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Table of Contents
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Summary of Contents for McIntosh MI3
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Page 3: Table Of Contents
The Mclntosh Ml 3 is five laboratory instruments combined into one compact instrument. It is a professional oscilloscope, relative signal strength indicator, calibrated FM deviation meter, calibrated balance meter, and phase indicator. These instruments are used by FM stations GENERAL to determine the best possible performance for your listening enjoyment. -
Page 4: Technical Description
The high voltage power supply uses a selenium rectifier. The low volt- 2. Correct tuning occurs when the display trace is centered hori- age supplies use selenium rectifiers, two gas filled rectangular tubes zontally on the screen. Since the display trace effectively follows and an electronic voltage regulator. -
Page 5: Specifications
SPECIFICATIONS SENSITIVITY Signal Strength (vertical) Input — 700 MV Left Audio (vertical) Input 20 MV Deviation (horizontal) Input ±350 MV Right Audio (horizontal) Input 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;... -
Page 6: Front Panel Information
FRONT PANEL INFORMATION INDICATOR SCREEN—The screen is the face of a cathode tion the indicator trace can be easily moved to the correct ray tube. Calibration marks are provided to allow correct vertical position. For multipath display the trace is positioned at the bottom reference point. -
Page 7: Back Panel Information
The right channel audio signal voltage DEVIATION INPUT (TP2) SIGNAL STRENGTH (VERTICAL) causes a horizontal deflection of the indica- This input connects to a Mclntosh tuner Test MULTIPATH CONTROL tor trace. This input jack is in parallel with Point No. 2, which supplies a voltage pro- This control adjusts the position of the Multipath the right audio output jacks. -
Page 8: Cabinet Installations
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. -
Page 9: Connections
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. Use a connector with male plugs to connect the soldered - in cable from the tuner to the Deviation (horizontal) Input on the Ml 3. - Page 10 Connect a 3 foot low-loss shielded cable from the TEST POINT (on top Connect a low-loss shielded cable from the discriminator output (ahead of tuner chassis) to the Signal Strength (vertical) Input on the Ml 3. of the de-emphasis network) to the Deviation (horizontal) Input on the Ml 3.
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Page 11: Set Up Procedures
the Ml 3 power switch to the ON position. Turn the tuner tuning dial to the desired FM SET UP PROCEDURES station, either stereo or monophonic. Turn the SCOPE TEST switch to TEST. Observe the trace pattern on the Ml 3 indi- Adjust the HORIZONTAL POSITION front cator screen. -
Page 12: System Hook Up
TYPICAL HOOK UP... -
Page 13: Typical Patterns
TYPICAL PATTERNS The oscilloscope display shows you: LEFT TO RIGHT BALANCE SYSTEM PHASE STEREO SEPARATION Here is a stereo system that is out of Here is a display of a system that it is out Here is a display of excellent stereo phase. -
Page 14: Guarantee
Your Ml 3 will give you many years of pleasant and satisfactory performance. If you have any questions concerning the opera- tion 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. - Page 16 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. Be102002...
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