Model 7230 Digital Signal Processing Lock-in Amplifier

The model 7230 is a new concept in general-purpose digital signal processing (DSP) lock-in amplifiers. It offers the excellent signal recovery performance that users expect from our instruments but at a lower price than many competitive models.

We’ve achieved this improvement in price/performance ratio by replacing traditional control buttons and display with easy-to-use control panels that can be operated from any computer via your favourite browser. No longer do you 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.

You can use any web compatible device to operate the model 7230, ranging from a simple netbook to the most powerful development machine, from an Android smartphone to the latest iPad. No special software is needed, since the panels work directly through the device’s browser. All that is necessary is that the computer and instrument be connected to the same Ethernet network.

The instrument is also much more compact than traditional designs, making it easier to accommodate in crowded laboratories, and as it does not include any cooling fans it is completely silent, which is especially useful for acoustic research.

It is normally configured for operation over a frequency range extending from 1 mHz to 120 kHz. However, for a small extra charge it can also be delivered, or upgraded via a firmware update pack, to allow operation at frequencies of up to 250 kHz.


  • 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



This product is manufactured by SIGNAL RECOVERY.

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