Keysight Technologies 81610A User manual

Keysight 81610A/11A/12A/
13A/14A
Return Loss Module
User’s Guide

Keysight 81610A/11A/12A/13A/14A Return Loss Module, Edition 6 3

4 Keysight 81610A/11A/12A/13A/14A Return Loss Module,
Edition 6
Notices
This document contains proprietary information that is
protected by copyright. All rights are reserved.
No part of this document may reproduced in (including
electronic storage and retrieval or translation into a foreign
language) without prior agreement and written consent from
Keysight Technologies Deutschland GmbH as governed by
United States and international copywright laws.
©Copyright 2000, 2015 by:
Keysight Technologies Deutschland GmbH
Herrenberger Str. 130
71034 Böblingen
Germany
Subject Matter
The material in this document is subject to change without
notice.
Keysight Technologies makes no warranty of any kind with
regard to this printed material, including, but not limited to, the
implied warranties of merchantability and fitness for a
particular purpose.
Keysight Technologies shall not be liable for errors contained
herein or for incidental or consequential damages in connection
with the furnishing, performance, or use of this material.
Printing History
New editions are complete revisions of the guide reflecting
alterations in the functionality of the instrument. Updates are
occasionally made to the guide between editions. The date on
the title page changes when an updated guide is published. To
find out the current revision of the guide, or to purchase an
updated guide, contact your Keysight Technologies
representative.
Control Serial Number: First Edition applies directly to all
instruments.
Warranty
This Keysight Technologies instrument product is warranted
against defects in material and workmanship for a period of one
year from date of shipment. During the warranty period,
Keysight will, at its option, either repair or replace products that
prove to be defective.
For warranty service or repair, this product must be returned to
a service facility designated by Keysight. Buyer shall prepay
shipping charges to Keysight and Keysight shall pay shipping
charges to return the product to Buyer. However, Buyer shall
pay all shipping charges, duties, and taxes for products returned
to Keysight from another country.
Keysight warrants that its software and firmware designated by
Keysight for use with an instrument will execute its
programming instructions when properly installed on that
instrument. Keysight does not warrant that the operation of the
instrument, software, or firmware will be uninterrupted or error
free.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from
improper or inadequate maintenance by Buyer, Buyer-supplied
software or interfacing, unauthorized modification or misuse,
operation outside of the environmental specifications for the
product, or improper site preparation or maintenance.
No other warranty is expressed or implied. Keysight
Technologies specifically disclaims the implied warranties of
Merchantability and Fitness for a Particular Purpose.
Exclusive Remedies
The remedies provided herein are Buyer’s sole and exclusive
remedies. Keysight Technologies shall not be liable for any
direct, indirect, special, incidental, or consequential damages
whether based on contract, tort, or any other legal theory.
Assistance
Product maintenance agreements and other customer assistance
agreements are available for Keysight Technologies products.
For any assistance contact your nearest Keysight Technologies
Sales and Service Office.
Certification
Keysight Technologies certifies that this product met its
published specifications at the time of shipment from the
factory.
Keysight Technologies further certifies that its calibration
measurements are traceable to the United States National
Institute of Standards and Technology, NIST (formerly the
United States National Bureau of Standards, NBS) to the extent
allowed by the Institutes’s calibration facility, and to the
calibration facilities of other International Standards
Organization members.
ISO 9001 Certification
Produced to ISO 9001 international quality system standard as
part of our objective of continually increasing customer
satisfaction through improved process control.
Edition 6:
81610-90A15
February 2015
Edition 1:
81610-90014 E0900
September 2000
Edition 2:
81610-90014 E1000
October 2000
Edition 3:
81610-90014 E0201
February 2001
Edition 4:
81610-90014 E0401
April 2001
Edition 5:
81610-90A15
February 2002

Safety Symbols Safety Considerations
Keysight 81610A/11A/12A/13A/14A Return Loss Module, Edition 6 5
Safety Considerations
The following general safety precautions must be observed during all phases of
operation, service, and repair of this instrument. Failure to comply with these
precautions or with specific warnings elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability for the customer’s failure to comply with these
requirements.
Before operation, review the instrument and manual, including the red safety
page, for safety markings and instructions. You must follow these to ensure
safe operation and to maintain the instrument in safe condition.
Safety Symbols
The apparatus will be marked with this symbol when it is necessary for the user
to refer to the instruction manual in order to protect the apparatus against
damage.
Hazardous laser radiation.
Initial Inspection
Inspect the shipping container for damage. If there is damage to the container or
cushioning, keep them until you have checked the contents of the shipment for
completeness and verified the instrument both mechanically and electrically.
The Performance Tests give procedures for checking the operation of the
instrument. If the contents are incomplete, mechanical damage or defect is
apparent, or if an instrument does not pass the operator’s checks, notify the
nearest Keysight Technologies Sales/Service Office.
The WARNING sign denotes a hazard. It calls attention to a procedure,
practice or the like, which, if not correctly performed or adhered to, could
result in injury or loss of life. Do not proceed beyond a WARNING sign until
the indicated conditions are fully understood and met.

