Related Manuals for Williams Sound PPA 275
Summary of Contents for Williams Sound PPA 275
- Page 1 Installation Guide & User Manual PERSONAL PA ® Pro Wide–band System 275 Wireless FM Listening System Transmitter Model T4 ® Williams Sound Receiver Model R30 Helping People Hear MAN 103 A...
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Page 3: Table Of Contents
– PPA 275 BAND YSTEM ODEL & U NSTALLATION UIDE ANUAL Contents Page FAST SET-UP PROCEDURE YSTEM VERVIEW ONTROLS AND ONNECTORS ETAILED ROCEDURE OUNTING THE RANSMITTER NSTALLING THE NTENNA HOOSING A HANNEL HOOSING AND ONNECTING AN UDIO OURCE HOOSING AN... - Page 4 IMPORTANT: If you choose to connect to 70 Volt Speaker line, be certain to set the Audio Config switch correctly. Transmitter damage will occur if you do not. ® Williams Sound Helping People Hear...
- Page 5 Set the Audio Select DIP Switches Set the Audio Select switch for the type of source you’re using. If you have used the audio cable provided with the PPA 275, there is no need to change the factory set configuration.
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Page 6: System Overview
Your PPA 275 has two principle parts: the T4 Transmitter and the R30 Receivers. Much like a miniature radio station, the transmitter and microphone pick up the sounds you want to hear and broadcast them over an FM radio signal. - Page 7 Can be used for monitoring, recording, or as a feed for other equipment. Audio Input Model PPA T4 Auditory Assistance FM Transmitter Williams Sound Corp., Minneapolis, MN USA (XLR) Bal. Mic Bal./Unbal line or 70V Antenna Line Out FM Channel,...
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Page 8: Controls And Connectors
– 3 dB AT 730 Hz AUDIO INPUT 3 PIN TRS PHONE BAL/UNBAL LINE OFF OFF See page 13 for plug wiring diagrams. MIC W/SIMPLEX BAL/UNBAL LINE BAL/UNBAL LINE BAL/UNBAL LINE OFF OFF BAL/UNBAL 70 V BAL/UNBAL 70 V ® Williams Sound Helping People Hear... - Page 9 Normally, one of these would be connected to the common output terminal of the power amplifier connected to the speaker line. But in most installations, there cannot be an external connection from the common terminal of a power amplifier to ground. To avoid this ® Williams Sound Helping People Hear...
- Page 10 RF in some audio equipment. Williams Sound offers a document (Technical Bulletin: Buzz Or Hum In The Sound System, FRM 531) giving suggestions for improving RF immunity in existing audio equipment.
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Page 11: Detailed Setup Procedure
NGINEERED NSTALLATIONS The transmitter can be mounted in an equipment rack. Use a Williams Sound rack mount kit (RPK 005 or RPK 006). Make sure there is good electrical contact between the transmitter chassis and the rack cabinet. -
Page 12: Channel
Try retuning if the problem remains. 5: U IGURE SING UDIO ABLE UPPLIED NBALANCED ONNECTIONS From Sound System To T4 Audio Input Amplifier's Line Output RCA to RCA Cable RCA to 1/4" Adapter ® Williams Sound Helping People Hear... - Page 13 Figure 3 and 6) and plug in a suitable audio cable. If those jacks are already in use, a simple “Y cord” can easily make the connection. See Figure 5, page 12 for use of the PPA 275’s audio cable.
- Page 14 The audio should not be subject to a compressor, limiter, or other signal processing equipment. The transmitter has an effective audio processor. Additional compression is ® Williams Sound Helping People Hear...
- Page 15 8: T4 A IGURE UDIO ROCESSOR ERFORMANCE Hard Limiter (Always Functional) Compress –10 –20 Limit –30 Audio "-12 dB" Light ON Audio "0 dB" Light ON –40 –40 –30 –20 –10 RELATIVE INPUT LEVEL ® Williams Sound Helping People Hear...
