Tag Archives :N
The Effect of the Gain Antenna on the Signal of the Walkie-Talkie
- Sep 02,2021
- Vivian
- 0 Comments
- User Tutorial
Therefore, installing a high gain antenna on the walkie-talkie can greatly increase the communication space of the walkie-talkie and greatly increase the communication distance. ...
11 Features You Need to Know on Retevis RT85
- Aug 31,2021
- Vivian
- 0 Comments
- Product Introduction
Retevis RT85 is an afforable dual band two-way radio for beinngers. It is a 5W VHF and UHF handheld ananlog radio with 200 memories channels computer programming and dual VFO. ...
What's the Superheterodyne receiver?
- Aug 30,2021
- Yamy
- 0 Comments
- Radio knowledge
Superheterodyne receiver is to convert the high-frequency signal received by the receiver into an intermediate frequency signal through a mixer and then output the intermediate frequency signal to the detection circuit. This intermediate frequency signal is a fixed difference signal obtained by subtracting the local oscillator frequency and the received signal frequency. ...
What's the Local Oscillator
- Aug 30,2021
- Yamy
- 0 Comments
- Radio knowledge
The local oscillator frequency is a term often mentioned in the superheterodyne receivers. The local oscillator frequency is generated by the local oscillator circuit. There is a local oscillator in the superheterodyne receiver, which can output a stable high-frequency electromagnetic wave, which is mixed with the received high-frequency signal to produce a different frequency. This difference frequency is Intermediate frequency, that is heterodyne, which in turn forms superheterodyne receiver. ...
Importance of antenna impedance matching
- Aug 30,2021
- Yamy
- 0 Comments
- Radio knowledge
Impedance is an important parameter of the antenna, which is determined by the physical structure of the antenna, such as the shape, size, material, and environment of use. The impedance matching of the antenna is the process of matching both the impedance of the antenna and transmitting the source through tuning. So, why do you need to do antenna impedance matching? ...
Why does the walkie-talkie have no distance parameter?
- Aug 30,2021
- Yolanda
- 0 Comments
- Radio knowledge
Communication distance is an important indicator of walkie-talkies, but why is there no distance parameter in the parameters of walkie-talkies? There are also some descriptions that have a distance description, but the range is very large, such as 2~5 kilometers. How should I understand this communication distance? ...
How to set TX Authority of Ailunce HD1?
- Aug 26,2021
- Yamy
- 0 Comments
- User Tutorial
Many customers of Ailunce HD1 ask how to set the TX of Ailunce HD1 to be prohibited. do you know how to set it? There are four setting options for TX Authority of Ailunce HD1.we'll show how and why to set it in the blog. ...
Recommend AilunceHD1 to your Ham Friends
- Aug 19,2021
- Vivian
- 0 Comments
- Amateur Radio Topics
The HD1 is the only DMR radio I've owned and I love it. Using the hand mic, I received unsolicited great audio reports with one being from a local digital guru. He commented that it was the best audio he ever heard on DMR. ...
The Difference between Battery Eliminator and Chargers
- Aug 06,2021
- Vivian
- 0 Comments
- User Tutorial
The Difference between Battery Eliminator and Chargers ...
What‘s the common connector of the desktop microphone
- Jul 30,2021
- Yamy
- 0 Comments
- Amateur Radio Topics
When we are doing research on desktop microphones recently, customers have repeatedly suggested adapting to multiple models. But different radio stations have different microphone interfaces. Therefore, based on customer feedback, we have compiled the common interface types that may be used for desktop microphones. ...