432 - Scitec Instruments Lock-in Amplifiers

Scitec Instruments 432 Overview

Scitec Instruments Model 432 and Model 442 are OEM analogue lock-in amplifiers with digital interfaces for controlling the boards. Both the single phase Model 432 and dual phase Model 442 are suitable for making amplitude and phase measurements but it is significantly easier with the Model 442. These boards are controlled via a digital interface which can connect to either an 8 bit bus of a µController or µProcessor or to the parallel port of a PC. 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 controlA single phase lock-in amplifier with computer interface for selection of input mode, sensitivity, low pass filter time constant, output gain, offset and phase control (fine and course) of the reference signal. Sensitivity: 1 µV to 1 V in 1, 3, 10 steps for 1 V output Reference input: TTL/CMOS with mark/space of 1:10 to 10:1 (triggered from rising edge only). Sine, triangular, square waves etc with amplitudes from 200 mV to 10 V. Fine phase adjust: 0_ to 150_ in 256 steps. Computer interface: 34 pin IDC connector can be connected to PC parallel port Power: -15 V, 0 V, +15 V dc at 50 mA per supply rail.