ST3300 OTDT Optical Time Domain Reflectometer

As fiber optics plays more and more important role in modern telecommunication and CATV networks, the requirements to the construction, test and maintenance of fiber optics links also become more prominent. ST3300 is a unique product mainly designed for construction and maintenance of telecommunication and CATV networks. ST3300 can be widely used in engineering construction, maintenance test and emergency repair of all fiber optics related systems. Comparing with a regular OTDR, ST3300 is more compact in size and easier for field use. ST3300 has handheld design, compact and lightweight, easy to carry. Event information through TFT color display and data storage capabilities. Through the USB interface, the test data can be uploaded to the PC, to facilitate the post-processing, archiving and printing.

For more information about this product contact Tinsley.

*All information provided by Tinsley in this datasheet is believed to be accurate. Tinsley reserves the right to discontinue andchange specifications and prices at any time without prior notice. For further details, please refer to our website contact Tinsley 

Note: Because of the technical nature of Submarine Cable Testing Equipment and the use and support requirements across international boundaries, the equipment can only be purchased direct from the manufacturer: - Tinsley Precision Instruments in the UK or through certified international agents listed on our website.


  1. Hand-held design, compact and lightweight
  2. Anti-seismic, shockproof and appropriate for field operation
  3. Unique hotkey design
  4. Starting in 3 seconds measuring immediately
  5. Narrow event blind zone, simple test of fiber patchcord
  6. Automatic and manual test function
  7. High Capacity SD card
  8. Low-power design, optical lithium battery or AA-size alkaline batteries
  9. VFL (Visual Fault Location) function
  10. Multiple light outputs, FC as standard ST/SC optional and exchangeable
  11. OTDR Viewer software for data analysis
  12. Light alarm function, preventing the device from being damaged by the signal light




Sensing Fiber
Single mode fibers
Dynamic Range (dB)①
Pulse Duration(ns)
10/20/50/100/200/500 /1us/2us/5us/10us/20us
Even Dead Zone(m)②
Attenuation Dead Zone②
Attenuation Detect Accuracy(dB/dB)
Loss Resolution(dB)
Sampling Resolution(m)
0.16-5 (0.16 0.32 0.64 1.28 2.56 5.08)
Distance Measure Accuracy(m)③
±(1m+5x0.005%xdistance+sampling space)
Max Measuring Distance (km)
Data Storage
>10000 records
Storage Format
.sor bellcore file
Averaging Time
Operating Temperature 0°C -50°C Storage Temperature -20°C -60°C
Relative Humidity
Battery life
>10 hours
Interface Type 
FC(ST/SC Interchangeable)/PC
USB/SD card
Matching Function Modules
CVisible Fault Locator
Wavelength: 650nm; Farthest distance test:5Km
Stable light Source Module④
Wavelength(±20):The work of OTDR with wavelength
1)The dynamic range is SNR =1 the maximum pulse width within averaging time of 3 minutes
2)Conditions for dead zone measurement: reflection strength beleow-45dB, Event Dead Zone with 10ns pulses width measurement, Attention Dead Zone 50ns pulse width measurement.
3)Do not include due to refraction caused by the uncertainty.
4)Stable source and CuteOTDR sharing the same light port and Cute OTDR work wavelength consistent.

Telecommunication construction and maintenance

CATV construction and maintenance

Cabling system

Optical components production and research

Other fiber-optics projects

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