short wave fade-out

简明释义

短波衰减

英英释义

例句

1.We adjusted the frequency to minimize the effects of short wave fade-out during our broadcast.

我们调整了频率，以尽量减少广播期间的短波衰减影响。

2.During the radio transmission, we experienced a sudden short wave fade-out which disrupted the signal.

在无线电传输过程中，我们经历了突然的短波衰减，这干扰了信号。

3.Operators need to be aware of potential short wave fade-out during long-distance communication.

操作员需要意识到在远程通信中可能发生的短波衰减。

4.The short wave fade-out happened just as I was about to hear the important announcement.

在我即将听到重要公告时，发生了短波衰减。

5.The short wave fade-out made it difficult to catch the latest news from the international station.

这次短波衰减使我们很难收听到国际电台的最新新闻。

作文

In the world of radio communications, the phenomenon known as short wave fade-out refers to the temporary loss of signal strength that can occur when transmitting over shortwave frequencies. This phenomenon is particularly important for amateur radio operators and international broadcasters who rely on shortwave bands to reach audiences across vast distances. Understanding the causes and implications of short wave fade-out is essential for anyone involved in shortwave communication.Shortwave radio waves can travel long distances by reflecting off the ionosphere, a layer of the Earth's atmosphere that is ionized by solar radiation. However, this reflection is not always consistent. Various factors can influence the behavior of the ionosphere, leading to fluctuations in signal quality. For instance, changes in solar activity, such as sunspots or solar flares, can significantly affect the ionization levels in the ionosphere, resulting in a short wave fade-out.Furthermore, atmospheric conditions, such as thunderstorms or heavy rain, can also contribute to this fading effect. When these weather systems are present, they can absorb or scatter the radio waves, making it difficult for the signals to reach their intended recipients. As a result, users may experience intermittent reception, which can be frustrating for those relying on shortwave communications for critical information.The impact of short wave fade-out extends beyond just amateur radio enthusiasts. Many countries use shortwave broadcasting to transmit news, educational programs, and emergency information to remote areas where other forms of communication may be unavailable. When a short wave fade-out occurs, it can disrupt these broadcasts, leaving listeners without access to vital updates, especially during natural disasters or political crises.To mitigate the effects of short wave fade-out, radio operators can employ various strategies. One common approach is to adjust the frequency of transmission. By changing the frequency, operators may find a clearer signal that is less affected by fading. Additionally, using more powerful transmitters can help to overcome some of the loss in signal strength caused by fading.Another effective method is to utilize digital modes of transmission, which can provide better error correction and allow for clearer communication even in poor conditions. Digital modes can reconstruct the transmitted information despite the fading, ensuring that the message gets through.In conclusion, the concept of short wave fade-out is a crucial aspect of shortwave radio communications. It highlights the challenges faced by radio operators and broadcasters in maintaining clear and reliable transmissions. By understanding the factors that contribute to this phenomenon and employing effective strategies to combat it, users can improve their communication capabilities. Whether for personal use, emergency broadcasting, or international communication, being aware of short wave fade-out can enhance the overall effectiveness of shortwave radio operations.

在无线电通信的世界中，现象称为短波消失指的是在短波频率上进行传输时可能发生的信号强度暂时丧失。这一现象对于依赖短波频段向广大受众传播信息的业余无线电操作员和国际广播机构尤为重要。理解短波消失的原因和影响对于任何参与短波通信的人来说都是至关重要的。短波无线电波可以通过反射离子层传播长距离，该离子层是地球大气的一部分，由太阳辐射电离。然而，这种反射并不总是一致。各种因素可以影响离子层的行为，导致信号质量的波动。例如，太阳活动的变化，如太阳黑子或太阳耀斑，可以显著影响离子层中的电离水平，从而导致短波消失。此外，气象条件，如雷暴或大雨，也会对这种消失效应产生影响。当这些天气系统存在时，它们可能会吸收或散射无线电波，使信号难以到达其预期接收者。因此，用户可能会经历间歇性的接收，这对于依赖短波通信获取关键信息的人来说是令人沮丧的。短波消失的影响不仅限于业余无线电爱好者。许多国家使用短波广播向偏远地区传递新闻、教育节目和紧急信息，而这些地区可能没有其他形式的通信。当发生短波消失时，这些广播可能会受到干扰，使听众无法获得重要更新，尤其是在自然灾害或政治危机期间。为了减轻短波消失的影响，无线电操作员可以采用各种策略。一种常见的方法是调整传输频率。通过改变频率，操作员可能会找到一个更清晰的信号，减少消失的影响。此外，使用更强大的发射机可以帮助克服由于消失导致的信号强度损失。另一种有效的方法是利用数字传输模式，这可以提供更好的错误校正，即使在较差的条件下也能实现更清晰的通信。数字模式可以重建传输的信息，尽管存在消失，确保消息能够传达。总之，短波消失的概念是短波无线电通信的重要方面。它突显了无线电操作员和广播机构在保持清晰和可靠的传输时所面临的挑战。通过理解导致这一现象的因素并采用有效的策略来应对它，用户可以改善他们的通信能力。无论是出于个人使用、紧急广播还是国际通信，了解短波消失都可以增强短波无线电操作的整体有效性。