PLC is developed by the combination of early relay logic control system and microcomputer technology.It is an industrial control instrument dominated by microprocessors.It integrates computer technology,control technology and communication technology,and integrates sequential control.,process control and data processing in one,high reliability,powerful functions,flexible control,simple operation and maintenance.
PLC是由早期继电器逻辑控制系统与微机计算机技术相结合而发展起来的，它是以微处理器为主的一种工业控制仪表，它融计算机技术、控制技术和通信技术于一体，集顺序控制、过程控制和数据处理于一身，可靠性高、功能强大、控制灵活、操作维护简单。
HP/Agilent 4193A Vector Impedance Meter, 400 kHz to 110
HP/Agilent E4423-60020 TBR Sampler Board
HP/Agilent 08720-60140 CPU Board Assembly
SRS DS345 Synthesized Function Generator
HP/Agilent 5087-7008 Single Directional Coupler 75ohm
HP/Agilent E4440-60174 A22 PRE AMP ASSY
