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MAN 062B - PPA SYS 500
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1. Set the Hi Pass Filter Switch The High Pass Filter switch is used to reduce low frequencies It is normally used in the middle 175 Hz position to provide high frequency emphasis that improves speech understanding for hard of hearing listeners If the program content is primarily musical it can be used in the left 20 Hz position The right position 725 Hz may be used for further low frequency reduction or it may be used to reduce low frequency system noise due to pick up of ventilation system noise etc Step 6 Step 7 Set the RF Power Switch In some situations the radio signal produced by the transmitter can enter other types of equipment and create a hum or buzzing sound in the sound system This is due to poor RF protection in the other equipment NOT a problem with the transmitter The normal switch position is MAX power right If you encounter a hum or buzz in the sound system when the T20 is turned on move the switch to the 6 dB middle position If the buzz diminishes but persists move the switch to the 12 dB left position If this does not solve the problem refer to the Troubleshooting Guide on page 16 However if the amount of buzz does not change when the RF power switch is moved from MAX to 12 dB the buzz is not related to RF interference from the T20 The system range is decreased when power is reduced but usually still covers the entire seating area Use a receiver to test t
2. Step 1 Step 2 Step 3 Install the antenna The rubber duck whip 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 If the optional remote antenna ANT 005 is more appropriate contact your dealer or Williams Sound Corp The remote antenna installation is detailed on page 15 Connect the Transmitter to Power The T20 is supplied with a wall transformer power supply TFP 016 Plug the power cord into the Power connector on the rear panel of the T20 Then plug the transformer into a 120 V 60 Hz wall outlet The indicator light on the front panel of the T20 should glow when the power is connected There is no ON OFF switch Due to low energy consumption the T20 is designed to run continuously The wall transformer can be plugged into a switched outlet that turns on when the other sound equipment is turned on If turning the T20 on creates a hum or buzz in the sound system see the Troubleshooting Guide on page 16 Make audio connections Step 3a If you will be using the T20 with an existing sound system Refer to the Overall System Diagram on page 4 The T20 has been designed to accept virtually any type of audio input with up to four different input signals actively mixed together The best sources f
3. 4 Od OF Cd NO O C CO Ny Od OF Gd DO CO CO CO Ny Od OF BY G9 PO OO CO CO 4 Gd O1 BS G9 NO O CO OO N O5 OF 4 Gd IO 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 6 1 o 18 vw Williams Sound Helping People Hear d The R19 R19 4 and R19 6 operate on fixed crystals Because of the nature of these crystals frequency tuning is highly stable over the life of the receiver Crystals are not tunable if alternate frequencies are needed return the receivers to your dealer for new crystals There are 10 standard frequencies available wv Williams Sound Helping People Hear Warranty The Williams Sound T20 Transmitter R19 R19 4 and R19 6 Receivers are warranted against defects in workmanship and materials for FIVE YEARS Microphones earphones cables carry cases rechargeable batteries and chargers are warranted against defects in workmanship and materials for NINETY DAYS This warranty does not extend to intentional or accidental physical damage This warranty applies only to products returned to Williams Sound for service To return a product for service call 1 800 843 3544 and request a Return Authorization RA number ad PPA T20 TRANSMITTER SPECIFICATIONS PERSONAL PA Transmitter Model T20 Dimensions Weight Color Rack Mount Power FCC ID Op
