MULTILANE ML 4015D User Manual Download Page 4

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INTRODUCTION

Acronym

Definition

Bandwidth

NRZ

Non-Return to Zero

DUT

Device Under Test

SONET

Synchronous Optical Networking

SOC

System on a Chip

PCIe

Peripheral Component Interconnect Express

SATA

Serial Advanced Technology Attachment

PAM4

Pulse Amplitude Modulation

ORR

12G Wideband Optical Reference Receiver

Sim

Simulation

Conf

Configuration

PRD

Product Requirements Document

HW, FW, SW

Hardware, Firmware, Software

Radio Frequency

Gbps

Gigabits per second

PC Mode

Pattern Capture Mode

GUI

Graphical User Interface

THD

Total Harmonic Distortions

Summary of Contents for ML 4015D

Page 1: ...USER MANUAL Digital Sampling Oscilloscope User Manual User Manual Revision 1 0 July 2020 Firmware Revision 3 2 GUI Revision 2 0 9 Connection Installation Calibration Measurement Troubleshooting...

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: ...uite 7 Target Applications 8 Product Software 9 Minimum PC Requirements 9 Installation 10 System Start up 10 DSO GUI Overview 11 DSO Configuration 12 DSO Menu 14 Status Bar 18 Oscilloscope Measurement...

Page 4: ...Interconnect Express SATA Serial Advanced Technology Attachment PAM4 Pulse Amplitude Modulation ORR 12G Wideband Optical Reference Receiver Sim Simulation Conf Configuration PRD Product Requirements D...

Page 5: ...uirements Parameter Symbol Conditions Min Typ Max Units Current from 5 V Supply External 1 5 A The typical power dissipation for the DSO is 7 5 W the module can be powered from an external source 5 V...

Page 6: ...with a specified input BW It is operational under Windows and Linux The DSO implements a statistical under sampling technique with comprehensive software libraries for eye measurement jitter analysis...

Page 7: ...istical captures Load and analyze data that was previously captured in simulation mode Capability to save statistical measurements data files and configurations Color graded display for visualizing ji...

Page 8: ...haracterization Electro optical module testing Electrical stressed eye testing for 100 Gbps Ethernet MLD CAUI application OIF CEI 28G VSR CPPI 4 CAUI 4 32G Fiber Channel chip tomodule c2m High speed S...

Page 9: ...the following specifications Windows XP SP3 or greater Minimum 2 GB RAM 1 Ethernet card to establish connection with the device USB connector Pentium 4 processor 2 0 GHz or greater NET Framework 4 0...

Page 10: ...USB driver to the PC Appendix I Change the IP of the DSO to fit in the network range by and using the software DSO Conf Appendix III Communication through Ethernet port is required for data acquisiti...

Page 11: ...ted on the samecomputer choose the Simulation mode 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 isrun...

Page 12: ...MHz for certain models Choose the Normal Operation radio button to use the onboard timing generator Enter the target line rate less Line Rate Gbps into the Gbit Rate field or choose a Gbps value examp...

Page 13: ...e attenuator is at 3 dB In electrical mode this is 6 dB To capture more points for finer measurements accumulate the number of points from all the acquisitions by entering the total number of points t...

Page 14: ...tion is suggested Reducing the number of blocks to less than 128 significantly reduces the effect of wander and increases throughput Figure 5 Wander Compensation DSO Menu Figure 6 DSO menu bar File Me...

Page 15: ...ontent 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 can be done using the mouse wheel when the Ctrl bu...

Page 16: ...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 7 Supported DSO GUI Operat...

Page 17: ...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 18: ...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 19: ...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 20: ...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 21: ...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 22: ...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 23: ...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 24: ...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 25: ...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 26: ...cal converter within the scope Outer OMA The outer OMA Optical Modulation Amplitude depicts the difference between the power levels of the highest logic level 11 in PAM4 and the lowest logic level 00...

Page 27: ...covering the optimal taps for improving an NRZ or PAM4 signal The filtering GUI can be used to adaptively detect the minimum number of FFE or DFE taps required to reach a target Eye Height or SNR Thes...

Page 28: ...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 Heigh...

Page 29: ...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 30: ...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 31: ...cuit as follows 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...

Page 32: ...32 Go to S Parameter Setup Figure 12 S Param setup Select the DSO Connected After selecting the DSO click New Setup Figure 13 Setup Create Your Main Circuit Figure 14 Main Circuit...

Page 33: ...sed to calculate the S parameters of the DAC DUT Figure 15 Main circuit component Proceed by clicking Done Select Components from Main Circuit Present in Reference Circuit Select Cables 1 and 2 and cl...

Page 34: ...n 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 t...

Page 35: ...35 Click Next Frequency Domain Mode Upon moving to frequency domain mode the frequency response can be plotted and the total harmonic distortions can be calculated...

Page 36: ...ncel or close Go to the device manager via a right click on My Computer o Click on Manage o Click on Device Manager Right click on the top level tab MultiLane PC and select Scan for hardware changes F...

Page 37: ...sible Appendix II How to connect this instrument The ML DSO has 2 connection ports USB for configuring Ethernet IP and fast Ethernet USB Cable Connection The USB port is only used to configure the IP...

Page 38: ...ical Reference Receiver filter is specified by selecting a certain frequency cutoff percentage of the bitrate see the following examples 75 of 25 Gbaud for legacy NRZ signals 50 of 26 Gbaud and 53 Gba...

Page 39: ...rted by the ML DSO in order to maximize frequency reach 1 Using a ML MATLAB program figure below the end user can capture and save a csv waveform using the reference instrument with SIRC enabled Figur...

Page 40: ...ent points Note that an incorrect implementation of this feature can negatively affect measurement accuracy Some examples will follow This feature is advantageous during mask testing as the mask hits...

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