Installation Guide & User Manual
Contents
1. 1 Open the back of the receiver case by opening the battery compartment Keep lifting on the battery door and the back of the receiver case will open like a book 2 Remove the screw from the center of the volume control and remove the knob 3 Lift the clear plastic cover on the control and spray GC SPRA KLEEN LPS Contact Cleaner or equivalent into the control Replace the knob and rotate the control several times 4 Replace the screw and close the case x A Williams Sound Helping People Hear Buzzing or humming noise in sound system 1 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 6 dB or 12 dB position This will reduce the system range somewhat If remedy one does not solve the problem we recommend using the optional Coax Antenna ANT 005 which should be located 15 20 feet away from the other sound equipment You may add additional RG 59 feedline as needed 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 t2. In normal use a heavy duty 9 Volt battery such as the Eveready 216 will last about 10 hours Alkaline batteries such as the Eveready 522 will provide about 17 hours of use 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 battery We recommend only 7 cell 8 4 Volt types BAT 003 Most batteries available through department and radio stores are 6 cell 7 2 Volt types They will not perform satisfactorily with Williams Sound receivers and may be damaged by the Williams Sound BAT 005 Charger A fully charged battery BAT 003 will provide about 5 hours of use per charge The battery may be recharged without removing it from the receiver The BAT 005 Single Charger has a cord that plugs into the receiver EAR jack to charge the battery The CHG 1269A Multiple Charger can charge 12 receivers simultaneously through the receiver EAR jacks Receivers can be left charging continuously when not in use The receiver should always be turned OFF while charging It takes about 14 hours to fully charge the battery I WARNING DO NOT ATTEMPT TO RECHARGE DISPOSABLE BATTERIES The batteries may heat up and burst causing possible injury and damage to the equipment Avoid shorting the plus and minus battery terminals together with metal
3. Pass Filter RF Power Power 24 VAC 60 Hz 10VA Use with TFP 016 70V 20Hz 725 Hz Z T O A O O Power Supply 175 Hz 12daB_ dB Max Made in U A 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 X A Williams Sound Helping People Hear F A Step 3 Step 3a 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 12 Make audio connections 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 for audio signal from sound system are as follows Is
4. V max 212 mV nominal 100 KQ input impedance 216 mV min to 100 V max 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 6 AB 12 dB 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 2 uV at 12 dB Sinad with squelch defeated Squelches at 10 uV for minimum 50 cB S N ratio 20 mV 100 10 kHz 3 dB 50 cB at 10 uV Integral with earohone headphone cord 250 mW max at 16 Ohms 3 5 mm mini phone jack also serves as a charging jack for rechargeable battery Earbud type with foam cushion 3 5 mm plug 32 Q 2001 Williams Sound Corp MAN 050B
5. is installed and connected properly See pages 4 or 11 x A Williams Sound Helping People Hear F A 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 Mode See page 9 for details Sound through the receivers is weak and noisy 1 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 2 Increase the input signal level from the sound system by turning up a mixer control 3 Make sure a valid wide band channel is selected and make sure the transmitter and receivers are tuned to the same channel Scratchy noise when receiver volume control is adjusted
6. Audio Processor Performance 10 PTT TTT BEET REE PUTT TTT PTTTY TTT TP TTT ry tr try tri tyr Hard Limiter Always Functional ag Compress Noise Reduction Hard Limit IITTJETT TTE TTT A m gt Z m O Cc pe Cc m m lt m r Lotte Soft Limit Audio OK Light ON ye Audio High Light ON ni iie ee de ea 30 20 10 0 10 RELATIVE INPUT LEVEL Step 5 Set the Hi Pass Filter Switch other equipment NOT a problem with the The High Pass Filter switch is used to Heap et reduce low frequencies It is normally The normal switch position is MAX power used in the middle 175 Hz position to right provide high frequency emphasis that If you encounter a hum or buzz in the ee speech understanding for hard of sound system when the T20 is turned on hearing listeners If the program content is move the switch to the 6 dB middle primarily musical iy can be used in the left position If the buzz diminishes but 20 Hz position The right position persists move the switch to the 12 dB 725 Hz may be used for further low left position If this does not solve the frequency reduction or it may be used to problem refer to the Troubleshooting reduce low frequency system noise due to Guide on page 12 pick up of ventilation system noise etc However if the amount of buzz does not Step 6 Set the RF Power Switch change when the RF powe