4. Williams Sound R19 receiver is designed to offer maximum sensitivity with minimum noise and a reasonable squelch action Overload Protection Making a receiver sensitive for greater reception of weak signals can create a problem when the receiver is used in an area that has strong radio signals Unless the receiver has a superior dynamic range it can be overloaded by the strong signal and become noisy distorted or vulnerable to interference The Williams Sound R19 receiver uses state of the art circuitry for improved RF dynamic range Capture Effect When an FM receiver is presented with two radio signals on the same channel it will lock on to whichever signal is stronger This is called the capture effect Because signal strength is related to distance this usually means that the closest transmitter antenna will produce the strongest signal and capture the receiver d Controls and Features Receiver Model R19 Transmitter Model T20 EAR Jack See Figures 3 and 4 Mono 3 5 mm mini earphone jack Off On Indicator Light Red LED which indicates receiver is on when lit If the batteries are near end of life and the LED turns off while the receiver is operating approximately one hour of battery life remains Tone Control 3 position switch which cuts low frequencies at certain thresholds Lo 20 Hz Mid 120 Hz Hi 700 Hz Volume On Off Control Combination volume and on off rotary control Channel Slide Sw
5. 600 mV 100 9 source impedance also drives mono or stereo headphone All inputs are actively mixed into a single signal allowing use of mono stereo 3 channel or 4 channel audio sources Combination 3 pin female XLR 1 4 stereo jack accepts balanced or unbalanced microphone and line level inputs 25 V or 70 V audio input Lo Z 100 uV min to 50 mV max 1 mV nominal 3 KQ input impedance Supplies simplex power 20 V DIN45596 for condenser mics 21 mV min to 10 V max 212 mV nominal 100 KQ input impedance 216 mV min to 100 V mox 2 16 V nominal 100 KQ input impedance Four screw terminals three unbalanced line level inputs one ground actively mixed 3 position slide type selects mic line 70 V on combination XLR Phone audio input jack 3 position slide type 20 Hz 175 Hz or 725 Hz 6 dB octave roll off 3 position slide type Full power 6dB 12dB Thread Mount for rubber duckie flexible whip antenna optional hard wired 75 Q Coaxial Antenna ANT 005 uses RG 59 cable 400 ft 140 m max cable length 3 pin Molex connector 2 rotary switches set the operating frequency CNMR19 Earbud type with foam cushion 3 5 mm plug mono 32 Q 3 5 mm mini phone jack mono Narrow band 5 kHz 300 uS 0 7 uV at 12 dB Sinad 4 uV for minimum 40 cB S N ratio 100 5 kHz 3 dB Tone Lo Integral with earphone cord 50dB 35 mW max at 16 Q Tone Lo 3 VDC Bat 125 dB Mox SSPL90 with EAR 013 Switched Low Cut Lo
6. 72 375 72 425 72 475 72 500 72 525 72 575 72 625 72 675 72 700 72 725 72 775 72 825 72 875 72 900 72 925 72 975 74 625 74 675 74 700 74 725 74 775 75 225 75 275 75 300 75 325 75 375 75 425 75 475 75 500 75 525 75 575 75 625 75 675 75 700 75 725 75 775 75 825 75 875 75 900 75 925 75 975 99 NA Note NA Not Available Step2 Change all Receiver frequencies to receiver channel 53 For the R19 move the slide switch on the control panel to channel 2 For the R19 4 and R19 6 turn the rotary switch on the control panel to channel 4 Transmitter Frequencies Channels are changed using the T20 s two rotary Channel selector switches One of the 10 standard narrow band channels must be selected for use with the R19 series Receivers The wide band channels are available for use with Williams Sound s line of wide band receivers including the R7 R7 4 R7 6 and R16 Receiver Frequencies The R19 has a slide switch to select from channels 1 or 2 channels 33 and 53 The R19 4 s rotary switch allows you to select between channels 1 4 channels 13 23 33 and 53 The R19 6 s rotary switch allows you to select between channels 1 6 channels 13 23 33 53 38 and 43 Make sure the transmitter frequency matches the receiver frequency C CE CO
7. may be preferred for musical programs but may provide too much dynamic range for hearing impaired listeners Hard Limit Mode Hard Limit Mode is useful if the T20 has been installed with external signal processing For assistance in selecting an alternate audio processing mode contact Williams Sound technical assistance at 1 800 328 6190 ad R19 R19 4 R19 6 Receivers Step 1 Install the batteries Pry open the battery compartment door with a coin Press the batteries into place observing proper battery polarity Do not force the batteries in backwards Step 2 Plug the earphone or headphone into the earphone jack Step 3 Turn the receiver on by turning the volume control clockwise Turning the knob clockwise will increase the volume Turning the knob counter clockwise will decrease the volume To avoid draining the battery make sure the receiver is turned off when not in use Step 4 If you are using the PPA System 500 with an existing sound system make sure the sound system is turned on Have someone speak into a microphone while you listen with the receiver and earphone You should be able to hear their voice through the receiver If you are using the PPA System 500 with its own microphone have someone speak into the microphone while you listen with the receiver and earphone You should be able to hear their voice through the receiver The T20 Transmitter has a screwdriver adjusted input level cont
