The video : The MDO-2000E series is equipped with a 25 MHz arbitrary waveform generator. We could use an arbitrary waveform generator to produce waveforms and perform frequency domain analysis using the built-in spectrum analyzer. Here are 4 spectrum analyzer demos including AM, FM, FSK and frequency sweep.
Demonstration
The MDO-2000E series is a multifunctional mixed domain oscilloscope. The series includes two feature combinations: MDO-2000EG and MDO-2000EX. The MDO-2000EG models feature an integrated spectrum analyzer and a dual channel 25MHz arbitrary waveform generator. MDO-2000EX models include a built-in spectrum analyzer, arbitrary waveform generator, 5000-count digital multimeter and 5V/1A power supply. The first of its kind, the MDO-2000EX is the only oscilloscope equipped with a digital multimeter and a power supply in the T&M industry.
Upon entering spectrum mode, the MDO-2000E series will display a full frequency domain screen. Users can input the center frequency, span, start frequency and stop frequency according to the test requirements to quickly and intuitively observe the required frequency range to let users experience the test user interface. a real spectrum analyzer. While viewing the frequency domain display, engineers can observe characteristics of the waveform that are not readily visible from time domain waveforms, such as the harmonic composition of a waveform. wave and frequency characteristics of a modulating signal. Compared to the oscilloscope FFT, the MDO-2000E series enables engineers to perform frequency domain signal measurements efficiently.
DSO's classic FFT always calculates the full bandwidth of the signal up to half the sample rate (Fs). However, the insufficient calculation capacity cannot perform FFT calculation with more points. Users cannot have the detailed frequency information of the signal due to the insufficient frequency resolution of the calculation result. While the MDO-2000E series analyzes the signal spectrum of interest. Compared to the oscilloscope FFT, the MDO-2000E series enables engineers to perform frequency domain signal measurements efficiently.
The MDO-2000E Series frequency domain also includes Spectrum Trace type parameters (Normal, Max-hold, Min-hold, and Average) (Figure 1). Users can freely choose different spectral traces for simultaneous display. The detection method (Sample, +Peak, -Peak and Average) can be set individually for each Trace. Additionally, users, via Cursor, can manually mark corresponding positions to reflect frequency and amplitude. The search function can also be applied to save the spectrum peak table. Amplitude is displayed with dB and Marker can get measurement data. Users can use the search function to search and mark the amplitude and frequency of the spectral signal. Search methods include Max. peak and threshold. Measurement results can be displayed and saved.
Compared with the general spectrum analyzer, the MDO-2000E series spectral function can test signals below ~9kHz, which is applicable to frequency domain analysis of audio frequency and vibration. The MDO-2000E series can also test the frequency domain signal with a DC component without damaging the instrument. In terms of frequency domain waveform display, MDO-2000E series, which has the same capability as a real-time spectrum analyzer, is faster than the general spectrum analyzer. Why? This is because the MDO-2000E series uses digital circuitry and software to calculate the FFT. The general spectrum analyzer can only process the signal of narrow frequency bandwidth at a time by frequency sweep. Each sweep will take several ms to tens of ms. Hundreds and thousands of frequency sweeps are put together to form a spectrum. Therefore, the displayed spectrum is not obtained at the same time. MDO-2000E series achieves spectrum display at the same time by using digital circuit and software to calculate FFT which is faster than frequency sweep method. The FFT settings of oscilloscopes are based on the horizontal scale setting (sample rate), which is completely different from the frequency range setting of the MDO-2000E series. Most instruments will have insufficient frequency resolution due to insufficient FFT points when measuring the spectrum by FFT. Compared with the FFT of oscilloscopes, the MDO-2000E series satisfies users with signal measurement requirements below 9 kHz; better setting interface, measurement resolution and measurement speed.
