Research on Self-Loop Test Device Model Based on Analog Channel
Telecontrol analog channel is the bridge of full-duplex communication between the dispatching master station and the plant station terminal,and the timeliness of channel defect processing is the weak point of automatic operation and maintenance.In order to solve this technical problem,this paper studies a set of analog channel"four-wire channel"self-loop test device,which can be used to diagnose the quality of analog channel and quickly locate the channel fault when the device is connected to the self-loop in the terminal block of automatic master station terminal/station terminal modem.It can not only simulate the master station server to actively send test messages and test the channel status,but also realize the channel self-loop function by short-circuiting the transmitter and receiver at the device access to channel node,and the access device does not affect the normal transmission and reception of the channel under normal operation.
locating channel faultself-loop test devicetest channel status
万方数据
维普