8. 01 heavy duty AA alkaline batteries will last 90 100 hours If the sound becomes weak or distorted replace the battery The indicator light may still be on even with a battery that is weak Do not leave dead batteries in the receivers Rechargeable Batteries The receivers can also use a rechargeable batteries We recommend only the BAT 026 AA Ni Cad battery These batteries will last about 45 50 hrs per charge Batteries from other suppliers may provide shorter operating life wv Williams Sound Helping People Hear W Figure 8 Using The Optional CHG 200A Battery Charger Step 1 Plug the CHG 200 s power supply into the Power Jack on the back of the unit and a standard AC wall outlet Step 2 Wrap the power cord around the Cord Hook See figure at right This will minimize strain on the cord and jack and insure that the power cord is not detached during charging Make sure the receivers to be charged are turned OFF Place the receivers in the slots so that the CHG 200 s Charging Pins and receiver s side panel contacts are coupled Make sure that the charging contact holes line up with the charging pins The receivers should drop easily into the slots DO NOT FORCE THEM IN BACKWARDS The Charging Indicators will light indicating that charging is in process It takes about 14 hours to fully charge the batteries Remove the receivers when charging is completed Further Suggestions Receivers SHOULD N
9. 20 Hz Mid 120 Hz Hi 700 Hz Combination integral PPA R19 2 position slide switch PPA R19 4 4 position rotary switch PPA R19 6 6 position rotary switch Specific receiver model numbers contain a frequency code For example Model R19 33 53 is preset to channels 33 and 53 The R19 and R19 4 Receivers are crystal controlled for optimal stability If the standard R19 or R19 4 channels cannot be used the receiver must be returned to the factory for alternate crystals WV Williams Sound Corp 10399 West 70th St Eden Prairie MN 55344 3459 U S A 800 843 3544 952 943 2252 FAX 952 943 2174 1996 Williams Sound Corp MAN 062B
10. Freqs NOTE 2 Channel Pre Tuned Selectable CH 33 72 9 MHZ CH 53 75 7 MHz standard 10 Channels Available 72 1 75 9 MHz 4 Channel Pre Tuned Selectable CH 13 72 1 MHZ CH 23 72 5 MHZ CH 33 72 9 MHz CH 53 75 7 MHz 6 Channel Pre Tuned Selectable CH 13 72 1 MHz CH 23 72 5 MHZ CH 33 72 9 MHz CH 53 75 7 MHz CH 38 74 7 MHz CH 43 75 3 MHz 3 5 8 L x 2 3 8 W x 7 8 H 92 1 mm x 60 3 mm x 22 2 mm 3 2 oz 90 g with battery Neptune Blue 2 BAT 001 AA Alkaline or 2 BAT 026 Ni Cad 20 mA nominal 90 100 hrs with 2 AA Alkaline 45 50 hrs charge with BAT 026 Crystal controlled See factory for frequency changing instructions 10 7 MHz 455 kHz Audio Indicators Audio Level Control Tape Output Rear Panel Audio Inputs Balanced Audio Input Mic Input Levels Line Input Levels 70 Volt Input Levels Unbal Audio Inputs Input Selector Switch High Pass Filter Switch RF Output Switch Antenna Outputs Power Connections Channel Selector FCC ID Earphone Output Connector FM Deviation De Emphasis Sensitivity Squelch Level Frequency Response Receiver Antenna Signal to Noise Ratio Audio Output Acoustic Output CONTROLS Tone Volume amp On Off Channel Selector Amber LED Ok for nominal input signal level Red LED Hi for excessive input signal level Rotary pot screwdriver adjust used with audio indicator lights 1 4 jack
11. Mode See page 11 for details Sound through the receivers is weak and noisy l Turn the screwdriver adjust input level control located on the T20 front panel clockwise to increase the input signal strength until the audio indicator light flashes The audio fed into the T20 may be noisy or weak Use a headphone in the Phones jack on the front of the T20 to listen to the input signal If it is weak and noisy from the phones jack turn up the appropriate mixer control or try a different audio source wv Williams Sound Helping People Hear d 2 Increase the input signal level from the sound system by turning up a mixer control 3 Make sure a valid narrow band channel is selected and make sure the transmitter and receivers