Moku:Lab's lock-in amplifier instrument allows you precisely configure your system and monitor the lock-in's performance from an intuitive user interface.
UPDATE - The latest update brings a host of (free!) new features to all Moku:Lab users including:
- External Demodulation Modes including a PLL (phase-locked loop).
- Polar Coordinates (R/Theta)
- PID Controller
- Auxiliary Outputs
- Input Gain
- Data Logging
Lock-in Amplifier Features
- Block diagram view of the digital signal processing with built-in probe points for signal monitoring
- Demodulate signals at up to 200 MHz.
- ± 80 dB gain range
- 50Ω / 1MΩ input impedance
- Analog signal output with 4 MHz bandwidth
- Pure integrator mode
- LO output up to 200 MHz with variable amplitude
- 90 dB dynamic reserve
- Adjustable time constant from 40ns to 0.6s
- 6 or 12 dB/octave filter roll-off
+ Can I adjust the corner frequency of the low-pass filter?
Yes! It is adjustable from 237 mHz to 3.98 MHz via an iPad, Python or Matlab.
+ What is the maximum rate at which I can save data, and how many points can I save?
The sample rate is dynamically adjusted by the horizontal zoom of the display, and can be set up to the full ADC sample rate of 500 MS/s. Currently you can save 16k points for two channels simultaneously. For longer term data taking use the new data logging mode. Logging to CSV is supported at up to 1 kS/s. For faster data rates use the .li binary format which allows logging to SD card at up to 100 kS/s and logging to the Moku:Lab's RAM at up to 1 MS/s.
+ Can the Lock-in Amplifier demodulate using an external source?
Currently the Lock-in Amplifier demodulates using an internal source. The September 2017 software update added support for direct demodulation with an external source, demodulation with a PLL (Phase-locked loop) locked to an external source, and the ability to modulate and demodulate at different frequencies.
+ Does the Lock-in include a PID controller for feedback applications?
Yes! A PID controller was added in the September 2017 update. Update your iPad App to get all the new goodies.
+ The Lock-in can readout I and Q (X and Y). What about R and theta?
Following the September 2017 free update, to switch from an X and Y readout to R and theta on the Moku:Lab App, tap the X Y block on the block diagram. The default theta gain is 0.8 V/cycle.