APX 8000XE M2 AND M3
179
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Secure Operations
Hear Clear
ADVANCED FEATURES
There are two components of Hear Clear.
1. Companding:
Reduces the channel noise, e.g. OTA transmission, that is
predominantly present in UHF2 and 900 MHz channel with
the following features.
• Compressor – reduces the background noise flow and
the speech signal at transmitting radio.
• Expander – expands the speech while the noise flow
remains the same at receiving radio.
2. Random FM Noise Canceller (Flutter Fighter):
Reduces the unwanted effects of random FM noise pulses
caused by channel fading under high Signal-to-Noise (S/N)
conditions such as in a moving in a transportation.
The fading effects, heard as audio pops and clicks, are
cancelled without affecting the desired audio signal.
The Random FM Noise Canceller operates only in receive
mode.
Model 3 Model 2
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