IQS-5240S-P/BP - optical spectrum analyzers

Highly accurate, easy-to-use intelligent optical spectrum analyzers (OSAs) for current and next-generation networks.

Key features:-

  • Pol-Mux OSNR measurement capability for 40G and 100G coherent signals, compliant with the current draft of the IEC 61282-12 standard
  • Flexibility to analyze WDMs, EDFAs, drift, spectral transmittance, FP and DFB lasers
  • Automatic impairment identification for faster troubleshooting
  • Compliant with Recommendation ITU-T G.697
  • Fast, accurate scans—no compromise on dynamic range or resolution bandwidth
  • GPIB or LAN remote control using SCPI commands
  • One-button operation for easy setup and automatic measurement

Unique Pol-Mux OSNR measurement technology

OSNR has long been recognized as a key performance indicator in wavelength-division multiplexing (WDM) networks, because it provides a multichannel assessment of signal quality in a very short period of time. In addition, OSNR can predict bit error rate (BER) within just a few minutes, while typical BER tests must run for hours or days.

The IEC 61280-2-9 standard defines OSNR measurement as the power ratio between the signal power and the noise at half the distance between the peaks. However, in ROADM or 40 Gbit/s systems, this method may lead to incorrect results, because the noise level between the peaks is no longer directly correlated with the noise level at the channel wavelength. EXFO’s in-band OSNR is the answer to this challenge.

For Pol-Mux signals at 40G and 100G, neither the IEC nor the in-band method work. This calls for a new measurement method: Pol-Mux OSNR.

First Pol-Mux OSA on the market

EXFO’s Pol-Mux OSA is the first third-party instrument for Pol-Mux OSNR measurements that is not limited to any specific system vendor. The new commissioning assistant, which is the key feature of the new Pol-Mux OSA, is perfect for Pol-Mux OSNR measurements during turn-up. Based on the channel shutdown method, it provides highly accurate amplified spontaneous emission (ASE) OSNR measurements.

The commissioning assistant can be utilized after the user has first taken a measurement at the receiver with all of the channels turned on, and then acquired a series of traces, each taken with one channel turned off. The Pol-Mux OSA then performs the Pol-Mux OSNR calculations via a user-friendly wizard.

The commissioning assistant therefore greatly accelerates OSNR measurements based on the channel shutdown method, and drastically reduces potential human errors. In addition, two standards-compliant calculation approaches are available in the commissioning assistant: one compliant with the IEC-61282-12 standard (under revision), and the other compliant with the China Communications Standards Association (CCSA) method YD/T 2147-2010.

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