SR830 DSP Lock-In Amplifier 1-6 DISPLAYS Channel 1 4 1/2 digit LED display with 40 segment LED bar graph. X, R, X Noise, Aux Input 1 or 2. The display can also be any of these quantities divided by Aux Input 1 or 2.
SR830 BASICS WHAT IS A LOCK-IN AMPLIFIER ?Reference, Lockin