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Презентация PowerPoint · however this will not reset the clock. To reset the clock time...
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REV 1.1 EBERT 1504 Pulse Pattern Generator and Error Detector User Manual
Transcript of Презентация PowerPoint · however this will not reset the clock. To reset the clock time...
REV 1.1
EBERT 1504
Pulse Pattern Generator
and Error Detector
User Manual
www.esoreng.com
1504 KEY FEATURES
• Four channel NRZ Pulse Pattern Generator and Error Detector
• Wide operating range between 1 to 15 Gb/s and beyond
• Typical JRMS of 1 ps and JPP of 7 ps
• PRBS patterns of 2^7, 9, 15, 23, 31 and 58 and error insertion
• Non-destructive eye monitor for ≥ 8.5 Gb/s operation
• Adjustable internal clock synthesizer with PPM offset control
• Adjustable clock output frequency and amplitude
• External clock input to synchronize parallel test systems
• Adjustable 25 to 1500 mV PPDIFF output with squelch
• Adjustable Pre and Post cursor emphasis control
• TX and RX polarity inversion
• Loss of signal indicator
• 64 bit programmable fixed pattern
• USB 2.0 controlled with API command set or GUI software
• Stand alone configuration options available (consult the factory)
• Small footprint size of 216w x 51h x 127d mm
• Integrated cooling fan
• 1 year warranty
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EBERT 1504 INTERFACE
Clock In and Out
Four TX and RX Channels
Status LED
USB Port
Fan Inlet
DC Power Connector
Power Good LED
ON/OFF Switch
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USB DRIVER INSTALLATION – PAGE 1 OF 4
The 1504 system will be shipped with a USB drive that contains the documentation needed to set-up the EBERT 1504 system on a windows based computer per the screen shot below using windows explorer:
You will see the user manual, datasheet and product brief in the main directory. One folder contains the USB driver and the SetupEBERT1504.msi is the GUI installation file. Copy the files from the USB drive over to the computers main drive. Per this example, create a new folder under the main drive called 1504 where you can copy the files into per this example C:\EBERT1504.
The USB driver software will connect the EBERT 1504 system onto the COM port for ease of integration into older legacy software systems.
Plug the USB cable between the computer and the EBERT 1504 test system. Then plug the power cord from an AC outlet and the EBERT 1504 test system. Then locate the power button on the back faceplate and turn the system on.
You will see the back LED turn green to let you know that main power is applied and the front LED will give you the status of the system, Upon turning on, the LED will be orange for 15 seconds to let you know that is going through its initialization sequence. Once completed it will then turn green to let you know that is ready to operate.
Now connect the USB cable between the computer and the EBERT 1504 system. Windows will recognize the new connection and will typically display the new hardware found wizard per the next screen shot.
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USB DRIVER INSTALLATION – PAGE 2 OF 4
Click on “No, not this time” radio button and then click next.
Click on “Install from a list or specific location” radio button and then click next.
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USB DRIVER INSTALLATION – PAGE 3 OF 4
Now click on the browse button and navigate to the folder called C:\EBERT1504 \USB to Virtual COM Port Driver and then click next.
You might get this warning however click the button “Continue Anyway”
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USB DRIVER INSTALLATION – PAGE 4 OF 4
The Hardware Wizard will complete and then click on the finish button.
A pop-up window will be displayed showing that the hardware is installed and ready to use.
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GUI SOFTWARE INSTALLATION – PAGE 1 OF 4
Now that hardware is set-up onto the system, the GUI software can be installed. Using Windows Explorer, navigate to the following directory C:\EBERT1504 and click on the file called SetupEBERT1504.msi. You should get the following display showing onto your computer to start the software installation process. Click next to start the installation.
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GUI SOFTWARE INSTALLATION – PAGE 2 OF 4
The display will suggest a proper location to install the software however you can navigate to a different directory of your choice. Once you have located a directly or created on then click next.
The following display will be shown to confirm the start of installation so click on the next button.
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GUI SOFTWARE INSTALLATION – PAGE 3 OF 4
The display will show the progress of the installation process and then will give you a status of its completion. Click on close to exit the installation software GUI.
The software installation program will create the application exe file under "C:\Program Files (x86)\ESOR Engineering\EBERT1504" for a 64 bit PC or C:\Program Files\ESOR Engineering\EBERT1504 for 32 bit PC.
Using Windows Explorer, go to the proper directory and locate the file called EBERT 1504.exe. Right click on the file name, click on Send To and then click on Desktop (create shortcut).
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GUI SOFTWARE INSTALLATION – PAGE 4 OF 4
The following ICON will now be on your desktop and you can double click the ICON to start the GUI software. Once you double click on the EBERT 1504 ICON then the following control GUI will appear.
