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TIDA-00725: OTDR specifications

ankur kumar
Prodigy 40 points
Part Number: TIDA-00725

We are interested in TI’s developed OTDR solution TIDA-00725. We have gone through the document TIDUAZ1 but we have not been able to find the following basic and important OTDR parameters.  Kindly let us know what values of these parameters you have been able to achieve with your solution

  • Max fiber length that could be tested
  • Distance accuracy in locating the fault
  • Min and max Sampling resolution
  • Event dead zone
  • Attenuation dead zone
  • 0
    TI__Expert 3620 points

    Hi Ankur,

    This reference design is a proof of concept intended to aid you in your design process. It is not fully characterized in the same manner as commercially available measurement equipment.

    Best,

    Sam

  • 0 in reply to Sam Burnett
    Prodigy 40 points

    As per the document TIDA-00725, computations(averaging of samples) have been done on PC but we would be using a microcontroller/microprocessor for this purpose.

    1) Pl suggest us one which would be able to handle these computations and can interface with a LCD display.

    2) Or, Would you suggest doing these computations in the FPGA's DSP block.

  • 0 in reply to ankur kumar
    TI__Expert 3620 points

    Hi Ankur,

    I'm forwarding this thread over to our embedded experts, they should be able to help you with a MCU solution.

    Best,

    Sam

  • 0 in reply to Sam Burnett
    TI__Mastermind 43365 points

    Hello Ankur,

    I am wondering if you could please provide us with more information on your requirements. From the processor perspective, what IPs are you looking for and what type of functionality are you looking for? Are you planning on running Linux or RTOS? 

    Regards,
    Krunal

  • 0 in reply to Sam Burnett
    Prodigy 40 points

    Could you at least let me know how long fiber can be tested with this design?

  • 0
    Prodigy 40 points

    I am trying to rephrase my question to make it more relevant to you.

    How many samples from ADC have been collected per pulse launched into the fiber?  And then how many such pulse repetitions have been averaged to show the results as given in figure 33 on page 28 of the above document i.e. TIDUAZ1.

  • 0 in reply to ankur kumar
    TI__Guru* 92105 points

    Hello Ankur,

    Krunal and I are from the processors team. Since it sounds like you are no longer asking about the microprocessor side of the design, we are going to send your thread back to the ADC team to see if they can give you more details about the TI Design.

    Regards,

    Nick

  • 0 in reply to ankur kumar
    TI__Expert 3620 points

    Hi Ankur,

    The design was tested with 2 1km fiber cables. Sampling and averaging capabilities are described in section 2.4:

    Best,

    Sam