JDSU T-BERD MTS-4000 w/ COSA-4055 Optical Spectrum Analyzer

JDSU T-BERD MTS-4000 w/ COSA-4055 Optical Spectrum Analyzer


JDSU T-BERD 4000 Multiple Services Test Platform

The JDSU T-BERD MTS-4000 offers the first multi-test platform that addresses the complete requirements of field service technicians entrusted with the installation and maintenance of leading-edge fiber- and copper-based digital subscriber line (DSL) access networks and triple-play services.

The T-BERD MTS-4000 gives service providers the power of a single instrument that provides complete triple-play access network and services testing, thus dramatically improving productivity. This one tool lets technicians complete service calls faster with fewer call-backs (repeats), because it quickly identifies the causes of nearly every possible problem. The modular design of the tester enables maximum flexibility and upgradeability and seamless support for future requirements and new testing capabilities, which provides continuous return on investment (RoI).

The lightweight T-BERD MTS-4000 features a wide 7-inch color display with a touchscreen option that lets technicians easily view an actual Internet Protocol television (IPTV) stream, web browser, or complex test results, such as an optical time domain reflectometry (OTDR) trace or spectrum analysis waveform analysis.

Its unprecedented connectivity capabilities give the T-BERD/MTS-4000 platform more uses than other test equipment with features and functionalities, such as remote assistance, remote control, testing automation, and wireless connection, making it an ideal companion in the field.


COSA-4055 Optical Spectrum Analyzer

The COSA-4055  is the smallest CWDM optical spectrum analyzer (OSA) on the market. The COSA-4055 module for the T-BERD MTS-2000, -4000 V2 and -5800 and OneAdvisor-800 platforms offers the functionality and speed of an OSA in a handheld form factor at a fraction of the price of a traditional OSA. It is an ideal test tool for service providers to install, maintain and upgrade metro/access links and CWDM systems. It measures wavelengths and power levels of CWDM channels and displays the complete spectrum.

The COSA-4055 module offers a new generation of coarse wavelength division multiplexer (CWDM) analyzers. Until now, large and expensive optical spectrum analyzers (OSA) were used to precisely test wavelength and power levels in CWDM networks, and optical channel checkers were used to verify optical channel presence. The Viavi COSA-4055 module offers the functionality and speed of an OSA in a handheld form factor at a fraction of the price.

The ITU-T G.695 recommendation promotes vendor interoperability by specifying transmitter/multiplexer characteristics at one end of the CWDM link and the demultiplexer/receiver at the other end. ITU-T G694.2 recommendation specifies the spectral grid for CWDM applications with 18 channels from 1271 to 1611 nm, with a 20 nm channel spacing. To guarantee multivendor compatibility it is important to verify the optical interface parameters according to these recommendations. The COSA-4055 is the ideal tool for checking the critical parameters such as Tx output power and Rx input power and the central wavelengths when installing, commissioning, and troubleshooting CWDM networks as well as for ensuring interface compatibility with different vendors.

In CWDM networks, transmitter lasers are not equipped with a cooling system, thus temperature variations can cause a drift of the central wavelength and the power level. Every channel wavelength must be checked to verify possible wavelength shifts or power loss. The COSA-4055 module can determine the compliance to the CWDM system specifications.

Transmitters with a wavelength offset can create additional attenuation in the multiplexers and demultiplexers. When test access points are available, technicians can check a wavelength’s presence and its associated power level to verify that all transmitted wavelengths have been correctly multiplexed without excess power loss on one of the channels.

The pluggable SFP transceivers in the COSA can be used to test the link between the headend and the end customer, when a system transceiver is unavailable. It is important to verify the link loss per wavelength and guarantee the continuity of the connection over multiplexers, demultiplexers, and optical add-drop multiplexers (OADMs).

CWDM networks are for shorter-distance applications that do not require amplified links, thus enabling the use of a wider transmission window between 1270 and 1610 nm where amplifiers are unavailable. In non-amplified passive CWDM links, the OSNR remains unchanged on both the transmitter and receiver sides, eliminating the need to measure OSNR.

One-button auto-testing guarantees that technician needs no special training to carry out a CWDM test, making Viavi’s instrument suitable for both novice and expert technicians. An Auto-Test mode automatically identifies WDM channels, selects the appropriate wavelength range, and provides auto scaling and system qualification according to pre-defined parameters.


High Performance CWDM Testing
Full wavelength range 1260 to 1625 nm (Full band CWDM tester) Fast scanning speed (<4 s) Real spectral measurements with:

• Complete spectral trace
• Tabular results of power and wavelength
• Zoom and marker functions

Features

• Handheld, fully-functional CWDM OSA
• Fast scanning speed (4s)
• Zoom and marker functions
• Pass/Fail analysis

MTS-4000 Specifications

COSA-4055 Specifications