Design of load data simulation source

In the remote sensing satellite system, the main function of the data transmission subsystem is to receive all the data transmitted by the payload subsystem and then transmit it accurately to the data receiving station on the ground. In the absence of satellite payloads, to meet the requirements of the joint remote sensing satellite test link, we studied and designed a load data simulation source that can simultaneously output four channels of continuous data at different rates, and there are two operating modes to choose from. This design adopts Kintex UltraScale series FPGA with configurable Microblaze embedded soft core as the core controller, and the peripheral circuit includes four pieces of 2GB DDR4 memory, power supply and LVDS interface output. The actual test results show that the load data simulation source has high stability and good universality, and can perfectly meet the ground debugging and testing requirements of remote sensing satellite data transmission subsystem.