7. Range AGC Options Frequency Response Signal to Noise Ratio Front Panel Power Indicator RF Indicators Audio Indicators Audio Level Control 8 45 21 5 cm W x 8 18 20 8 cm D x 1 72 4 4 cm K 3 Ibs 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 IFP 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 75 kHz max for wide band channels 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 1 Standard variable slope compressor limiter 2 Noise Reduction 3 Soft Limit 4 Hard Limit WB 30 Hz 15 kHz 3 OB 25 Max THD NB 30 Hz 5 kHz 3 OB 25 Max THD 60 CB with R7 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 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 PERSONAL PA Receiver Model PPA R7 Dimensions amp Weight Color Battery Type Battery Drain Battery Life FCC ID Operating Freq I
8. W Installation Guide amp User Manual PERSONAL PA Deluxe System 300 Wireless FM Listening System Transmitter Model T20 v s o Receiver Models R7 R7 4 Qy Williams Sound F A PERSONAL PA Deluxe System 300 Installation Guide amp User Manual Contents Page Overview 4 Set Up and Operation 4 T20 Transmitter Antenna Connection Power Connection Audio Connection Using a Microphone Audio Processor Options R7 R7 4 Receivers Using R7 R7 4 Receivers Additional Receiver Instructions Controls and Features 5 Battery Information 10 Suggestions For Receiver Management 11 Using a Remote Antenna 11 Troubleshooting Guide 12 Radio Interference Tuning Instructions 14 Warranty 14 System Specifications 15 v zin 3 Py Williams Sound F A Overview Thank you for purchasing the Personal PA Deluxe System 300 from Williams Sound Corporation Set Up amp Operation T20 Transmitter Step 1 Install the antenna The PPA 300 is a Wide band FM Listening System The rubber duck whip antenna fits into which operates in the 72 76 MHz frequency band the hole ontop of tlie wansmiterand Designed for hearing assistance in places of public threads onto amounting stud inside access the PPA 300 is for those who need help Guide heantenna onte he Side and tirni overcoming background noise reverberation or Glockewisestoauhten Do notice excessive distance from the sound source It s easily integrated force to
9. ansmitter Line Level Input eh 2 TAa SS sO R7 R7 4 Receivers w Earphones T20 Transmitter 4 GT Williams Sound Helping People Hear F A Figure 2 T20 Transmitter Controls amp Features Audio Indicators Tape Out Phones Amber LED Ok for nominal input signal level 1 4 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 JIETTE FM Au itory AssistanceTransmitter Williams Power Audio Level Transmit Status Fak al O O O 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 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 Balanced Audio Input COM INI x vV D q FM Auditory AssistanceTransmitter A Unbalanced Antenna OQ OQ JOD Audio inputs 75 Ohm Channel Hi
10. ansmitter 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 in 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 rubber duckie antenna from the T20 s top panel by turning it COUNTER CLOCKWISE The ANT 005 Coaxial Antenna connects to the Antenna connector on the rear panel of the T20 Transmitter To use this antenna connector remove the shrinkwrap with a sharp knife Step 2 Step 3 Use a pliers to remove the cap on the connector Be sure to turn COUNTER CLOCKWISE to remove the cap Step 4 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 F A Remote Antenna Location Guidelines For maximum signal strength it is best to select an antenna location somewhere within th
11. e 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 inch 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 active 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 Troubleshooting Guide For most efficient troubleshooting use high quality headphones to mon
12. evel control 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 HP light comes on occasionally Reduce the signal level by turning the control counter clockwise if the HI light is on all the time 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 F A 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 Additional Receiver Instructions PPA R7 4 PPA R7 6 The R7 4 and R7 6 receivers feature a channel selector knob on top of the receiver Turn the selector knob until you hear the desired program Model R16 The R16 Receiver features a microphone input and dual volume controls The taller knob turns the receiver on and off and controls the FM signal level The shorter knob controls the microphone signal level By adjusting the two volume controls you can hear a mixture of the FM signal and nearby sounds picked up by the microphone For more information see the instructions included with the R16 Battery Information
