1-GHz Bandwidth Digital Spectro-Correlator System for the Nobeyama Millimeter Array
Open Access
- 1 April 2000
- journal article
- research article
- Published by Oxford University Press (OUP) in Publications of the Astronomical Society of Japan
- Vol. 52 (2) , 393-400
- https://doi.org/10.1093/pasj/52.2.393
Abstract
We have developed 1-GHz bandwidth digital spectro-correlator system for the Nobeyama Millimeter Array (NMA). It consists of 2Gsample/sec·2bit analog-to-digital (A/D) converters and an ultra-wide band digital correlator. We developed two kinds of special-purpose LSI having functions of delay compensation and correlation, respectively. With these LSIs, the ultra-wide band digital correlator realizes 1024-MHz bandwidth spectroscopy with 128-channel resolution for 15-correlation data. This system allows us to observe radio continuum emission with about a two-times better signal-to-noise ratio than that of the previous correlator system. We started common-use observations with this new system from 1997 March; the system has been extended in order to obtain 21-correlation data for a 7-element “Rainbow„ ( NMA + 45-m telescope ) interferometer system.Keywords
This publication has 0 references indexed in Scilit: