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12 

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

 

 

Click on the hardware radio button to use the instrument; fill in IP and Channel 

Data Configuration 

The DSO has 3 SMA inputs (two for the differential data RF Input + and RF Input 

, and one 

for the Clock input). 

External Clock Operation 

Clock Input in normal mode ranges between 5 and 525 MHz (710 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, 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 512 

Each packet consists of 512 sample points per UI, which are duplicated when drawing the eye. 

Eg: 256 packets correspond to 131072 points per pattern, and 262144 points per eye (131072 
for each of the 2 UIs displayed in eye mode). 

 

 

 

 

 

 

 

 

Figure 4. DSO Configuration 

 

Enter the percentage level of rising and falling times in the 

NRZ Thresholds

 field 

 

Enter the 

External Reference Clock Frequency

 in MHz or as a factor of the bit rate 

Содержание ML 4015D

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 41: ...21 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 63...

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