Sunday, March 3, 2024
Sunday, March 3, 2024
Thursday, March 7, 2024
问题:下列通信介质中,传输频率最高的介质是()A、双绞线B、同轴电缆C、地面微波D、光纤...
Sunday, March 3, 2024
Tuesday, February 27, 2024
Thursday, March 7, 2024
Thursday, March 7, 2024
Sunday, March 3, 2024
Thursday, March 7, 2024
Tuesday, February 6, 2024
Sunday, March 3, 2024
Thursday, March 7, 2024
Thursday, March 7, 2024
Tuesday, February 27, 2024
Sunday, March 3, 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
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: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:数字基带信号经过()之后变成了()信号,可以在带通信道中传输。...
Thursday, March 7, 2024