Signal amplifier 430

differentialanaloglock-in

Scitec Instruments Model 430 and Model 441 are OEM analogue lock-in amplifiers. Both the single phase Model 430 and dual phase Model 441 are suitable for making amplitude and phase measurements but it is significantly easier with the Model 441. These pcb lock-in amplifiers offer a low cost solution to recovering noisy signals in many situations. • Single and dual phase versions • Differential or single-ended input • Sensitivities from 1 µV to 10 V for 1 V output • High performance wide bandwidth input gain stage • Low pass filter output time constants from 100 µs to 30 s • 1F and 2F reference signal operation • 90° step and fine phase control Model 430 • A single phase lock-in amplifier with manual setting, using jumpers, of input mode, sensitivity, low pass filter time constant and reference signal course phase control. • Sensitivity: 3 µV to 10 V in 1, 3, 10 steps for 1 V output (Gain settings of x0.1 to x330,000) • Reference input: TTL/CMOS with mark/space of 1:10 to 10:1 (triggered from rising edge only) Model 441 • A dual phase lock-in amplifier with manual setting, using jumpers, of input mode, sensitivity, low pass filter time constant and reference signal course phase control. Can be used in either of the following three modes: • Dual phase operation - one input signal with two demodulators operating 90° apart providing both X and Y (or real and imaginery) components of the input signal. • R calculation - on board circuitry provides the modulus of the X and Y components.