3
Introduction
The WDM900 is a rugged, portable and easy-to-use optical test set that simplies in-service testing of
live DWDM and CWDM networks. Two different models of WDM900 are available.
• WDM900-40 – designed for commissioning, testing and troubleshooting of DWDM Access/Metro
network links.
In this User’s Guide, WDM900-40 model will be referred to as (-40 ) .
• WDM900-60 – designed for commissioning, testing and troubleshooting of CWDM and DWDM
Access/Metro network links.
In this User’s Guide, WDM900-60 model will be referred to as (-60 ) .
The WDM900 acquires the network signal, measures the characteristics of each CWDM/DWDM
channel present and determines which signals satisfy user-dened limits for channel power,
wavelength deviation, optical signal-to-noise ratio and other indications of network and signal
integrity. Optical signal-to-noise ratio measurements are consistent with the IEC 61280-2-9
specication. The Health Meter graphically summarizes network performance via an easy to interpret
color-coded indicator for each channel. Simply touching a non-conforming channel launches the
Channel Detail display, which shows graphically and numerically how measured attributes compare to
the acceptance criteria. Within just seconds of connecting to a network port, WDM900 users know the
status of each channel, which channels require attention and exactly what action is required.
The WDM900’s innovative Health Meter is protected by US Patent # 9,515,726.
A comprehensive reporting application provides one-touch capture and reporting capabilities. Reports
are easily managed using time stamps, report titles, keywords/keyword search and tagging. Reports
are easily exported in .pdf and .csv formats via off-the-shelf USB memory sticks.
The WDM900 is engineered to perform under the harsh conditions typically found in a central ofce,
headend, network node and other outside plant locations. Its highly-integrated solid state design
features a hermetically-sealed optical path and no moving parts. An internal wavelength reference
and temperature-stabilized measurement circuits eliminate long warm-up periods and accuracy drifts
induced by sudden temperature and humidity changes. The WDM900 is the only portable WDM
measurement system that satises Telcordia GR-2952-CORE environmental specications.
