Optical analyzer conducts in-service PMD tests
Test & Measurement World Staff - August 15, 2012
Deployed on the JDSU T-BERD/MTS-8000 field test platform, the I-PMD analyzer allows network operators to perform PMD (polarization mode dispersion) measurements without disrupting service. The nonintrusive technique employed by the analyzer measures PMD inside live traffic streams—without suspending voice, video, and data services—by using the transmission DWDM channels. It can be used to troubleshoot the faulty channels of 10G/40G transmission systems and qualify DWDM and ROADM networks for future upgrading to 100G.
The I-PMD integrates three instruments into one: a PMD analyzer, a high-resolution OSA (optical spectrum analyzer), and an in-band OSA. In addition to monitoring a live network, the I-PMD captures five optical measurements in a single snapshot, including total PMD, differential group delay per channel, power level, frequency, and in-band optical signal-to-noise ratio. The single-ended instrument requires only one technician, has no impact on network services, and minimizes the resources needed to perform verification tests.