, till the BER% become low and perfect to QSO, listening How to adjust Frequency offset? 1, Programming your DMR radio, 2, Programming your Repeater radio.Īdjust Motorola XPR4550 DMR radio, possible offset -500Hz, -400Hz. In particular: For Motorola, Hytera DMR devices, frequency offset causes Repeater, Broken QSO to fail to open. So Calibration Frequency Offset is very necessary, especially in old GM300 and Motorola digital radio. You will find it will easy to decode your radio RF signal in low BER%, but if your radio have big frequency offset, it will hard to decode voice and data in your Digital radio. Your DMR/C4FM/P25/DSTAR/NXDN radio decode bandwidth (MMDVM TX):12.5KHz, Repeater board Sampling frequency bandwidth (MMDVM RX) :25KHz, Very Important Process: Calibration Frequency Offset Pi-Star settings Pi-Star Expert mode Key words: Accessory connector Pinouts ,connection diagram, Data Jack, Make a DMR channel programming screenshot Upload a video to Youtube and EMAIL to Normal running Status The Normal Status of MMDVM boot up Simplex HOTSPOT (Change the domain "pi-star" to your LOCAL IP ,such as 192.168.1.100, if pi-star can't visit) Ĭonfig Static Talkgroup (to DMR BM Server) This config will replace your WIFI SSID with my WIFI, you must change your WIFI config, before reboot.This config with BI7JTA callsign and DMRID, you have to register your ID and change your BM Password.If you buy with TF card from BI7JTA, please ignore this step. 4.1 Install NextionDriver for Model 8/Model 10īegin December 1, 2019, I will continue update this WIKI page instead of Google blog, I am working on MMDVM just for my hobby, I am happy to share my knowledge and resources about MMDVM opensource project.2.12 RadioCPS (Programming software), templates.2.11.4 COS LED bright means RX and TX work (in Duplex/repeater mode).2.11.2 Simplex and Repeater diagram (Motorola 16 Pins and 20 Pins).2.11.1 Very Important Process: Calibration Frequency Offset.2.10.1 Configure Static Talkgroup for DMR.2.6 Config Static Talkgroup (to DMR BM Server).
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