Hi, I am simulating a traveling wave IQ modulator and I have a problem with the calculation of BER. I just realized that a part of the received data is not correct.
The below figures are showing the received data and reference date generated by PSRBS element, as it can be seen for a period of time received data are not correct.
It should be noted that this part happens at different times for I and Q signals.
For now, I am using ignore options in EYE and VSA elements and ignore nearly half of the periods to make sure that part is not affecting my results. If I don’t use ignore options, my resulted eye diagrams would be like the following figure and my measured BER would be affected by the lines at the zero level.
I am attaching my file here:
IQ_60Gb_SPB8_SL2048_Test.icp (7.0 MB)
I will appreciate if anyone can help!