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Summary of Contents for MULTILANE AT4025
- Page 1 AT4025 Digital Sampling Oscilloscope GUI User Manual 4-Lane Electrical Scope | High Sensitivity | Supports 400GAUI PAM4 Transmitter Qualification AT4025 GUI User Manual-rev1.4 (GB 20210405a) April 2021...
- Page 2 Copyright © MultiLane Inc. All rights reserved. Licensed To Avoid Fire or Personal Injury software products are owned by MultiLane Inc. or its suppliers and are protected by United States copyright Use Proper Power Cord. Only use the power cord specified laws and international treaty provisions.
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Page 3: Table Of Contents
CONTENTS CONTENTS ........................3 INTRODUCTION ........................ 4 API and SmarTest Documents ....................4 Product Software ........................5 Minimum PC Requirements .......................... 5 Installation ........................6 System Start-up ........................6 DSO GUI Overview ........................7 DSO Configuration ........................9 Connection Configuration ..........................9 External Clock Operation .......................... -
Page 4: Introduction
INTRODUCTION This is the user operation manual for the AT4025. It covers the installation of its software package and explains how to operate the instrument for pattern generation and error detection; how to control the clocking system, inputs/outputs and all the available measurements. -
Page 5: Product Software
If the Microsoft.NET Framework 3.5 is needed, it can be downloaded through this link: http://download.microsoft.com/download/2/0/e/20e90413-712f-438c-988e- fdaa79a8ac3d/dotnetfx35.exe. For more products 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 specifications: Windows 7 or greater Minimum 1 GB RAM ... -
Page 6: Installation
Installation This section address installation and bring-up of the instrument, addressing the following topics: - System start-up - Connection guide System Start-up To use the DSO under Windows XP, Windows 7 and Vista, it is important that the correct start-up sequence is followed: ... -
Page 7: Dso Gui Overview
DSO GUI Overview Figure 9: GUI Click the connect button at the top left 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 ... - Page 8 If one of the GUI instances is being run on a different PC, choose “Hardware” instead of “Simulation” and enter the “IP” of the PC where the simulator is running Click on the refresh button in order to retrieve the simulator configuration, or configure the DSO by filling the “DSO configuration”...
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Page 9: Dso Configuration
DSO Configuration Connection Configuration Change the configuration as needed: The default display name of the target DSO can be edited as preferred The IP of the DSO connected by writing it next to “IP” label Name the DSO by populating the “Name” label ... -
Page 10: Dso Menu
Typically, this will be rate / 16, 64, or 80, but can be any other rate as well Enter the Pattern Length of the data feeding the DSO to capture the full pattern Note: Incorrect pattern length would still display the eye capture, however full pattern capture is required for certain features of the software such as Jitter Decomposition, PTB and Filters. -
Page 11: Panning
Data: select to save the data file. Measurements: select to save the statistical measurements files. The version for this software can be found after selecting the “About Us” under “help” menu option. Then, the following information will be displayed: Zooming can be done by clicking on the graph and dragging, which would draw a dotted window. -
Page 12: Copy, Save, Undo Zoom And Print A Graph
Copy, Save, Undo Zoom and Print a Graph Right clicking the graph exposes these features: Copy: copy the present graph as an image into clipboard. Save Image As: save the present graph in the desired location. Page Setup: view page information for printing. Print: print the graph. -
Page 13: Eye Measurement Mode
Eye Measurement Mode Regardless of hardware or simulation mode, it is possible to draw the eye and capture measurements after filling the configuration window and connecting to the instrument. In Eye Mode, in order to draw the eye diagram, click on the Start Data Acquisition button Check the Check All button to view all the eye measurements down the screen for one time or select the needed measurement only by pressing on the desired icons. -
Page 14: Status Bar
Status Bar Number of Samples The status bar displays the number of kilo-samples captured in the Eye mode. ‘1K Samples’ is equivalent to 1000 sample points in the Eye graph, including accumulated point when applicable. Operation Status Operation Status Status Description Gathering Data Acquiring data (reading from hardware) Saving Data... -
Page 15: Oscilloscope Measurements
Oscilloscope Measurements While capturing the eye, a user can perform measurements by simply clicking the corresponding buttons: Top, Base, Min, Max, Fall time, Rise time, Peak to Peak, Eye Amplitude, Eye Height, Eye Width, Jitter, and the crossing percentage. The Check All text box can be selected to capture all the measurements in one action. -
Page 16: Measurements
Measurements Measurement Screenshot Description The X and Y histograms show the density Histogram distribution of the samples along the x and y axes: The average y-value of the high-to-high transitions. The average y-value of the low-to-low Base transitions. One and Zero The average y-values at 20% around center of Levels the eye... - Page 17 The maximum sample value. The mean transition time of the data on the downward slope of an eye diagram between 2 defined thresholds e.g. 80% and 20%. Note Fall Time that the percentage level of the rise and falling time can be changed by modifying the NRZ thresholds in the data configuration window.
