HT98R068-1 Two-way Radio OTP MCU
Audio – Pre-emphasis/de-emphasis Funtction Set
The Emphasis function is used to modulate the high/low frequencies of the power
spectrum so as to obtain a more average power spectrum density and a better S/N ratio.
The high frequency power spectrum of a typical signal tends to reduce while noise will
increase rapidly as the frequency rises. This is quite opposite to the signals and will
cause a bad S/N ratio, so emphasis will be used to improve this unbalanced situation.
The control bit I/O CMD-2Ch [5] is setup as follows:
Emphasis Enabe Flow
Flow description:
<82C20>: Setup data: 220h. 2Ch [5] = 1 enables the Emphasis.
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