4B5B

[KSVParticipant]

Hello all,
I tried to send a 4B5B sequence to fiber. At the receiver I didn’t get the decoded signal after PIn photodiode. Please suggest me some solutions. And can u suggest me some ways to convert the signal form the Photodiode to binary in some way so that I can get the desired output same as the input.

Attachments:

1. 4B5B-1.osd

[Damian MarekParticipant]

Hi Vetrivel,

You don’t need those NRZ I coders so I took them out. I fixed it by setting the Data Recovery component to better options after the encoding to 4B5B the bit rate changes (look at the time domain), so in the Recovery I set it to the correct value (1.25*Bit rate) I also eyeballed the delay and compensated for it in with a couple nanoseconds.

Regards

Attachments:

1. 4B5B-1-DMedit.osd

+1

[KSVParticipant]

Hi Damien,

I replaced the encoder with 8B10B and corrected the bit rate changes. At the receiver I’m not getting the desired signal.

Attachments:

1. 8B10B.osd

[Damian MarekParticipant]

Hey,

Seems like there is a bug with the 8B10B Sequence Generator as it is not modifying the bit rate in a proper fashion. This will be fixed in the next release. Thanks for bringing this to our attention!

[KSVParticipant]

Hey,

I tried with Pseudo Sequence Generator can u check whether the bit rate is changed in a proper way. Thanks in advance.

Attachments:

1. 8B10B1.osd