GW Instek MSO-2102EA 100 MHz, 2-Ch. Digital Storage Oscilloscope
100 MHz bandwidth
Equipped with a 16-Channel Logic Analyzer and a dual channel 25 MHz arbitrary waveform generator
Real time sample rate for each channel is 1GSa/s
Free Frequency Response Analyzer Software (Download from manufacture website only)
Maximum 10M memory depth and VPO waveform display technology
Waveform update rate up to 120,000 wfms/s
8" WVGA TFT LCD screen display
Maximum 1M FFT provides higher frequency domain resolution measurements
High Pass, Low Pass and Band Pass Filter Functions
29,000 segmented memory sections and waveform search function
I2C/SPI/UART/CAN/LIN serial bus trigger and decoding functions
Data log function is able to track signal changes up to 100 hours
Network storage function
Window technology in frequency domain of oscilloscope
The FFT function of oscilloscope USES window technology to reduce the influence of spectrum leakage.Before executing the DFT, the DFT frame is multiplied by a window function of the same length for each sample.Window functions are usually bell-shaped and reduce or eliminate discontinuities at both ends of the DFT frame.
The four most commonly used window functions are listed below for recommended purposes:
(1) Rectangle - measures a sudden transient signal in which the signal level before and after the event is almost equal
(2) Hamming – measurement of sinusoidal, periodic, or narrow-band random noise, where the signal level before and after the event is significantly different
(3) Hanning - measuring amplitude accuracy (low at analytical frequency) with significantly different levels of transient or burst signals before and after an event
(4) Blackman/Harris - measure frequency amplitude, measure waveform with single frequency, search for higher harmonics
Digital oscilloscope automatic verification system
With the development of electronic technology, digital oscilloscope with the digital technology and software greatly expanded the ability to work, the early products of low sampling rate, there is a big dead zone time, less than be improved screen refresh rate low, difficult to observe before modulation signal, communication eye diagram, such as composite video signal is more and more easy to observe. Digital oscilloscope can calculate and analyze data, which is especially suitable for capturing all details and abnormal phenomena in complex dynamic signal.In order to make the oscilloscope work in a qualified state, it is an urgent task for the test engineer to verify the oscilloscope regularly, quickly and comprehensively and to ensure the traceability of its value.
Manual verification is inefficient and prone to errors. The verification of each oscilloscope requires the test engineer to read a lot of data.The automatic test system has the characteristics of accurately and quickly measuring parameters, intuitively displaying test results, automatically storing test data and so on.It will be the trend of instrument verification to realize program control verification of oscilloscope with automatic test system.
GPIB, VXI and PXI are the standard buses of automatic test system. GPIB has won the recognition of users for its stable performance, convenient operation and low price.Here, GPIB is selected as the bus of the test system.
The hardware of automatic verification system of digital oscilloscope based on GPIB is composed of GPIB controller, FLUKE5500A, verified digital oscilloscope, PC and printer