HearClear |
(Conventional Personality, Rx Options) |
Selects to enhance audio clarity by applying a compression / expansion algorithm to the transmitted and received signals respectively. This feature applies for the current Conventional Personality.
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With companding, the dynamic range of the transmit audio is compressed and then expanded to its original level in the receive audio. Therefore, companding must be enabled on both the transmitting and the receiving radios or distorted audio will result. Since the compression / expansion algorithm is active both on transmit and receive audio, expanding uncompressed audio or compressing audio without subsequently expanding it will both result in unnatural-sounding audio output. The audio path to the dispatcher must also be companded. |
For analog signals.
When the Rx Voice / Signal Type field is set to "Non-ASTRO" or "Mixed Mode", and
when the 
referenced
Conventional System selected
in the ASTRO System field is
not a "DVRS" System
Type, and
when the DVRS Hardware Enable field is disabled.
SELECTIONS: |
DEFINITIONS: |
Disabled |
No noise cancelling or companding is applied to the transmit / receive signals. |
Companding Only |
Companding is applied to both the transmit and receive audio. See Important Note. |
Noise Cancellation Only |
Noise cancellation is applied to the receive audio. |
Companding and Noise Cancellation |
Companding is applied to both the transmit and receive audio (see Important Note) and noise cancellation is applied to the receive audio. |
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