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7230 General Purpose DSP Lock-in Amplifier

7230 has dual reference, dual harmonics in low profile for integration with larger systems  


 
Our lock-in amplifier software

  • Highlights +


    • Virtual Front Panel for low profile design to support integration into larger systems 
    • Dual reference and dual harmonic detection allow signals at two different frequencies to be measured simultaneously
    • Upgradable to 250kHz with typical configuration range from 120 kHz to 1 mHz
    • Ethernet connectivity for flexible, simple browser control
    • Compact design has no mechanical fans so it is completely silent, especially useful for acoustic research

  • Lock-in Amplifiers +


    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.
  • Brochure and Manual +

  • Differentiated Specifications +



     Specifications  7270 7230 7280 7265  7225 
    Dual Reference,
    Dual Harmonics
    YES YES  YES to 20 kHz
    Option to 800 KHz
    or 2 MHz
    YES to 20 kHz NO
    Connectivity Ethernet,
    USB  
    Ethernet,
    USB
    GPIB
    RS232
     GPIB
    RS232
    GPIB
    RS232 
    Frequency Range
    (X to 1 mHz)
    120 kHz
    optional 250 kHz
     250 kHz 2 MHz to 0.5 Hz 250 kHz  120 kHz  
    Dynamic Reserve   100 dB for 1 nV / √ Hz
    Types of References Internal, External
    with Virtual
    Internal, External 
    with Virtual
    Internal, External  Internal, External  Internal, External 
    Control Interface Computer Controlled  Computer Controlled,
    Full Front Panel
    Computer Controlled,
    Full Front Panel
     Computer Controlled, 
    Limited Front Panel
    Computer Controlled,
    Limited Front Panel
  • Detailed Specifications +


    Signal Channel
    Voltage Input
    Modes A only, -B only or Differential (A-B)
    Frequency Response 1 mHz < F < 120 or 250 kHz*
    Full-scale Sensitivity 10 nV to 1 V in a 1-2-5 sequence (e.g. 10 nV, 20 nV, 50 nV, 100 nV, etc.)
    Impedance - FET input 10 MΩ // 25 pF, AC or DC coupled
    Impedance - Bipolar input 10 kΩ // 25 pF, input must be DC coupled
    Max safe input ±12.0 V
    Voltage Noise - FET input 5 nV/√Hz @ 1 kHz
    Voltage Noise - Bipolar input 2 nV/√Hz @ 1 kHz
    C.M.R.R. > 100 dB @ 1 kHz degrading by no more than 6 dB/octave with increasing frequency
    Gain Accuracy ±0.5% typ, ±1.0% max
    Distortion -90 dB THD (60 dB AC gain, 1 kHz)
    Current Input
    Mode Low Noise (10E8 V/A) or Wide Bandwidth (10E6 V/A)
    Full-scale Sensitivity
    Low Noise 10 fA to 10 nA in a 1-2-5 sequence
    Wide Bandwidth 10 fA to 1 µA in a 1-2-5 sequence
    Frequency Response (-3 dB):
    Low Noise 1 mHz < F < 500 Hz minimum
    Wide Bandwidth 1 mHz < F < 50 kHz minimum
    Impedance
    Low Noise < 2.5 kΩ @ 100 Hz
    Wide Bandwidth < 250 Ω @ 1 kHz
    Noise
    Low Noise 13 fA/√Hz @ 500 Hz
    Wide Bandwidth 130 fA/√Hz @ 1 kHz
    Gain Accuracy ±2.0% typ, midband
    Either Input Mode
    Line Filter Filter can be set to attenuate 50/60 Hz, 100/120 Hz, or both frequency bands
    Max. Dynamic Reserve > 100 dB
    Grounding BNC shield can be grounded or floated via 1 kΩ to ground
    Signal Molnitor Amplitude ±1 V FS. This is the signal after preamplification and filtering, but before transmission over the optical link
    Output Impedance 1 kΩ
    Reference Channel
    Reference Input
    TTL input setting
    Freq. Range 1 mHz to 120 or 250 kHz*
    Analog input setting
    Impedance 1 MΩ // 30 pF
    Sinusoidal Level 1.0 V rms*
    Frequency Range 0.5 Hz to 250 kHz*
    Squarewave Input Level 250 mV rms
    Frequency Range 2 Hz to 120 or 250 kHz*
    Reference Channel
    Phase Set Resolution 0.001° increments
    Phase Noise at 100 ms TC, 12 dB/octave slope:
    Internal Reference < 0.0001° rms
    External Reference < 0.01° rms @ 1 kHz
    Orthogonality 90° ± 0.0001°
    Acquisition Time
    Internal Reference instantaneous acquisition
    External Reference 2 cycles + 1 s
    Reference Frequency Meter Resolution 4 ppm or 1 mHz, whichever is the greater
    Demodulator and Output Processing
    Output Filters
    Time Constant 10 µs to 100 ks in a 1-2-5 sequence
    Slope (roll-off):
    TC < 5 ms 6 or 12 dB/octave
    TC > 5 ms 6, 12, 18 or 24 dB/octave
    Synchronous Filter Available for F < 20 Hz
    Offset Auto and Manual on X and/or Y: ±300% full-scale
    Phase Measurement Resolution < 0.01º
    Reference Monitor Rear panel TRIG OUT connector can be configured to generate TTL signal at current reference frequency, internal or external
    Oscillator - General
    Frequency
    Range 1 mHz to 120 or 250 kHz*
    Setting Resolution 1 mHz
    Absolute Accuracy ± 50 ppm
    Amplitude
    Range 1 µV to 5 V
    Max. Setting Resolution 1 µV
    Output impedance 50 Ω
    Sweep
    Frequency Sweep
    Output Range 1 mHz to 120 or 250 kHz*
    Law Linear or Logarithmic
    Step Rate 1 kHz maximum (1 ms/step)
    Amplitude Sweep
    Output Range 0.000 to 1.000 V rms
    Law Linear
    Step Rate 20 Hz maximum (50 ms/step)
    Oscillator Output
    Amplitude
    Accuracy ±0.2% typ
    Stability 50 ppm/ºC
    Distortion (THD) -80 dB @ 1 kHz and 100 mV rms
    Data Storage Buffer
    Size 100,000 data points
    Max. Storage Rate
    Fast Mode up to 1 MHz (X1, Y1, X2, Y2, ADC1, Demod I/P 1, Demod I/P 2)
    Normal Mode 1 kHz
    General
    Power Requirements Via external model PS0110 universal power supply
    Voltage 100 - 240 VAC
    Frequency 47 - 63 Hz
    Power 40 VA max
    Dimensions
    Width Width 15½" (390 mm)
    Depth Depth 10" (250 mm)
    Height
    With feet With feet 3" (75 mm)
    Without feet Without feet 2½" (64 mm)
    Weight Weight 6.6 lb (3.0 kg)
    Options
    Model 7230/99 Increases upper reference frequency limit from 120 kHz to 250 kHz. Can be installed by firmware upgrade.
    Preliminary specifications subject to change without notice
  • Accessories +

  • Optional Software +

    • Acquire Data Acquisition Software

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    • SRInstComms

      SRInstComms is an ActiveX control that allows users of SIGNAL RECOVERY instruments to control them from PC's running Windows XP/Vista.

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