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Honored ContributorGXB:tranceiver transmission time issue
Hi dears: I have a board which has two same FPGA. Each FPGA has one transmitter. These two FPGA are configured with same configuration file. I use aonther board which has only one FPGA to recei...
Altera_ForumHonored Contributor
Honored ContributorI attached two STP files, which save my test results. These two STP files, one is of ArriaGX, transmitter, another is of StratixIVGX, the receiver. Because i only have one transmiter board, and two ArriaGX chips on single transmitter board chained in one daisy chain, so i can only monitor one ArriaGX at the same time.
The test, i did, force the second ArriaGX send data later than the first one for 2 clock cycles. Total 100000 datas are sent. I analyze the data after the receiver board save it in disk, and found there is one pair events received with time disorder. This time disorder can be found in the receiver's STP file. The second arriaGX data arrive at SIVGX later than the first arriaGX except the 14th event, which can be found at the time bar position of the STP. This seems that the offset between two different GXB isn't a constant value after power-on. It act as mostly like "jitter". Another attachment JPG files show the first event and the "issue" event.
