User manual MCINTOSH MCMR65B

[. . . ] We also guarantee the mechanical and electrical workmanship and components to be free of defects for a period of 90 days from date of purchase. If such defects occur, Mclntosh Laboratory or one of its authorized agencies will repair the defect at no cost to the purchaser. This guarantee does not extend to components damaged by improper use nor does it extend to transportation to and from the factory or service agency. THREE YEAR FACTORY SERVICE CONTRACT An application for a FREE THREE YEAR FACTORY SERVICE CONTRACT is included with this manual. Mclntosh will provide all parts, materials and labor needed to return the measured performance of the instrument to the original performance limits free of any charge. [. . . ] ANTENNA CONNECTION STRIP Provides easy push type connectors for 300 ohm FM antenna and a ground connection. FM ANTENNA -75 OHM Provides a "type F" connector for a 75 ohm unbalanced FM antenna. AUDIO OUTPUTS The left-hand pair of AUDIO OUTPUT jacks provides FIXED OUTPUT audio signals. The program at these jacks is not affected by the MCMR65B front panel VOLUME control. Use these output jacks to connect the tuner to a stereo control preamplifier or other equipment which has its own volume control. The right hand pair of AUDIO OUTPUT jacks provides a FRONT PANEL CONTROLLED audio signal. The program at these jacks is controlled by the MCMR65B front panel VOLUME control. Use these output jacks to connect to external power amplifier, tape recorders, or any equipment where continuous front panel control of tuner output volume is desirable. It sets the output level of the tuner FRONT PANEL CONTROLLED AUDIO OUTPUT jacks. Turning the volume control fully counterclockwise turns the AC power off. Logging scale - marked 0 to 100 The logging scale can be used to accurately retune any station. You may find it easier to keep a record of your favorite stations by use of the logging scale. With the METER switch set to MULTIPATH, there is little or no multipath interference when the meter indication remains steady and at the left end of the scale. The station is properly tuned when the TUNING meter pointer comes to rest anywhere over the black area on the meter scale. While tuning across the dial you may notice movement of the tuning meter pointer without hearing a station. This is caused by a station so weak or distant that it does not over-ride the background noise. Extremely weak stations may be heard by setting the MUTING switch to OUT. Rotate the directional antenna for best reception as indicated by a maximum pointer deflection on the SIGNAL STRENGTH meter and a minimum pointer deflection on the MULTIPATH meter. STEREO FM PROGRAMS If you wish the tuner to automatically switch between stereo and mono broadcasts, set the: MODE switch to STEREO AUTO MUTING switch to DISTANT SELECTIVITY switch to NORMAL In this mode of operation, setting the FILTER switch to position 1 or 2 will reduce noise on weak stereo stations. When the STEREO indicator is lighted, the station is broadcasting a 19, 000 Hz pilot signal for stereo and the MCMR65B will automatically switch to stereo. If a station is not transmitting the 19, 000 Hz pilot for stereo, the STEREO indicator will remain off and the tuner will automatically switch to mono. When the MODE switch is set to STEREO ONLY, monophonic broadcasts and background noise between stations will be muted. Broadcasts with the 19, 000 Hz pilot signal will activate an automatic stereo sensing circuit. [. . . ] The Rimo filter, designed from a FORTRAN computer program, is the most general class of minimum-phase constantdelay filter. Using numerical integration in the S-plane, an "IBM" 1130 high speed computer spent eighteen minutes on the mathematics for the design of the IF filter. It would have taken an engineer, working twenty-four hours a day, seven days a week, and working error-free three-hundred years to perform the same mathematical calculations. The MCMR65B filter has less than 1. 0% delay distortion from antenna input to discriminator output. [. . . ]