The FS200-300 from AFL is an Optical Time Domain Reflectometer (OTDR) that operates at a wavelength of 1310 nm or 1550 nm. It has a wavelength tolerance of ± 20 nm and pulse width of 3 ns - 20 µs. This OTDR has a dynamic range of 37 dB or 35 dB and distance range of 250 m - 240 km. It has an event dead zone of 0.8 m and attenuation dead zone of 2.5 m. This OTDR has a passive optical networks (PON) dead zone of 25 m and linearity of ± 0.05 dB/dB. It has data points up to 300,000 and data spacing of 5 cm - 16 m.

The FS200-300 has an index of refraction of 1.3000 - 1.7000, a refresh rate of up to 4 Hz, and PON filter isolation of greater than 50 dB (1260 nm - 1600 nm). It has an integrated visual fault locator (VFL) that emits a visible red laser at a wavelength of 650 nm, along with optional optical laser source and optical power meter modules. This OTDR can be operated in SmartAuto, Expert, & Real-time modes and features FleXpress fast & live PON OTDR test, live fiber protection & detection. It has LinkMap summary, LinkMap events, and Trace display modes.

The FS200-300 has a 4 GB internal memory and an external USB memory stick. It is Telcordia SR-4731 Issue 2, Windows PC, Android & iOS compatible, and can be controlled via USB cable or Bluetooth. This OTDR is available in a module that measures 86 mm x 160 mm x 43 mm and is ideal for applications such as PON or point-to-point network verification or troubleshooting, OTDR testing with insertion loss & power measurements, locate faults exceeding industry or user-defined pass/fail thresholds & visually pinpoint the location of macro-bends or breaks.