Williams Sound R7-4 Installation Guide Page 1

Williams Sound ® Helping People HearPERSONAL PA®Pro Wide–band System 250Wireless FM Listening SystemTransmitter Model T4Receiver Models R7, R7–4Ins

Williams Sound ® Helping People Hear11DETAILED SETUP PROCEDURESTEP 1: CHOOSE A LOCATION AND INSTALL THE TRANSMITTERIt’s usually most convenient to

Williams Sound ® Helping People Hear12AVOIDING UNDESIRABLE ANTENNA INSTALLATIONSTransmission (range, directional properties) can be severely impaire

In PhaseBalanced Line Using 1/4' ConnectorUnbalanced Line Using 1/4" Connector4.7 K4.7 KSource ASource BConnecting To A Stereo SourceSTEP 4:

Williams Sound ® Helping People Hear142 TO 16 Ω OR 70 V SPEAKER LINEThe T4 input can also be connected directly to 2 to 16 Ω or 70 Volt speaker line

Williams Sound ® Helping People Hear15not helpful to the hearing impaired and can contribute to excessive noise in the receiveroutputs. See the sec

Williams Sound ® Helping People Hear16STEP 5: CONNECT THE POWER SUPPLYThe T4 transmitter is powered by a wall mounted transformer supplying 24 VAC.

Williams Sound ® Helping People Hear17ASSURING EXCELLENT PERFORMANCEThe PPA 250 consists of a transmitter and several receivers used to deliver an

Williams Sound ® Helping People Hear18RECEIVER USE INSTRUCTIONSRECEIVER MODEL PPA R7Receiver Model PPA R7 has a single, wheel-type volume control an

Williams Sound ® Helping People Hear19shorter knob controls the microphone signal level. By adjusting the two volume controls, youcan hear a mixtur

Williams Sound ® Helping People Hear20BATTERY INFORMATIONDISPOSABLE BATTERIESIn normal use, a heavy-duty 9 Volt battery such as the Eveready 216 wil

PRO WIDE–BAND SYSTEM, MODEL PPA 250INSTALLATION GUIDE & USER MANUALContents PageFAST SET-UP PROCEDURE 4SYSTEM OVERVIEW 6CONTROLS AND CONNECTORS 8D

Williams Sound ® Helping People Hear21FREQUENCY CHANGE INSTRUCTIONSNormally, the PPA 250’s factory-set channel (usually 72.9 MHz) requires no chang

Williams Sound ® Helping People Hear22RECEIVER FREQUENCY CHANGE INSTRUCTIONSTuning for the R7 and R-16 Receivers is determined by a single tuning co

Williams Sound ® Helping People Hear23SUGGESTIONS FOR RECEIVER MANAGEMENTDifferent types of facilities use varying approaches to receiver managemen

Williams Sound ® Helping People Hear24TROUBLE SHOOTING GUIDENO TRANSMITTER OPERATIONPOWER LIGHT NOT ONMost likely, there is no power. Make sure the

Williams Sound ® Helping People Hear25NOISE IN AUDIO “GROWS” WHEN PROGRAM IS SILENTThe Audio Level control is set too high. You’re probably also se

Williams Sound ® Helping People Hear26Check to see if there is a strong interfering signal by listening to the receiver with thetransmitter turned o

Williams Sound ® Helping People Hear27audio equipment may offer application notes for this purpose.Williams Sound offers a document giving suggest

Your Authorized Williams Sound Dealer Is:Williams Sound Corp.10399 West 70th St., Eden Prairie, MN 55344-3459U.S.A. 800-328-6190 / 952-943-2252 / FAX

Williams Sound ® Helping People Hear4FAST SETUP PROCEDUREStep 1 Choose a Location for the TransmitterIt’s usually most convenient to locate the T4 n

Williams Sound ® Helping People Hear5Step 5 Set the Audio Select DIP SwitchesSet the Audio Select switch for the type of source you’re using.If you

Williams Sound ® Helping People Hear6SYSTEM OVERVIEWThe PPA 250 is a Wide-band FM Listening System which operates in the 72–76 MHzfrequency band.Dev

Williams Sound ® Helping People Hear7Phones PPA T4 Professional FM Auditory Assistance TransmitterWilliams Sound Power-12dB -6dB 0dB +6dBAudio Leve

Williams Sound ® Helping People Hear8CONTROLS AND CONNECTORSFRONT PANELPOWER INDICATORIndicates that the transmitter has power available and that th

Williams Sound ® Helping People Hear9INPUTThe input can be configured to accept three types of signal sources: Balanced or UnbalancedMicrophone, Ba

Williams Sound ® Helping People Hear10unacceptable situation, use a connection scheme like those described in the section AvoidingGround Loops.Set t