3M Peltor MT7H7A4610-NA User Manual page 7

EN
3.2 Recharging batteries
Insert a blunt tool under the edge of the clamp and pull outwards/upwards. Remove the battery and charge it separately, or leave
the battery in place and charge it in the hearing protector.
3.3 Switching the headset on and off
Press and hold the On/Off/Mode button (A:10) for two seconds to switch the headset on or off. A voice message will confirm that
the unit has been switched on or off. The button will start to flash when switched on. The last setting is always saved when the
headset is switched off.
Note! The automatic power-off time of 2 hours (factory default) can be adjusted in the set up menu. Automatic power-off is indi-
cated by a voice message: "automatic power off" followed by a series of short tones for 10 seconds, then the unit is switched off.
3.4 Scrolling through the menu
Press the On/Off/Mode button (A:10) briefly to browse through the menu. A voice message confirms each step.
3.5 Surround volume (level dependent function for ambient sound)
Press the + button (A:11) or – button (A:12) to adjust the ambient sound volume. Each change is confirmed by a voice mes-
sage. You can choose between 6 volume levels, with level 6 allowing a maximum of 82dB. To switch this function off, press the
– button (A:12) for two seconds. When this function is switched off it is confirmed by the voice message "surround volume off".
Press the + button (A:11) to switch this function back on. Note! When this function is switched off you will not hear any ambient
sound, which could be hazardous.
3.6 Radio volume (volume of built-in communication radio)
Press the + button (A:11) or – button (A:12) to adjust the sound level. Each change is confirmed by a voice message. You can
choose between 6 volume levels. To switch this function off, press the – button (A:12) for two seconds. When this function is
switched off it is confirmed by the voice message "Radio volume off". Press the + button (A:11) to switch this function back on.
Note! No radio communication can be heard when the volume is switched off. Note! When the volume is switched off all the
applicable menus are hidden
3.7 Channel (radio frequency)
Press the + button (A:11) or – button (A:12) to adjust the channel. Each change is confirmed by a voice message.
You can choose between 30 channels. See table F Radio channel frequencies.
3.8 VOX (Voice Operated Transmission)
VOX enables the LiteCom Plus to transmit automatically when sound above a certain level reaches the microphone. This allows
radio transmission without pressing the PTT button (A:15).
Press the + button (A:11) or – button (A:12) to adjust the sensitivity of voice operated transmission. Each change is confirmed
by a voice message. You can choose between five levels or switch this function off. When the level is low it is easier to transmit.
To switch this function off, press the – button (A:12) for two seconds. This is confirmed by the message "VOX off". The PTT
button (A:15) must now be used to transmit. Press the + button (A:11) to switch this function back on. Alternatively switch voice-
operated transmission on or off by briefly press the PTT button twice. A voice message confirms the current VOX setting.
The radio has a Busy Channel Lock Out (BCLO) function that prevents VOX operation if the channel is being used for other
transmission. An audible tone indicates that the channel is already being used. Note! To activate the VOX function the speech
microphone (A:9) must be very close to your mouth, 1–3 mm (figure G). The user's voice will be heard in the headset when the
radio is transmitting.
3.9 Sub menu
This gives access to settings that are only adjusted occasionally. The sub menu is accessed by pressing the + button (A:11)
and – button (A:12) at the same time for 1 second. To return to the main menu, press and hold the + button (A:11) and – button
(A:12) at the same time again or wait 10 seconds without pressing any button to return automatically to the main menu.
3.9.1 Squelch (hiss reduction)
"Squelch" means that background hiss in the earphones is prevented when the incoming signal is below the set squelch level.
Press the + button (A:11) or – button (A:12) to adjust the squelch level. Each change is confirmed by a voice message. You can
choose between five levels or switch this function off. A low squelch level may permit longer range. To switch this function off,
press the – button (A:12) for two seconds. This is confirmed by the message "squelch off". Press the + button (A:11) to switch
this function back on.
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