FWT-200 Series

The FWT-200 series is a handheld optical time domain reflectometer with a lightweight body and an ergonomic design. The appearance of the game console makes it comfortable to hold and is equipped with a 5-inch colour touch screen for clear display. The large dynamic dual wavelength 32/30dB, minimum blind area: 2/8m, is used to measure fibre breakpoints, length and loss. It is highly integrated with automatic OTDR, expert OTDR, event map, optical link intelligent analysis, loss test, optical multimeter, network cable search, network cable alignment, file management, remote management and other functions.

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FWT-200-PON

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FWT-200-PON Expert Mini OTDR 1310 / 1550 / 1625nm 32/30/30dB, Fibre Tester Optical Reflectometer, 5" Touch Screen, iOLA OPM VFL Event Map & RG45 Cable Test and locate.

System test with splitters up to 1.16 in iOLA Mode

Why 3 wavelengths in a reflectometer?

Having an OTDR with the ability to measure at 3 wavelengths comes with a number of benefits. The first is the ability to fulfil customer orders to their specifications. Requirements for reflectometric measurements range from those where the customer expects measurements at 1310 nm and 1550 nm to those where only measurements at 1625 nm are expected (mainly measurements in larger operators' networks). The FWT-200-PON can handle any of these types of requests.

Another benefit is the possibility of full diagnostics of the system being made. The additional 1625 nm laser makes it possible to detect any macro-bends in the system that would not necessarily manifest themselves with 1310/1550 nm measurements. The higher wavelength, due to occupying a larger area of the MFD in the fibre, is more sensitive to leakage at bends, resulting in increased attenuation. However, it is worth making measurements at lower wavelengths as well, since it is at these wavelengths that transmission is usually realized. In addition, the 1310 nm wavelength helps highlight fibre positioning problems (poor connectors, splices). To summarize, 3-wave measurement is a complete measurement and provides full information about the network.

An example of a 3-wavelength measurement performed with the FWT-200-PON in which the measurement at a longer wavelength highlighted a problem at the splice site. The problem, however, is not the splice itself, but the bend in the fiber that occurs right behind it. Event number 2 is a combination (splice) of fibres in G.652.D and G.657.B3. When measured at a wavelength of 1310 nm, an apparent signal amplification (gain) of 0.104 dB was recorded at this location, as expected (screenshot on the left) – you can read more about "gainers" here. This is the correct combination. The measurement at 1550 nm gives a worse result – an attenuation of 0.233 dB appears at the apparent gain spot (middle screenshot), which is a poor result for a splice and suggests that there may be a kink there. This is finally confirmed by a measurement at 1625 nm, which gives a result of 0.717 dB at this location (screenshot on the right). After eliminating the kink on the fibre, the measurement at 1310 nm did not change, while for higher wavelengths this connection became invisible in the measurement.

FWT-200-S3S5

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FWT-200-S3S5 Expert Mini OTDR 1310 / 1550nm 20dB, Fibre Tester Optical Reflectometer, 5" Touch Screen, iOLA OPM VFL Event Map & RG45 Cable Test and locate.

FWT-200-S61S

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FWT-200-S61S Expert Mini OTDR 1610nm 20dB, Active Live Fibre Tester Optical Reflectometer, 5" Touch Screen, iOLA OPM VFL Event Map & RG45 Cable Test and locate.

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Basics of Using an OTDR Download

Software download "File Report generator".