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AMBE3000 Digital Voice Vocoder on USB.
HW only, see the website for Open Source SW options.

Features: • DVSI AMBE3000 Chip • USB 2.0 Low Power (<100mA) • FTDI FT230XS • Windows, Linux, OS X • UART Packet Interface • 460.8 kbaud D-STAR Applications: • ircddbgateway • Analog Bridge (DummyRepeater) • dvtool file converter • Bi-directional analog to AMBE • WinDV • UDRX Support for D-STAR DV Check the website for availability AMBE HW Vocoder For: • DMR* • dPMR* • Yaesu Fusion • P25 Phase 2 No SW Support for these protocols at this time The ThumbDVTM adds D-STAR DV capability to your computer or laptop. Allowing you to get on the D-STAR network without a radio. The FTDI USB to serial converter has preinstalled driver support for Windows and Linux. Mac OS X is available from FTDI. The ThumbDVTM is sold as a tested unit with applications software offered by others. The ThumbDVTM provides a Packet UART interface at 460.8 kbaud via the FTDI 230XS. 

Audio Data is sent as 16 bits pcm at 8kHz sampling rate. The AMBE Vocoder returns a 3600 bps compressed stream with FEC (Forward Error Correction) which is muxed with 1200 bps of ancillary digital data by the D-STAR protocol to produce a 4800 bps D-STAR DV stream. LEDs show Transmit and Receive. This device complies with Part 15b of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

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