The Research on Accuracy Requirements of Digital Front-end AD Converter of Key Module of Astronomical Fabry-Perot Interferometers Controller

Fabry-Perot Interferometers has been more and more widely used in China's astronomical community. At present, the Fuxian Lake Solar Observatory at the Yunnan Observatory has purchased two FPI for use in the spectral observation of the 1m new vacuum solar telescope. As the domestic research on FPI is still relatively small, overseas inquiries to relevant information is not yet accessable. Therefore, understanding its control system is not only needed to research FPI, but also the necessary foundation in daily work. In this paper, a basic review of FPI control system is given, and research is carried out on the analog-digital converting accuracy requirements in the digital front-end of the control system. We calculate the accuracy of the F-P parallel board control and finally select the AD converter that meets the requirements.