3.3
How to use the Audio Box
3.3.1 Controls and Indicators
On/Off button for external audio interface
Operating control LED for external audio interface
Volume controls for headphone
Auto-Mute button
Status LED for the Auto-Mute function
Mono/Stereo switch
Battery compartment for two AA batteries
Connection for mobile phones or music players
3.3.2 Volume Control
Set the volume controls
to a medium level. With the left control you can adjust the volume
for the left ear and vice versa, if you put on the headset to wear the microphone on the left hand
side. With the volume controls only the volume of the intercom signal can be adjusted. The
volume of external audio sources (e.g. MP3 players) must be set at the appropriate devices.
If the volume level is set too high you can damage your hearing and critical sounds
such as warning alarms are hard to hear!
3.3.3 Mono/Stereo Switch
In general you will receive a mono sound source so that the Mono/Stereo switch
can remain
set to “Mono”. When using a stereo intercom system, set the Mono/Stereo switch to “Stereo”.
Note:
If you set the Mono/Stereo switch to stereo despite a mono intercom system, you will
hear the headphone signal only on one side.
3.3.4 On/Off Button
Pressing the On/Off button
activates the external audio interface of the audio box. The audio
box has to be turned on only when using a mobile phone or music player such as a CD or MP3
player. Hold down the button until the LED
will illuminate or extinguish.
When the audio box is turned on, the LED
above the button
will illuminate. If the battery
capacity is reduced, the LED
starts flashing slowly to indicate that the battery capacity is around
20 hours. If you cannot turn on the audio box or if it turns off after a short time of operation
you will have to change the batteries.
Note:
The HS 400 headset can also be operated when the audio box is turned off.
3.3.5 Auto-Mute Button
By using the auto-mute button
you can turn the auto mute function of the audio box on or
off. If a signal from the wireless receiving set or intercom system occurs, the volume of the
external device is set automatically to 10% of the volume when the auto-mute function is
activated. Shortly after the signal the volume of the external device is set to the previous level.
When the auto-mute function is activated, the status LED
will illuminate.
Note:
When phoning we recommend deactivating the auto-mute function. Otherwise your
own voice, which is reproduced by the intercom system, can fade out the person you are
talking to.
22 | 23
english
