Spaceborne Multimodal Research And Implementation Of Modem Ground Test Equipment

At present, China’s satellite is developing rapidly,but we unable to repair the satellite orbit, Therefore, In each stage of satellite development and manufacturing We need a variety of tests to ensure the correctness of the design and the performance of the equipment. Satellite ground testing equipment used to test the performance of the satellite to ensure the reliability and validity of the basic functions of the satellite.The ground test equipment consists of the following sections:multi-mode modulator, variable rate demodulator, IF to C-band upconverter, C-band to IF downconverter, C band noise generator, test control software. The main function of the ground test equipment as follows:tested in four different modes, modulating portion generates an analog signal of the channel, the demodulating section responsible beam downlink signal reception and demodulation, The ground test equipment and spaceborne modem connected by baseband interface or radio frequency.The test control software design is the focus of this article. The article first introduces the background of the subject and the purpose and significance of the topic, then established the overall scheme of the ground test equipment according to the base functional requirements of the ground test equipment. Then analysis the basic needs of the test control software. According to the needs of the test control software, I designed the PCI driver, the test control the software front interface and the background control of the software. The test control software achieved the management of the hardware unit, the device mode control, channel management, framing and frame analysis, error bit rate, frame error rate and leakage frame rate of the test statistics, the spaceborne modem status display and so on. Finally, the main function of the software is verified, and made conclusions of the full text.