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Lock-In Amplifiers
SR510 and SR530  Analog lock-in amplifiers
SR530 Lock-In Amplifier Sine Wave Mixing The SR510 and SR530 have differential inputs with 7 nV/
SR510 & SR530 Lock-In Amplifiers
√ Hz of input noise and 100 M Ω input impedance. Theinput can be configured as a voltage input, or as a current
input with 10 The core of the SR510/SR530 is a precision analog sine-wavemultiplier. Lock-ins use a multiplier (
demodulator) to
translate the input signal (at the reference frequency) down to
DC where it can be filtered and amplified. Many lock-ins use
square wave multipliers which introduce spurious harmonic
responses. The SR510/SR530 use clean sine-wave multiplierswhich are inherently free of unwanted harmonics. Signal Input
· 0.5 Hz to 100 kHz frequency range· Current and voltage inputs
· Up to 80 dB dynamic reserve
· Tracking band-pass and line filters
· Internal reference oscillator manufacturers · Four ADC inputs, two DAC outputs · GPIB and RS-232 interfaces · SR510 ... $2495
The SR510 and SR530 are analog lock-in amplifiers whichcan 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. In addition, both lock-ins come
equipped with a variety of features designed to make them
simple to use.
(U.S. list) 6 V/Again and an input impedance of 1 k Ω tovirtual ground. Full-scale sensitivities from 500 mVdown to
100 nVare available.Three input prefilters can be selected. The first is a line notchfilter providing 50 dB of rejection at the line frequency. The
· SR530 ... $2995
(U.S. list) Stanford Research Systemsphone: (408)744-9040 www .thinkSRS.com