The SR850 is a digital lock-in amplifier based on an innovative DSP (Digital Signal Processing) architecture. The SR850 boasts a number of significant performance advantages over traditional lock-in amplifiershigher dynamic reserve, lower drift, lower distortion, and dramatically higher phase resolution. In addition, the CRT display and 65,536 point memory make it possible to display and process data in a variety of formats unavailable with conventional lock-ins..的850是基于一个创新的DSP数字相放大器数字信号处理的体系结构。的850拥有一个显着的性优势传统的相amplifiershigher动态储备低漂移低失真和更的相位分率。此外CRT显示器和65536点忆可以显示和处理各种不同格式的数据无法与传统的定的。Digital Precision.数字精度。At the input of the SR850 is a precision 18-bit A/D converter which digitizes the input signal at 256 kHz. The A/D converter, together with a high-speed DSP chip, replace the analog demodulator (mixer), low-pass filters and DC amplifiers found in conventional lock-ins. Instead of using analog components, the SR850 is implemented by a series of precise mathematical calculations which eliminate the drift, offset, nonlinearity and aging inherent in analog components. The same DSP chip digitally synthesizes the reference oscillator, providing a source with less than -80 dBc distortion, 100 mHz frequency resolution, and 2 mV of amplitude resolution.在850入是一个精度18位A/D换器将入信号在256千。AD换器DSP片结合取代模拟器Mixer低滤波器和直流放大器的常定发现。不是使用模拟元件在850是由一系列精确的数学算消了漂移偏移线性和化的模拟元件的固有的。相同的DSP片数字综合参振器提供源小于- 80 dBc的失真100兆的率分率和幅度分率2 mV。