The NK4300 Mini LAN-OTDR Fiber Optic Tester is a compact, multi-functional tool that is indispensable for professionally servicing and installing fiber optics in FTTH, metro, and LAN networks. Technicians will appreciate the capacitive touch screen for zooming, a fast processor for smooth operation—including 3Hz refresh on-the-fly—a Bluetooth connection for pairing with mobile applications, and strong backlighting that provides excellent visibility even in bright daylight.
The NK4300 is a full-function tester while the OTDR tests the core, all other features required to troubleshoot a network—including an optical power meter, stable light source, VFL, insertion loss tests, flashlight, RJ45 testing tool are built right into the unit. In addition, Smart Diagnostics offers options for reviewing curves, generating maps, listing events, or summarizing results as text. It also provides automatic Pass/Fail results based on information collected from the OTDR and other tools without having to wait for the completion of the engineering report. Guide and launch fiber connections allow for accelerated setup time and ease of use.
Data can be downloaded via the MicroSD (TF) card and Type-C or USB in the standard .SOR format—no more waiting for changes to be made for future engineering reports. The NK4300’s versatility extends to FTTx and 4G networks as well. Its RJ45 Digital Tracer has a range of 300m, even when connected to live lines with POE technology. Optional end-face inspection can be added to ensure proper polishing.
The Dual Wavelength OTDR 1310/1550 nm allows for the comparison of multiple traces side-by-side, enabling technicians to quickly identify problems in G.652 single-mode fibers. Live testing at 1625 nm and 1650 nm utilizes built-in filters to enable in-service measurements.
Technical Specifications
Technical SpecificationsOTDR Parameters (G.652 Single-Mode Fiber)
| Model | Wavelength | Max Dynamic Range | Event/Attenuation Dead Zone | Display Test Range | Pulse Width |
| NK4300D1 | 1310/1550 nm | 26 / 24 dB | 1.5 m / 8 m | 0.1-260 km | 3 ns-20 μs |
| NK4300D2 | 1310/1550 nm | 30 / 28 dB | 1.5 m / 8 m | 0.1-260 km | 3 ns-20 μs |
| NK4300T1 | 1310/1550/1625 nm | 24 dB | 1.5 m / 8 m | 0.1-260 km | 3 ns-20 μs |
| NK4300F1 | Live 1310/1550 nm | 24 dB | 1.5 m / 8 m | 0.1-260 km | 3 ns-20 μs |
| NK4300F2 | Live 1310/1550/1610 nm | 24 dB | 1.5 m / 8 m | 0.1-260 km | 3 ns-20 μs |
| NK4300F3 | Live 1625 nm | 24 dB | 1.5 m / 8 m | 0.1-260 km | 3 ns-20 μs |
| NK4300F4 | Live 1650 nm | 24 dB | 1.5 m / 8 m | 0.1-260 km | 3 ns-20 μs |
OTDR Performance at the Core Level includes a Distance Accuracy of ±(1 m + sampling interval + 0.005% × distance), Sample Interval 0.005 m-16 m Distance, Linearity of 0.05 dB/dB with a maximum of 160k Sample Points, Resolution ranging from 0.03 m-16 m Distance / 0.001 dB Loss, Loss Threshold of 0.20 dB, Distance Resolution of 0.001 m, Refractive Index Range of 1.00000 – 2.00000, SOR Standard Format, 4-Point / 5-Point Loss Analysis, Compatibility with FC / UPC Connectors interchangeable with SC / ST, and a Typical Refresh Rate of 3 Hz.
Optical Power Meter (OPM)
| Parameter | Specification |
| Wavelength Range | 800-1700 nm |
| Calibrated Wavelengths | 850/1270/1300/1310/1490/1550/1577/1625/1650 nm |
| Measurement Ranges | -70 to +6 dBm opt. / -50 / 26 dBm std. / -40 / 26 dBm CWDM |
| Resolution | 0.01 dB |
| Uncertainty | ±5% |
| ID Frequencies | CW / 270 / 330 / 1 k / 2 k Hz |
| Connector | Universal FC / SC / ST |
Stable Light Source / Visual Fault Locator (VFL)
| Parameter | Stable Source | VFL |
| Wavelength | Matches OTDR | 650 nm ± 20 nm |
| Output Power | -5 dBm | 10 mW (8-10 km typical) |
| Stability | CW ± 0.5 dB / 15 min after 15 min warm-up | – |
| Modes | CW / 270 Hz / 330 Hz / 1 kHz / 2 kHz | CW / 1 Hz / 2 Hz |
| Connector | Matches OTDR | 2.5 mm Universal Connector |
RJ45 / Other Tests
- Insertion Loss Test: Supported wavelength matches stable source.
- RJ45 Digital Tracing / Mapping: 300 m range, live line / POE compatible.
- RJ45 Wire Length: Up to 300 m.
- Optical Loss Test: References source / OPM specifications.
General Specifications
| Parameter | Specification |
| Display | 4.3″ 800 x 480 IPS TFT-LCD, multi-touch capacitive |
| Power Supply | AC / DC adapter 100-240 V in, 5 V / 2 A out; 3.7 V 5000 mAh Li-polymer expandable to 10000 mAh; USB-C charging supported |
| Data Storage | 8 GB internal (200,000 traces) |
| Interfaces | USB, Type-C |
| Operating Temperature | -10 °C to 50 °C |
| Storage Temperature | -40 °C to 70 °C |
| Humidity | 0-95% non-condensing |
| Weight | ≤ 0.6 kg (with dual batteries) |
| Dimensions | 189 x 115 x 43 mm |
Standard Accessories
Included with every model is a standard accessory package that consists of the following items: host device with battery, AC power supply, data communication cable, an 8 GB MicroSD (TF) card that includes preinstalled analysis software and instruction manual, a printed copy of the operator’s manual, SC adapter (interchangeable with FC), RJ45 ethernet tracer and remote, test report, certificate / warranty card (2-year), cleaning swabs, and a carry bag.
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