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Page 16: Power
Play a compact disc or other quality audio source through the complete sound system at a level that is typical of normal operation. Adjust the Audio Input control so that the Level Indicator 0 dB LED generally lights and the +6 dB LED lights occasionally. ® Williams Sound Helping People Hear... -
Page 17: Assuring Excellent Performance
XCELLENT ERFORMANCE The PPA 275 consists of a transmitter and several receivers used to deliver an audio signal to listeners who are hard of hearing. The audio signal is usually provided by equipment manufactured and installed by others. The PPA 275 provides excellent audio performance under most conditions. -
Page 18: Receiver Use Instructions
If you’re using the PPA 275 with an existing sound system, make sure the sound system is turned on. Have someone speak into a sound system microphone while you listen with the receiver and earphone. - Page 19 (i.e., Neckloop) and personal hearing aid. SING ECEIVER EARING Williams Sound PPA Receivers can be used with hearing aids using three different methods: ECKLOOP ELECOIL OUPLER Neckloops are cords which hang around the neck and couple magnetically with T-Coil equipped hearing aids.
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Page 20: Battery Information
Nickel Cadmium batteries, and only if the correct Williams Sound charger is used. Recharge batteries only with a Williams Sound CHG 200A 3V Dual Multi Charger or the CHG 1600 Multiple Battery Charger. Make sure the receiver is turned off during charging. A complete recharge cycle takes about 14 hours. - Page 21 HANGE NSTRUCTIONS Normally, the PPA 275’s factory-set channel (usually 72.9 MHz) requires no change. However, if another hearing assistance system or authorized radio service is operating on 72.9 MHz in your area, it may prove necessary to use an alternate channel.
- Page 22 R7- 4 R7- 6 Most Williams Sound single channel Receivers are set at the factory to 72.9 MHz. The standard four-channel receivers (R7-4NA), Channels 1-4, are usually set to frequencies 72.1, 72.5, 72.9, 75.7 MHz respectively. The standard six-channel receivers (R7-6N), channels 1- 6, are set to frequencies 72.1, 72.5, 72.9, 75.7, 74.7 and 75.3 MHz respectively.
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Page 23: Suggestions For Receiverm
The receivers can be stored in a multiple compartment storage case with a credit card or driver’s license left as collateral for the receiver. Regular users purchase their own earphone or headphone and bring them to use with receivers at the facility. ® Williams Sound Helping People Hear... -
Page 24: Troubleshooting Guide
OISE IN AUDIO GROWS WHEN PROGRAM IS SILENT The Audio Level control is set too high. You’re probably also seeing the +6 level indicator lighting all the time. To correct, adjust the Audio Level control. ® Williams Sound Helping People Hear... - Page 25 Perhaps there is a strong interfering signal. If so, make sure the transmitter and antenna are correctly installed. Set the transmitter to FULL power output. If this does not solve the problem, change the PPA 275’s frequency by setting the FM Channel/FM Power Switch according to the instructions on page 21.
- Page 26 Williams Sound Narrow Band FM or Williams Sound Infrared. SERS MUST TURN RECEIVER VOLUME CONTROLS WAY UP TO GET ENOUGH VOLUME Perhaps there is insufficient audio level. If so, the audio level indicator will read too low because the audio level is set incorrectly on the transmitter.
- Page 27 If you experience difficulty with your system, call for Customer Assistance: 1-800-328-6190. If it is necessary to return the system for service, a Williams Sound representative will give you a Return Authorization Number (RA) and shipping instructions. Pack the system carefully and send it to: Williams Sound Corp.
- Page 28 Pro Wide–band System, Model PPA 275 SPECIFICATIONS PERSONAL PA Transmitter Model T4 Dimensions, Weight: 8.45" (21.5 cm) W x 8.18" (20.8 cm) D Frequency Accuracy: ±.005% stability, 0-50˚ C x 1.72" (4.4 cm) H, 3lbs. (1.5 kg) Deviation: ± 75 kHz maximum...
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