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OTDR

An optical time-domain reflectometer (OTDR) is an optoelectronic instrument used to characterize an optical fiber. An OTDR is the optical equivalent of an electronic time domain reflectometer. It injects a series of optical pulses into the fiber under test and extracts, from the same end of the fiber, light that is scattered (Rayleigh backscatter) or reflected back from points along the fiber. The scattered or reflected light that is gathered back is used to characterize the optical fiber. This is equivalent to the way that an electronic time-domain meter measures reflections caused by changes in the impedance of the cable under test. The strength of the return pulses is measured and integrated as a function of time, and plotted as a function of fiber length.
The reliability and quality of an OTDR is based on its accuracy, measurement range, ability to resolve and measure closely spaced events, measurement speed, and ability to perform satisfactorily under various environmental extremes and after various types of physical abuse. The instrument is also judged on the basis of its cost, features provided, size, weight, and ease of use.
Some of the terms often used in specifying the quality of an OTDR are as follows:
Accuracy: Defined as the correctness of the measurement i.e., the difference between the measured
value and the true value of the event being measured.
Measurement range: Defined as the maximum attenuation that can be placed between the instrument and the event being measured, for which the instrument will still be able to measure the event within acceptable accuracy limits.
Instrument resolution: Is a measure of how close two events can be spaced and still be recognized as two separate events.


FTB-730

FTB-730 PON FTTx/MDU OTDR
OPTIMIZED FOR ACCESS FIBER DEPLOYMENTS AND TROUBLESHOOTING

The perfect tool for field technicians who need to seamlessly characterize splitters in PON FTTx and MDU applications.
KEY FEATURESicon
Test through high-port-count splitters (up to 1x128)
Single-mode port for in-service troubleshooting with standard in-line OPM
Dynamic range of up to 39 dB
Short acquisition time to speed up deployment process
EXFO Connect-compatible: automated asset management; data goes through the cloud and into a dynamic database
iOLM-ready: one-touch multiple acquisitions, with clear go/no-go results presented in a straightforward visual format
APPLICATIONSicon
FTTx/MDU test challenges within PON networks
Access network testing (P2P)
Passive Optical LAN (POL)
COMPLEMENTARY PRODUCTS AND OPTIONSicon
Platform: FTB-1
Fiber Inspection Probe: FIP-400B
Data Post-Processing Software: FastReporter 2

LOADED WITH FEATURES TO BOOST YOUR EFFICIENCYicon
REAL-TIME AVERAGING
Activates the OTDR laser in continuous shooting mode, the trace refreshes in real time and allows to monitor the fiber for a sudden change. Perfect for a quick overview of the fiber under test.
AUTOMODE
Used as a discovery mode, this feature automatically adjusts the distance range and the pulse width in function of the link under test. It is recommended to adjust the parameters to perform additional measurements to locate other events.
ZOOM TOOLS
Zoom and center to facilitate the analysis of your fibers. Draw a window around the area of interest and center in the screen quicker.
SET PARAMETERS ON THE FLY
Dynamically change OTDR settings for the ongoing acquisition without stopping or returning to submenus.
MACROBEND FINDER
This built-in feature enables the unit to automatically locate and identify macrobends, no need to spend further time analyzing the traces.
BIDIRECTIONAL ANALYSIS (VIA FASTREPORTER 2 DATA POST-PROCESSING SOFTWARE)
Recommended to ensure true splice characterization, bidirectional analysis combines results from both directions to provide an average loss for each event. For a more complete event characterization, use iOLM and benefit from maximum resolution on both directions (multiple pulse widths at multiple wavelengths) as well as a consolidated view.
TECHNICAL SPECIFICATIONS (OTDR)icon
Model FTB-730
Wavelength (nm) 1310 ± 20/1490 ± 15/1550 ± 20/1625 ± 10/1650 ± 7
Dynamic range at 20 μs (dB) 39/38/37/39 /37
Event dead zone (m) 0.8
Attenuation dead zone (m) 4/4.5/4.5/4.5/4.5
Distance range (km) 1.25, 2.5, 5, 10, 20, 40, 80, 160, 260, 400
Pulse width (ns) 5, 10, 30, 50, 100, 275, 500, 1000, 2500, 10 000, 20 000
Linearity (dB/dB) ±0.03
PON dead zone (m) 35
Loss threshold (dB) 0.01
Loss resolution (dB) 0.001
Sampling resolution (m) 0.04 to 5
Sampling points Up to 256 000
Distance uncertainty (m) ±(0.75 + 0.0025 % x distance + resolution)
Measurement time User-defined (60 min. maximum)
Typical real-time refresh (Hz) 4
Stable source output power (dBm) -2.5
Reflectance (dB) ±2
GENERAL SPECIFICATIONS icon
Size (H x W x D) 130 mm x 36 mm x 252 mm (5 1/8 in x 1 7/16 in x 9 15/16 in)
Weight 0.65 kg (1.4 lb)
Operating Temperature 0 °C to 50 °C (32 °F to 122 °F)
Storage Temperature –40 °C to 70 °C (–40 °F to 158 °F)
Relative humidity 0% to 95% non-condensing
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