LOT-5100 Series OTDR

LinkU LOT5100 OTDR is designed to help technicians make test quickly and accurately with simple steps.


With the fast growing fiber optic network, the demand for reliable and ease-of-use field test instruments keeps increasing. LinkU LOT5100 OTDR is designed to help technicians make test quickly and accurately with simple steps. It combines various function modules in one unit, including OTDR, Optical Power Meter, stable Laser Source, Visual Fault Locator and fiber microscope (optional), all the modules are very useful in optical fiber evaluation.


Multi-Function OTDR Testing 

• Auto/Manual testing and analysis
• Icon-display Fiber Mapper for easy interpretation of network events
• Multiple analysis functions on testing results:
• Segment/Event point return loss,Multi curves comparison
• In-Line Measurement of PON systems through splitters
• Fault locating, fiber length/loss/return loss measurement
• Connector/ splice/ splitter/ macro bend/ fiber-end detection
• GR-196-CORE (.SOR) file format
• Flexible file Naming
• Screenshot and auto-saved
• Built-in Power Meter, Laser Source and VFL modules 

 High Performance Platform      

•5.6-inch touch screen
• Lightweight, 1.1kg
• Excellent Man-Machine interface for easy operation
• Short dead zone: EDZ 1m, ADZ 5m
• 16G internal storage capacity
• Full range of models with multiple wavelengths selectable 850/1300/1310/1550/1490/1625/1650nm (customized)
• Damp-dust-shock proof
• Over 8 hours continuous operation 

PC Software

• Multi traces analysis
• Single/multi traces printing in one report
• Batch editing and printing
• Bidirectional traces analysis
• CSV report formats

Stabilized Laser Source Module

• Wavelength same as the OTDR
• High precision and easy operation

Optical Power Meter Module

• Multi-wavelength Calibration
• High Precision and easy Operation


Display 5.6-inch TFT Touch Screen (640×480)
Connectivity USB(Type A×1,Type B×1)
Storage Capacity 16 GB
Power Supply Rechargeable Li-Ion Battery: 7.4V/2500mAh * 2pcs /AC Adapter
Battery Life 10 hours continuous operation
Operation Temp. -10°C – 50°C
Storage Temp. -20°C – 70°C
Humidity 0 – 95% (Non-Condensing)
Weight 1.1kg(including battery)
Dimensions (L×W×H) 215×155×68mm
OTDR Module Wavelength


Dynamic Range (1)


EDZ (m)(2) ADZ(m)(2)
LOT5100-SD28 1310/1550 28/26 1 5
LOT5100-SD32 1310/1550 30/32 1 5
LOT5100-SD35 1310/1550 35/33 1 5
LOT5100-SD40 1310/1550 40/38 1 5
LOT5100-MD26 850/1300 26/20 2 10
LOT5100-SM28 1310/1550/850/1300 28/26/20/26 1 (SM) /1.2 (MM) 5 (SM) / 6 (MM)
LOT5100-SM35 1310/1550/850/1300 35/33/20/26 1 (SM) /1.2 (MM) 5 (SM) / 6 (MM)
LOT5100-ST35 1310/1550/1625 35/33/32 1 5
Pulse Width SM: 3ns, 5ns, 10ns, 20ns, 50ns, 100ns, 200ns, 500ns, 1μs, 2μs, 5μs, 10μs, 20μs
MM: 3ns, 5ns, 10ns, 20ns, 50ns, 100ns, 200ns, 500ns, 1μs, 2μs, 5μs, 10μs
Min. Sampling Resolution 0.05 m
Max. Sampling Point 256,000
Linearity ≤0.05dB/dB
Loss Resolution 0.001dB
Distance resolution 0.01 m
Distance Accuracy ± (1m+measuring distance×3×10-5+sampling resolution) (excluding IOR uncertainty)
Attenuation Accuracy ±0.05 dB/dB
Reflectance Accuracy Single mode: ±2dB, Multi-mode: ±4dB
Connector FC/UPC


(1)   Dynamic range is measured with maximum pulse width, averaging time is 3 minutes, SNR=1;

The level difference between the RMS noise level and the level where near end back-scattering occurs.

(2)   Event dead zone is measured with pulse width of 3ns; attenuation dead zone is measured with pulse width of 5ns.

Standard Modules

Visual Fault Locator
Wavelength 650nm
Output Power 10mw @CW
Frequency CW/2Hz


Stabilized Laser Source Module
Wavelength 1310nm,1550nm
Output Power -5dBm±2dB @CW
Frequency CW/270Hz/1KHz/2KHz


Power Meter Module
Calibrated Wavelength 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm, 1650nm
Measurement Range A: -70dBm – +10dBm (-60dBm – +6dBm @ 850nm)

B: -50dBm – +23dBm (-40dBm – +20dBm @ 850nm)

Detector Type InGaAs
Display Resolution 0.01dB
Accuracy ± 5% ± 0.01nW (±0.5dB@850nm)

Optional Modules

Optical Connector Inspector Module – LFM
Magnification 400x
Resolution Ratio 0.75 µm
Sennor 1/3 decimeter   1.3 million pixels
Weight(kg) Probe (0.14)
Dimensions(cm) Probe (22*3*3)
Work/Storage -20℃~+50℃ / -30℃~+60℃
USB Interface 1.0/1.1/2.0
Tips(Standard) FC/SC/ST/E2000 / LC/MU UPC connector

FC/SC/ST/E2000 / LC/MU UPC bulkhead

Tips(Optional) FC/SC/ST/E2000 / LC/MU APC connector

SC/FC/LC APC bulkhead

 *Specifications subject to change without notice

Standard Package
Main Unit, Lithium Battery*2, Touch Pen, 16G Storage Card, Manual, Software, Mini USB Cable, Power Adaptor, Carrying Bag, Calibration Report


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