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Contributor
Contributor
313 Views
Registered: ‎07-25-2018

GTX and GTH linerate(QPLL and CPLL)

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Hi,

I want to send & receive data between KC705 and ZCU102 through Gigabit transceiver via SFP.
1.Built GTX transceiver(X0Y10) with following configuration(KC705)
TX linerate 1.53(QPLL) , RX linerate 0.92(CPLL) and input GTREFCLK1 from SMA(122.88)

2.Built GTH transceiver(X0Y8) with following configuration(ZCU102)
TX linerate 0.92(QPLL0) , RX linerate 1.53(CPLL) and input GTREFCLK1 from SMA(122.88)

i am able to sent data correctly from ZCU102 to KC705.But while sending data from KC705 to ZCU102 some data is missing.
To verify whether problem in KC705 or ZCU102
Built GTH transceiver(X0Y8) with following configuration:
TX linerate 1.536(CPLL) , RX linerate 1.536(CPLL) and input GTREFCLK1 from SMA(122.88).I am able to receive complete data from KC705 board.
TX linerate 0.9216(QPLL0) , RX linerate 1.536(QPLL1) and input GTREFCLK1 from SMA(122.88).I am unable to receive complete data from KC705 board.


Why data is missing in above configuration while sending from KC705 to ZCU102?? problem with QPLL & CPLL??

 

thanks & regards

Pradeep

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1 Solution

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Xilinx Employee
Xilinx Employee
289 Views
Registered: ‎11-29-2007

Re: GTX and GTH linerate(QPLL and CPLL)

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hello, have you tried to run the same test with IBERT? maybe it is simply a missing series decoupling capacitor or a cable connection issue...
A problem with the PLL seems unlikely
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1 Reply
Xilinx Employee
Xilinx Employee
290 Views
Registered: ‎11-29-2007

Re: GTX and GTH linerate(QPLL and CPLL)

Jump to solution
hello, have you tried to run the same test with IBERT? maybe it is simply a missing series decoupling capacitor or a cable connection issue...
A problem with the PLL seems unlikely
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