GW Instek MDO-2000E series mixed domain oscilloscope

The MDO-2000E multifunctional mixed domain oscilloscope series comprises the MDO-2000EG and MDO-2000EX models. The MDO-2000EG has a built-in spectrum analyser and a dual-channel 25 MHz arbitrary waveform generator, while the MDO-2000EX features a built-in a spectrum analyser, an arbitrary waveform generator, a 5000-count DMM and a 5 V/1 A power supply.

While entering the spectrum mode, the series will display a full screen of frequency domain. Users can input centre frequency, span, start frequency and stop frequency based on test requirements so as to rapidly and intuitively observe the required frequency range that allows them to experience the user interface of a real spectrum analyser. While observing frequency domain display, engineers can observe waveform characteristics, which are not easily seen from time domain waveforms; for instance, the harmonic composition of a waveform and the frequency characteristics of a modulation signal. The series allows engineers to effectively conduct signal measurements on frequency domain.

The frequency domain includes spectrum trace type settings (normal, max-hold, min-hold and average). Users can freely select various spectrum traces for simultaneous display. Detection method (sample, +peak, -peak and average) can be individually set for each trace. Additionally, users can manually mark the corresponding positions to reflect frequency and amplitude. Users can use the search function to search and mark the amplitude and frequency of spectrum signal.

The series is claimed to be faster than a general spectrum analyser when it comes to frequency domain waveform display, due to its use of a digital circuit and software to calculate FFT. The spectrum function of the series can test below 9 kHz signals, which is applicable to the frequency domain analysis of audio frequency and vibration. The series can also test the frequency domain signal with the DC component without damaging the instrument.