are tuned to the same channel Buzzing or humming noise in sound system 1 Most likely there is nothing wrong with the T20 transmitter One or more pieces of equipment in the sound system are being disturbed by RF Radio Frequency signals produced by the T20 The most likely suspects are your amplifier mixer or tape deck The RF gets into the other equipment primarily through the power cord speaker wires or unshielded inputs all of which can act as antennas Try moving the RF Power switch to the 6dB or 12dB position This will reduce the system range somewhat 2 If remedy 1 does not solve the problem we recommend using the optional Coax Antenna ANT 005 which should be loca
12. OT be left charging continuously when not in use Receivers should always be turned OFF while charging It s best to allow the batteries to fully discharge before charging If the batteries are near end of life and the LED turns off while the receiver is operating this is an indication to change or recharge your batteries Approximately one hour of battery life remains Repeatedly charging the batteries after short periods of use 1 2 hours will shorten battery life Rechargeable batteries will need to be replaced after 1 2 years of use wv Williams Sound Helping People Hear Charging Contact Holes Charging Indicators Charging Cord Hook Power Input I WARNING DO NOT ATTEMPT TO RECHARGE DISPOSABLE BATTERIES The batteries may heat up and burst causing possible injury and damage to the equipment terminals together with metal objects Battery damage and burns can result Use only Williams Sound supplied chargers and batteries d Suggestions For Receiver Management Different types of facilities will use different approaches for receiver management and earphone sanitation Below are some options that customers have used successfully 1 Regular users purchase their own receiver and take care of their own batteries and earphone 2 Some facilities label the receiver and earphone with the names of regular users so each person uses the same receiver and earphone 3 Ushers issue receivers t
13. W Installation Guide amp User Manual PERSONAL PA System 500 Narrow Band FM Wireless Listening System Transmitter Model T20 Y T T Receiver Model R19 R19 4A R19 6 f Williams Sound MAN 062B d PERSONAL PA SYSTEM 500 Installation and User Manual Contents Page Overview 4 Narrow Band Basics 5 Controls and Features 6 8 System Set Up and Operation Antenna Connection Power Connection Audio Connection Using a Microphone T20 Audio Processor Options Using R19 R19 4 R19 6 Receivers Adjusting Receiver Tone Controls Battery amp Charger Information Receiver Management Suggestions 14 Using a Remote Antenna 15 Troubleshooting Guide 16 Radio Interference Tuning Instructions 18 Warranty 19 System Specifications 20 Gl Williams Sound 3 Helping People Hear d Overview Thank you for purchasing the Personal PA System 500 from Williams Sound Corp The PPA System 500 is a Narrow Band FM Listening System which operates in the 72 76MHz frequency band Designed for hearing assistance in places of public access the PERSONAL PA System 500 is for those who need help overcoming background noise reverberation or distance from the sound source The versatile PPA 500 is easily integrated with your existing sound system or can be used with a microphone as a stand alone system Your PPA System 500 has two principal parts the T20 Transmitter and the R19 R19 4 or R19 6 Receivers Much like a miniature radi
14. ctive element last 80 inches inside a metal conduit The feedline is categorized as Class II wiring Thus it may be but is not required to be routed through metal conduit but NOT with microphone cables or AC power wiring Nylon clamps and screws are provided to attach the Coax Antenna to a wall Locate the clamps every 3 4 feet DO NOT bend the cable sharply at any point Allow at least a 3 radius for turns DO NOT staple the cable in place Use the cable clamps provided or hang the antenna from the excess nylon braid at the end of the antenna element ad Troubleshooting Guide For most efficient troubleshooting use high quality headphones to monitor the quality of the signal being fed into the T20 Plug them into the Tape Out Phones jack on the T20 Transmitter Power light not on 1 Make sure the wall transformer is plugged into the transmitter correctly 2 Make sure the electrical outlet is on No sound through receivers 1 Try switching to the other channel on the R19 2 If some of the receivers work but others don t check for bad batteries or earphones on the receivers that aren t working Check to see that those receivers frequencies match the transmitter frequency The R19 is preset for channels 33 and 53 3 If none of the receivers work check to see if the power is connected to the transmitter and the Power light is on Check to see if the transmitter and receivers are set on the same frequ
