amplitude-modulated transmitter

简明释义

调幅发射机;

英英释义

例句

1.To improve sound quality, the engineers upgraded the amplitude-modulated transmitter at the facility.

为了改善音质，工程师们升级了设施中的调幅发射器。

2.During the test, the amplitude-modulated transmitter successfully transmitted audio signals.

在测试期间，调幅发射器成功地传输了音频信号。

3.An amplitude-modulated transmitter can be found in many older AM radios.

许多老式AM收音机中都可以找到调幅发射器。

4.The radio station uses an amplitude-modulated transmitter to broadcast its signal over a wide area.

这个广播电台使用调幅发射器将信号广播到广泛的区域。

5.The amplitude-modulated transmitter operates by varying the amplitude of the carrier wave.

该调幅发射器通过改变载波的振幅来工作。

作文

In the realm of telecommunications, one of the fundamental components that has played a crucial role in the transmission of audio and visual signals is the amplitude-modulated transmitter. This device is pivotal for broadcasting radio signals, allowing us to enjoy music, news, and various forms of entertainment over the airwaves. Understanding how an amplitude-modulated transmitter operates can provide insight into the evolution of communication technology and its impact on society.The basic principle behind an amplitude-modulated transmitter is relatively simple yet ingenious. It involves varying the amplitude of a carrier wave in accordance with the information signal that needs to be transmitted. The carrier wave is a constant frequency signal that serves as the foundation for the transmission. By modulating the amplitude of this wave, the transmitter encodes the information onto it, which can then be sent out through an antenna.Historically, the invention of amplitude modulation (AM) was a significant milestone in the field of radio communications. In the early 20th century, inventors like Reginald Fessenden and Edwin Armstrong experimented with different methods of transmitting sound over long distances. Their work laid the groundwork for the development of the amplitude-modulated transmitter, which became the standard for radio broadcasting.One of the key advantages of using an amplitude-modulated transmitter is its ability to cover large distances. AM signals can travel further than their frequency-modulated (FM) counterparts, especially at night when atmospheric conditions allow for greater signal propagation. This characteristic made AM radio a popular choice for many broadcasters, particularly in rural areas where listeners relied on radio for information and entertainment.However, there are limitations to amplitude modulation. The quality of sound transmitted via an amplitude-modulated transmitter is often inferior to that of FM transmissions. AM signals are more susceptible to interference from electrical equipment, weather conditions, and other environmental factors. As a result, while AM radio remains popular, especially for talk radio and news broadcasts, FM radio has gained a larger share of the market for music broadcasting due to its superior sound quality.Despite these challenges, the amplitude-modulated transmitter has adapted to the changing landscape of technology. With the advent of digital broadcasting and the internet, traditional AM radio faces competition from streaming services and podcasts. However, many AM stations have embraced these changes by offering online streaming options, allowing them to reach a broader audience.In conclusion, the amplitude-modulated transmitter represents a foundational technology in the world of telecommunications. Its ability to transmit audio signals over vast distances has shaped the way we receive information and entertainment. While it faces challenges in the modern digital age, the resilience of AM broadcasting demonstrates the enduring significance of this technology. As we look to the future, understanding the principles behind the amplitude-modulated transmitter not only enriches our knowledge of communication technologies but also highlights the historical advancements that have paved the way for today's innovations in media and broadcasting.

在电信领域，发挥着至关重要作用的基本组件之一是调幅发射器。该设备对于广播无线电信号至关重要，使我们能够通过无线电波欣赏音乐、新闻和各种娱乐形式。了解调幅发射器的工作原理，可以让我们深入了解通讯技术的发展及其对社会的影响。调幅发射器的基本原理相对简单却极具巧妙性。它涉及根据需要传输的信息信号来改变载波的幅度。载波是一个恒定频率的信号，作为传输的基础。通过调制该波的幅度，发射器将信息编码到上面，然后通过天线发送出去。历史上，调幅的发明是无线电通信领域的一个重要里程碑。在20世纪初，雷金纳德·费森登和爱德温·阿姆斯特朗等发明家对不同的声音远距离传输方法进行了实验。他们的工作为调幅发射器的发展奠定了基础，后者成为无线电广播的标准。使用调幅发射器的一个关键优势是其覆盖大距离的能力。AM信号可以比频率调制（FM）信号传播更远，尤其是在夜间，当大气条件允许更大的信号传播时。这一特性使得AM广播成为许多广播公司的热门选择，特别是在依赖无线电获取信息和娱乐的农村地区。然而，幅度调制也存在局限性。通过调幅发射器传输的声音质量通常低于FM传输。AM信号更容易受到电气设备、天气条件和其他环境因素的干扰。因此，尽管AM无线电仍然流行，尤其是在谈话广播和新闻播报方面，但由于其卓越的音质，FM无线电在音乐广播中获得了更大的市场份额。尽管面临这些挑战，调幅发射器仍然适应了技术变化的环境。随着数字广播和互联网的出现，传统的AM无线电面临来自流媒体服务和播客的竞争。然而，许多AM电台通过提供在线流媒体选项来拥抱这些变化，从而使他们能够接触到更广泛的受众。总之，调幅发射器代表了电信世界中的基础技术。其在广阔距离上传输音频信号的能力塑造了我们接收信息和娱乐的方式。尽管在现代数字时代面临挑战，但AM广播的韧性证明了这一技术的持久重要性。展望未来，理解调幅发射器背后的原理不仅丰富了我们对通讯技术的认识，还突显了为今天的媒体和广播创新铺平道路的历史进步。