User's Guide

Sound
Your radio is equipped with a loudspeaker for use during PTTcalls and an earpiece for use during
telephone calls. You can adjust the volume of the speaker and increase the sensitivity of the
microphone (see Whisper mode on the facing page) so that you can speak more quietly. Your
radio also uses sound to alert you to the various operational states.
Adjusting the volume
Rotate the Navi-knob to adjust the volume. A vertical volume meter displays to indicate the current
volume level. The radio sounds an audible tone at the new volume level.
Adjusting the volume of an audio accessory is achieved using Accessory Profiles. See Accessory
profiles on page119.
Loudspeaker on/off
A soft key may be customised to toggle the speaker on and off.
Alternatively:
1. Select Menu > Options > Settings > Loudspeaker ON/OFF.
2. Press Toggle or press the Select/Send key.
Loudspeaker high/low audio mode
A soft key may be customised to toggle the audio output between the radio’s speaker (high audio
mode) and earpiece (low audio mode) as required.
An icon is displayed on the status line to indicate the current mode:
Icon Notification
High audio mode
Low audio mode
When the radio is in the loudspeaker high/low audio mode:
If an RSM is connected, audio is routed to the RSM speaker in high audio mode and to the
radio’s earpiece in low audio mode.
If an earpiece accessory is connected, audio is routed to the accessory in both modes.
When the radio is inserted in a car kit cradle, audio is routed to the car kit speaker in high audio
mode and to the handset earpiece in low audio mode.
28 SC21 Series hand-portable radio