DESCRIPTION Original cystal : Original ECS-TXO-3225-147.4-TR from USA Duplex variant of MMDVM_HS_Hat This PCB uses the MMDVM_HS . It has two ADF7021 onboard and allows for duplex operation with two time slots on DMR. Setting Tips: Modem select: STM32_HS_GPIO Package List: 1x MMDVM duplex HotSPOT Module 2x Antenna 2x SMA socket See more

WORK with RASBERRY Pi: Mounts cleanly on current Raspberry Pi including the Pi Zero , NOT compatible with Rasberry Pi 4. FREQUENCY: UHF 433-900MHz, VHF 144-220 MHz. NOTE: TX =0, RX=0. Modem select: STM32_HS_GPIO. EASY OPERATION: The firmware is pre-loaded and is easily upgraded via software. Onboard LEDs showing status (Tx,Rx,PTT,Mode). HIGH PERFORMACE: 32-bit ARM processor, up to 10mW RF power, fully tested every piece. WIDELY COMPATIBLE: Supports DMR, P-25, D-Star and System Fusion. if the board fails to work on duplex mode, please run the upgrade command: sudo pistar-mmdvmhshatflash hs_dual_hat ;.