Using the S1 DIGITAL
20 | S1 DIGITAL
Activating the “auto shut-off” function
The “auto shut-off” function automatically switches the headset off when it is
disconnected from the intercom or when the aircraft avionics are switched off.
With the “auto shut-off” function activated, the operating time is increased. The
headset is delivered ex-works with the function deactivated.
1 Open the cover of the battery compartment on the control unit.
2 Set the Auto Shut-Off switch to the position ON.
3 Close the cover of the battery compartment.
Microphone BIAS – microphone supply for mobile phones
When used in the cockpit, the headset is powered via the intercom. If you want to
use the headset for making phone calls outside the cockpit, you have to deacti-
vate the “auto shut-off” function.
̈ Set the Auto-Shut-Off switch to the position OFF.
Switching the 3-step treble boost on/off
The switches for the 3-step treble boost allow you to individually adjust the
speech intelligibility for the left and right channel separately. For this, you can
boost the frequency response in the approx. 1 kHz to 6 kHz region in three steps.
