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GTY Transceiver loopback test

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Visitor
Posts: 9
Registered: ‎12-21-2015

GTY Transceiver loopback test

HI,

 

Generated the GTY Transceiver Example design. Tried to simulate the example design(PMA Loopback) in vivado
simulator vivado 2018.1. i can see the mismatch in the received rx data with tx data. i have attached the 
screenshot of GTY Preset and simulation waveform.  please help me to resolve the issue.

For example.

TX Data = 32'ha7ed0409
RX Data = 32'h4fda0813

Here received rx data is shifted data of tx data. For reference, marked in the screenshot.

Device  : Xilinx XCVU9P-2FSGD2104E Virtex UltraScale +
Tool    : Vivado 2018.1


Thanks,

 

thennavan

gty_transceiver_preset.PNG
gty_tx_rx_data_mismatch.PNG
Xilinx Employee
Posts: 78
Registered: ‎10-19-2011

Re: GTY Transceiver loopback test

Hi @thennavanb,

 

the data shift is expected. You have some latency in the transceiver that you cannot avoid.

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