论文部分内容阅读
本文简要介绍了采用一比特自相关技术实现的５１２路数字式自相关频谱仪的工作原理及系统的硬件和软件构成。该频谱仪主要用于分米及厘米波段分子谱线观测。频谱仪系统时钟可在６２５ｋＨｚ至２０ＭＨｚ之间按２的倍率选择。最大分析带宽为１０ＭＨｚ。最高频率分辨率为０．６１ｋＨｚ，相应于１８ｃｍ波段的速度分辨率为０．１ｋｍ／ｓ．文章最后给出了利用上海天文台２５ｍ射电望远镜观测ＯＨ脉泽源的结果。
This article briefly introduces the working principle of the 512-channel digital autocorrelation spectrum analyzer and the hardware and software structure of the system implemented by one-bit autocorrelation. The spectrometer is mainly used for decimeter and centimeter band spectrum observation. The spectrum analyzer system clock can be selected at a magnification of 2 between 625kHz and 20MHz. The maximum analysis bandwidth is 10MHz. The highest frequency resolution is 0.61 kHz, corresponding to a velocity resolution of 0.1 km / s for the 18 cm band. Finally, the article gives the result of observing the OH pulse source by the Shanghai Astronomical Observatory's 25m radio telescope.