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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Digital spectro-correlator system for the Atacama Compact Array of the Atacama Large Millimeter/submillimeter Array
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Digital spectro-correlator system for the Atacama Compact Array of the Atacama Large Millimeter/submillimeter Array

机译：用于阿塔卡马大型毫米/亚毫米阵列的阿塔卡玛紧凑型阵列的数字光谱相关器系统

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摘要

We have developed an FX-architecture digital spectro-correlator for the Atacama Compact Array of the Atacama Large Millimeter/submillimeter Array. The correlator is able to simultaneously process four pairs of dual polarization signals with a bandwidth of 2 GHz, which are received by up to sixteen antennas. It can calculate auto- and cross-correlation spectra, including cross-polarization in all combinations of all the antennas, and output correlation spectra with flexible spectral configuration, such as multiple frequency ranges and multiple frequency resolutions. Its spectral dynamic range is estimated to be higher than 10 ~4 relative to T _(sys) from processing results of thermal noise for eight hours with a typical correlator configuration. The sensitivity loss is also confirmed to be 0.9% with the same configuration. In this paper, we report on the detailed design of the correlator and the verification results of the developed hardware.
机译：我们已经为Atacama大毫米/亚毫米阵列的Atacama紧凑型阵列开发了FX体系结构数字光谱相关器。相关器能够同时处理四对带宽为2 GHz的双极化信号，最多可接收16个天线。它可以计算自相关和互相关频谱，包括所有天线的所有组合中的交叉极化，并输出具有灵活频谱配置的相关频谱，例如多个频率范围和多个频率分辨率。根据典型的相关器配置，经过八小时的热噪声处理结果，其光谱动态范围相对于T_（sys）估计高于10〜4。在相同配置下，灵敏度损失也被确认为0.9％。在本文中，我们报告了相关器的详细设计以及所开发硬件的验证结果。

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