Lock-in Amplifiers

Signal Recovery originated from the Princeton Applied Research, EG&G products for scientific instrumentation.  They are the inventors of the lock-in amplifier.  A lock-in amplifier is an instrument with dual capability.  It can recover signals in the presence of an overwhelming noise background or, alternatively, it can provide high resolution measurements of relatively clean signals over several orders of magnitude and frequency.

  • 7210 Muliti-channel Lock-in Amplifier
    7210 Multichannel Lock-in Amplifier

    • 20 Hz to 50.5 kHz operating frequency range
    • Voltage mode inputs with 0.1 mV to 1 V sensitivity range 
    • All channels are calibrated to each other with synchronized data acquisition
    • Independent control of each input channel 
    • Tandem demodulation operating mode for AM and FM input signals 
    • RS232 and GPIB computer interfaces
    .

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  • 7124 Lock-in Amplifier
    7124 Precision DSP Lock-in Amplifier

    • All analog front end
    • 0.5 Hz to 150 kHz operating frequency range
    • Voltage and current mode inputs
    • 10 µs to 100 ks output filter time constants
    • Dual Reference, Dual Harmonic and Virtual Reference operating modes
    • USB, RS232, and Ethernet computer interfaces

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  • 7270 Lock-in Amplifier
    7270 General Purpose DSP Lock-in Amplifier

    • 1 mHz to 250 kHz operating frequency range
    • 1.0 MHz main ADC sampling rate
    • 10 µs to 100 ks output filter time constants
    • Dual Reference, Dual Harmonic and Virtual Reference operating Modes
    • Internal data buffer for recording instrument outputs at rates down to 1 µs per point
    • USB, RS232, and Ethernet computer interfaces

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  • 7230 Lock-in Amplifier
    7230 General Purpose DSP Lock-in Amplifier

    • 1 mHz to 120 kHz (250 kHz with 7230/99 option) operating frequency range
    • 1.0 MHz main ADC sampling rate
    • 10 µs to 100 ks output filter time constants
    • Dual Reference, Dual Harmonic and Virtual Reference operating Modes
    • Internal data buffer for recording instrument outputs at rates down to 1 µs per point
    • Ethernet, USB, and RS232 computer Interfaces
    • Free LabVIEW driver

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  • 7280 Lock-in Amplifier
    7280 Wide Bandwidth DSP Lock-in Amplifier

    • 0.5 Hz to 2 MHz operation
    • 7.5 MHz main ADC sampling Rate
    • 1 µs to 100 ks output time Constants
    • Dual Reference, Dual Harmonic and Virtual Reference modes
    • Frequency band display mode

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  • 7265 Lock-in Amplifier
    7265 Dual Phase DSP Lock-in Amplifier

    • 1m Hz to 250 kHz operation
    • Direct digital demodulation without down-conversion
    • Synchronous oscillator output for input offset reduction
    • Dual Reference, Dual Harmonic and Virtual Reference modes
    • Spectral display mode

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  • 7225 Lock-in Amplifier
    7225 Dual Phase DSP Lock-in Amplifier

    • 1m Hz to 120 kHz Operation
    • 10 µs to 100 ks output time Constants
    • Synchronous oscillator output for input offset reduction
    • Harmonic measurements to 32f
    • Chopped light measurements
    • AC bridge measurements

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  • 5210 Lock-in Amplifier
    5210 Dual Phase Analog Lock-in Amplifier

    • 0.5 Hz to 120 kHz operation
    • Voltage and current mode inputs
    • Continuous full-scale sensitivity control
    • Powerful fourth-order signal channel Bandpass, Low Pass or Notch filter
    • Up to 130 dB dynamic Reserve
    • Synchronous 15-bit ADC for lower input jitter

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  • 5105 Lock-in Amplifier
    5105 Basic Analog Lock-in Amplifier

    • 5 Hz to 20 kHz operation (or single "spot" frequency up to 100 kHz)
    • Low Cost
    • Squarewave demodulation
    • Adjusting low pass and high-pass signal channel filters
    • Up tp 80 dB dynamic Reserve
    • Chopped light measurements
    • Multiple instrument systems

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