射电与亚毫米天文学的宽带FFT光谱仪
天体物理学
2016-08-30 v1
摘要
The core architecture, tests in the lab and first results of a Fast Fourier Transform (FFT) spectrometer are described. It is based on a commercially available fast digital sampler (AC240) with an on-board Field Programmable Gate Array (FPGA). The spectrometer works continuously and has a remarkable total bandwidth of 1 GHz, resolved into 16384 channels. The data is sampled with 8 bits, yielding a dynamic range of 48 dB. An Allan time of more than 2000 s and an SFDR of 37 dB were measured. First light observations with the KOSMA telescope show a perfect spectrum without internal or external spurious signals.
引用
@article{arxiv.astro-ph/0509671,
title = {A broadband FFT spectrometer for radio and millimeter astronomy},
author = {Arnold O. Benz and Paolo C. Grigis and V. Hungerbuhler and Hansueli Meyer and Cristian Monstein and Bruno Stuber and D. Zardet},
journal= {arXiv preprint arXiv:astro-ph/0509671},
year = {2016}
}
备注
Astronomy and Astrophysics, in press