Category Archives :User Tutorial

Frequency reverse means reverse radio transmit frequency to receive frequency. and at the same time exchange the CTCSS tone.   ...

Retevis RT72 support upload 13,0000 DMR contacts. This blog learn how to load 13,0000 DMR database into your RT72  ...

When updating the HD1 firmware, how to do if you get " please check connection" Error.  ...

How to receive SSTV images from the International Space Station ISS?   ...

We got some customers feedback said they when they upgrade RT84 firmware or program, they will get an error" Excel Fail; firmware error; even no DMR users are displayed. Today I will tell you how to disappear these errors.  ...

For radio amateurs, they use Yagi Antenna to extend racio communication range. Nowdays, many amateurs use Yagi antenna to receive the signals from the satellite.  ...

A hotspot that can help you to access the talk groups when you don't have a DMR repeater nearby.  Normally hotspots are capable of multiple modes as well, such as D-Star, P25, DMR+, YSF and NXDN… but we are only going to talk about DMR here.   ...

dPMR is a different protocol than DMR. So Ailunce HD1 is not able to listen dPMR446.  ...

Something you need to know when updating firmware.  ...

At first, we need to know what's the radio private call. The private call provides voice service between one individual user and another individual user. About how wo set private call on Ailunce HD1, there are two methods. We can follow the steps below to set it up.  ...