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EBERT 1504 – ESTABLISH CONNECTION
1. Select the proper com port from the pull down menu, might be various com ports on a computer (hint – unplug and plug the USB cable to figure out which com port the 1504 has been assigned)
2. Press the connect button , this will establish a communication link through the USB port and initialize the 1504
3. Connection status display will turn green after initialization, this will take about 15 seconds
4. Press the ping/identify button to blink the front panel LED 5 times if more than one system is being used to avoid confusion, multiple GUI interfaces can be used in parallel on a computer however only one GUI per system
5. Press the disconnect button when finished with the GUI
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EBERT 1504 MAIN CONTROL PANEL
6. Configuration file save and recall along with cable calibration offset button to save time
7. External or internal clock switch – default is internal upon initialization
8. Various control tabs which will be discussed later
9. Clock control features
10. Individual TX control features
11. Individual RX control features
12. Set all TX control features
13. Set all RX control features
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EBERT 1504 FIXED PATTERN CONTROL PANEL
14. TX fixed pattern control tab
15. Select bit width of repeating pattern
16. Click on channel bit position to toggle between a one or a zero
17. Once the pattern is completed then click the appropriate channel button to load the pattern – click clear to reset the bit sequence back to all zeros
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EBERT 1504 EYE DIAGRAM CONTROL PANEL
18. Eye diagram control tab
19. Select channel and step size
20. Select eye size to capture the eye height and width quickly instead of a full scan
21. Select view eye diagram for the contour of the incoming data
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EBERT 1504 EEPROM CONTROL PANEL
22. EEPROM control tab
23. Read firmware version button
24. Read Factory EEPROM contents and fan hour meter
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EXAMPLE OF HOW TO LOOP BACK DATA FOR VERIFICATION TESTING OF A SINGLE CHANNEL
1. Add two SMA cables to a channel and loop them from the TX to the RX maintaining correct polarity.
2. Launch the EBERT 1504 GUI.
3. Select the com port drop down list and record what com ports are already connected to the computer.
4. Connect the USB cable from the EXERT 1504 system to the computer.
5. Using the switch on the back of the panel turn on the system.
6. The front LED will be orange for 15 seconds and then turn green to let you know that its initialized.
7. After the LED turns green, select the com port drop down list and select the new com port number that represent the 1504 system.
8. Now press connect and the system will initialize one more time turning the LED orange and then back to green. The screen will be disabled until the initialization process is completed and then control will be reestablished.
9. Upon initialization, the system is reset to the following conditions. The system clock is set to 10.3125 Gb/s and the trigger is /64 with a amplitude of 500 mVPPDIFF. The TX is set to 2^31 with the outputs squelched. The RX is set to 2^31 with the error detector off. The polarity of the TX and the RX is set to positive. If not using the front panel clock in or out then use SMA termination loads of 50 ohms that were shipped with the system.
10. Now click on the TX squelch check box for the appropriate channel to disable squelch.
11. Now the controls for that channel are enabled and you can choose the output level along with pre-and post emphasis settings. For this example we will select 500 mVPPDIFF and leave the emphasis controls at zero. We will also leave the pattern at 2^31 and positive polarity for this example.
12. Now select the start BER button for the corresponding RX channel that the SMA cables are connected to. You should see the CDR lock button turn green and the bit error count at zero with the timer running.
13. Now select insert single error for the corresponding channel and you will see that error in the count box. Press clear BER to get rid of the single error however this will not reset the clock. To reset the clock time you must press stop and then restart.
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EXAMPLE OF HOW TO MEASURE A TX EYE DIAGRAM
1. Add two SMA cables to a TX channel and connect them to a high speed scope with enough electrical bandwidth to capture an eye diagram. Also if this is a sampling scope then connect another SMA from clock out to the trigger input of the scope. Both the TX and trigger outputs are AC coupled so no external capacitors are needed to avoid CML biasing issues.
2. Launch the EBERT 1504 GUI.
3. Select the com port drop down list and record what com ports are already connected to the computer.
4. Connect the USB cable from the EXERT 1504 system to the computer.
5. Using the switch on the back of the panel turn on the system.
6. The front LED will be orange for 15 seconds and then turn green to let you know that its initialized.
7. After the LED turns green, select the com port drop down list and select the new com port number that represent the 1504 system.
8. Now press connect and the system will initialize one more time turning the LED orange and then back to green. The screen will be disabled until the initialization process is completed and then control will be reestablished.
9. Upon initialization, the system is reset to the following conditions. The system clock is set to 10.3125 Gb/s and the trigger is /64 with a amplitude of 500 mVPPDIFF. The TX is set to 2^31 with the outputs squelched. The polarity of the TX is set to positive. If not using the front panel clock in or out then use SMA termination loads of 50 ohms that were shipped with the system.