13. he 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 F A Radio Interference Figure 6 T20 Channel Selection Tuning Instructions Wide Band Channels 1st Digit 2nd Digit Freq MHz NA 72 100 72 300 72 500 72 700 72 900 75 500 75 700 75 900 74 700 75 300 The PPA 300is usually not disturbed by other radio services However there are no clear or exclusive channels for ANY radio service One of the unique features of the PPA System 300 is that the operating frequency can easily be changed to an alternate channel in the field to avoid interference gt o ooon ojo o N oao oy BY on 4 O omrop nmoowS gt z The T20 Transmitter provides 10 wide band and 10 narrow band standard frequencies for hearing assistance use 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 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 14 775 15 225 15 275 79 300 75 325 15 375 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 Transmitter Frequency Change Procedure Se
14. itor what is being transmitted 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 2 Make sure the electrical outlet is on No sound through receivers 1 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 the receiver frequency matches the transmitter frequency The frequency sticker is on the bottom of the transmitter and inside the back cover of the receiver If they do not match see the Tuning Instructions on page 14 2 Ifnone 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 frequency Look at the two channel switches on the T20 s rear panel checking the settings against the chart on top of the T20 4 Check to see if the Transmitter is connected properly to the sound system See page 6 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 Ifyou 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
15. nes 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 4 Figure 3 Using The Audio Cable Supplied With The System From Sound System Line Output RCA to RCA Cable on DE eee RCA to 1 4 Adapter To T20 Concentric Jack x A Williams Sound Helping People Hear W Figure 4 Audio Connection Wiring Detail Dynamic Low Impedance Mic Simplex Powered Condenser Mic Unbalanced Dynamic Mic Battery Powered Condenser Mic Balanced Line Balanced Line Unbalanced Line 4 8 Or 16 Ohm Speaker Line 25 or 70 Volt Speaker Line x A Williams Sound Helping People Hear Ss 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 F A Figure 5 T20
16. ntermediate Freq FM Deviation De Emphasis AFC Range 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 Gray 9 Volt Eveready 522 Alkaline or BAT 003 Ni Cad 14 mA nominal 32 hours with Eveready 522 6 hours charge with BAT 003 CNM R7Y Pre Tuned Adjustable 72 MHz 76 MHz 70 kHz 30 kHz 75 uS 300 kHz Williams Sound Corp Cf 10399 West 70th St Eden Prairie MN 55344 3459 U S A 800 328 6190 952 943 2252 FAX 952 943 2174 www williamssound com 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 Sensitivity Squelch Input Overload Frequency Response Signal to Noise Ratio Receive Antenna Audio Output Output Connector Earphone 1 4 jack 600 mV 1002 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
17. objects Battery damage and burns can result Use only Williams Sound Supplied chargers and batteries x A Williams Sound Helping People Hear F A 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 to 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 5 Regular users purchase their own earphone or headphone and bring them to use with receivers at the facility x A Williams Sound Helping People Hear 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 is needed for maximum operating distance Per FCC Rules only antennas supplied by Williams Sound may be used with this tr
18. r switch is In some situations the radio signal moved from MAX to 12 dB the buzz is produced by the transmitter can enter not related to RF interference from the other types of equipment and create a hum T20 or buzzing sound in the sound system This is due to poor RF protection in the OT Wiliams Sound F A The system range is decreased when power is reduced but usually still covers the entire seating area Step 7 Use a receiver to test the system and set the input level control 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 5 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 Step 4 Soft Limit Mode The T20 can also operate in a soft limit mode which allows full dynamic range of audio signals This mode 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 wi
