Many of us are aware that the communication range of regular digital/analog walkie-talkies typically spans around 5 to 10 kilometers. To achieve long-distance communication beyond this range, one often relies on public network radios. However, real-life scenarios such as communication coverage within buildings, hotels, high-rise structures, underground areas, and communication dead zones where certain regions cannot connect with others, or mountainous/wooded areas, valleys, and roadways/tunnels/underground construction sites where public network support may be lacking, pose challenges for communication. So, how can we establish long-distance communication between handheld radios or even between handheld radios and a command center in areas where public network base stations cannot provide coverage? This is where a more efficient solution comes into play: digital repeater.
The Role of Digital Repeater
In wireless communication systems, it play a crucial role in extending communication range and expanding coverage. They are essential components of professional wireless communication systems and serve as indispensable devices.
Basic Requirements for Digital Repeater
To ensure communication stability, it must meet three fundamental requirements:
1. Operate in Full Duplex: Repeater stations should work in full-duplex mode, meaning they can transmit and receive simultaneously without affecting normal reception during transmission.
2. Use Different Frequencies: To prevent transmission interference with reception, it often operate on different frequencies and employ techniques such as frequency offset and antenna separation to increase isolation and reduce transmission interference.
3. Share Antennas: To streamline deployment and reduce the complexity of the feeder system, repeater stations commonly employ duplexers, allowing the shared use of a single antenna for both transmitting and receiving.
Classification of Digital Repeater
There are several types, including:
1. Same-Frequency Repeater: Offers time-division duplexing and can cover communication networks with just one antenna, effectively reducing hardware costs.
2. Cross-Band Repeater: Relays signals across different frequency bands, facilitating interconnection between terminals operating in different frequency bands.
3. Different-Frequency Repeater: Deploys in specific environments to establish communication networks. Multiple repeater stations can form cluster systems or various configurations like star networks, all of which minimize investment costs.
The Retevis RT97P is a meticulously designed digital repeater that not only offers a wide range of application functions but also effectively addresses the need for extensive network coverage and expanded communication distance.
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