Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9115951s&link_type=abstract
Unknown
Astronomy and Astrophysics
Astronomy
Digital Radar Systems, Frequency Synthesizers, Oscillators, Radar Astronomy, Deep Space Network, Design Analysis, Frequencies, Purity, Spectra
Scientific paper
The digital frequency synthesizer (DFS) is an integral part of the programmable local oscillator (PLO) which is being developed for the NASA's Deep Space Network (DSN) and radar astronomy. Here, the theory of operation and the design of the DFS are discussed, and the design parameters in application for the Goldstone Solar System Radar (GSSR) are specified. The spectral purity of the DFS is evaluated by analytically evaluating the output spectrum of the DFS. A novel architecture is proposed for the design of the DFS with a frequency resolution of 1/248 of the clock frequency (0.35 mu Hz at 100 MHz), a phase resolution of 0.0056 degrees (16 bits), and a frequency spur attenuation of -96 dBc.
Olson Eric
Robinett L. L.
Sadr R.
Satorius E.
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