Atec EXFO-BRT-320A User Manual

BRT-320A

NETWORK TESTING—OPTICAL

OPTICAL RETURN LOSS TEST SET

Telecom Test and Measurement

www.EXFO.com

Features Sous-titre

Built-in thermoelectrically cooled (TEC) laser(s)

Range of 0 dB to –70 dB

Quick and easy to operate

Rugged, field-ready

Stores up to 300 readings

Fast Stabilization

EXFO’s BRT-320A is a field-ready return loss test set offered in five configurations:
1310 nm, 1550 nm or 1625 nm; dual-wavelength 1310/1550 nm or 1550/1625 nm.
All come equipped with rapidly stabilizing TEC lasers and low-drift photodetectors to
ensure constant optical return loss (ORL) measurements year after year.

Built-In User-Friendliness

Use the BRT-320A to read backreflection from 0 dB to -70 dB and easily store up
to 300 readings in a non-volatile memory. ORL readings appear directly on the large,
backlit LCD. An ORL zero function accounts for incidental backreflections before
the point of measurement and complies with Bellcore optical continuous wave
reflectometer (OCWR) requirements. In User Calibration mode, you can calibrate
the unit to a known reflection. Other features include three-way powering
(rechargeable NiCd battery pack, 9 V battery, AC adapter/charger), 0.01 dB
resolution, ± 0.1 dB linearity, internal InGaAs detector, low-battery indicator and a
protective holster with shoulder strap.

Reveal Return Loss Problems

Many digital and analog fiber systems require ORL characterization. ORL along a
fiber span is a combination of Rayleigh scattering and Fresnel reflections. Together,
these phenomena can reduce fiber system performance and increase bit error rate
(BER) by degrading transmitter stability. The BRT-320A measures cumulative link
return loss and individual component reflectance to reveal potential ORL problems
before they seriously affect your applications.

Versatile

The BRT-320A is ideal for local and long-distance Telco, CATV, utility, broadband
and transmission equipment manufacturing applications. These environments often
require complete network ORL characterization and component reflectance
verification. The BRT-320A also functions as a stable, continuous-wavelength light
source for attenuation measurements. Other applications include fiber component
and cable manufacturing.

BRT-320A

Optical Return Loss Test Set

SPBRT320A.6AN © 2006 EXFO Electro-Optical Engineering Inc. All rights reserved. Printed in Canada 06/08

ORDERING INFORMATION

NOTES

a. Characterized at 23 °C ± 2 °C (70 °F ± to 77 °F).
b. rms = root mean square.
c. Typical, after 5-minute warmup (measurement mode activated only after warmup).
d. Typical, after a 15 minute warmup.
e. For temperatures ranging from —10 °C to 40 °C (14 °F to 104 °F).
f. From 0 dB to —30 dB.
g. For reflection measurements from —15 dB to —50 dB.

Connector on measurement port must cause less than —50 dB of reflection
to maintain resolution.

h. Typical.

BRT-320A-XXBLC-XX

SPECIFICATIONS

a

Model BRT-320A-02BLC-58 BRT-320A-03BLC-58 BRT-320A-23BLC-58 BRT-320A-04BLC BRT-320A-34BLC

Wavelength (nm) 1310 ± 15 1550 ± 15 1310/1550 ± 15 1625 ± 15 1550/1625 ± 15
Spectral width (rms)b(nm) < 5 < 5 < 5 < 5 < 5
Output power stability (dB)

15 minutes

c

± 0.01 ± 0.01 ± 0.02 — —

1 hour

d

± 0.05 ± 0.05 ± 0.06 — —
Temperature stabilitye(dB) ± 0.2 ± 0.2 ± 0.3 — —
Reflection range (dB) 0 to —70 0 to —70 0 to —70 0 to —70 0 to —70
Display resolutionf(dB) 0.01 0.01 0.01 0.01 0.01
Linearityg(dB) ± 0.1 ± 0.1 ± 0.1 ± 0.1 ± 0.1
Uncertainty (accuracy)g(dB) ± 0.5 ± 0.5 ± 0.5 ± 0.5 ± 0.5
Minimum output power (dBm) —6.5 —6.5 —7.5 —3 —9/—7
Polarization sensitivity

h

(dB) ± 0.15 ± 0.15 ± 0.15 ± 0.15 ± 0.15

GENERAL SPECIFICATIONS

a

STANDARD ACCESSORIES

SAFETY

Size (H x W x D) 21 cm x 11 cm x 5 cm (8 3/4 in x 4 1/2 in x 2 in)
Weight unit 0.8 kg (1

