In small signal measurements there is often a large portion of noise which can sometimes have even higher level than signal itself. If the frequency and phase of the signal is known, measuremnt can be done by using synchronous detection.
In small signal measurements there is often a large portion of noise which can sometimes have even higher level than signal itself. If the frequency and phase of the signal is known, measuremnt can be done by using synchronous detection. (en)
In small signal measurements there is often a large portion of noise which can sometimes have even higher level than signal itself. If the frequency and phase of the signal is known, measuremnt can be done by using synchronous detection. (cs)