I have a question ADA2200 MS-2698 Figure7. Lock-in amplifier by ADA2200.
1. How long should most suitable MasterClock be set to to measure input sinusoidal signal of 50/60Hz in figure 7.?
2. A signal of a sensor, by a square wave, CHOPPINGU, is it OK by a method?
Is it necessary to multiply by a sine wave?