VK6ROX B

Homebrew DStar Repeater

Schematic

Homebrew DSTAR Repeater Schematic

Homebrew DSTAR Repeater Schematic

Nothing especially radical here - the BPF and low noise preamp made a huge improvement to Receive Sensitivity and coverage.

NOMENCLATURE


GMSK the modem encoding system used for DStar.  The GMSK modem converts the DStar noise heard on an FM radio to digital ones and zeros.

AMBE a proprietary VOCODER owned by a company in Boston MA.  The VOCODER is only available in hardware form (an IC)

VOCODER voice encoder / decoder

BPF Band Pass Filter