Forum Replies Created

    June 29, 2015 at 3:50 pm #21997
    Profile Photo
    Maciej Nowacki
    Participant

    Yes but for layout 3 and optical fiber lenght of 220 km. I have BER around 2.30 e^-45. I think that it is too good BER.Do you share my opinion ?

    June 27, 2015 at 7:49 am #21965
    Profile Photo
    Maciej Nowacki
    Participant

    I have posted file with 3 layouts. All different layouts have problem with BER analyzer.

    Thanks very much!

    June 25, 2015 at 12:50 pm #21918
    Profile Photo
    Maciej Nowacki
    Participant

    Not exactly. I think that BER Analyzer gives too good results. I got BER about e-30 for 200 km long link.

    June 25, 2015 at 11:10 am #21912
    Profile Photo
    Maciej Nowacki
    Participant

    Do you know where should I look for problem ? Previously I had BER analyzer but I got BER about e-30 for 200km link. Should I look for problem in BER test or in system ?

    June 24, 2015 at 1:35 pm #21891
    Profile Photo
    Maciej Nowacki
    Participant

    I have made it but my system works up to 1,2 km. Am I right that it is too short ? Dispersion destroys my signal very much.

    June 22, 2015 at 3:46 pm #21868
    Profile Photo
    Maciej Nowacki
    Participant

    My BER test set still doesn’t work. Could you give me a hint where the problem is ? Whole system is working but BER doesn’t show anything.

    June 21, 2015 at 5:41 am #21834
    Profile Photo
    Maciej Nowacki
    Participant

    Hello

    Do you have any samples using BER test set(analog system) ? I have used BER test in my project but It doesn’t work. Could you look into my project ?

    June 20, 2015 at 11:12 am #21826
    Profile Photo
    Maciej Nowacki
    Participant

    This is my graph showing dependency between length and BER.

    June 20, 2015 at 4:28 am #21823
    Profile Photo
    Maciej Nowacki
    Participant

    Yes but I set optical fiber length to 160 km. I got very bad graph of constellation and very good BER (about 10^-30).

    June 18, 2015 at 4:07 pm #21805
    Profile Photo
    Maciej Nowacki
    Participant

    I think that my BER is too good. I have attached my project.

    June 18, 2015 at 2:04 pm #21800
    Profile Photo
    Maciej Nowacki
    Participant

    Yes, thanks 🙂 but I have one more problem. I have been trying measure BER but my BER analyser doesn’t work. Could you help me in that problem ?

    June 18, 2015 at 11:08 am #21798
    Profile Photo
    Maciej Nowacki
    Participant

    Hello

    The highest frequency that I can get is about 300 MHz.

    June 4, 2015 at 7:01 am #21382
    Profile Photo
    Maciej Nowacki
    Participant

    Hello,

    Thanks Damian! You have big beer on me. But I have one more question. I have been trying to measure BER but my system doesn’t work. I got very wird results. Could you help me ? I have been trying change place of BER analyzer to everywhere but it doesn’t work.

    Cheers

    June 1, 2015 at 3:39 pm #21294
    Profile Photo
    Maciej Nowacki
    Participant

    Hello
    I’m using Optiwave 13 but I’m doing the simplest version of ROF with QPSK. It’s only for seminar at university.
    Could you help me how to figure out problems with my example ?