Televisionsystems, which transmit 30 picture frames per second, must operate on a broad electromagnetic spectrum.
每秒传输30幅图象画面的电视系统，它必须工作于宽带电磁波谱。
2
Abstract: lightning damage to the cable system is very strong. In the cable televisionsystems, lightning protection design is a very important job.
摘要：雷电对有线电视系统的危害十分强烈，在有线电视系统中，防雷设计是一项十分重要的工作。
3
The FCC had imposed substantial charges on cable televisionsystems, relying on a broad delegation of authority to regulate the communications industry.