19. t Choice 2nd Choice 3rd Choice TAPE OUT or LINE OUT BOOSTER or BRIDGING 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 4 for connection details Use the audio cable and adaptor supplied to connect the T20 Audio In jack to an Step 3b Step 4 appropriate audio output jack on the sound system mixer or amplifier See Figure 3 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 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 Any professional low impedance microphone may be used with the T20 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 micropho
20. t the two rotary Channel selector switches to match the desired channel listed on the the chart on top of the transmitter See Figure 6 One of the 10 standard wide band channels must be selected for use with R7 or R7 4 Receivers The narrow band channels are available for use with Williams Sound s line of narrow band receivers including the R19 and R19 4 CE CO NI Od OF AS Cd NO CG C CO NI Od OF BY Gd DO CO CO CO Ny Od OF BY G9 PO CO CO CO Ny Gd O11 BS G9 NO CO CL CO N Od OF 4 Gd Po 1 J 1 J 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 oO 14 GT Williams Sound Helping People Hear F A Receiver Frequency Change Instructions Tuning for the R7 R7 4 and R 16 Receivers is determined by a single tuning coil and is stabilized by phase locked loop circuitry A plastic tuning wrench PLT 005 is needed to adjust the receiver tuning coil Step 1 Use the transmitter as a tuning signal source Have someone speak into the microphone so you have something to listen to Disconnect the antenna from the transmitter The receiver must be tuned under weak signal conditions Step 2 Step 3 Open the back of the receiver
21. th external signal processing For assistance in selecting an alternate audio processing mode contact Williams Sound technical assistance at 1 800 328 6190 K A Williams Sound Helping People Hear Step 1 Step 2 Step 3 Step 5 Receiver Instructions Receiver Models R7 R7 4 R7 6 R16 Receiver Model PPA R7 has a single wheel type volume control and an earphone output jack To install the batteries open the battery compartment using a coin in the slot in the bottom of the receiver Press the batteries into place observing proper battery polarity Plug the earphone or headphone into the earphone jack Turn the receiver on by rotating the volume control in the direction of the arrow on top of the case Turning the knob in the direction of the arrow will increase the volume Turning the knob against the arrow will decrease the volume To avoid draining the battery make sure the receiver is turned off when not in use If you are using the T20 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 T20 with a 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 l
22. tighten the antenna Ieonly needs with your existing sound system or can be used with to be finger tight a microphone as a stand alone system If the optional remote antenna ANT 005 Your PPA 300 has two principal parts the T20 is more appropriate contact your dealer or Transmitter and the R7 or R7 4 Receivers Much like Williams Sound Corp The remote antenna a miniature radio station the transmitter and installation is detailed on page 11 microphone pick up the sounds you want to hear and Step 2 Connect the Transmitter to Power broadcast them over an FM radio signal The receivers pick up the broadcast up to 500 feet away To avoid difficulties read through this manual as you begin to use the system Then save it for 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 free at 1 800 843 3544 Figure 1 Overall System Diagram 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 Microphones Sound System Amplifier C0000 Line Level Output gq Baga LEM Autory AssistanceTr
23. to expose the circuit board Open the receiver battery flap first The receiver back snaps open like a book Step 4 Locate the tuning coil See Figure 7 Use the headphone supplied with the receiver to listen for the transmitter signal while you slowly and gently rotate the tuning slug inside the tuning coil with the tuning wrench Adjust the tuning coil slowly and carefully Do not press down on the tuning slug Adjust for maximum signal Re tune all the receivers and mark the new frequency inside the case for future reference Step 5 Figure 7 R7 Receiver Tuning Tuning Coil X A Williams Sound Helping People Hear Warranty The Williams Sound T20 Transmitter and R7 R7 4 R7 6 and R16 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 F A PERSONAL PA SYSTEM 300 SPECIFICATIONS PERSONAL PA Transmitter Model T20 Dimensions Weight Color Rack Mount Power FCC ID Operating Freqs Stability Deviation Pre Emphasis RF Field Strength Nominal
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