upper sideband

简明释义

上边带

英英释义

例句

1.The upper sideband mode is preferred for voice communications in HF bands.

在HF频段中，语音通信更倾向于使用上边带模式。

2.To improve signal clarity, many radio enthusiasts switch to upper sideband during contests.

为了提高信号清晰度，许多无线电爱好者在比赛期间切换到上边带。

3.When tuning in to a shortwave station, make sure to select upper sideband if the transmission requires it.

当调谐短波电台时，如果传输需要，请确保选择上边带。

4.The upper sideband frequency can be found by adding the modulation frequency to the carrier frequency.

通过将调制频率加到载波频率，可以找到上边带频率。

5.In amateur radio, operators often use the upper sideband to communicate effectively over long distances.

在业余无线电中，操作员经常使用上边带来有效地进行远距离通信。

作文

In the world of radio communications, understanding various terms and concepts is crucial for effective operation and signal clarity. One such term that often comes up in discussions of modulation techniques is upper sideband. The concept of upper sideband refers to a specific method of amplitude modulation (AM) in which the carrier frequency is combined with higher frequencies to transmit information. This technique is particularly important in the realm of single-sideband modulation (SSB), which is widely used in amateur radio, aviation, and maritime communications.To grasp the significance of upper sideband, it is essential to first understand how amplitude modulation works. In traditional AM, a carrier wave is modulated by a lower frequency audio signal, creating two sidebands: the upper sideband and the lower sideband. The upper sideband consists of frequencies that are higher than the carrier frequency, while the lower sideband comprises frequencies that are lower than the carrier frequency. In SSB, only one of these sidebands is transmitted, which allows for more efficient use of bandwidth and power.The advantages of using upper sideband over conventional AM are numerous. For starters, transmitting only one sideband reduces the bandwidth required for communication. This is particularly beneficial in crowded frequency bands where space is limited. Additionally, since the power is concentrated in one sideband, the signal can be transmitted over greater distances with less power, making it ideal for long-range communications.Moreover, using upper sideband can improve the clarity of the transmitted signal. Because there is less interference from the lower sideband, operators often find that signals are clearer and easier to understand. This is especially important in emergency situations where clear communication can be a matter of life and death.In practical applications, operators must choose whether to use upper sideband or lower sideband depending on the context and regulations governing the frequency band they are using. For example, in amateur radio, upper sideband is commonly used on high-frequency bands, whereas lower sideband is preferred for certain other frequencies. Understanding these preferences helps operators communicate effectively and adhere to legal requirements.In conclusion, the term upper sideband encapsulates a vital aspect of radio communication that enhances efficiency, clarity, and range. By focusing on this method of modulation, operators can optimize their communication strategies and ensure that their messages are transmitted clearly and effectively. As technology continues to evolve, the principles behind upper sideband remain relevant, proving that a solid understanding of radio fundamentals is essential for anyone involved in the field of communication. Whether you are a seasoned operator or a newcomer to the world of radio, mastering the concept of upper sideband will undoubtedly enhance your skills and knowledge in this fascinating domain.

在无线电通信的世界中，理解各种术语和概念对于有效操作和信号清晰至关重要。一个经常出现在调制技术讨论中的术语是上边带。上边带的概念指的是一种特定的振幅调制（AM）方法，其中载波频率与更高频率结合以传输信息。这种技术在单边带调制（SSB）的领域中尤其重要，广泛用于业余无线电、航空和海事通信。要理解上边带的重要性，首先必须了解振幅调制的工作原理。在传统的AM中，载波波形被较低频率的音频信号调制，产生两个边带：上边带和下边带。上边带由高于载波频率的频率组成，而下边带则由低于载波频率的频率组成。在SSB中，仅传输其中一个边带，这使得带宽和功率的使用更加高效。使用上边带而非传统AM的优点有很多。首先，只传输一个边带减少了通信所需的带宽。这在频率带宽拥挤的情况下尤其有利，因为空间有限。此外，由于功率集中在一个边带中，信号可以以更少的功率传输更远的距离，使其非常适合长距离通信。此外，使用上边带可以提高传输信号的清晰度。由于下边带的干扰较少，操作员通常发现信号更清晰，更易于理解。这在紧急情况下尤其重要，因为清晰的通信可能关系到生死。在实际应用中，操作员必须根据他们使用的频率带的上下文和规定选择使用上边带或下边带。例如，在业余无线电中，上边带通常在高频段使用，而在某些其他频率上则更偏好使用下边带。理解这些偏好有助于操作员有效沟通并遵守法律要求。总之，术语上边带概括了无线电通信的一个重要方面，增强了效率、清晰度和范围。通过关注这种调制方法，操作员可以优化他们的通信策略，确保他们的信息被清晰有效地传输。随着技术的不断发展，上边带背后的原则仍然相关，证明了对无线电基础知识的扎实理解对于任何参与通信领域的人都是必不可少的。无论你是经验丰富的操作员还是无线电世界的新手，掌握上边带的概念无疑会增强你在这个迷人领域的技能和知识。