lower side band

简明释义

下边带

英英释义

例句

1.The lower side band modulation technique is essential for long-distance communication.

对于远程通信，下边带调制技术是必不可少的。

2.Many operators prefer lower side band because it allows for better signal clarity.

许多操作员更喜欢下边带，因为它可以提供更好的信号清晰度。

3.In amateur radio, using the lower side band can help reduce interference from nearby signals.

在业余无线电中，使用下边带可以帮助减少来自附近信号的干扰。

4.The radio technician adjusted the frequency to optimize the lower side band for clearer communication.

无线电技术员调整频率，以优化下边带以获得更清晰的通信。

5.He explained how to set up the transceiver for lower side band operation during the workshop.

在研讨会上，他解释了如何设置收发器以进行下边带操作。

作文

In the world of radio communications, understanding the concepts of frequency modulation and sidebands is crucial for effective transmission and reception. One term that often comes up in this context is lower side band, which plays a significant role in amplitude modulation (AM) and single sideband (SSB) operations. The lower side band refers to the range of frequencies that are lower than the carrier frequency in a modulated signal. This concept is particularly important for amateur radio operators and professionals who work with radio frequencies.To grasp the significance of the lower side band, it is essential to first understand how amplitude modulation works. In AM, the amplitude of the carrier wave is varied in accordance with the information signal. When this modulation occurs, it generates two sidebands: the upper side band (USB) and the lower side band (LSB). The upper side band contains frequencies that are higher than the carrier frequency, while the lower side band consists of frequencies that are lower than the carrier frequency.The use of lower side band is particularly advantageous in SSB communication. Unlike traditional AM, SSB only transmits one of the sidebands, either the USB or LSB, while suppressing the carrier wave. This method significantly reduces the bandwidth required for transmission and improves the efficiency of the signal. For example, when using the lower side band, operators can communicate over long distances with less power and better clarity, making it a preferred choice for many radio enthusiasts and professionals.Moreover, the lower side band is commonly used in various applications such as aviation, maritime communication, and amateur radio. Pilots and air traffic controllers often rely on LSB for clear communication, especially in crowded airspace. Similarly, sailors use lower side band frequencies to ensure reliable communication over vast ocean distances, where other forms of communication may fail.In addition to practical applications, understanding the lower side band also involves recognizing its technical aspects. For instance, when tuning a radio receiver, operators must be aware of which sideband they are using. Selecting the correct sideband is vital for receiving clear signals without interference from adjacent frequencies. This is where the knowledge of the lower side band becomes invaluable, as it allows operators to optimize their equipment for the best performance.In conclusion, the term lower side band is a fundamental concept in the field of radio communications. Its importance cannot be overstated, as it enables efficient and clear transmission of signals across various platforms. By understanding the mechanics behind the lower side band, individuals involved in radio communications can enhance their skills and improve their ability to connect with others. Whether for professional use or personal enjoyment, mastering the concept of the lower side band is an essential step for anyone interested in the fascinating world of radio technology.

在无线电通信的世界中，理解频率调制和边带的概念对于有效的传输和接收至关重要。在这个背景下，常常提到一个术语——lower side band（下边带），它在幅度调制（AM）和单边带（SSB）操作中发挥着重要作用。lower side band指的是在调制信号中低于载波频率的频率范围。这个概念对于业余无线电操作员和从事无线电频率工作的专业人士尤为重要。要理解lower side band的重要性，首先需要了解幅度调制是如何工作的。在AM中，载波波形的幅度根据信息信号进行变化。当这种调制发生时，会生成两个边带：上边带（USB）和lower side band（LSB）。上边带包含高于载波频率的频率，而lower side band则由低于载波频率的频率组成。使用lower side band在SSB通信中尤其有利。与传统的AM不同，SSB仅传输其中一个边带，要么是USB，要么是LSB，同时抑制载波波形。这种方法显著减少了传输所需的带宽，提高了信号的效率。例如，在使用lower side band时，操作员可以以更少的功率和更好的清晰度进行远距离通信，使其成为许多无线电爱好者和专业人士的首选。此外，lower side band在航空、海事通信和业余无线电等各种应用中也很常见。飞行员和空中交通管制员经常依靠LSB进行清晰的通信，特别是在拥挤的空域中。同样，水手们利用lower side band频率确保在广阔的海洋距离上可靠的通信，而其他形式的通信可能会失败。除了实际应用，理解lower side band还涉及识别其技术方面。例如，在调谐无线电接收器时，操作员必须意识到他们正在使用哪个边带。选择正确的边带对于接收清晰的信号而不受相邻频率干扰至关重要。这就是了解lower side band变得无价的地方，因为它使操作员能够优化设备以获得最佳性能。总之，lower side band这一术语是无线电通信领域的基本概念。它的重要性不容忽视，因为它使信号在各种平台上的高效和清晰传输成为可能。通过理解lower side band背后的机制，参与无线电通信的个人可以提升技能，提高与他人联系的能力。无论是出于专业用途还是个人享受，掌握lower side band的概念都是任何对无线电技术这个迷人世界感兴趣的人的重要一步。