Mmdvm HS Dual Duplex Hotspot Board STM32 DVM Wide Digital Modes Tcxo Development Module Kit With 0.96 Inch Oled Display

Specification Product Name MMDVM HS Duplex Hotspot BoardController STM32 microcontroller MMDVM HS GPIO interfaceRF Chipset Dual ADF7021 for full duplex operationRF Power Output up to 10 mWOperating Bands VHF 144 148 MHz 219 225 MHzUHF main 420 475 MHz 842 950 MHzTypical hotspot use 430 450 MHz 433 MHz 900 MHzReference Oscillator 14 7456 MHz high precision TCXO RXoffset 0 TXoffset 0Antenna Ports 2 x SMA female upper TX lower RX Power Supply 5 V via Raspberry Pi GPIO headerInterface to Pi 40 pin GPIO header stackable hat design Modulation Modes DMR P 25 D Star System Fusion and other MMDVM compatible modesSlot Support Time Slot 1Time Slot 2 DMR Board Revision Rev 1 3 with corrected 3 3 V lineShell Material optional version Aluminum alloy cutouts for display and antennasFeatures 1 Full duplex hotspot board with separate TX RX paths and two time slots for advanced DMR use 2 Wide digital mode support works with DMR P 25 D Star System Fusion and more through Pi Star or similar software 3 High stability TCXO Ensures an extremely low bit error rate and achieves zero factory frequency 0ffset at both the transmitter and receiver 4 On board status LEDsOLED support clear indication of TX RX PTT Mode plus 0 96 I2C OLED connection for live information display 5 Raspberry Pi compatible HAT mounts directly on Raspberry Pi including Pi Zero with simple GPIO stacking and SMA antenna connectors 6 Firmware pre loaded and upgr