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Explorer
Explorer
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Registered: ‎02-22-2010

Using NIDRU to allow GTX support for various protocols

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Firstly, kudos to the developers of NIDRU for their great implementation!

 

I have read xapp1240 and would appreciate if someone could confirm the following:

  1. Can NIDRU be used to pass OC-3 (155.52Mbps) or OC-12 (622.08Mbps) through a Kintex-7 GTX whose reference clock is 156.25MHz?
  2. We are currently using a propietary OC-24c protocol (1244.16Mbps) through a Kintex-7 GTX with a reference clock of 311.04MHz. Can NIDRU be used to pass standard 1000BASE-X (1250Mbps) through the same GTX with 311.04MHz reference clock?

Thanks in advance!

 

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Xilinx Employee
Xilinx Employee
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Registered: ‎11-29-2007

thanks, I will bring your kind words to Paolo ;-)

-- Giovanni

 

 

  1. Can NIDRU be used to pass OC-3 (155.52Mbps) or OC-12 (622.08Mbps) through a Kintex-7 GTX whose reference clock is 156.25MHz?

GG>> yes

 

  1. We are currently using a proprietary OC-24c protocol (1244.16Mbps) through a Kintex-7 GTX with a reference clock of 311.04MHz. Can NIDRU be used to pass standard 1000BASE-X (1250Mbps) through the same GTX with 311.04MHz reference clock?

GG>> yes. You could for example ask to the GTX to oversample the incoming data 4x. this means that the GTX datarate is about 5Gbps or higher. the higher is the sampling rate, the better is the jitter tolerance.

 

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

thanks, I will bring your kind words to Paolo ;-)

-- Giovanni

 

 

  1. Can NIDRU be used to pass OC-3 (155.52Mbps) or OC-12 (622.08Mbps) through a Kintex-7 GTX whose reference clock is 156.25MHz?

GG>> yes

 

  1. We are currently using a proprietary OC-24c protocol (1244.16Mbps) through a Kintex-7 GTX with a reference clock of 311.04MHz. Can NIDRU be used to pass standard 1000BASE-X (1250Mbps) through the same GTX with 311.04MHz reference clock?

GG>> yes. You could for example ask to the GTX to oversample the incoming data 4x. this means that the GTX datarate is about 5Gbps or higher. the higher is the sampling rate, the better is the jitter tolerance.

 

View solution in original post