7
Figure 11:
Switch the headphones off after use. Reconnect the headphones to the transmitter to
recharge the batteries.
To ensure the unit is functioning properly, make sure the volume of the sound
source (headphone connection) is sufcient. To check this, you could, for exa-
mple, set it to half the volume available. For some devices (e.g. TV), you need to
set the volume of the headphone connection via the conguration menu. If the
volume is too low, the socket switches itself off after about 2 minutes of operation. This
automatic switch-off function ensures compliance with EMC regulations by avoiding an
unnecessary occupation of transmission frequencies.
A high amount of IR light, e.g. sunlight or a bright incandescent lamp in the room, can
weaken the audio signal and cause interference. If this problem occurs, move the system
to a darker area.
Technical Specications
System: Infrared (IR)
Carrier frequency: Left channel 2.3 MHz
Right channel 2.8 MHz
Modulation: FM
Power supply of transmitter: 200 mA, 12 V AC/DC adapter
Power supply of headphones: 2x R3 (AAA) batteries
Frequency range: 20–18,000 Hz
Signal-to-noise ratio: 50 dB
Distortion: 0.5% THD
Channel separation: 40 dB
Safety instructions:
The device is not protected against drops or splashes of water. Do not let the product
come into contact with rain, moisture or other liquids to avoid damaging the device and to
prevent injuries due to short circuits. Only connect the device to a mains socket that has
been approved for the device. The mains socket must always be easily accessible. Do not
subject batteries to excessive heat, sunlight, re or similar. Never use or open a defective
device. Repair work may only be conducted by an authorised specialist. As with all elec-
tronic devices, keep the device out of the reach of children.
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