10515-0372-4200, Rev. R
55
4.6.1 Audio Settings
Set audio settings such as speaker mute, noise cancellation, PTT, and tones.
1. Enter the Settings Menu.
2. Use to highlight and select AUDIO SETTINGS.
3. Use to select and change settings as desired:
• SPEAKER – Mute or Unmute the speaker audio.
• NOISE CANCELLATION - Enable or disable noise cancellation. Noise
cancellation reduces background noise during transmit.
• PTT - Enable or disable Push-To-Talk (PT
T). Disable to prevent accidental
keying, such as when radio is in holster or you are getting into a car.
• TONES - Enable or disable alert tones (see Table 4-1).
• KEYPAD TONES - Enable or disable keypad tones. When enabled, the radio
plays a tone when a button on the keypad is pressed.
Table 4-1: Alert Tones
Ready To Talk Tone
Unencrypted (Analog FM or
P25 digital)
After a PTT is pressed, this is an audible indication (tone) for
you to begin speaking into the microphone.
1000 Hz for 25 ms
Ready to Talk Tone
Encrypted P25 digital
After a PTT is pressed, this is an audible indication (tone) for
you to begin speaking into the microphone.
1200 Hz tone for 25 ms
PTT Denied
PTT not possible. Momentary tone is present:
• Receive only
• Key not found
• PTT button disabled
• Emergency button disabled
• Emergency not supported for current channel
• Clear transmit denied
544 Hz tone for 75 ms
Maximum transmit duration
expires
Maximum transmit duration is exceeded.
5 beeps and then a 544 Hz
tone for 75 ms
Low Battery Alarm
Alarm sounds upon initial detection of low battery and every
30 seconds thereafter. Tone stops upon detection of a battery
charging state.
Sequence of tones:
• 937 Hz tone for 50 ms
• Silence for 60 ms
• 1300 Hz tone for 50 ms
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