15. d Instead of dividing the Auditory Assistance Band 72 76MHz into 10 wide channels wide band the same band can be divided into 40 closely spaced narrow band channels The selectivity of the R19 dual conversion receiver allows you to operate on these closely spaced channels without interference from the next channel Greater Operating Range Another measure of FM receiver performance is sensitivity measured by the weakest radio signal that the receiver can respond to and still operate properly All hearing assistance transmitters are limited by FCC Rules to the same transmitted signal strength so you can t boost transmitter power or antenna efficiency to get more operating distance The farther you move from the transmitting antenna the weaker the signal becomes A very sensitive receiver like the R19 will allow greater operating distance Because of its excellent operating distance the PPA System 500 can be used in situations where maximum coverage area is needed Gl Williams Sound Helping People Hear Sound Quality Narrow band systems give up some frequency response extended highs and lows and noise performance compared to wide band systems This is usually not a drawback for spoken word presentations but may not be optimal for programs which are primarily music Manufacturers often list a minimum signal strength needed to maintain an acceptable noise level in the receiver before it squelches or goes quiet The
16. e 25 or 70 Volt Speaker Line wv Williams Sound Helping People Hear Te Shield Grounded To Amplifier Male XLR Connector To T20 Input 1 4in 2 Conductor Phone plug to T20 Input Male XLR Connector To T20 Input 1 4in 2 Conductor Phone plug to T20 Input 1 4in 2 Conductor Phone plug to T20 Input Male XLR Connector To T20 Input Male XLR Connector To T20 Input d Step 3b Step 4 Step 5 If the TAPE OUT jack is already in use a Y Cord can be used to connect the T20 and a second device to the same jack Unbalanced Audio Input Terminals Accepts one to three unbalanced line level signals which are actively mixed The three inputs share a common ground connection If you will be using the T20 with a microphone as a stand alone system Plug the microphone into the concentric jack Balanced Audio Input on the rear panel of the T20 The T20 supplies positive DC voltage to power condenser microphones per DIN45596 Standard dynamic microphones may also be used Make sure the input selector switch is in the MIC position Talking into the microphone should cause the audio indicator light to flash on the front panel If you use both the Microphone input and the Audio Input on the T20 the signals will be mixed Set the Input Selector Switch If you are using the combination XLR phone plug input jack make sure the selector switch is set in the proper position as shown in Figure 6
17. ency Look at the two channel switches on the T20 s rear panel checking the settings against the chart on top of the T20 The standard channels for the R19 are 33 and 53 4 Check to see if the Transmitter is connected properly to the sound system See page 8 5 Turn the screwdriver adjust input level control located on the T20 front panel clockwise to increase the input signal strength until the audio indicator light flashes 6 If you are not using an input signal from a sound system make sure the microphone is plugged into the Mic jack on the rear of the T20 transmitter and the input selector switch is in the MIC left position 7 Make sure the antenna is installed and connected properly See pages 8 or 15 Sound through receivers is excessively loud and is distorted 1 The T20 transmitter is probably set to a wide band channel Select a narrow band channel Sound is of normal volume HI audio light not continuously on but sound is distorted 1 The source audio might be distorted 2 Input select switch might be in wrong position Try other positions Too much noise when talking stops Normal sound compressed excessively Red HI light lit too frequently 1 Turn audio adjust counter clockwise Red HI light should blink only occasionally Audio OK light should be on when there is normal audio present 2 Consider changing the audio processor option The T20 is shipped in Compress
