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How does the receiver process the radio signal?

The radio receiver is a device used to receive radio signals. It can convert the RF signal received by the antenna into a baseband signal. Usually, we know the frequency of RF is very high but the baseband frequency is lower, so it requires the receiver to process. According to different processing ways, radio receivers can be divided into direct-emitting radio receiver amplifiers and superheterodyne receivers.  ...

Read more  Radio receiver,  Amateur Radio

Why does Retevis RT73 appear No menu item error?

Recently we received customer feedback. After trying to make RETEVIS 73 codeplug and writing into radio successfully, they received No menu item when entering the setting menu. but after trying to restore the factory, the menu shows normally. Why is this?  ...

Read more  Retevis RT73,  No menu item

2021.5.5 China Amateur Radio Festival

On 5th May 1940, Chinese amateur radio operators started “On air conference”. On 5th May 1947, the conference covered all the regions in China, it was the biggest on-air event.  ...

Read more  55,  China Amateur Radio Festival

How to choose antenna adapter?

Many antennas of amateur radios are detachable, then customers can replace the higher gain antennas to extend the communication range according to their needs. However, the non-original high-gain antenna interface can't connect to our radio directly, or the antenna is too long to directly connect horizontally, we need to choose a suitable adapter to connect them. So, how to choose the right adapter?  ...

Read more  Antenna adapter,  RetevisRT73

How to Program Retevis RT73 works on a Digital Repeater

How to program RT73 works on a digital repeater. Take RetevisRT97P as an example.  ...

Read more  RetevisRT73,  Program RT73 repeater

Why my walkie talkie shows Unprogrammed?

Retevis RT3, RT8, RT82, RT3S, and RT90 are a  series of DMR walkie-talkies. But we may meet the same question after we programed the walkie-talkie and then turn on the radio, radio shows Unprogrammed like below picture. Why?  ...

Read more  Unprogrammed,  Zone list

Small Settings that you may not know about AILUNCE HD1

We know AILUNCE HD1 is an FPP ham radio. It allows you to program the radio without a computer. Expect this, there are lots of little details that make you feel different from other radios.  ...

Read more  HD1

Why and how to switch to talk around mode for Ailunce HD1?

Ailunce HD1 is a ham radio that supports switching between talk-around and repeater mode. Do you know why and how to switch to turn around mode for Ailunce HD1?  ...

Read more  AilunceHD1,  Repeater,  Talk around