- Page 18 The difference between top and base of an Voltage eye. Amplitude Eye Height is the vertical opening of the eye measured as the difference between the -3 Eye Height sigma value of the high samples within the NRZ window and the +3 sigma values of the low samples within the NRZ window.
- Page 19 The Deterministic Jitter value is displayed in DJ & RJ picoseconds and the Random Jitter value is displayed in fs. The Switch to Mask Mode button, located between the Eye and Pattern buttons, is used to find the maximum mask margin that results in no more than a specified number or ratio of failing points.
- Page 20 Pattern Capture mode enables the raw bit sequence captured by the DSO to be captured. In order to see the behavior of a specified sequence of bits, zoom in and out by scrolling the mouse wheel, or using the Pattern Capture cursor to specify the region to be zoomed in Mode upon.
- Page 21 This library is a consolidation of all vertical noise measurements including rms and Noise deterministic noise. For an optical DUT signal this will be depicted in Watts. The signal to noise is a ratio of the signal difference between one level and zero level relative to the noise present at both levels.
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Page 22: Multiple Measurements
Signal-to-Noise Distortion Ratio in dB. SNDR is defined by: �� ������ 2 10 × log ) where �� + �� �� 2 �� 2 SNDR maximum value of P(k) which is the linear fit pulse response, �� is the standard deviation ��... -
Page 23: Statistics
Statistics To enable repetitive data acquisition, and statistics measurements, the repetitive mode needs to be checked or the numbers of acquisition in the counter box needs to be increased, then the statistical measurements are shown and the following is displayed: Current value, average minimum, maximum and the standard deviation of each measurement. - Page 24 DFE: The Decision Feedback Equalizer (nonlinear adaptive equalizer) is based on the principle that once the decision circuit has determined the value of the current transmitted symbol, one can precisely remove the ISI contribution of that symbol to future received symbols. Optimal DFE parameters can be determined by the GUI, and it can also adaptively detect minimum taps required for a target Eye Height or SNR value.
- Page 25 Filter Configuration Parameters follow: FFE: 1. The tap delay is expressed as an integer fraction of the bit period. 2. Select the number of taps 3. Tap coefficients: enter the different tap coefficients separated by commas, from tap 0 to tap N. 4.
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Page 26: S Parameter Mode
S Parameter Mode The MultiLane DSO is now capable of measuring insertion loss S-parameters. Depending on how the DSO is connected, the user should be able to measure either of S21 dd, S12 dd, S21, S12, S43, S34, etc. The only difference between all the above is: 1. - Page 27 Two through connectors that can mate the cable pairs together. These connectors will be considered to have negligible insertion loss. MultiLane DSO Any PPG, in this example the MultiLane BERT was used. First, Connect Your Reference Circuit Hardware Begin with connecting the circuit you will use as reference circuit as follows: Connect PPG differentially to Cable Pair 1, to Throughs, to Cable Pair 2, then to the DSO PPG =>...
- Page 28 Figure 12: S-Param setup Select the DSO Connected 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 calculate the S-parameters of the DAC DUT.
- Page 29 Figure 19: Main circuit 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 When done, click next.
- Page 30 Capture Reference Data Click ‘Capture Now’ The captured eye is depicted; the user can accept 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 future when visiting this page, hence avoiding reconnecting the reference circuit.
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Page 31: Frequency Domain Mode
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: How To Change Ip Address And Update Firmware
How to Change IP Address and Update Firmware 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: ML Maintenance GUI USB Driver User Guide... - Page 33 North America Worldwide Asia 48521 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., Houmal, Lebanon Hsinchu City 300, Taiwan (R.O.C) +1 510 573 6388 +961 81 794 455 +886 3 5744 591...
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