OE2031 detects an input signal in a single-ended mode or a differential voltage mode. With an ultra low-noise preamplifier, the input noise is as low as 3 nV/√Hz@997 Hz. The input impedance is 10 MΩ and the full-scale input voltage sensitivity ranges from 1 nV to 1 V. Besides, OE2031 can be used for current measurement with gains of 106 or 108 V/A.
The reference signal can work in external mode or internal mode. In internal mode, a precise and stable internal oscillator generates sine wave as an internal reference that is multiplied by the input signal. This internal signal is without any phase noise. With the digital phase-shifting technique, the phase resolution of the reference signal is 0.01°. OE2031 can work at any fixed frequency from 1 mHz to 30 MHz in this mode. In external mode, the reference signal can be a sine wave or a TTL pulse or square wave. The rising or falling edge of the external reference signal triggers the Phase Lock Loop (PLL) to lock the external signal.
OE2031 has a 5.6-inch 640 x 480 color TFT-LCD. The measurement results of OE2031, such as X, Y, R, and θ, are shown in numerical form, bar graph, X-Y chart and polar coordinates on the display.
Simultaneous Multiple-harmonic Measurement
The traditional phase-locked amplifier can only measure fundamental frequency signal or one certain harmonic ware at the same time, so it can not meet the requirement in some occasions when measuring multiple frequency components simultaneously is needed. In digital end, OE2031 combined FPGA and ARM technology, which has wider processing bandwidth and more flexible digital framework. The digital processing precision could reach 54 bits and could measure 3-channal harmonic components simultaneously, which makes one OE2031 is equal to three traditional phase-locked amplifiers.
Users can use PC to control OE2031 through communication interfaces, including setting the parameters and reading the measurement data. OE2031 is equipped with a free LabVIEW program, which makes it easy to use in complex scientific experiments.