Model 441 OEM PCB Analogue Dual Phase Lock-in Amplifier

A dual phase lock-in amplifier with manual setting, using jumpers, for input mode, sensitivity, low pass filter time constant and reference signal course phase control. Can be used in either of the following three modes:

1. 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.

2. R calculation - on board circuitry provides the modulus of the X and Y components.

3. Single channel 1F and 2F operation - one input signal and two demodulators operating at 1x and 2x the reference frequency to measure the first and second harmonics of the input signal.

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)

Power: -15 V, 0 V, +15 V and +5 V dc at 50 mA per supply rail.