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Optical Time Domain Reflectometer-TOT650


Automatic Measurement Mode: Only by selecting the measurement wavelength, the measurement parameters are automatically set, and the trace data is automatically saved and automatically analyzed.

Multi-wavelength Measurement Mode: In the parameter setting, the wavelength can be automatically switched into the multi-wavelength measurement mode. Under this mode, the analysis can be achieved on the attenuation state of the same fiber section under different wavelengths.

Trace Fixing Function: It can achieve the same-screen comparison and display of one trace with another real-time trace or the trace under the average measurement, which is very useful for the installation of multi-core fiber or the checking of the aged fiber in the optical fiber network already been installed.

Multi-wavelength Analysis Function: It can achieve the comparison, display and analysis functions of any trace file.

FTTx online testing, able to identify the splitter and the fiber’s end.

Large-capacity lithium-ion rechargeable battery, with the long standby time over 12 hours.

Bellcore file format (.sor), with the storage of greater than 2000 traces.

Communication Light Detection: It can effectively protect the test instrumentation and communication equipment’s.

Connection State Detection: To promptly know the connection status of the instrumentation and the fiber for test.

The Switching of Measurement Mode: Through the shortcut key operation, it can achieve the flexible switching of real-time measurement mode and average measurement mode.

OTDR Traces Manager PC software:

To achieve easily the function of bulk amendment and batch printing.

Able to generate different forms of test reports according to user needs.

To provide various flexible printing modes: The single-page single-trace printing mode, the batch printing mode, the single-page multi-trace printing mode, the printing mode of multi-waveform display. To provide the personalized selection of printing options and page setup.

The Function of Waveform Difference Comparison: It can open several waveforms in the same window, making more easily the comparison of parameter change caused by fiber aging or other reasons.



Technical Specifications1 



Wavelength (nm)


Dynamic range (dB)2


Event blind zone (m)



Attenuation blind zone (m)


Pulse width (ns)


Test distance

500m, 1km, 2km, 4km, 8km, 16km, 32km, 64km, 128km, 256km


Single model

Linearity (dB/dB)

±0.05 dB/ dB

Accuracy of reflection


Sampling point


Distance uncertainty  (m)

±(0.75m + 5×10-5× distance + sampling interval)

Memory capacity of trace

SD Card , > 2000 pieces


AC/DC charger: 100V-240V, 50/60/HZ, 0.6A Battery: 7.4V 6700mAh

Optical power meter

+26dBm~-50dBm (+6dBm~-70dBm)

General specification

Interface category

Dimension (H×W×D)


Optical interface

FC/PC(SC,ST for option)



Data interface

USB interface, mini-USB, 10M/100M ethernet port


Running temperature -5 to 50

Memory temperature -20 to 70

Visible failure orientation VFL

Relative humidity

0% to 95% (non condensation)



Power supply

Lithium battery; continuing working duration max 12 hours

Output power (dBm)


Warranty period

12 months

Maximum testing distance








Product Inquiry


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 +86 025 84523090(office)
 +86 025 66061889(Marketing)
 Phone:  +86 13920543172
 Add: 5 building, Zijin group, 58 Heng jing Road, Qixia District, Nanjing, Jiangsu, China


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