One Oscilloscope ,Two Domains

The GW Instek MDO-2202EG is a multi-functional mixed domain oscilloscope with a built-in spectrum analyzer and a dual channel 25 MHz arbitrary waveform generator.

The MDO2202EG is equipped with an 8-inch display and features a bandwidth of 200 MHz. The oscilloscope provides two analog channels with 1GSa/s real-time sampling rate per channel. The waveform update rate of 120,000 wfm/s and the minimum 1mV/div vertical range allow the MDO-2202EG to measure complex feeble signals and clearly display measurement results. With respect to the memory depth, the oscilloscope provides 10M long memory for users to completely retrieve and analyze waveforms.

Users, based upon the application requirements, can select 1k, 10k, 100k, 1M or 10M memory depth. The segmented memory can be divided the maximum into 29,000 sections for users to bypass any unimportant waveforms so as to swiftly search all required waveforms. With the function, more meaningful waveforms can be saved and target waveforms can be displayed rapidly. With the waveform search function, users can rapidly search desired waveforms according to the required trigger conditions. The MDO2202EG also provides 1M FFT display that allows users to correctly and efficiently acquire measurement results of the frequency domain. MDO-2000E series, enhancing by the high waveform update rate of 120,000wfm/sec, Window Zoom and Peak Search, becomes the optimal choice of the economical and multi-function mixed domain oscilloscope.

FRA Frequency Response Analyzer Software

MDO-2202EG also provides the frequency response analysis function (Bode plot). The FRA software can be directly downloaded from GW Instek website. Via arbitrary waveform generator, oscilloscope, and FRA software, users can obtain DUT's FRA characteristic curve plot. FRA has a very wide application range, including product circuit and component performance verification and analysis such as Feedback of Circuit Design, Filter Design, Amplifier Design, Resonant Circuit Design, Cable Frequency Response, and Signal Transformer Performance. Via FRA, users can preliminarily verify product and analyze component's characteristics without the expensive instrument.

The frequency range of FRA is from 20Hz to 25MHz; the number of test point can be selected from 10 to 90 points per decade. After completing the Bode plot, users can select measurement curve by Cursor so as to retrieve each point's amplitude and phase on the curve.

120,000wfm/s Waveform Update Rate and VPO
Waveform Display Technology

The MDO2202EG oscilloscope allows users to easily and completely observe inrush signals and rare transient waveforms to increase waveform debugging efficiency by using features, including advanced VPO (Visual Persistence Oscilloscope) signal processing technology, waveform update rate as high as 120,000 wfm/s, and multi-layered afterglow display to enhance waveform display efficiency. Oscilloscope with VPO technology displays signals with three dimensional waveforms constructed by amplitude, time and signal strength to show each waveform point. 256 color gradients yield clear waveform changes. Comparing with the conventional digital storage oscilloscope, the MDO-2202EG series provides more natural and more genuine signal display effect which is very close to the original analog signal.

Support I2C ,SPI ,UART,CAN, LIN BUS Trigger
and Decoding Functions

The serial bus technology has been widely applied in the present embedded application design. The IoT devices connecting sensors and the peripheral components are using serial bus such as UART, I C, and SPI. To rapidly and correctly trigger and analyze serial bus 2 data has posed a difficult challenge to engineers. The MDO2202EG provides serial bus analysis function with 10M long memory depth. Users can trigger, decode, and analyze frequently used I C, 2 SPI and UART serial bus and CAN/LIN bus, which is often used by automotive communications.

Waveform Search Function

Users can rapidly search desired waveforms according to the trigger condition. After activating the search function, hollow inverted triangles will show the location met the trigger condition. The upper left hand corner Overall will show the total number of waveforms met the trigger condition. Users can set waveform search by the trigger condition such as Edge, pulse width, Runt, Rise/Fall, and Bus. When the trigger condition is met, hollow inverted triangles will appear. Users can save all marks to compare with the next input signal. The front panel of the MDO-2202EG controls waveform zoom-out and play/pause function to swiftly identify each desired event. The function allows users to conveniently complete waveform search and save marks for rapid comparison and analysis.

