描述
信号在长线中传输会遇到三个问题:一是高速变化的信号在长线中传输时出现的波反射现象,二是具有信号延时,三是长线传输会遇到外界干扰。
RITTER PANORAL A1 PANORAMIC X RAY CONTROL SYSTEM BOX
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL d6
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL d7
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL d8
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL d9
DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL e5