Saturday, April 13, 2024
Friday, April 5, 2024
Friday, April 5, 2024
Saturday, April 13, 2024
问题:声波的周期和波长有何关系?假设有一频率为1000Hz的声音,当它在空气中传播时,其波长为多少米(空气中的声速为344米/秒)?...
Saturday, April 13, 2024
Friday, April 5, 2024
Saturday, April 13, 2024
问题:调制指的是什么?广播节目信号发射前为何要进行调制?...
Saturday, April 13, 2024
Saturday, April 13, 2024
Saturday, April 13, 2024
问题:在兼容制彩色电视系统中,对色差信号都进行了哪些处理?为什么要进行这些处理。...
Saturday, April 13, 2024
Friday, April 5, 2024
Wednesday, February 21, 2024
Saturday, April 13, 2024
Saturday, April 13, 2024
Friday, April 5, 2024
Saturday, April 13, 2024
问题:DAB系统的工作频段是多少?DAB系统的主要优点是什么?...
Saturday, April 13, 2024
问题:将模拟信号转换成数字信号要经过哪些处理环节?每个处理环节的具体作用是什么?...
Saturday, April 13, 2024
Thursday, March 14, 2024