Install Instructions - Williams Sound

Frequency Synthesized, Channel-SelectableDecreaseIncreaseLoOkOk Too HiSYSTEM OVERVIEWThe PPA 250 is a Wide-band FM Listening System which operates in the 72–76 MHzfrequency band.Developed for hearing assistance in places of public access, the PPA 250 is designed forthose who need help overcoming background noise, reverberation, or distance from thesound source. It includes a complete audio processor optimized for the needs of hearingimpaired persons and is easily integrated with your existing sound system. The PPA 250 canalso be used with a microphone as a stand-alone system.Your PPA 250 has two principal parts: the T4 Transmitter and the R7 Receivers. Much like aminiature radio station, the transmitter and microphone pick up the sounds you want to hearand broadcast them over an FM radio signal. The receivers pick up the broadcast up to 500feet away.Listeners may sit anywhere and can make the audio signal as loud as they wish withoutcausing PA system feedback or disturbing others.To avoid difficulties, read through this manual as you begin to use the system. Then save itfor questions that arise as you continue to use your PPA system.If you have any problems with this Williams Sound product, don’t hesitate to call us toll-freeat 1-800-843-3544.FIGURE 1: OVERALL SYSTEM DIAGRAMMicrophonesLoudspeakersLine-LevelOutputSound System AmplifierLine-LevelInputPPA T4 Professional FM Auditory Assistance TransmitterAudio AdjustAudio LevelPower -12dB -6dB 0dB +6dBRF CarrierWilliams SoundT4 TransmitterPhonesR7 / R7-4 Receiversw/Earphones6Williams Sound ®Helping People Hear