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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 Listening

TM

Summary of Contents for ALT72

Page 1: ... 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 ...

Page 2: ...uick 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...

Page 3: ...em is grounded so as to provide some protection against voltage surges and built up static charges Article 810 of the National Electrical Code ANSI NFPA 70 provides information with regard to proper grounding of the mast and supporting structure grounding of the lead in wire to an antenna discharge unit size of grounding conductors location of antenna discharge unit connection to grounding electro...

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Page 5: ...ed with the system are 3 three ALT 72 Assistive Listening System decals These decals can be posted to inform people that a facility is equipped with the AudioAccentTM Assistive Listening System Caution Statements Important Safeguards Table of Contents Specifications Options and Accessories Introduction General Description Front Panel Controls and Indicators Rear Panel Controls and Connections Inst...

Page 6: ...ce unbalanced 16 to 4 dBu manual gain adjustment with front panel modulation indicator 20 Hz to 15 kHz 1 dB referenced to a standard 75 µSec pre emphasis curve Greater than 60 dB monaural Less than 0 25 typical 12 VDC 200 mA regulated by supplied wall AC Adapter Flexible 7 inch length whip 7 25 18 4 cm W x 1 6 4 1 cm H x 5 0 12 7 cm D with antenna removed 1 9 lbs 0 85 Kg FCC Part 15 Certification ...

Page 7: ...nnector for unbalanced audio input The transmitter shall provide a GROUND LIFT switch for the XLR input The transmitter shall permit switch selection of no limiting limiting only or limiting and compression operation from a front panel switch There shall be a front panel control to adjust the audio input level with an LED MODULATION indicator Sound System Amplifier Microphones wired or wireless ty...

Page 8: ...bursts and to avoid over modulation conditions which can cause distorted audio at the receiver With the audio source connected for example the output of a public address amplifier with a person speaking at a normal level into the microphone adjust the INPUT LEVEL control to a setting at the point where the MODULATION indicator lights on audio peaks C L For audio sources that contain relatively low...

Page 9: ...T 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 5 GROUND LIFT When switched ON this switch lifts or isolates the shield connection pin 1 of the XLR connector In some installa...

Page 10: ...e force to tighten the antenna it only needs to be finger tight If the optional magnetic mount antenna is more appropriate contact your dealer or the R L Drake Company The magnetic mount antenna installation and placement is detailed on page 5 of this manual 2 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 TA...

Page 11: ... INPUT LEVEL control clockwise until the MODULATION LED indicator just begins to light on audio signal peaks Refer to the Front Panel Controls and Indicators section of this manual for details AC Adapter Locating the Optional Magnetic Mount Antenna The optional magnetic mount antenna is intended for use with rack mounted transmitters or in installation areas where a remote antenna is needed for ma...

Page 12: ...t the desired frequency 5 Adjust the volume control 3 to the desired level 6 Set the FM MONO Stereo switch 4 to the MONO position POWER SUPPLY Slide open the battery compartment cover 14 on the back of the unit and insert two AAA RO3 UM4 dry cells Make sure the and markings on the batteries match the markings inside the compartment Do not mix old and new batteries Do not mix alkaline standard carb...

Page 13: ...approaches for receiver management and earphone sanitation The following includes some options that customers have used successfully 1 Regular users purchase their own receiver and maintain the batteries and earphone 2 Some facilities label each receiver and earphone with the name of the person to which the receiver earphone is assigned and used 3 Ushers issue receivers to those people who request...

Page 14: ...he facts If we must call you it may take longer R L DRAKE is not responsible for damage caused by lightning nonprofes sional alterations acts of God shipping damage poor storage handling etc R L DRAKE will make note of any shipping damage upon receipt Should your warranty card not be on file at R L DRAKE you will need to send proof of purchase to receive warranty service Typically a copy of the in...

Page 15: ...rmance from this product Therefore carefully read the Instruction Manual This warranty does not apply to any defect that R L DRAKE COMPANY determines is due to 1 1 1 1 1 Improper maintenance or repair including the installation of parts or accessories that do not conform to the quality and specifications of the original parts 2 2 2 2 2 Misuse abuse neglect or improper installation 3 3 3 3 3 Accide...

Page 16: ... 743 4576 WORLD WIDE WEB SITE http www rldrake com is a registered trademark of the R L Drake Company Copyright 2002 R L Drake Co P N 3852429D 3 2002 Printed in the U S A NOTE Soon our area code will change from 513 to 937 If problems are experienced when dialing us please try the 937 area code We look forward to serving you soon ...

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