3

/4 lb)

shipping 2.5 kg (5 1/2 lb)

Temperature operating —10 °C to 40 °C (14 °F to 104 °F)

storage —30 °C to 60 °C (—22 °F to 140 °F)
Relative humidity 0 % to 95 % non-condensing
Power Built-in NiCd batteries (10 hours of operation), 9 V alkaline battery backup, AC adapter/charger

EXFO Corporate Headquarters > 400 Godin Avenue, Quebec City (Quebec) G1M 2K2 CANADA Tel.: [phone] Fax: [phone] [e-mail]

Toll-free: 1 800 663-3936 (USA and Canada) www.EXFO.com

EXFO is certified ISO 9001 and attests to the quality of these products.
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
EXFO has made every effort to ensure that the information contained
in this specification sheet is accurate. All of EXFO’s manufactured
products are compliant with the European Union’s WEEE directive. For
more information, please visit www.EXFO.com/recycle. However, we
accept no responsibility for any errors or omissions, and we reserve the
right to modify design, characteristics and products at any time without
obligation. Units of measurement in this document conform to SI
standards and practices. Contact EXFO for prices and availability or to

obtain the phone number of your local EXFO distributor.

For the most recent version of this spec sheet, please go to the EXFO
website at http://www.EXFO.com/specs

In case of discrepancy, the Web version takes precedence over any printed
literature.

EXFO Montreal 2650 Marie-Curie St-Laurent (Quebec) H4S 2C3 CANADA Tel.: [phone] Fax: [phone]
EXFO Toronto 160 Drumlin Circle Concord (Ontario) L4K 3E5 CANADA Tel.: [phone] Fax: [phone]
EXFO America 3701 Plano Parkway, Suite 160 Plano, TX 75075 USA Tel.: [phone] Fax: [phone]
EXFO Europe SOUTHAMPTON > Omega Enterprise Park, Electron Way Chandlers Ford, Hampshire S053 4SE ENGLAND Tel.: [phone] Fax: [phone]
EXFO Asia 151 Chin Swee Road, #03-29 Manhattan House SINGAPORE 169876 Tel.: [phone] Fax: [phone]
EXFO China No.88 Fuhua, First Road Shenzhen 518048, CH INA Tel.: [phone] Fax: [phone]

Central Tower, Room 801, Futian District

Beijing New Century Hotel Office Tower, Room 1754-1755 Beijing 100044 P. R. CHINA Tel.: [phone] Fax: [phone]

No. 6 Southern Capital Gym Road

Find out more about EXFO's extensive line of high-performance portable instruments by visiting our website at www.EXFO.com.

Source code

02BLC = 1310 nm TEC laser
03BLC = 1550 nm TEC laser
23BLC = 1310/1550 nm TEC laser
04BLC = 1625 nm TEC laser
34BLC = 1550/1625 TEC nm laser

Connector code

EA-EUI-28 = APC/DIN 47256
EA-EUI-89 = APC/FC narrow key
EA-EUI-91 = APC/SC
EA-EUI-95 = APC/E-2000

With EA, a standard test jumper is provided:
EUI-28 = TJ-B86-86
EUI-89 = TJ-B58-58
EUI-91 = TJ-B88-88
EUI-95 = TJ-B96-96

Example: BRT-320A-02BLC-EA-EUI-89

User Guide, AC adapter/charger, NiCd batteries, 9 V alkaline
battery, carrying case, protective holster, shoulder strap, mandrel
tool, complimentary test jumper, and Certificate of Compliance.

This product complies with 21 CFR 1040.10 and IEC 60825-1:
Ed 1.1 1998:
CLASS 1 LASER PRODUCT