Signal Recovery 7230 General Purpose DSP Lock-In Amplifier
The Signal Recovery 7230 general purpose DSP lock-in amplifier provides excellent signal recovery performance from a range of 1 MHz to 250kHz. The 7230 offers much more than just dual phase lock-in detection at the reference frequency of an applied signal. This lock-in amplifier includes dual reference and dual harmonic detection, which allow signals at two different frequencies to be measured simultaneously, and tandem demodulation. The Signal Recovery 7230 also includes virtual reference mode, allowing reference-free measurement of suitable signals.
The Signal Recovery 7230 provides a virtual front panel via a web browser which gives it a low profile for integrating into larger system configurations. This has been achieved by easy-to-use control panels that can be operated from any computer. There is no need to be in front of the instrument to operate it - now you can set up your experiment in the lab but return to the office while it runs, monitoring what is happening via your computer. And if you need to make a change to a setting then it’s as easy as clicking a button on a web page.
| 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) |
| 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) |
- Built-in web pages for control from any computer on the same network
- 1 mHz to 120 kHz (250 kHz with 7230/99 option) operating frequency range
- Voltage and current mode inputs
- 1.0 MHz main ADC sampling rate
- 10 μs to 100 ks output filter time constants
- Precision DDS sinewave oscillator with adjustable amplitude and frequency
- Oscillator output can be amplitude or frequency modulated
- Harmonic measurements up to 127 × F
- Dual Reference, Dual Harmonic and Virtual Reference operating modes
- Auxiliary analog and digital inputs and outputs
- Internal data buffer for recording instrument outputs at rates down to 1 μs per point
- Ethernet, USB, and RS232 computer interfaces
- Free LabVIEW driver