Hello.
We use the SigCon Architect GUI to set DS250DF810 test Pattern output for 10G/25G test.
We have found PRBS 9 & PRBS 31. But we can't find the 8180 Test Pattern. How do we set up SigCon Architect? Thanks for help~
Dear Nasser.
Good day.
We have two questions that I would like to ask you.
1. 25G return loss fail. Please suggest how we can modify the settings. Please reference on below report.
2. We use user defined pattern to setting generate 8180. But It looks like strange. Please kindly check below attached file and let us know how to setting.
The figure below shows the 8180 Test Pattern example.
SFI Data Rate = 10.3125Gb/s
8180 Data Rate = (10.3125Gb/s) / 8 = 1.2890625 Gb/s
One bit UI= 1/10.3125G = 96.96ps
8180 UI=96.96ps * 8 = 775.68ps
User defined pattern to setting generate 8180
Dear Nasser.
Thanks for your reply.
It seems that 0x97 and 0x7C is read only. We use high level page to setting. Please let us know where to set the wrong.
About the 25G return loss fail. Do you have any suggestion can provide to us.
one more question are we use below setting for our system. But not work. Is anything wrong?
i2c mw 0x18 0xfc 0x01
i2c mw 0x18 0xff 0x01
i2c mw 0x18 0x00 0x04
i2c mw 0x18 0x0a 0x0c
i2c mw 0x18 0x09 0x20
i2c mw 0x18 0x1e 0x99
i2c mw 0x18 0x29 0x20
i2c mw 0x18 0x30 0x09
i2c mw 0x18 0x3d 0x90
i2c mw 0x18 0x3e 0x45
i2c mw 0x18 0x3f 0x00
i2c mw 0x18 0x79 0x30
i2c mw 0x18 0x0a 0x00
Hi AJ,
This is ok. As long as Mask Value is 0xFF you can write into this register. Please ignore read only and write your 8180 settings into these two registers. Please note above.
As it relates to return loss failure, let's please use right data pattern. Then you can fine tune VOD, pre and post curser to optimize return loss.
Regards,,nasser
Dear Nasser.
Thanks for your reply.
I can't change Mask Value to FF. Please teach me how to change it.
Your example is to use the DS250DF410. Is it the same as the DS250DF810? Thanks for kindly help~
Hi AJ,
I believe I know what could be causing this.
There are two ways to get around this:
1). Use a third party I2C controller to write into these registers.
2). Update a couple of SigconArchitect files:
2a). Please go to: C:\Program Files (x86)\Texas Instruments\SigCon Architect EVM GUI\Configurations\DS280DF810
directory and replace Register Map.xml file with attached Register Map.XML.
2b). Open new Register Map.ini and then save(cntl s).
2c). Once you do the above two steps, you should see two files updated: Register Map.xml and Register Map.
3). Next open SigconArchitect and you should be able to see the attached SigconArchitect GUI image.
Regards,,nasser
Register Map.xml
