MAN 143C
Hearing Helper
™
Wireless FM Listening System
16
Sound through receivers is loud, but distorted. Noise (room noise or elec-
tronic noise) seems to grow after talking stops. “Limiting” appears on LCD
display.
• Turn the “Gain Control” on the back of the T800 counterclockwise to
decrease the audio level.
Sound through the receivers is weak and noisy.
• Turn the “Gain Control” on the back of the T800 clockwise to increase
the input signal strength.
• Increase the input signal level from the sound system.
• Batteries may be depleted. Replace the receivers’ batteries.
Buzzing or humming noise in sound system.
• There is nothing wrong with the T800 transmitter. One or more pieces
of equipment in the sound system are being disturbed by RF (Radio
Frequency) signals produced by the T800. 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 the following steps:
• Move the transmitter away from the other sound equipment.
• Make sensitive equipment more immune to RFI/EMI. The manufacturers
of your audio equipment may offer application notes for this purpose.
Williams Sound offers a document giving suggestions for improving RF
immunity in existing audio equipment. (Technical Bulletin: Buzz Or Hum In
The Sound System, FRM 531) Unless you have the necessary technical
skills, this is best left to a qualified electronics repair technician.
