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how to program Retevis RT73 DMR repeater and FM repeater without a computer.   ...

answer one customer question" how to connect Retevis RT73 to a DMR Hotspot simplex"?  ...

use PI to use SDR+GQRX for monitoring. Coupled with its extremely low power consumption, it is really the best choice. After trying, Raspberry Pi+AilunceHS2 can be perfectly adapted to play FT8.  ...

steps how to upgrade AilunceHS2 firmware.  ...

Few days ago, I received a customer problem, how do I install the Nextion Driver on his Pi-Star MMDVM Hotspot? Today I will share my experience how to update the Nextion Display.  ...

Roaming is when a radio is set to automatically move between repeaters depending on which has the strongest signal. In the roaming system you have to set the RSSI (Received signal strength indicator) threshold which is minimum signal strength that the radio will consider to be strong enough before it starts searching for a stronger signal. Roaming function is a safety feature on the mobile radio.  It has roaming fucntion on Retevis RT73.   ...

Do you know why does a mobile car radio need to have scan function?  I think the answer is that the scan function can reduces driver distraction.  ...

After you download RT73 software, you can find that it is very different with other radio's software. if you are familar with DMR, you will figure out how to program RT73 quickyly. When programming RT73, here are something you need to know.   ...

The instruction of RT73 firmware upgrade.  ...

Retevis RT73 as a dual band mini Mobile Radio supports 200.000 DMR Contacts. Today, let's we learn how to upload 200.000 DMR contacts into RT73.  ...