

>150MHz 

 
Insertion Loss*  

 

<3dB 

 

Input    

 

 

4 3.5 miniature phone jacks 

 
Input Sensitivity 

 

10mVrms (400mV maximum input level) 

 
Input Impedance   20k

Ω (accepts balanced or unbalanced input signals) 

 

 

Trigger Outputs  

1 power on/off and 1 programmable connector on detachable screw 
terminals (+12 VDC, 0.5 amps each) 

 
RS-232 Serial Input/Output  

2 9-pin D-sub connectors 

 
Power Requirements  

90-250 VAC, 50-60Hz, 60W (universal line input), detachable power cord 

 

Height (with feet): 3.81 inches (97mm) 

Width: 17.3 inches (440mm) 

Depth: 14.85 inches (377mm) 

Weight: 17lb (7.6kg) 

 

 

 

 

3-3

Height (with feet): 5.04 inches (128mm) 

Width: 17.3 inches (440mm) 

Depth: 14.85 inches (377mm) 

Weight: 24lb (10.7kg) 

Rack Mounting  

Optional brackets are available for installation in a standard 19" 
equipment rack (2 rack units required for MC-8; 3 rack units for MC-8 
Balanced) 

 
Environment 

Temp: 0° to 35°C (32° to 95°F) 

 

 

Storage Temp: -30° to 75°C (-22° to 167°F) 

 

Relative Humidity: 95% maximum without condensation 

 
Remote Control  

 

Hand-held, backlit infrared remote control unit, preprogrammed & 

 learning 

 

Requires two AA batteries (alkaline batteries recommended) 

 

 
*

Specifications are subject to change without notice. 

 

 

3-4

This section describes a quick verification of the operation of the MC-8 and the integrity of its analog and 
digital audio signal paths. Tests that are specifically included for the MC-8 Balanced version can be 
omitted when testing an MC-8. 

 

1.  Inspect the MC-8 for obvious signs of physical abuse. 

2.  Verify that all switches operate smoothly. 

3.  With the power off for ten minutes and the AC cord disconnected, remove the MC-8 top cover using a 

hex wrench (2.5mm). Remove the 13 screws on the top cover of the unit to remove the cover. 

4.  Verify that all socketed ICs are correctly seated. 

5.  Verify that all cables are correctly installed and are securely fastened. 

6.  Check for burnt or obviously damaged components. 

7.  Put the top cover back on.  

8.  Power on the MC-8 using the main power switch on the back of the unit, and verify that the MC-8 

runs through its Power On Diagnostics. 

9.  Check each of the front panel switches for smooth mechanical operation, verify each LED turns on 

and off when the associated switch is depressed, and that the display acknowledges each switch 
function. 

10.  Press each button on the remote and verify that the MC-8 is responding to all the remote commands. 

 

 

 

 

 

 

 

 

 

4-1

The following tests verify the basic functions of the MC-8. 

 

 

1.  Set the variable AC supply to 120 volts. 

2.  Verify that the MC-8 is powered off at its rear panel power switch. 

3.  Connect the power cord between the supply and the MC-8. 

4.  Remove the top cover. 

5.  Check for power supply shorts to ground.  

6.  Turn on the MC-8 using the rear main power switch. 

7.  Power on the unit at 120VAC. 

8.  Verify the current draw on the Variac does not exceed 0.6 amps.  

9.  Using a DMM, measure all the power supply rails as stated in the tables below, being sure to use the 

MC-8 chassis as ground. 

10.  Verify that all the voltages are within the tolerance range shown below. 

 

+5VD 

4.75 - 5.25 

Red wire at J45 behind front panel center at volume 
knob left to ground 

Battery 

≥ 2.5 

Right side to the Left of U69, measure the top of the 
battery to ground 

+15V 

15.00 - 16.95 

Yellow wire at J32 to ground 

-15V 

-14.25 - 15.75 

Blue wire at J32 to ground 

+5VAD 

4.75 - 5.25 

Red wire at J32 to ground 

-5VA 

-4.75 - 5.25 

Gray wire at J32 to ground 

 

 

4-2