MDO-2204EG 200MHz, 4-channel, DSO, Spectrum analyzer, dual channel 25MHz AWG
The GW Instek MDO-2204EG is a 4-channel multi-functional mixed-domain 200MHz oscilloscope that also includes both an actual spectrum analyzer in the design - not just an FFT calculation to display the frequency domain – and a two-channel 25MHz arbitrary waveform generator. The MDO-2204EG combination of scope, spectrum analyzer and AWG makes it ideal for educational use or for space-restricted situations.
A conventional digital oscilloscope uses FFT calculations over the entire signal bandwidth up to half the sampling rate. But inadequate calculation capability means it is impossible to have a signal's detailed frequency information due to the insufficient frequency resolution from the calculation. In contrast, the MDO-2000E series analyzes just a defined signal spectrum of interest to allow engineers to effectively conduct precision signal measurements in the frequency domain. Users can input specific data of interest regarding the signal: center frequency, span, start/stop frequency similar to a traditional spectrum analyzer. While observing frequency domain display, engineers can observe waveform characteristics, which are not easily to be seen from time domain waveforms, for instance, the harmonic composition of a waveform and the frequency characteristics of a modulation signal. Compared with oscilloscope' FFT, MDO-2000E series allows engineers to effectively conduct signal measurements both in the time and frequency domains.
The MDO-2000E series frequency domain also includes Spectrum Trace Type settings (Normal, Max-hold, Min-hold, and Average). Users can select various Spectrum Traces for simultaneous display. Detection method (Sample, +Peak, -Peak, and Average) can be individually set for each trace.
Offering an advantage over conventional spectrum analyzers, the spectrum function of MDO-2000E series can test signals that are below 9kHz, such as audio and vibration signals. The MDO-2000E series can also test signals that have a DC component without damaging the instrument. The MDO-2000E series offers the same capabilities as real-time spectrum analyzers, but faster than frequency sweeping. This is because the MDO-2000E series utilizes advanced digital circuitry and software to render the frequency display. Ordinary spectrum analyzers process narrow frequency bandwidths which are frequency swept over time. Thousands of frequency sweeps are collected to form a spectrum. The FFT settings of ordinary digital oscilloscopes are dependent on the horizontal scale or sample rate setting, which is totally different from the frequency range setting of the MDO-2000E series. Most DSOs will have insufficient frequency resolution.
