MI3 INDICATOR MAXIMUM PERFORMANCE
DESCRIPTION The Mclntosh Ml 3 Maximum Performance Indicator makes it easy for you to attain professional broadcasting quality FM listening. MAXIMUM PERFORMANCE GENERAL The Mclntosh Ml 3 shows you what you need to do to improve your system's overall performance. It is designed to be used with an FM tuner and stereo preamplifier. THANK YOU for purchasing this Ml 3. To insure your enjoyment please read this manual carefully and follow instructions.
2. Correct tuning occurs when the display trace is centered horizontally on the screen. Since the display trace effectively follows the tuner I.F. response curve, centering the trace tunes the detector to the center of the I.F. curve. The Ml 3 Maximum Performance Indicator is a versatile instrument. When used with either a stereo preamplifier, or power amplifier the Ml 3 when switched to the L+R AUDIO position will show you the character of the audio signals present. The Ml 3 will: 1.
MI3 SPECIFICATIONS SENSITIVITY Signal Strength (vertical) Input Left Audio (vertical) Input Deviation (horizontal) Input Right Audio (horizontal) Input — 700 MV 20 MV ±350 MV 20 MV DIMENSIONS Front panel: 16 inches wide by 5-7/16 inches high; chassis (including PANLOC shelf) 15 inches wide by 5 inches high by 13 inches deep, including connectors; clearance in front of mounting panel including knobs, 1 ½ inches. TUBE AND SEMICONDUCTOR COMPLEMENT 1—3RP1, 3 inch cathode ray tube.
FRONT PANEL INFORMATION INDICATOR SCREEN—The screen is the face of a cathode ray tube. Calibration marks are provided to allow correct positioning of the indicator trace. tion the indicator trace can be easily moved to the correct vertical position. For multipath display the trace is positioned at the bottom reference point. A correctly tuned station free of multipath distortion appears as a smooth curve centered on the indicator screen vertical scale.
SIGNAL STRENGTH (VERTICAL) MULTIPATH CONTROL This control adjusts the position of the Multipath trace display along the vertical scale of the indicator screen. DEVIATION (HORIZONTAL) MULTIPATH CONTROL This control adjusts the maximum width of the multipath trace display along the horizontal scale of the indicator screen. LEFT GAIN (VERTICAL) AUDIO CONTROL This control adjusts the maximum vertical indicator trace deflection for a left channel audio signal.
HOW TO INSTALL YOUR Ml 3 IN A CABINET 1 Use the mounting template to position where you will mount the instrument. NOTE: The template lets you position the cutout from the front of the panel. 2 Mark the "A" and "B" drill holes. 3 Mark the four corners. Join the four corners to make a rectangle. Use the edge of the template as a straight edge. 4 Drill the mounting holes and cut out the rectangular hole. 5 Fasten the two mounting strips to the panel. Use two of the fillisterhead screws provided.
cable to the tuner chassis ground. Use one of the 1 foot long low-loss shielded cables, stripped and tinned on one end (female jacks on the other end) supplied with the Ml 3. TWO PAIRS OF 3 FOOT LONG LOW LOSS SHIELDED CABLES ARE SUPPLIED WITH THE Ml 3. USE THESE CABLES TO CONNECT THE Use a connector with male plugs to connect the soldered - in cable from the tuner to the Deviation (horizontal) Input on the Ml 3.
Connect a 3 foot low-loss shielded cable from the TEST POINT (on top of tuner chassis) to the Signal Strength (vertical) Input on the Ml 3. Connect a 3 foot low-loss shielded cable from the FM multiplex output jack on the tuner back panel to the Deviation (horizontal) Input on the Ml 3. Connect a low-loss shielded cable from the discriminator output (ahead of the de-emphasis network) to the Deviation (horizontal) Input on the Ml 3.
SET UP PROCEDURES the Ml 3 power switch to the ON position. Turn the SCOPE TEST switch to TEST. MULTIPATH AND TUNING INDICATION Adjust the HORIZONTAL POSITION front panel control until the trace dot is centered horizontally on the indicator screen. Calibration lines are provided on the indicator face for centering purposes. Adjust the VERTICAL POSITION front panel control until the trace dot is positioned at the bottom center of the vertical scale.
TYPICAL HOOK UP 10
TYPICAL PATTERNS The oscilloscope display shows you: STEREO SEPARATION Here is a display of excellent stereo separation. The Ml 3 shows the stereo separation from all stereo program material. You see the display change position and shape with the program material. You interpret what the display means to your listening enjoyment. You see what makes a good stereo record sound good. With practice you know why your records sound the way they do.
Your Ml 3 will give you many years of pleasant and satisfactory performance. If you have any questions concerning the operation or maintenance of this indicator please contact: Customer Service Mclntosh Laboratory Inc. 2 Chambers Street Binghamton, New York 13903 Our telephone number is 723-5491. The direct dial area code is 607. GUARANTEE Mclntosh Laboratory Incorporated guarantees this equipment to perform as advertised.
MclNTOSH LABORATORY INC. 2 CHAMBERS ST., BINGHAMTON, N. Y. 13903 607-723-3512 Design sub|ecl to change without notice. Printed In U.S.A.
