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Sepura SC21 Series User Manual

Sepura SC21 Series
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During incoming or outgoing emergency calls, audio is always routed to the radio's speaker.
A full duplex call is always routed to the radio's earpiece.
Whisper mode
Whisper mode allows you to talk more quietly than normal but still be heard and understood by the
person you are calling. It can be useful to switch to Whisper mode when providing confidential
information.
If you select a User Profile which already increases the sensitivity of the microphone, depending on
your radio's customisation Whisper mode may not increase the sensitivity further.
To enable Whisper mode
Depending on customisation, to enable Whisper mode, you can:
press a programmed soft key
rotate the Navi-knob to decrease the volume to below its lowest level
The radio sounds a low-high level alert when Whisper mode is enabled.
To disable Whisper mode:
Depending on customisation, to disable Whisper mode, you can:
press a programmed soft key
increase the volume until the volume level meter displays at least the minimum level
increase the volume to its loudest level then attempt to increase the volume further
The radio sounds a low-high level alert when Whisper mode is disabled.
Audible tone alerts
Certain events on your radio initiate audible tone alerts. These alerts are attenuated when you select
a user profile which uses covert mode (see User profiles on page94).
1. To toggle audible alerts
2. Select Menu > Options > Alerts > Audio Alerts.
3. Press Toggle (or the Select/Send key) to toggle alerts on/off.
If your radio is powered off with Audio Alerts disabled, they remain disabled when the radio is next
powered on.
Vibration alerts (Haptics)
Your radio can provide vibration alerts and haptic feedback to help you recognise certain events,
such as when a key is pressed, for example in a dark environment, or when you are wearing gloves.
User Guide 29

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Sepura SC21 Series Specifications

General IconGeneral
IP RatingIP54
Operating Temperature-20°C to +55°C
Channel Spacing25 kHz
Ingress ProtectionIP54
ChannelsUp to 2000
Frequency Bands380-430 MHz, 806-870 MHz
Battery LifeUp to 14 hours
RF Power Output1W
TETRA Air InterfaceETSI EN 300 392-2

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