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HT98R068 Two-way Radio MCU
Ex: TX mode, Input = MIC, Output = MOD & SMOD, Sub-tone = DCS, DCS tone=01h
DCS Tx mode Setup Flow:
(1) Tx DCS signal:
(2)Transmit an off tone signal at the end of the signal:
Flow description (1):
<82B01>：Setup the sub-tone channel by selecting the first DCS channel group.
<81E37>：Enable the DAC1, DAC2, AMP1, AMP2, MIC, PGA circuits. DAC1, AMP1 on -
enable the MOD output. DAC2, AMP2 on - enable the SMOD output. MIC on–enable the
microphone circuit. PGA on–enable the PGA input source.
<81B10>：Select the PGA and audio input source paths. Select the PGA input source to
be MIC with the audio out to be DAC common-mode bias to reduce noise.
<81142>：Enter the Tx mode. Select the Tx mode and enable the sub-tone=DCS
function.
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