User manual DRAKE DIGITAL ALT72

[. . . ] ® ALT 72 Assistive Listening System Contains an ALT 72 Assistive Listening Transmitter and 2 Model MR306 FM Receivers Instruction Manual Creating Sound Solutions for Easy ListeningTM ii Caution Statements WARNING: TO PREVENT FIRE OR ELECTRICAL SHOCK DO NOT EXPOSE TO RAIN OR MOISTURE A product and cart combination should be moved with care. Quick stops, excessive force and uneven surfaces may cause the product and cart combination to overturn. The lightning flash with arrow head symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER NO USER-SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE. [. . . ] This connector permits fitting only the R. Drake Company supplied remote magnet mount antenna. AUDIO INPUT - Connect audio to the appropriate input. The unbalanced phono style input and the XLR balanced input are each always active, so audio will be fed from whichever input is being used. Do not attempt to use both inputs at once. All inputs can be considered high impedance ( > 20K Ohm). GROUND LIFT - When switched "ON" this switch lifts or isolates the shield connection (pin 1) of the XLR connector. In some installations where excessive ground currents are present on the balanced line shield, turning the ground lift "ON" may help. For other conditions it should be set to the "OFF" position. This switch does not affect the unbalanced input. 4 Installation If the optional magnetic-mount antenna is more appropriate, contact your dealer or the R. L. The magnetic-mount antenna installation and placement is detailed on page 5 of this manual. Make audio connections The ALT 72 will accept line level audio inputs. The best sources for a signal from a sound system are as follows: 1. Speaker Transformer tap Use XLR connectors to connect balanced audio signals to the ALT 72 AUDIO INPUT. Use RCA phono connectors to connect unbalanced audio signals to the ALT 72 AUDIO INPUT. The following diagrams illustrate balanced and unbalanced audio wiring details: SETUP and OPERATION Locating the ALT 72 Prior to connection and adjustments, decide on a location for the ALT 72 that will provide a reliable signal to the receivers throughout the intended listening area. Generally, for the best transmitted signal coverage, locate the ALT 72 in an area that is free of metal obstructions and closest to the intended listening area. If the supplied "rubber duck" antenna is to be used, do not locate the ALT 72 in a metal cabinet. Install the antenna The "rubber duck" antenna fits into the hole on top of the transmitter and threads onto a mounting stud inside. Guide the antenna onto the stud and turn it clockwise to tighten. Do not use excessive force to tighten the antenna; it only needs to be finger-tight. Tighten - OR Male XLR Connector To ALT 72 Input Balanced Line Shield Grounded As Required RCA Phono Connector To ALT 72 Input Unbalanced Line *Do not use both inputs at once. + 2 1 3 Installation, continued AC Adapter 5 Switch to 'ON' 3. Connect the Transmitter to Power Plug the DC power cord of the supplied AC Adapter into the DC INPUT connector on the rear panel of the ALT 72 unit. [. . . ] DRAKE COMPANY may replace a defective unit. To obtain such a warranty service, the original purchaser must: (1) Retain invoice or original proof of purchase to establish the start of the warranty period. DRAKE COMPANY or the nearest authorized service facility, as soon as possible after discovery of a possible defect, of: (a) the model and serial number, (b) the identity of the seller and the approximate date of purchase; and (c) A detailed description of the problem, including details on the electrical connection to associated equipment and the list of such equipment. DRAKE COMPANY or the nearest authorized service facility, or ship the same in its original container or equivalent, fully insured and shipping charges prepaid. [. . . ]