On-board multi-lane parallel MLVDS bus design for in-orbit embedded satellite test device

The traditional satellite prognostic and health management (PHM) mostly relies on the satellite downlink telemetry data. Nowadays, the application of satellite becomes more diversification and its function becomes much more complicated. As a result, the telemetry data cannot meet the data requirements for satellite PHM due to the limited resources of telemetry channels and low sampling rate. Therefore, satellite in-orbit embedded testing was proposed. In order to satisfy the requirement of large volumes of data acquisition and transmission in satellite in-orbit embedded testing, this article proposes a new data agreement by the modification of the Modbus protocol to unified control 5-lane MLVDS bus. Therefore, a multi-channel parallel MLVDS data transmission bus is proposed to realise the data transmission from the data collection end to the information processing end of the PHM system on-board. The bus protocol designed here is implemented by using the Programmable Logic Part on the Xilinx XC7Z045.