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ONET-10G-EVM: Some question about selecting sfp+ breakout board

Part Number: ONET-10G-EVM

Hello, I've got some question about the SFP+ breakout board.

I've a ZR type sfp+ and I'd like to track the receiving optic power, so I think the RSSI feature on ONET-10G_EVM would be helpful.  Here are my question:

1) Is the ONET-10G-EVM LR compatible with SFP+ ZR type? which is a type sfp+ allow signal transmitting up to 80km.

2) Regarding to the rssi signal, how fast the signal can i get(frequency)? is it real time?

3) Is there any other device needed other than onet-10g-evm for my purpose? I'm going to purchase a set if necessary.

Thank you very much!

  • Hello Kai,

    The ONET-10G-EVM is set up for an SFP+ module, but I am not sure if it supports the ZR type. 

    The RSSI signal is derived from the photo diode biasing circuit, which is fundamentally a DC circuit.  It is real time, however, the response time is on the order of tens to hundreds of microseconds because the servo loop for the diode bias must not cancel out signal frequencies above 100kHz.    The RSSI signal reflects the total optical power in the diode. 


    Our ONET-10G-EVM does not include the ROSA and TOSA units. 

    Regards,

    Loren

  • Hello Kai,

    The following is from Wikipedia:

    10GBASE-ZR

    Several manufacturers have introduced 80 km (50 mi) range ER pluggable interfaces under the name 10GBASE-ZR. This 80 km PHY is not specified within the IEEE 802.3ae standard and manufacturers have created their own specifications based upon the 80 km PHY described in the OC-192/STM-64 SDH/SONET specifications.[27]

    Our EVM does not handle the optical interface, so as long as the pinout of your module is compatible with you should be OK.

    Regards,

    Loren