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AT4025 Digital Sampling Oscilloscope GUI User Manual

AT4025 GUI User Manual-rev1.4 (GB 20210405a)
April 2021

4-Lane Electrical Scope | High Sensitivity | Supports 400GAUI PAM4 Transmitter Qualification

Summary of Contents for AT4025

Page 1: ...AT4025 Digital Sampling Oscilloscope GUI User Manual AT4025 GUI User Manual rev1 4 GB 20210405a April 2021 4 Lane Electrical Scope High Sensitivity Supports 400GAUI PAM4 Transmitter Qualification...

Page 2: ...s While using this product you may need to access other parts of the system Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system To Avoid F...

Page 3: ...DSO Menu 10 File Menu 10 Panning 11 Copy Save Undo Zoom and Print a Graph 12 Operating Modes 12 Eye Measurement Mode 13 Status Bar 14 Number of Samples 14 Operation Status 14 How to add multiple ML D...

Page 4: ...Software GUI Graphical User Interface ATE Automatic Test Equipment HSIO High Speed I O API and SmarTest Documents This manual supports the instrument AT4025 and it is compatible with the Advantest V93...

Page 5: ...ducts updates check the following webpage https multilaneinc com products at4025 Minimum PC Requirements The Windows PC properties for the AT4025 GUI application should meet the following specificatio...

Page 6: ...munication through Ethernet port is required for data acquisition Connect the PC to the AT4000L through an Ethernet cable no driver required Now the DSO is powered up having the right IP the Ethernet...

Page 7: ...t of your screen The Connect to DSO window will pop up Click on the add button to add the virtual DSO The DSO configuration window opens If both software the DSO and simulator are hosted on the sameco...

Page 8: ...enter the IP of the PC where the simulator isrunning Click on the refresh button in order to retrieve the simulator configuration or configure the DSO by filling the DSO configuration window for the r...

Page 9: ...e rate less Line Rate Gbps into the Gbit Rate field or choose a Gbps value example 10 709 10 625 10 3125 9 95328 8 5 6 25 4 25 and 3 125 Specify the number of packets it can be 4 8 16 32 64 128 256 or...

Page 10: ...To capture more points for finer measurements accumulate the number of points from all the acquisitions by entering the total number of points to persist in the accumulate field This will set the num...

Page 11: ...leased the graph will zoom to display only the content within the drawn box This method of zooming may alter aspect ratio of the graph is the drawn box is of disproportional dimensions Zooming also ca...

Page 12: ...the coordinates of points when hovering over them in the graph Un Zoom undo the last zooming performed Undo All Zoom Plan undo reset all zoom actions Operating Modes Figure 12 Supported DSO GUI Operat...

Page 13: ...rements By default the measurements are displayed continuously In this case the eye diagram is frozen after the first acquisition By default Eye Mode is chosen if you are located in Pattern Capture mo...

Page 14: ...irst place Saving Results Saving acquired data points and statistical measurements into their file Displaying Results Showing the statistical measurements and refreshing the graph Acquisition Finished...

Page 15: ...under the Markers group box A pair of movable markers in both X axis and Y axis is displayed The horizontal and vertical markers help bound the measurement region by giving the difference between the...

Page 16: ...s show the density distribution of the samples along the x and y axes Top The average y value of the high to high transitions Base The average y value of the low to low transitions One and Zero Levels...

Page 17: ...Z thresholds in the data configuration window Rise Time The mean transition time of the data on the upward slope of an eye diagram between 2 defined thresholds e g 20 and 80 Peak to Peak The differenc...

Page 18: ...efined as a measure of the short term variations of the significant instances of a digital signal from its ideal position on the time axis In other words ideally an edge should always land at the same...

Page 19: ...oints in total Setting the margin above this level would result in fewer failing points The DSO has the following standard masks 100Gbase SR LR STM 1 STM 4 STM 16 Gb Ethernet Fiber Channel 1x Fiber Ch...

Page 20: ...dulation PAM4 is a form of signal modulation where the message information is encoded to one of 4 amplitude levels Unlike NRZ which varies between 2 amplitude levels indicating zero and one PAM 4 vari...

Page 21: ...as 20 log Note AV is the eye amplitude and V is the eye height in PAM4 mode Eye Skews Ratio Level Mismatch is a measure of linearity in a PAM4 signal This measurement is defined by the IEEE as a metr...

Page 22: ...from the mean voltage at a fixed point in a run of at least 8 consecutive identical levels Outer VMA The outer VMA Voltage Modulation Amplitude depicts the difference between the power levels of the h...

Page 23: ...ght or SNR These filters can be applied to a DUT signal with or without introducing the preserve noise feature which compensates for the filter side effect of reducing signal noise of adjacent measure...

Page 24: ...ch value of the output sequence is a weighted sum of the most recent input values Optimal FFE parameters can be determined by the software and it can also adaptively detect minimum taps required for a...

Page 25: ...if taps were generated automatically they would already be normalized sum 1 DFE 1 With DFE tap delay is always fixed to 1 tap per bit 2 Tap coefficients Enter the different tap coefficients separated...

Page 26: ...nded b Maximum bit rate possible For maximum frequency range in the result c Cleanest possible Eye This sometimes translates to maximum amplitude to maximize SNR However be careful not to exceed the m...

Page 27: ...ows Connect PPG differentially to Cable Pair 1 to Throughs to Cable Pair 2 then to the DSO PPG Cables 1 Through Cables 2 DSO Step 2 Configure your PPG for Cleanest Signal 1 Setup your PPG Kindly refer...

Page 28: ...onnected After selecting the DSO click New Setup Figure 17 Setup Create Your Main Circuit Figure 18 Main Circuit Add the Main Circuit Components Load the S parameters of the MCBs These will be used to...

Page 29: ...ircuit component Proceed by clicking Done Select Components from Main Circuit Present in Reference Circuit Select Cables 1 and 2 and click Next Add Through Connector in Reference Circuit Definition Wh...

Page 30: ...ept it or recapture Alternatively the user may Accept and Save the reference eye data This will save the captured reference data for future use allowing the user to call on Load from RefCirc in the fu...

Page 31: ...31 Frequency Domain Mode Upon moving to frequency domain mode the frequency response can be plotted and the total harmonic distortions can be calculated...

Page 32: ...irmware For info regarding changing IP address and updating firmware of the AT4025 kindly download Maintenance folder from https multilaneinc com products at4025 The folder consists of the following M...

Page 33: ...521 Warm Springs Blvd Suite 310 Houmal Technology Park 14F 5 Rm 5 14F No 295 Fremont CA 94539 Askarieh Main Road Sec 2 Guangfu Rd East Dist USA Houmal Lebanon Hsinchu City 300 Taiwan R O C 1 510 573 6...

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