User manual MCINTOSH MR7082

[. . . ] IMPORTANT SAFETY INSTRUCTIONS THESE INSTRUCTIONS ARE TO PROTECT YOU AND THE MclNTOSH INSTRUMENT. Read all instructions - Read the safety and operating instructions before operating the instrument. Retain Instructions - Retain the safety and operating instructions for future reference. WARNING: TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS INSTRUMENT TO RAIN OR MOISTURE. [. . . ] The input connector is a "Type F" which mates with cable company feed lines and coaxial cable. Interference rejection and low signal loss are among the benefits of coaxial cable. Any one of four different FM antenna systems can be used with your MR 7082. 1) an outdoor FM antenna, 2) an all-channel (UHF-VHF-FM) antenna, 3) a cable input from your local cable company, or 4) the indoor dipole supplied. A 75-ohm outdoor antenna designed for FM reception is recommended for optimum performance in all areas. In fringe areas, best results will be obtained with a highly directional FM antenna used with a rotator. Adjust the position of the antenna until the best reception is obtained. A 75-ohm matched dipole antenna supplied with your MR 7082 may be used in urban or in high signal strength areas. The flexibility of the thin wire assembly permits it to be placed under a rug, tacked behind the stereo, or placed in any other convenient location. In some cases, it may be necessary to position the antenna for best signal reception. An indoor antenna may not 3. 6 HOW TO CONNECT prove effective in houses having metal siding or metal insulation. Although a 75-ohm coaxial feedline offers the best noise and multipath rejection, many antennas use 300-ohm twin lead. In this case, use a matching transformer (balum) to convert a 300-ohm antenna to the 75-ohm input impedance of the tuner. The plug blades are polarized so be certain the plug is fully inserted in the outlet to prevent blade exposure. CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT USE THE (POLARIZED) PLUG ON THIS UNIT WITH AN EXTENSION CORD, RECEPTACLE, OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE. Charging The Electronic Memory Battery Power Supply A very long life, rechargeable battery power supply provides the energy to the electronic memory when the tuner is turned off. When first connected, it is wise to assume that the batteries have not been charged. To bring the batteries to full charge, operate the tuner for twenty four continuous hours. After the batteries are fully charged, using the tuner for approximately one hour per week, will maintain the batteries in a fully charged state. When fully charged, the batteries will provide the energy to retain the programmed instructions for more than six months with the tuner turned off. Battery replacement should only be done at a Mclntosh authorized service agency. HOW TO CONNECT 7 75ohm ANTENNA TO MclNTOSH INFRARED REMOTE CONTROL PREAMPLIFIER AMPLIFIER MAIN AREA SPEAKERS 8 HOOK-UP DIAGRAM Fold out the photographs on the inside of the back cover. Before operating your MR 7082 FM/AM Tuner, familiarize yourself with the controls and what they do. [. . . ] This PLL IC incorporates two special systems, an automatic variable separation control circuit to reduce background noise when receiving a weak stereo station, and tri-level digital waveform generation which eliminates interference TECHNICAL DESCRIPTION 13 from SCA signals and from the sidebands of adjacent channel FM signals. The variable separation control is operated from the IF amplifier's signal strength detector. A smooth transition is provided from mono to stereo or from stereo to mono at weak signal levels to provide the optimum signal-to-noise ratio and best stereo separation for the prevailing signal conditions. It switches automatically to monophonic if the 19 kHz pilot tone is absent. [. . . ]