automatic frequency control

简明释义

自动频率控制;

英英释义

例句

1.In digital communication systems, automatic frequency control helps reduce interference.

在数字通信系统中，自动频率控制有助于减少干扰。

2.Using automatic frequency control, the transmitter adjusts to frequency shifts.

利用自动频率控制，发射器能够调整频率偏移。

3.The radio receiver uses automatic frequency control to maintain a stable signal.

收音机接收器使用自动频率控制来保持信号稳定。

4.The automatic frequency control circuit requires precise tuning for optimal performance.

该自动频率控制电路需要精确调谐以获得最佳性能。

5.The automatic frequency control in this device ensures clear audio output.

该设备中的自动频率控制确保音频输出清晰。

作文

Automatic Frequency Control (AFC) is a crucial technology in the field of telecommunications and signal processing. It refers to a system that automatically adjusts the frequency of a signal to maintain synchronization with a reference frequency. This technology plays a significant role in various applications, including radio broadcasting, satellite communication, and digital television. The primary purpose of automatic frequency control 自动频率控制 is to ensure that the transmitted signal remains stable and free from frequency drift, which can lead to poor signal quality and disrupted communication.In radio broadcasting, for instance, AFC helps maintain the clarity and integrity of the audio signal being transmitted. Without AFC, fluctuations in frequency can cause interference, resulting in static or distortion in the sound. By employing automatic frequency control 自动频率控制, broadcasters can ensure that their signals are consistently clear and reliable, providing listeners with a better experience.Similarly, in satellite communication, AFC is vital for maintaining the connection between the satellite and ground stations. Satellites orbiting the Earth are subject to various forces that can affect their frequency stability, such as gravitational pull and atmospheric conditions. Implementing automatic frequency control 自动频率控制 systems allows for real-time adjustments to the satellite's transmission frequency, ensuring that the communication link remains strong and uninterrupted.Digital television also benefits from automatic frequency control 自动频率控制. As viewers transition from traditional analog broadcasts to digital signals, maintaining synchronization between the transmitter and receiver becomes essential. AFC helps to minimize any discrepancies in frequency, allowing for a seamless viewing experience without pixelation or loss of signal.The underlying technology behind automatic frequency control 自动频率控制 typically involves phase-locked loops (PLLs) and other feedback mechanisms. These systems constantly monitor the output frequency and compare it with a reference frequency. If any deviation is detected, the AFC system makes the necessary adjustments to bring the output back in line with the desired frequency. This process happens in real-time, ensuring that the signal remains stable even in the presence of external disturbances.In conclusion, automatic frequency control 自动频率控制 is an essential component of modern communication systems. Its ability to maintain frequency stability enhances the quality and reliability of various applications, from radio broadcasting to satellite communications and digital television. As technology continues to advance, the importance of AFC will only grow, making it a critical area of study and development in the engineering and telecommunications fields.