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。
Allen Bradley Electronic Operator Interface Terminal
Allen Bradley Industrial Computer Panel View
USED VMIC VMIVME-7698-146 Celeron Socket Computer Board
USED Xycom XVME-678 VMEbus PC/AT Processor Module
USED Xycom XVME-675 VMEbus CPU Control Board Processor
USED Xycom XVME-674 VMEbus CPU Control Board Processor
.USED Xycom XVME-674 VMEbus CPU Control Board Processor
USED Xycom XVME-688 VMEbus PC/AT Processor Module