Install Instructions - Williams Sound

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FIGURE 2: T4 TRANSMITTER CONTROLS & FEATURESAudio Level IndicatorsFour-LED array shows audio level in 6 dB steps. Optimum levelis reached when the amber 0 light usually blinks and the red +6light blinks occasionally.Phones Jack1/4" jack, 220 Ω source impedance. Drives mono or stereoheadphone. Monitors exactly what is being transmitted.PPA T4 Professional FM Auditory Assistance TransmitterFrequency Synthesized, Channel-SelectableAudio AdjustAudio LevelPower -12dB -6dB 0dB +6dBRF CarrierWilliams SoundPhonesDecreaseIncreaseLoOkOkToo HiPower IndicatorGreen LEDAudio Level ControlRotary pot, screwdriver adjust,used with audio indicator lightsRF IndicatorGreen LED indicates transmitter RF is onAudio Select SwitchesDIP switch, sets input characteristics, audioprocessing mode, and input filter cutofffrequency. (See top panel chart or Figure 3)Line OutLine level output of the fullyprocessed, as transmitted, audio.Can be used for monitoring,recording, or as a feed for otherequipment.Audio SelectAudio Input(XLR) Bal. MicBal./Unbal line or 70V(TRS) Bal./Unbal .Line or 70VLine OutModel PPA T4 Auditory Assistance FM TransmitterFM Channel,PowerWilliams Sound Corp., Minneapolis, MN USAAntennaPower: 24 VAC,50-60 Hz, 10VA1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8To configure, see chart on top.See chart on top.75 OhmsPlugBalanced/Unbalanced Audio InputCombination 3-pin female XLR/1/4" stereo jack, acceptsbalanced or unbalanced microphone and line level inputs,25 V or 70 V audio inputIMPORTANT: If you choose to connect to 70 VoltSpeaker line, be certain to set the Audio Config switchcorrectly. Severe damage will occur if you do not.FM Channel/FM Power SwitchesDIP switch for setting channel frequency andRF output power level. See chart on top ofunit for switch configurations.PowerConnection3-pin, Molexconnector for TFP016 power supplyWilliams Sound ®Helping People Hear7
CONTROLS AND CONNECTORSFRONT PANELPOWER INDICATORIndicates that the transmitter has power available and that the unit is on.AUDIO ADJUST CONTROLControls level of audio signal and is connected between the input amplifier and the audiolevel processing circuit.AUDIO LEVEL INDICATORA four-LED array shows audio level in 6 dB steps. Indicator is average responding and iscalibrated so that optimum level is reached when the amber 0 light usually blinks and the red+6 light blinks occasionally.RF CARRIER INDICATORThe RF Carrier On Indicator shows when the transmitter is actually transmitting.PHONES JACKThe Phones Jack monitors the processed, “as transmitted” audio. It accommodates standardprofessional headphones with a 1/4" inch Tip-Ring-Sleeve (Stereo) plug. It can accept anyother type of headphone or earphone including those with Tip-Sleeve (Mono) plugs.Earphones with 3.5 mm plugs can be used with a suitable adapter (i.e., Radio Shack Part#274-367). Listening to this signal gives an accurate indication of the audio actually heard byusers.REAR PANELAUDIO SELECT SWITCHInput characteristics, audio processing mode, and input filter cutoff frequency are set by thisDIP switch. A chart of settings is shown in Figure 3 and on the top of the unit. “On” and“Off” are labeled on the body of the DIP switches.Figure 3: Audio Select Switch SettingsAUDIO CONFIG SWITCHAUDIO PROCESSORHI PASS FILTERAUDIO INPUT3 PINMICMIC W/SIMPLEXBAL/UNBAL LINEBAL/UNBAL 70 VLIMITCOMPRESSFLAT– 3 dB AT 200 Hz– 3 dB AT 730 HzTRS PHONEBAL/UNBAL LINEBAL/UNBAL LINEBAL/UNBAL LINEBAL/UNBAL 70 VSWITCH SETTINGS1 2 3 4 5 6 7 8ONOFFOFF OFFON OFFOFF ONOFF OFF ON ON ONONOFFONOFFONONONONONOFFOFF OFF OFF OFF OFFSwitch 1 selects between Limitand Compress ModesSwitches 2 and 3 control theHi Pass FilterSwitches 4-8 must be matchedto your audio inputSee page 13 for plug wiring diagrams.8Williams Sound ®Helping People Hear
Page 1 and 2: InstallationGuide &UserManualPERSON
Page 3: FAST SETUP PROCEDUREStep 1Choose a
Page 8 and 9: INPUTThe input can be configured to
Page 10 and 11: DETAILED SETUP PROCEDURESTEP 1:CHOO
Page 12 and 13: STEP 4:CHOOSE AND CONNECT AN AUDIO
Page 14 and 15: not helpful to the hearing impaired
Page 16 and 17: ASSURING EXCELLENT PERFORMANCEThe P
Page 18 and 19: shorter knob controls the microphon
Page 20 and 21: FREQUENCY CHANGE INSTRUCTIONSNormal
Page 22 and 23: SUGGESTIONS FOR RECEIVER MANAGEMENT
Page 24 and 25: NOISE IN AUDIO “GROWS” WHEN PRO
Page 26 and 27: audio equipment may offer applicati

Install Instructions - Williams Sound

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