The EG&G 124A is a 2Hz to 210kHz Lock-In Amplifier. The 124A Lock-In Amplifier contains both tuned and untuned input signal channels. The unit accurately measures the rms amplitude and phase of weak signals buried in noise, covers a frequency range of 2Hz to 210kHz with a sensitivity of 500 V. 21 full-scale ranges in 1-2-5 sequence.