Datalog Function

Users, via the data log function, can observe waveform changes in long periods of time to ensure product reliability or measure sporadically appeared signals. The data log function, based on the requirements, can set record time and interval. Record time can be selected from 5 minutes to 1000 hours, and record interval is 5 seconds, the minimum. Waveform type for record data and CSV file format for each channel can also be selected. Data can be stored in USB drive, the MDO2202EG or the remote computer via LAN.

Segmented Memory Function

Users Can Select "Analyze Segments" to Conveniently Obtain The Analysis Results.
To achieve the most ideal application for memory depth, the MDO-2202EG has the built-in segmented memory function. The segmented memory function allows users to select the desired important signals for observation. Hence, insignificant signals can be neglected and serial bus decoding; pulse or inrush signals can be identified when retrieving signals. The segmented memory function of the MDO-2202EG allows users to select the number of sections. The maximum sections that can be selected are 29,000. After activating the function, users can select and observe waveform for each segment by turning the Variable knob. The ultimate application of memory depth, therefore, is completely realized.

Mask Function

The MDO-2202EG provides the Mask function, which allows users to apply Auto Mask and user-defined Mask to determine whether the quality of the product meets the regulation. Via userdefined mask, users can set up to 8 areas and each area is up to 10 points to meet test requirements. Users can also refer to the examples from user manual to edit Mask by the PC to satisfy all test needs. By setting Save On, users can log and monitor signals, which violate test conditions.

Spectrum Analyzer Function

While entering the spectrum mode, the MDO-2202EG will display a full screen of frequency domain. Users can input Center frequency, Span, Start frequency, and Stop frequency based upon test requirements 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 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, the MDO-2202EG allows engineers to effectively conduct signal measurements on frequency domain.

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 the MDO2202EG analyzes signal spectrum of interest. Compared with oscilloscope' FFT, the MDO-2202EG allows engineers to effectively conduct signal measurements on frequency domain.

The MDO-2202EG frequency domain also 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, via Cursor, can manually mark the corresponding positions to reflect Frequency and Amplitude. The Search function can also be applied to log spectrum's Peak Table. Amplitude is displayed with dB and Marker can obtain measurement data. Users can use the Search function to search and mark the amplitude and frequency of spectrum signal. Search methods include Max. peak and threshold. Measurement results can be displayed and saved.

Compared with the general spectrum analyzer, the spectrum function of the MDO-2202EG can test below-9kHz signals, which is applicable to the frequency domain analysis of audio frequency and vibration. You can also test the frequency domain signal with DC component without damaging the instrument. The MDO-2202EG is faster than the general spectrum analyzer because it utilizes digital circuit and software to calculate FFT. The general spectrum analyzer can only process the signal of a narrow frequency bandwidth at a time by frequency sweeping. Each sweeping will take several ms to dozens of ms. Hundreds and thousands of frequency sweepings are gathered to form a spectrum. Therefore, the displayed spectrum is not obtained at the same time. The MDO2202EG obtains spectrum display at the same time by utilizing digital circuit and software to calculate FFT that is faster than the frequency sweeping method. The FFT settings of oscilloscopes are based upon horizontal scale (sample rate) setting, which is totally different from the frequency range setting. Most instruments will have insufficient frequency resolution due to insufficient FFT points while conducting spectrum measurement by FFT. Compared with the FFT of oscilloscopes, the MDO-2202EG satisfies users with signal measurement requirements under 9kHz; a better setting interface, measurement resolution and measurements speed.

25 MHz Dual Channel Arbitrary Waveform Generator

With respect to signal source, MDO2202EG features a built-in dual channel 25 MHz arbitrary waveform generator with modulation capability and also provides 14 bits vertical resolution; sample rate of 200MSa/s; 13 output waveforms (Sine, Square, Pulse, Ramp, DC, Noise, Sinc, Gaussian, Lorentz, Exponential Rise, Exponential Fall, Haversine, Cardiac); and AM/FM/FSK modulation and sweep function. The friendly user interface is the ideal choice for education and applications such as circuit simulation tests. Arbitrary waveform generator provides users with 16k memory length. Users can upload basic waveforms, including Sine, Square, Pulse, Ramp, and Noise to edit arbitrary waveforms. Normal and Function Edit can edit waveforms. The edited waveforms can be saved as UAW file for data access.