Datasheet

MDO-2000A is an advanced version of MDO-2000E. The selectable bandwidth range is upgraded to 300MHz. The full bandwidth ranges
include 300MHz, 200MHz and 100MHz. The sampling rate has upgraded to Max. 2GSa/s and the memory depth has also been
upgraded to 20M/CH. Hence, the three major specifications of oscilloscopes have been improved. The new models of the series feature
2 channels including MDO-2000A and MDO-2000AG. The entire series offers the functions of oscilloscope and spectrum analyzer. On
top of that, MDO-2000AG features a dual-channel 25MHz arbitrary waveform generator. The new generation MDO-2000A series
provides better sampling rate and memory depth for users to obtain more realistic signal integrity, and higher bandwidth selections meet
the measurement requirements of higher frequencies.
In addition to advanced oscilloscope specifications, the MDO-2000A series is also a dual-domain
test platform. For frequency domain analysis, the spectrum analyzer measurement mode is
provided to allow users to have frequency domain analysis with higher resolution. The FFT
operation on the oscilloscope is limited by the horizontal level setting (sampling rate), and most
oscilloscopes only provide 1k FFT points, so users often cannot get the correct frequency domain
display. The frequency domain provided by MDO-2000A has an operation interface the same as
the general spectrum analyzer. Its fast frequency domain update is like a real time spectrum
analyzer. While operating the spectrum analyzer of MDO-2000A, users can input Center frequency,
Span, Start frequency, and Stop frequency based upon test requirements so as to rapidly and
intuitively observe required frequency range that allows users to experience the user interface of a
real 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.
The figure on the right shows why the resolution of the spectrum analysis is better than that of the
FFT of the general oscilloscope. Therefore, using the frequency domain signal of the spectrum
analysis, the frequency domain peaks and the components of each composition can be correctly
captured, which is impossible for the general FFT. Conventional DSO's FFT always calculates the
entire signal bandwidth up to half the sampling rate (Fs). However, the insufficient calculation
capability can't conduct FFT calculation with more points. Users can't have the signal's detailed
frequency information due to the insufficient frequency resolution from the calculation result.
Whereas MDO-2000A analyzes signal spectrum of interest. The start frequency and stop
frequency of the spectrum analyzer can be selected according to the characteristics of the test
signal, so that the frequency domain signal can be displayed on the screen. Compared with
oscilloscope' FFT, MDO-2000A series allows engineers to effectively conduct signal measurements
on frequency domain. Right illustration shown the conventional DSO's FFT (above figure) VS.
MDO-2000A's Spectrum analyzer (below figure).
MDO-2000A's spectrum analyzer's frequency measurement range is from DC to 1GHz, which can
meet the requirements of the low frequency test of audio and vibration. The general spectrum
analyzer cannot measure the signals below 9kHz. The highest frequency of 1GHz is shown on the
right. MDO-2000A uses a BNC Cable to connect to the RF Signal Generator to obtain the
maximum 1GHz signal frequency. Although the 1GHz signal has attenuated in the time domain,
the input signal can still be obtained in the frequency domain.
The spectrum analyzer of MDO-2000A can automatically adjust to the most appropriate sample
rate according to users' input frequency range. The required data for calculation is also from the
same sampling. By the tremendous calculation efficiency of Zynq SoC, a large amount of
calculation can be done in a very short period of time. Therefore, MDO-2000A can complete a
spectrum faster than a conventional spectrum analyzer. The screen display on the right shows the
spectrum results of MDO-2000A's spectrum analyzer of FSK signal. The parameters of FSK signal:
500mVpp sine wave, fmax: 10.2MHz, fmin: 10.0MHz, bit rate: 10.0kHz. Users can directly input
Center and Span Frequency by an intuitive and swift setting. Fmax and fmin can be clearly
identified from the screen display.
One Oscilloscope ,Two Domains