Luna OBR 6235-1 Portable Single-Channel Optical Backscatter Reflectometer

Portable single-channel OFDR reflectometer that measures distributed return loss and insertion loss over fiber links up to 200 m, or 500 m optional.

Number of optical ports: 1 port
Measurement length modes: 100 m 200 m 500 m
Maximum device length: Up to 200 m, (500 m optional)
Sampling resolution (two-point): 0.20 mm 0.40 mm 1.0 mm

Datasheet

Overview

The Luna OBR 6235-1 is the single-channel model of the OBR 6235, a portable, rugged optical backscatter reflectometer in the OBR 6200 Series. It is intended for testing fiber optic links in data centers and longer networks in aerospace, naval and industrial applications.

The instrument uses optical frequency domain reflectometry (OFDR) to measure distributed return loss (RL) and insertion loss (IL) with sub-millimeter spatial resolution, high precision and high dynamic range. It maps reflection versus length and automatically detects RL reflection events and IL locations that exceed user-defined thresholds.

The OBR 6235 is a battery-powered integrated system with a touchscreen user interface, suited to field maintenance work. Its standard measurement range is up to 200 m. The Extended Length Option (OPT06235) adds a 500 m measurement mode for precision testing of data center interconnects.

The OBR 6235-1 has a single standard FC/APC optical connector. It ships with adapter cables with FC/APC and SC/APC connectors.

Key Features

Fully portable and rugged OBR with extended length range
Track and analyze return loss (RL) and insertion loss (IL) versus length
Sub-millimeter sampling resolution with no dead zones
Measure optical path latency and length with high precision
Detect and precisely locate reflective events
Automatic detection of RL reflection events and IL locations that exceed user-defined thresholds
Single optical channel with standard FC/APC connector
Battery-powered with 10.1 in touchscreen user interface

Specifications

Measurement

Number of optical ports	1 port
Measurement length modes	100 m 200 m 500 m 500 m mode with extended length option
Maximum device length	Up to 200 m, (500 m optional)
Sampling resolution (two-point)	0.20 mm 0.40 mm 1.0 mm For 100 m, 200 m and 500 m modes respectively; distance between two sample points in SMF-28. The web page lists 0.20 mm @ 200 m length; the datasheet gives 0.20 mm for the 100 m mode
Time-of-flight delay accuracy	± 0.005% Accuracy guaranteed via internal NIST-traceable HCN gas cell
Wavelength scan range	4 nm 2 nm 0.8 nm For 100 m, 200 m and 500 m modes respectively
Center wavelength	1546.7 nm
Measurement time	10 s

Return Loss Measurement

RL dynamic range	70 dB Range between strongest reflection greater than -60 dB and noise floor
Total range	0 to -129 dB Noise floor return loss at half of maximum length
Sensitivity	-129 dB Noise floor return loss at half of maximum length
Resolution	± 0.1 dB Measured with 1 cm integration width
Accuracy	± 0.5 dB Measured with 1 cm integration width

Insertion Loss Measurement

IL dynamic range, in reflection mode	15 dB Two way loss before backscatter reaches noise floor and IL measurements are no longer possible
Resolution	± 0.1 dB Measured with integration widths of 25 cm, 50 cm and 125 cm for 100 m, 200 m and 500 m modes, respectively
Accuracy	± 0.2 dB Measured with integration widths of 25 cm, 50 cm and 125 cm for 100 m, 200 m and 500 m modes, respectively

General

Optical output power	4 mW
Battery runtime	3 h
Battery charge time	2 h
Touchscreen display	10.1”, 1280 x 800 resolution
Data I/O ports	USB-C, RJ45 Ethernet
Optical connector	FC/APC (SC/APC or FC/APC adapter patch cord)
Weight	10.1 lb (4.6 kg)
Case size	13.4 x 8.7 x 2.8 in (34 x 22 x 7 cm)