Sunday, March 3, 2024
Tuesday, February 27, 2024
问题:设PCM编码器的最大输入信号电平范围±2048mV,最小量化台阶为1mV,试对一电平为+1357mV的取样脉冲进行13折线A压扩律PCM编码,并分析其量化误差。...
Thursday, March 7, 2024
Thursday, March 7, 2024
问题:要成为地球的静止卫星,通信卫星的运行轨道须满足哪些条件?...
Thursday, March 7, 2024
问题:列出RS-232-C中常用的9根线,并简述其作用。...
Thursday, March 7, 2024
Tuesday, February 6, 2024
问题:为什么要进行数字调制?常用的数字调制方式有哪几种?...
Thursday, March 7, 2024
Tuesday, February 27, 2024
问题:同轴电缆用()信号来传递信息A、红外B、光C、声D、电...
Thursday, March 7, 2024
Sunday, March 3, 2024
Thursday, March 7, 2024
问题:什么叫码重?什么叫码距?最小码距的物理意义是什么?...
Thursday, March 7, 2024
问题:一般来说,传输媒介的传输带宽()A、随传输距离的增加而增加B、随传输距离的增加而减小C、与传输距离无关...
Thursday, March 7, 2024
Sunday, March 3, 2024
Thursday, March 7, 2024
Thursday, March 7, 2024
Sunday, March 3, 2024
Sunday, March 3, 2024
问题:为什么要进行数字调制?常用的数字调制方式有哪几种?...
Thursday, March 7, 2024