How do I adjust the sensitivity of the Lock-In Amplifier?
Written by Paul Cracknell
Updated at February 8th, 2021
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Moku:Go
Moku:Go Arbitrary Waveform Generator Moku:Go Data Logger Moku:Go Frequency Response Analyzer Moku:Go Logic Analyzer & Pattern Generator Moku:Go Oscilloscope & Voltmeter Moku:Go PID Controller Moku:Go Spectrum Analyzer Moku:Go Waveform Generator Moku:Go Power Supplies Moku:Go Digital Filter Box Moku:Go FIR Filter Builder Moku:Go Lock-in Amplifier
- Moku:Lab
- Moku:Pro
Unlike some lock-in amplifiers, Moku:Lab's Lock-in Amplifier does not have a sensitivity setting.
Instead, you can adjust the output gain to achieve a similar effect. Sensitivity determines how the lock-in amplifier maps the input level to the output level. For example, a 1 mVpp sinusoidal signal is mapped to a 0.25 mV DC signal at the output, assuming a 0 phase difference. If we apply a 40 dB gain at the output, the signal is now mapped to a 25 mV DC. The maximum output gain without saturating is recommended.