18. erating Freqs Stability Deviation Pre Emphasis RF Field Strength ominal Range AGC Options Signal to Noise Ratio Front Panel Power Indicator RF Indicators Frequency Response 8 45 21 5 cm W x 8 18 20 8 cm D x 1 72 4 4 cm H 3lbs 1 5 kg Black epoxy paint with white legends One IEC rack space high one or two units can be mounted in a single rack space with optional RPK 005 single or RPK 006 double Rack Mount Kits External power supply TFP 016 24 VAC 50 or 60 Hz 10 VA 230 mA max current drain CNMT20 72 76 MHz 10 wide band and 10 narrow band channels 005 stability 0 50 C x 75 kHz mox for wide band channels x 5 kHz max for narrow band channels Wide band 75 usec narrow band 300 usec 8000 uV m at 30 m max 20 mW typical 300 500 ft 90 150 m D standard variable slope compressor limiter 2 Noise Reduction 3 Soft Limit 4 Hard Limit WB 30 Hz 15 kHz 3 CB 25 Max THD NB 30 Hz 5 kHz 3 CB 25 Max THD 50 cB with PPA R19 Receiver Green LED Green LED On indicates transmitter RF is on Amber LED WB indicates wide band channel selected Amber LED NB indicates narrow band channel selected Recommended Receivers PERSONAL PA Receivers Model R19 Model R19 4 Model R19 6 Model PPA R19 Model PPA R19 4 Model PPA R19 6 Dimensions Weight Color Battery Type Battery Drain Battery Life Operating Freq Intermediate
19. he system and set the input level control wv Williams Sound Helping People Hear ad Figure 7 T20 Audio Processor Performance 10 PTT TTT Ben Compress Hard Limiter Always Functional ida m I m m A m m o m m FHEETTEETEEEEEEFEETEEETITTETTTT Noise Reduction TTT TTT TTT TTT TA TTT TT Hard Limit 7 m lt m o c vu c r m lt m rc Soft Limit LLLE tL Ebr rr nr na Lr ulii Audio OK Light ON M N Audio High Light ON LLLL LLLI LLLLT LLLI AIII 30 20 10 0 10 RELATIVE INPUT LEVEL Audio Processor Options The audio processor in the T20 is capable of four modes of operation The effects of these modes are charted in figure 7 Compressor Mode Compressor mode is used for hearing assistance to limit the dynamic range of the audio signals Hearing impaired people generally have a reduced tolerance for wide dynamic range The T20 is shipped in Compressor Mode Noise Reduction Mode The T20 can also be configured for for 2 1 compression This is for use only with a receiver that has a 2 1 expansion circuit for noise reduction Noise reduction is typically used in narrow band operation for high quality audio Gl Williams Sound Helping People Hear Soft Limit Mode The T20 can also operate in a soft limit mode which allows full dynamic range of audio signals This mode
20. itch 2 position slide switch used to alternate between two pre set narrow band frequencies Standard channels are 33 and 53 See page 18 for instruction on changing system frequencies Figure 2 R19 Receiver Controls EAR Jack Tone Control Volume On Off Control Mono 3 5 mm mini earphone jack Three position switch which cuts low Combination volume and on off rotary frequencies at certain thresholds control Volume Channel Channel Slide Switch 2 position slide switch used to alternate between two pre set narrow band frequencies Off On Indicator Light Red LED which indicates receiver is on when lit 6 x A Williams Sound Helping People Hear W Figure 3 T20 Front Panel Controls amp Features Audio Indicators Tape Out Phones Amber LED Ok for nominal input signal level jack 600 mV 100 Q source impedance Also drives Red LED Hi for excessive input signal level mono or stereo headphone Monitors exactly what is being transmitted Tere YL FM Au tory AssistanceTransmitter Williams Sgund v Power Audio Level Transmit Status I T 14 Q O O Q Tape Out Phones Hi Adjust Power Indicator Audio Level Control RF Indicators Green LED Rotary pot screwdriver adjust Green LED On indicates transmitter RF is on used with audio indicator lights Amber LED WB indicates wide band channel is selected Amber LED NB indicates narrow band channel is selected Figure 4 T20 Rear Panel Con