Safety Considerations Line Power Requirements
6 Keysight 81610A/11A/12A/13A/14A Return Loss Module,
Edition 6
Line Power Requirements
Keysight 81610A/13A Return Loss Modules operate when installed in the
Keysight 8163A/B Lightwave Multimeter, Keysight 8164A/B Lightwave
Measurement System, and Keysight 8166A/B Lightwave Multichannel System.
Operating Environment
The safety information in the Keysight 8163A/B Lightwave Multimeter,
Keysight 8164A/B Lightwave Measurement System, and Keysight 8166A/B
Lightwave Multichannel System User’s Guide summarizes the operating
ranges for Keysight 81610A/13A Return Loss Modules. In order for these
modules to meet specifications, the operating environment must be within the
limits specified for the Keysight 8163A/B Lightwave Multimeter,
Keysight 8164A/B Lightwave Measurement System, and Keysight 8166A/B
Lightwave Multichannel System.
Storage and Shipment
This module can be stored or shipped at temperatures between
−40°C and +70°C. Protect the module from temperature extremes that may
cause condensation within it.
To avoid hazardous electrical shock, do not perform electrical tests when there
are signs of shipping damage to any portion of the outer enclosure (covers,
panels, etc.).
You MUST return instruments with malfunctioning laser modules to a
Keysight Technologies Service Center for repair and calibration.

Initial Safety Information for Return Loss Modules Safety Considerations
Keysight 81610A/11A/12A/13A/14A Return Loss Module, Edition 6 7
Initial Safety Information for
Return Loss Modules
The laser sources specified by this user guide are classified according to IEC
60825-1 (2007).
The laser sources comply with 21 CFR 1040.10 except for deviations pursuant
to Laser Notice No. 50 dated 2007-June-24:
Table 1 Return Loss Modules Laser Safety
Information
Keysight 81613A
Laser type FP-Laser
InGaAsP
Wavelength (±15nm) 1550/1625 nm
Max. CW output power* <1.8mW
Beam waist diameter 9 µm
Numerical aperture 0.1
Laser Class according to IEC 60825-1 (2007) 1
Max. permissible CW output power 10 mW
* Max. CW output power is defined as the highest possible optical pow-
er that the laser source can prodcue at its output connector

Safety Considerations Initial Safety Information for Return Loss Modules
8 Keysight 81610A/11A/12A/13A/14A Return Loss Module,
Edition 6
Laser Safety Labels
Laser class 1 label
Figure 1 Class 1 Safety Label - Keysight 81613A
Please pay attention to the following laser safety warnings:
• Under no circumstances look into the end of an optical cable attached to the
optical output when the device is operational. The laser radiation can
seriously damage your eyesight.
• Do not enable the laser source when there is no fiber attached to the optical
output connector.
• The laser is enabled by pressing the gray button close to the optical output
connector on the front panel of the module. The laser is on when the green
LED on the front panel of the instrument is lit.
• The use of optical instruments with this product will increase eye hazard.
• The laser module has a built-in safety circuitry which will disable the
optical output in the case of a fault condition.
• Refer servicing only to qualified and authorized personnel.

Environmental Information Safety Considerations
Keysight 81610A/11A/12A/13A/14A Return Loss Module, Edition 6 9
Environmental Information
This product complies with the WEEE Directive (2002/96/EC) marking
requirements. The affixed label indicates that you must not discard this
electrical/ electronic product in domestic household waste.
Product Category: With reference to the equipment types in the WEEE
Directive Annex I, this product is classed as a "Monitoring and Control
instrumentation" product.
Do not dispose in domestic household waste.
To return unwanted products, contact your local Keysight office, or see
http://about.keysight.com/en/companyinfo/environment/takeback.shtml for
more information.

Safety Considerations The Structure of this Manual
10 Keysight 81610A/11A/12A/13A/14A Return Loss Module,
Edition 6
The Structure of this Manual
This manual is divided into two categories:
• Getting Started
This section gives an introduction to the Tunable Laser modules. and aims to
make these modules familiar to you:
–“Getting Started with Return Loss” on page 15.
• Additional Information
This is supporting information of a non-operational nature. this contains
information concerning accessories, specifications, and performance tests:
–“Accessories” on page 47,
–“Specifications” on page 49
–“Performance Tests” on page 59
Conventions used in this manual
• Hardkeys are indicated by italics, for example, Config, or Channel.
• Softkeys are indicated by normal text enclosed in square brackets, for
example, [Menu] or [Details].
• Parameters are indicated by italics enclosed by square brackets, for example,
[RLref], or [Para].
• Menu items are indicated by italics enclosed in brackets, for example,
<Terminated Calibration>, or <Continuous>.