This top of the line product is an analog lock-in amplifier designed to measure AC signals with use of lot larger noise levels making it possible to measure even nanovolts. The SR510(single phase) and SR530(dual phase) have low-noise voltage and current inputs. They also have high dynamic reserves, 2-stage time constants and internal oscillator.级产品是一种模拟相放大器测与使用更大的噪水平使它可以测交流信号甚毫微伏。第sr510单相和SR530双相有低噪声电压和电流入。他们也有很的动态储2级的时常数和内振器。