This SIS mixer receiver is reliable, and can achieve good noise performance even operated at 4.3k temperature with a close cycle helium refrigerator.
这种SIS混频接收机性能可靠，且可用闭合循环氦制冷机冷却，在4.3K温度操作即可达到好的噪声性能。
The basis for selecting the reasonable temperature difference at the hot end of the first main heat exchanger of close-cycle 4.4K refrigerator is provided.
将其测试结果与模拟试验结果进行了比较，为闭式循环4.4K制冷机的第一级主换热器的热端温差的合理选取提供了依据。
In this paper, a close-cycle shaker control method, which is realized by using a two-channel FFT analyzer and a PC, is studied.
本文研究了一种利用双通道FFT分析仪和PC机实现激振器闭环控制的方法。
In this paper, a close-cycle shaker control method, which is realized by using a two-channel FFT analyzer and a PC, is studied.
本文研究了一种利用双通道FFT分析仪和PC机实现激振器闭环控制的方法。
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