21. o people who request them Earphones are sanitized after use Foam ear cushions can be replaced or washed with a mild detergent rinsed thoroughly and air dried The EAR 022 Surround Earphone can be sanitized with an alcohol pad 4 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 14 wv Williams Sound Helping People Hear d Using A Remote Antenna The optional ANT 005 Coaxial Antenna is intended for use with rack mounted transmitters or in installation areas where a remote antenna 1s needed for maximum operating distance Per FCC Rules only antennas supplied by Williams Sound may be used with this transmitter Do not cut or alter the antenna cable before reading the instructions below The ANT 005 Coaxial Antenna is a length of coaxial cable with an F connector on one end and an 80 inch antenna built onto the other end The last 80 inches of the antenna make up the active element which is covered by nylon braid The active element should never be altered The remainder of the antenna cable is RG 59 coax feedline The feedline can be shortened if you have the tools to install a new F connector If you need a longer feedline extension cables are available from Williams Sound in 50 foot lengths WCA 008 50 Never splice coax cables together Always use proper connectors Installing The Remote Antenna Step 1 Remove the r
22. o station the transmitter and microphone pick up the sounds you want to hear and broadcast them over an FM radio signal The receivers are used to pick up the broadcast up to 500 feet away Figure 1 Overall System Diagram To avoid difficulties please read through this manual as you begin to use the system Then save it for questions that arise as you continue to use your PERSONAL PA System 500 If you have any problems with this Williams Sound product don t hesitate to call us toll free at 1 800 843 3544 Microphones Sound System Amplifier 00000 Line Level Output easel BL Auction Asstoncorronsmior Line Level Input 62 R19 R19 A R19 6 Narrow Band Receivers w Earphones T20 Transmitter wv Williams Sound Helping People Hear d Narrow Band Basics Less Interference All FM receivers are tuned to a specific carrier frequency The selectivity of the receiver determines how close nearby radio signals can be to this carrier frequency before interference occurs True narrow band receivers like the Williams Sound R19 use dual conversion circuitry to achieve a very narrow window of acceptance for radio signals This allows them to operate in areas that have a lot of different radio signals with less likelihood of receiving interference More Simultaneous Channels This narrow window of acceptance means more channels can be squeezed into the designated frequency ban
23. or audio signal from sound system are as follows Ist Choice TAPE OUT or LINE OUT 2nd Choice BOOSTER or BRIDGING 3rd Choice Speaker Terminal or Speaker Transformer tap Input connection options for the T20 transmitter are as follows Balanced Audio Input Concentric Jack 1 Accepts balanced and unbalanced XLR or TRS 1 4 Mic Level or Line Level Inputs 2 Accepts balanced and unbalanced Mic Level or Line Level Inputs 3 Accepts balanced and unbalanced Speaker Level Inputs 25V 70V speaker line See Figure 6 for connection details Use the audio cable and adaptor supplied to connect the T20 Audio In jack to an appropriate audio output jack on the sound system mixer or amplifier See Figure 4 If your amplifier or mixer does not have RCA type connectors you can obtain adaptors from your Authorized Williams Sound Dealer or a local radio parts store Figure 5 Using The Audio Cable Supplied With The System From Sound System Line Output rj RCA to RCA Cable To T20 Concentric Jack TD RCA to 1 4 Adapter wv Williams Sound Helping People Hear W Figure 6 Audio Connection Wiring Detail Dynamic Low Impedance Balanced Mic Simplex Powered Condenser Mic or Dynamic Mic Unbalanced Dynamic Mic Battery Powered Condenser Mic Balanced Line Balanced Line Unbalanced Line 4 8 Or 16 Ohm Speaker Lin
24. rol located on the front panel to compensate for different input signal levels Adjust the control so the OK audio light flashes with the signal It s alright if the HI light comes on occasionally Reduce the signal level by turning the control counter clockwise if the HI light is on all the time Step 5 If the OK light does not come on at all turn the T20 input level control clockwise to increase the signal If the input level control is fully clockwise and the OK light still does not come on you will need to increase the signal level at its source mixer or P A amplifier Note The earphone cord is the receiving antenna Do not bunch up the cord wrap it around the receiver or place the receiver in a shirt pocket The cord should hang as straight as possible Step 6 If you don t hear the signal in the receiver try moving the R19 channel selector switch to the other channel The R19 4 features a four channel selector knob preset to channels 13 23 33 and 53 R19 6 features a six channel selector knob preset to channels 13 23 33 38 43 and 53 Turn the selector knob until you hear the desired program Adjusting The Receiver Tone Controls The R19 R19 4 and R19 6 allow adjustments to cut low frequency sounds Use the three position slide switch on the receiver control panel to make this adjustment Battery amp Charger Information Alkaline Batteries In normal use two BAT 0
