SR530 is an analog lock-in amplifier that can measure AC signals as small as nanovolts in the presence of much larger noise levels. Both the single phase SR510 and the dual phase SR530 have low-noise voltage and current inputs, high dynamic reserve, two stages of time constants, and an internal oscillator.

    0.5 Hz to 100 kHz frequency range
    Current and voltage inputs
    Up to 80 dB dynamic reserve
    Tracking band-pass & line filters
    Internal reference oscillator
    Four ADC inputs, two DAC outputs
    GPIB interface
    RS-232 interface