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WIR TX7 Transmitter Instructions 

250 kHz, Small Area Infrared Transmitter 

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VERVIEW 

Thank you for purchasing the WIR TX7 Infrared Transmitter from Williams Sound Corp. 
Anyone needing auditory assistance to overcome background noise, reverberation, or distance 
from the sound source can benefit from the WIR TX7. 

You can use the WIR TX7 for hearing assistance in conference rooms, listening to the TV, or 
other audio equipment. The TX7 Transmitter features an Automatic Level Control to adjust 
for different audio signal levels and to maintain a comfortable listening level. 

If you have problems at anytime with the WIR TX7, do not hesitate to call us toll-free at 
1-800-843-3544. 

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YSTEM 

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OMPONENTS 

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WIR TX7 Transmitter 

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AC to DC Adaptor (TFP 021) 

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TV Microphone (MIC 070) 

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RCA Plug Adapter (CNA 008) 

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Audio Cable with two 3.5 mm plugs (WCA 073) 

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ETTING 

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TX7 T

RANSMITTER 

The WIR TX7 Transmitter has an adjustable base that allows it to be mounted on a wall or 
cabinet, or placed on top of a TV or shelf. If you will be mounting it on a wall, use the keyed 
mounting holes on the bottom of the transmitter. 

The two horizontal mounting holes are 2-1/4" (5.7 cm) apart and the two vertical holes are 
3" (7.6 cm) apart. 

Place the TX7 Transmitter where it is clearly visible from your listening position. (See Fig 1.) 

Infrared light behaves like visible light, so it is blocked by solid objects. This confines the sig-
nal to the room where the transmitter is located. The Transmitter cannot be placed inside or 
behind anything except glass. The maximum operating distance is approximately 30 feet (9 m). 

TV Microphone
near speaker

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. 1: TX7 T

RANSMITTER 

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ELEVISION 

Williams Sound 

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Helping People Hear

Summary of Contents for WIR TX7

Page 1: ...Microphone MIC 070 RCA Plug Adapter CNA 008 Audio Cable with two 3 5 mm plugs WCA 073 SETTING UP STEP 1 SET UP THE TX7 TRANSMITTER The WIR TX7 Transmitter has an adjustable base that allows it to be mounted on a wall or cabinet or placed on top of a TV or shelf If you will be mounting it on a wall use the keyed mounting holes on the bottom of the transmitter The two horizontal mounting holes are 2...

Page 2: ...nsmitter but use only one transmitter in a room at the same time Otherwise interference will occur STEP 2 CONNECT THE TRANSMITTER POWER SUPPLY Plug the AC to DC Adaptor cord into the DC 12V jack on the base of the TX7 Then plug the Adaptor into an outlet The red power indicator light on the TX7 s front will go on This indicator light goes on when an audio signal of sufficient strength approx 10 mV...

Page 3: ...ver it up or you will lose reception Be sure to turn the receiver OFF when it is not in use IN CASE OF DIFFICULTY If the system does not seem to be functioning 1 Make sure that your television is plugged in and turned on 2 Make sure that the TX7 Transmitter is plugged in and correctly connected to the TV or VCR s audio output 3 If you re using the TV Mic and not getting a signal try turning the TV...

Page 4: ...8 L x 2 3 8 W x 7 8 H 9 2 cm x 6 cm x 2 4 cm 4 48 oz 127 g Color and Material Gray shatter proof polypropylene Battery Type 1 5V AA x 2 Alkaline BAT 001 or Rechargeable AA Ni Cad BAT 026 Battery Life 30 hours with BAT 001 15 hours charge with BAT 026 25 mA nom current drain Modulation Frequency 250 kHz FM 50 µS de emphasis Signal to Noise Ratio 60 dB with WIR TX7 Controls Combination volume On Off...

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