Satellite electric signal monitoring system

The invention discloses a satellite electric signal monitoring system, which relates to satellite electric signal monitoring technology and fulfils the aim of monitoring a plurality of signals of a satellite system in parallel. The satellite electric signal monitoring system monitors a plurality of paths of periodic signals and switching value signals by adopting a counter circuit, externally acquires a plurality of paths of current signals and voltage signals by adopting a data acquisition circuit, monitors a plurality of paths of various bus data by adopting a bus monitoring circuit, and monitors a plurality of pulse code modulation (PCM) signals by adopting a PCM signal monitoring circuit, wherein all the data monitored by the bus monitoring circuit, the PCM signal monitoring circuit, the counter circuit and the data acquisition circuit is transmitted to a controller in the data transmission way of low voltage differential signaling (LVDS) and then is transmitted to a local area network (LAN) by the controller; and the controller controls a signal generator to generate a plurality of ground analogue signals according to command parameters received by a LAN interface and output the ground analogue signals. Compared with three conventional mainstream GPIB, VXI and PXI test systems, the satellite electric signal monitoring system has the characteristics of higher extensibility, higher environmental temperature adaptability and higher capability of meeting the requirements of small satellite test tasks.