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FAQs Frequently Asked Questions

If you would like to submit a contribution for posting, please contact us at info@NewRidgeTech.com or visit Contact NRT. 

Click to read the entire FAQs document in a pdf document.
 

PMD FAQs

  1. What is PMD?
  2. Why should I be concerned about PMD?
  3. What is second-order PMD? Is SOPMD important?
  4. How is PMD measured?
  5. What is the difference between a PMD Source and a PMD Emulator?
  6. What are the PMD standards for transponders?
  7. How does the polarization of the light effect the PMD distortion?
     

Product Support FAQs

  1. If I run the program ‘NRT-JPDF’ I only get the image for a fixed JPDF. How can I create
    JPDFs matching situations appropriate for 40 Gb/s?
  2. What is the meaning of 1.2 bit periods in the ‘max DGD’ spec?
  3. What are the DGD and SOPMD ranges for the PMD Sources?
  4. What is the free spectral range of the PMD sources? Where does it come from?
  5. Can NRT-10033A be used to evaluate a 40 Gb/s system?  Or do we need to use the NRT-40133A model?
  6. How do I include the PMD Source into my test set-up?
  7. How do I verify the PMD state generated by the PMD Source?
  8. How do you set the input SOP to maximize the PMD impairment imparted to the optical
    signal?
  9. How do I account for PMD dynamics in tolerance tests?
  10. What SOP rotation speed (setting of the polarization controller) do you recommend for PMD tolerance measurements?
  11. How long should each PMD Source state be measured?
  12. How can I independently adjust the depolarization and PDCD?
  13. The ‘NRT-LVD’ software is not running correctly. What is the problem?
  14. I pressed the RESET on the Galil motor controller and now the PMDS does not respond or
    work. How do I recover?
  15. The PMDS does not run. I get an error message that the NET2888 driver is missing and my computer cannot locate it.
  16. When I start up the PMDS the unit stops at the calibration window and the 5 windows in the right of the calibration window are 0.00.
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