Using the S1 DIGITAL
Switching between mono and stereo mode
The control unit features a mono 
/stereo 
switch F which allows you to switch between mono and stereo mode, depending on the intercom.
Set the mono 
/stereo 
switch F to the desired position:
= mono
= stereo
Using Smart Update
The noise level in the cockpit changes depending on the flight situation. Whenever you perceive a change in the noise level (e.g. during take off and when the cruise altitude is reached), you should perform the Smart Update in order to ensure optimum noise compensation at any given time.
The outer and inner microphones measure the sound and NoiseGardTM/digital is adjusted accordingly via the electronics. Smart Update only works when the headset is switched on.
Press the Smart Update button.
The Smart Update button lights up for approx. 4 seconds and you hear an acknowledgement tone, indicating that NoiseGardTM/digital is adjusted to the noise level.
S1 DIGITAL 19