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4.15.3 The Effect of Distance from the Microphone
Unlike a normal microphone system, noise cancellation makes the level of your voice diminish quickly as
you move away from the radio. The radio starts to see your voice as surrounding noise. Therefore, noise
cancellation requires that you hold the mic close.
4.15.4 Voice Versus Noise Reference Microphone
The voice microphone is located on the top front face of the mic and the noise reference microphone is on
the lower rear side. Do not obstruct either element during radio transmissions.
Figure 4-6: Voice Microphone
Figure 4-7: Noise Reference Microphone
4.16 ENABLE/DISABLE ENCRYPTION
A button on the control head or KMM can be programmed to enable/disable encryption.
See Section 6.4 for the various options that can be programmed to the control head
buttons.
Or
Turn encryption on or off via the Security Menu:
1. Press the Menu button.
2. Navigate to the SECURITY menu.
3. Scroll up or down to highlight ENCRYPTION. Toggle encryption enabled/disabled by pressing the
Group/Channel Select Knob. This option is grayed out if Encryption Mode in the radio’s personality is
programmed “Forced On.”
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