4
5
GB
(MT53) instead. The microphone setting can be changed here. It is also possible to switch off the microphone and just use
the headset for listening.
Press the + button (A:11) or – button (A:12) to select the required microphone. Each change is confirmed by a voice message.
3.10.6 Microphone mute (to the external output)
When you use PTT transmission with the built in communication radio this prevents sound from the speech microphone
from being sent to the external output. This menu setting lets you switch this function on or off.
Press the + button (A:11) or – button (A:12) to switch this function on or off. Each change is confirmed by a voice message.
3.10.7 External jack level control
This function permits automatic level control for the incoming signal from external equipment. Press the + button (A:11) or
– button (A:12) to switch this function on or off. Each change is confirmed by a voice message.
3.10.8 Menu return
If the user does not press any button for 7 seconds the headset will return to the first menu level (surround).
This function can be switched on or off in this menu. Press the + button (A:11) or – button (A:12) to choose the desired
setting. A voice message confirms the change.
3.10.9 Restore dealer defaults (resetting)
To restore the factory default settings, press and hold the PTT auxiliary (A:16) for 2 seconds. This is confirmed by the voice
message “restored factory defaults”.
3.11 PTT (Push-to-talk)
Press and hold the PTT button (A:15) to transmit manually using the radio. When the radio is transmitting or receiving the
button (A:10) will flash rapidly. PTT transmission works at all times, regardless of the BCLO and settings (see 3.8 VOX and
3.10.1 Busy channel lockout).
4. IMPORTANT USER INFORMATION
It is recommended that the wearer ensure that:
• The ear-muffs are fitted, adjusted and maintained in accordance with the manufacturer’s instructions.
• The ear-muffs are worn at all times in noisy surroundings.
• The ear-muffs are regularly inspected for serviceability.
Warning!
If the recommendations above are not adhered to, the protection afforded by the ear-muffs will be severely impaired.
• This product may be adversely affected by certain chemical substances. Further information should be sought from the
manufacturer.
• Ear-muffs, and in particular cushions, may deteriorate with use and should be examined at frequent intervals for crack-
ing and leakage, for example.
• The fitting of hygiene covers to the cushions may affect the acoustic performance of the earmuffs.
• This ear-muff is provided with level-dependent attenuation. The wearer should check correct operation before use.
If distortion or failure is detected, the wearer should refer to the manufacturer´s advice for maintenance and replace-
ment of the battery.
This ear-muff is provided with electrical audio input. The wearer should check correct operation before use. If distortion
or failure is detected, the wearer should refer to the manufacturer’s advice.
• Follow the advice in this manual on maintaining and replacing batteries.
Warning!
Performance may deteriorate with battery usage. The typical period of continuous use that can be expected from the ear-
muff battery is 20 hours.
Warning!
The output of the level-dependent circuit of this hearing protector may exceed the external sound level.
Warning!
The output of the electrical audio circuit of this hearing protector may exceed the daily limit sound level.