10. Now click on the TX squelch check box for the appropriate channel to disable squelch.
11. Now the controls for that channel are enabled and you can choose the output level along with pre-and post emphasis settings. For this example we will select 500 mVPPDIFF and leave the emphasis controls at zero. We will also leave the pattern at 2^31 and positive polarity for this example.
12. Now set the scope to the proper voltage and time settings to capture an eye diagram. Select different amplitudes along with adjusting the emphasis controls to change or optimize the eye diagram.
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EXAMPLE OF HOW TO USE THE RX EYE DIAGRAM PART 1 OF 2
1. Add two SMA cables to a channel and loop them from the TX to the RX maintaining correct polarity.
2. Launch the EBERT 1504 GUI.
3. Select the com port drop down list and record what com ports are already connected to the computer.
4. Connect the USB cable from the EXERT 1504 system to the computer.
5. Using the switch on the back of the panel turn on the system.
6. The front LED will be orange for 15 seconds and then turn green to let you know that its initialized.
7. After the LED turns green, select the com port drop down list and select the new com port number that represent the 1504 system.
8. Now press connect and the system will initialize one more time turning the LED orange and then back to green. The screen will be disabled until the initialization process is completed and then control will be reestablished.
9. Upon initialization, the system is reset to the following conditions. The system clock is set to 10.3125 Gb/s and the trigger is /64 with a amplitude of 500 mVPPDIFF. The TX is set to 2^31 with the outputs squelched. The RX is set to 2^31 with the error detector off. The polarity of the TX and the RX is set to positive. If not using the front panel clock in or out then use SMA termination loads of 50 ohms that were shipped with the system.
10. Now click on the TX squelch check box for the appropriate channel to disable squelch.
11. Now the controls for that channel are enabled and you can choose the output level along with pre-and post emphasis settings. For this example we will select 500 mVPPDIFF and leave the emphasis controls at zero. We will also leave the pattern at 2^31 and positive polarity for this example.
12. A quick BER test will be ran to ensure the cables are connected and the correct ports are being controlled.
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EXAMPLE OF HOW TO USE THE RX EYE DIAGRAM PART 2 OF 2
13. Now select the start BER button for the corresponding RX channel that the SMA cables are connected to. You should see the CDR lock button turn green and the bit error count at zero with the timer running.
14. Now select insert single error for the corresponding channel and you will see that error in the count box. Press clear BER to get rid of the single error however this will not reset the clock. To reset the clock time you must press stop and then restart.
15. Now that traffic has been established now press stop BER test as its not needed anymore.
16. Select the eye diagram tab
17. Within the new display select the proper RX channel that the RF cables are attached to.
18. Now select the step size which is the resolution that the monitor will measure. The lower the step size then the more time it will take the measure the 64X128 array. For this exercise we will select 4.
19. Now click the eye size button, this is a quick routine that finds the center of the eye and measures the voltage and phase opening. It should return a mUI and mV number however if it reports zero then something with the set-up is wrong and needs to be investigated (usually on the wrong TX or RX port).
20. Now click on the view eye diagram button and wait for the eye to be displayed. You will see the front panel LED blink multiple times as data is being transferred back and forth between the GUI and the system. Remember that the system has a limiting amplifier at the RX input for increased sensitivity so the voltage levels won’t correspond to the input voltage however with the use of external attenuators you can get some correlation when operating in the limiting amplifiers linear region of sensitivity. Phase information won’t be effected though.
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EXAMPLE OF HOW TO USE CABLE CALIBRATION FEATURE TO OFFSET SET-UP LOSSES
1. Connect a precision voltage measurement source at the end of a long SMA cable for this example.
2. Set the voltage amplitude for the channel that you are calibrating to the desired voltage level. Also set the frequency of operation as this will also effect the signal voltage amplitude.
3. Measure the voltage output at the end of the SMA cable and record its value. Subtract the GUI setting versus the measurement and this will be your offset voltage. The step resolution of the system is 25 mVPP peak for each channel and 12.5 mVPP for the trigger so you will need to round your offset number up or down.
4. Click on the cable calibration button and a pull down menu will display three other sub-menus called Setup Calibration, Load Calibration and Turn Calibration Off. Now click on the button for Setup Calibration and load in the offsets for each channel and trigger if needed. Now click on save to load the offsets.
5. Click on the Cable Calibration button and then click on Load Calibration to apply the offsets. A new yellow button called Cable Offset On will appear to remind you that the offsets are being applied on top of any command. You can click on the Cable Offset On button at any time to display the channel offsets as a reminder.
6. To turn off the offsets you will need to click on the Cable Calibration button and then click Turn Calibration Off and the yellow button labeled Cable Offset On will disappear.
7. As a side note, Configuration File Load and save will keep the cable offset numbers and status so it can be used to save offsets at different frequencies, TX voltage level settings and DUT configurations to provide flexability.
