K-300 handheld OTDR with trace on the 3.5-inch touch screen

OTDR & Test Instruments

K-300 OTDR

A handheld OTDR sized for everyday FTTH and metro work: 1310/1550 nm, up to 120 km of range, a 3.5-inch touch screen, and 0.88 kg with ten hours in the battery.

Wavelength: 1310/1550 nm (±20 nm)
Light source: LD
Dynamic range: 30/28 dB or 32/30 dB (by configuration)
Display: 3.5 in TFT LCD touch screen
Optical interface: FC/UPC

30/28 dB (no VFL)32/30 dB (with built-in VFL)

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Key features

Two builds: 30/28 dB for access and drop work, or 32/30 dB with a built-in 650 nm VFL (≥-3 dBm, 3 km) for jobs that also need visible fault checks
Touch screen plus keypad — full control on the trace, and still usable with gloves on in the cabinet
Event dead zone 1.8 m and attenuation dead zone 10 m — close-spaced events in closures and distribution boxes still read separately
More than 60,000 traces stored and moved out over USB; an optical communications (live signal) test is built in
0.88 kg and ten hours or more of continuous work — a full shift of fault calls on one charge

Specifications

Wavelength	1310/1550 nm (±20 nm)
Light source	LD
Dynamic range	30/28 dB or 32/30 dB (by configuration)
Display	3.5 in TFT LCD touch screen
Optical interface	FC/UPC
Distance range	0.3, 1, 3, 5, 10, 30, 60, 120 km
Pulse width	5–20480 ns, Auto
Measurement duration	15 s, 30 s, 1 min, 2 min, 3 min
Event dead zone	1.8 m
Attenuation dead zone	10 m
Distance measurement precision	±(1 m + 5×10⁻⁵ × distance + sampling interval)
Data storage	>60,000 test traces
Communication interface	USB; SD card slot fitted
VFL (32/30 dB build)	650 nm, ≥-3 dBm, test distance 3 km
Optical communications test	Supported
Dimensions	220 × 106 × 60 mm
Weight	0.88 kg
Power supply	Lithium battery, ≥10 h continuous working
Operating temperature	-10 °C to +50 °C
Storage temperature	-30 °C to +70 °C
Relative humidity	0–95% (non-condensing)

Where it works

FTTH installation and activation — proving the drop before the subscriber visit ends
Metro, WAN and CATV cable maintenance and troubleshooting
Locating breaks and high-loss points after construction damage or rodent bites
Reconstruction work: re-certifying spans after re-splicing and re-routing