Internal Speaker and Microphone
The internal speaker is active when external audio accessories are not used. The internal
microphone is active when you press the PTT button.
Emergency Button
The red emergency button on top of the radio is typically used for P25 Emergency operation but
can be programmed by the PC Programmer for any of the following functions. Ask your radio
programmer how it is set up to function.
Function
Description
Disabled
Ignores any attempted use and provides an error
tone.
Emergency
Mode
The emergency channel is programmed by the PC
Programmer or from the radio keypad. If left unused,
the current channel serves as the emergency channel.
In P25 mode the emergency bit is set. Since analog
modes have no similar function, the radio performs
an open-mic function for the duration and interval
programmed by the PC Programmer.
Zeroize
Erases all encryption keys in the radio.
Alert Tones
Audible tones provide important information about the radio’s operating state or condition.
Tone
Pitch
Tone Length Description
Low
Burst
Error pressing button, failed self-test,
talk time out warning or empty
channel.
Low
Steady
Talk time out, talk inhibit, invalid
mode or radio locked.
Medium
Burst
Button press, passed self-test or
receiving in clear voice.
Medium
Pulsed
Emergency call mode or key error.
High
Burst
Low battery.
High
Pulsed
Individual call.
Backlight
The backlight is illuminated when a signal is received (if programmed by the PC Programmer). It
is activated from an auxiliary button (toggles through settings) on the radio or from the keypad
There is a slight reduction in battery life if using the backlight, but not significant. The power
drain difference between dim and bright is negligible.
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