SR844 - Stanford Research Systems Lock-in Amplifiers

Stanford Research Systems SR844 Overview

The SR844 is the widest bandwidth lock-in amplifier available. Unlike simple down-converters, no additional instruments are required. And unlike analog lock-ins, no manual frequency range switching is necessary. The SR844 provides uncompromised performance with a frequency range of 25 kHz to 200 MHz and up to 80 dB of drift-free dynamic reserve. The SR844 includes the many features, ease of operation and programmability that you''ve come to expect from SRS DSP lock-in amplifiers. Features: 25 kHz to 200 MHz frequency range 80 dB dynamic reserve Time constants from 100 µs to 30 ks (6, 12, 18 or 24 dB/oct rolloff) "No Time Constant" mode (10 to 20 µs update rate) Auto gain, phase, reserve and offset Internal or external reference Two 16-bit DACs and ADCs GPIB and RS-232 interfaces