60Hz Rejection

The insensitivity of an amplifier to an interfering signal usually expressed in dB. Twenty dB means 10 times, 40 dB means 100 times, 60 dB means 1000 times, etc. The 60Hz rejection specification means that an interfering 60Hz signal 100 times higher (40dB) than the full-scale sensitivity of .1 volt will not cause an error.