Environmental simulator for high-speed communicating network

The invention comprises MCU, FPCA, keyboard, liquid crystal screen, memory, PC interface and eight communication node interfaces. The MCU makes system control, and converses the key assignment into matrix function to generate control signal, error -selecting signal and speed-selected signal. FGGA is used to implement the main function of simulator, and to make synchronous or asynchronous series connection with the eight channel node interface. The matrix control signal from MCU controls the data current direction to form a switch matrix, and to normalize the variable channel character into multi error code rates. The error-selected signal is used to control error code selection, load composition, and to output error flow analog characteristic. The communication speed selected signal is used to control and generate clock signal of communication speed and sequence control signal.