automatic frequency control

简明释义

自动频率控制自动频率调整

英英释义

例句

1.In telecommunications, automatic frequency control is essential for minimizing interference.

在电信中，自动频率控制对于减少干扰至关重要。

2.With automatic frequency control, the transmitter can quickly correct any frequency drift.

通过自动频率控制，发射器可以快速纠正任何频率漂移。

3.The satellite communication system uses automatic frequency control to adjust to changing conditions.

卫星通信系统使用自动频率控制来适应变化的条件。

4.The radio receiver employs automatic frequency control to maintain a stable signal.

收音机接收器采用自动频率控制来保持信号稳定。

5.Many modern televisions incorporate automatic frequency control for better picture quality.

许多现代电视机内置自动频率控制以提高画质。

作文

Automatic Frequency Control (AFC) is a crucial technology used in various communication systems to ensure that signals are transmitted and received accurately. In essence, automatic frequency control (自动频率控制) refers to the process of automatically adjusting the frequency of a signal to match the desired frequency. This technology plays a vital role in radio communications, television broadcasting, and even in modern digital communication systems.One of the primary functions of automatic frequency control (自动频率控制) is to maintain the stability of the carrier frequency. In any communication system, it is essential that the transmitter and receiver operate at the same frequency. Any deviation can lead to poor signal quality, increased noise, and even loss of information. AFC helps to mitigate these issues by continuously monitoring the frequency and making necessary adjustments in real-time.The importance of automatic frequency control (自动频率控制) can be observed in radio transmitters. For instance, when a radio station broadcasts a signal, it must ensure that its frequency remains constant. However, environmental factors such as temperature changes can cause frequency drift. AFC systems are designed to detect these drifts and correct them promptly, ensuring that listeners receive a clear and stable signal.Moreover, automatic frequency control (自动频率控制) is not limited to analog systems; it is also widely used in digital communications. In digital systems, where data is transmitted in binary form, maintaining the integrity of the signal is paramount. Any frequency variation can lead to errors in data interpretation. Therefore, implementing AFC mechanisms in digital modems and transceivers ensures that the data remains intact and the communication is reliable.Another significant application of automatic frequency control (自动频率控制) is in satellite communication. Satellites orbiting the Earth rely on precise frequency control to communicate with ground stations. Any frequency mismatch can result in lost signals or degraded communication quality. By utilizing AFC, satellite communication systems can adapt to changes in frequency caused by Doppler shifts due to the satellite's movement, thus ensuring seamless communication.In addition to communication systems, automatic frequency control (自动频率控制) has applications in other fields such as instrumentation and measurement. For example, in the field of metrology, AFC is used in frequency synthesizers to produce stable and accurate frequencies for testing and calibration purposes. This ensures that measurements are consistent and reliable, which is critical for scientific research and industrial applications.In conclusion, automatic frequency control (自动频率控制) is an essential technology that underpins many aspects of modern communication and measurement systems. Its ability to maintain frequency stability enhances the quality and reliability of signals, making it indispensable for effective communication. As technology continues to evolve, the significance of AFC will only increase, highlighting the need for ongoing research and development in this field.