25. ted 15 20 feet away from the other sound equipment You may add additional RG 59 feedline as needed 4 If changing to the Coax Antenna doesn t help it s time to dig deeper into the problem This involves a slight modification to the equipment causing the problem Unless you have the necessary technical skills this is best left to a qualified electronics repair technician Call your Authorized Dealer or Williams Sound Corporation for more information Ask for the Buzz Paper wv Williams Sound 17 Helping People Hear d Tuning Instructions Figure 9 T20 Channel Selection Wide Band Channels The PERSONAL PA System 500 is usually not 1st Digit 2nd Digit Freq MHz disturbed by other radio services However there are NA no clear or exclusive channels for this radio service 75 100 One of the unique features of the PPA System 500 is 72 500 that the operating frequency can easily be changed x to an alternate channel in the field to avoid interference gt 75 500 75 700 75 900 74 700 75 300 2 ooooj jo joo oo ojo o N oy A om Ao c TIgOommoou z Basic Frequency Change Procedure Step 1 If you are experiencing interference on channel 33 try channel 53 as your first alternate Set the T20 s channel selector switches to channel 53 See Figure 9 Narrow Band Channels 1st Digit 2nd Digit Freq MHz 72 025 72 075 72 100 72 125 72 175 72 225 72 275 72 300 72 325
26. trols amp Features Audio Inputs Unbal Audio Inputs Remote Antenna Output All inputs are actively mixed into a single Four screw terminals three unbalanced F type connector for 75 Q Coaxial signal allowing use of mono stereo line level inputs Antenna ANT 005 uses RG 59 cable 3 channel or 4 channel audio sources one ground actively mixed Balancea Audio Input COM IN IN2 FM A r vV uditory AssistanceTransmitter l Unbalanced Antenna O Audio Inputs 75Ohm Channel Hi Pass Filter Mower QE V EHE OVA Use with TFP 016 70v 20Hz 725Hz m 1 OOO _ Powersupply 175 Hz 12dB dB Max Made in U Williams Sound Corp Balanced Audio Input High Pass Filter Switch RF Output Switch Power Combination 3 pin female 3 position slide type 3 position slide type Connection XLR 1 4 stereo jack accepts 20 Hz 175 Hz or 725 Hz Full power 6 dB 12 dB 3 pin Molex balanced or unbalanced microphone 6 dB octave roll off connector for TFP and line level inputs 25 V or 70 V 016 power supply audio input Input Selector Switch Channel Selector 3 position slide type selects mic line 70 V 2 rotary switches set the operating on combination XLR Phone audio input frequency jack wv Williams Sound 7 Helping People Hear ad Set up amp Operation T20 Transmitter
27. ubber duckie antenna from the T20 s top panel by turning it COUNTER CLOCKWISE Step 2 Use a pliers to remove the cap on the connector Be sure to turn COUNTER CLOCKWISE to remove the cap The ANT 005 Coaxial Antenna connects to the Antenna connector on the rear panel of the T20 Transmitter To attach the cable making sure the center wire on the cable enters the hole in the center of the receptacle The connectors screw together and need only be finger tight Step 3 Gl Williams Sound Helping People Hear Remote Antenna Location Guidelines For maximum signal strength it is best to select an antenna location somewhere within the listening area The preferred location is towards the front of the listening area and above the seats The active element nylon braid covered portion should be kept straight not coiled and must be vertical Radio signals will generally pass through non metal structures The antenna can be mounted on a wall in a corner or behind a wooden beam It may also be hung vertically from the ceiling with a small weight attached to the end to make it hang freely If you need to run the feedline through a wall a 1 2 hole is necessary to pass the connector through Avoid placing the antenna within four feet of steel beams or near structural steel elements Metal studs ductwork and foil backed insulation can absorb radio energy greatly reducing the range of the system DO NOT put the a
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