Lock-In Amplifier Sampling Rate

1. What is the output of a lock-in amplifier?
2. What does a lock-in amplifier measure?
3. What is input sampling rate?
4. What is sample rate in RF?

What is the output of a lock-in amplifier?

The lock-in amplifies the signal and then multiplies it by the lock-in reference using a phase-sensitive detector or multiplier. The output of the PSD is simply the product of two sine waves. The PSD output is two AC signals, one at the difference frequency (ωr − ωL) and the other at the sum frequency (ωr + ωL).

What does a lock-in amplifier measure?

Lock-in amplifiers are used to detect and measure very small AC signalsall the way down to a few nanovolts. Accurate measurements may be made even when the small signal is obscured by noise sources many thousands of times larger.

What is input sampling rate?

The Sampling Rate determines how many times a second that the analog input signal is "sampled" or digitized by the input device. A sampling rate of 10,000 Hz will sample the signal every . 0001 second. The possible range of sampling rates are limited by the capability of your input device.

What is sample rate in RF?

The sample rate (or sampling rate) is the number of samples taken per second. The units for sample rate are samples per second (sps) or Hertz (Hz). The two are equivalent since the Hertz is equal to the reciprocal second, [Hz]=[s^-1].