Yokogawa AQ7270 User Manual

Download

User’s Manual

AQ7270 Series OTDR

IM 735020-01E

7th Edition

Product Registration

Thank you for purchasing YOKOGAWA products.

YOKOGAWA provides registered users with a variety of information and services. Please allow us to serve you best by completing the product registration form accessible from our homepage.

http://tmi.yokogawa.com/

PIM 103-03E

Foreword

Notes

Thank you for purchasing the AQ7270 Series (AQ7270/AQ7275) OTDR (Optical Time Domain Reflectometer). This user’s manual contains useful information about the instrument’s functions and operating procedures and the handling precautions of the AQ7270 Series OTDR. To ensure correct use, please read this manual thoroughly before beginning operation. After reading the manual, keep it in a convenient location for quick reference whenever a question arises during operation. Three manuals, including this one, are provided as manuals for the AQ7270 Series OTDR. Please read all of them.

Manual Title Manual No. Description

AQ7270 Series OTDR User’s Manual IM 735020-01E This manual. Explains all functions

and procedures of the AQ7270/ AQ7275 excluding the remote control functions.

AQ7270 Series OTDR IM 735020-02E Explains briefly the functions Operation Guide and basic operations.

AQ7270 Series OTDR Communication IM 735020-17E Explains the functions for Interface User’s Manual controlling the AQ7270/AQ7275 using comm

unication commands.

• The contents of this manual are subject to change without prior notice as a result of continuing improvements to the instrument’s performance and functions. The figures given in this manual may differ from those that actually appear on your screen.

•

Every effort has been made in the preparation of this manual t

o ensure the accuracy of its contents. However, should you have any questions or find any errors, please contact your nearest YOKOGAWA dealer.

• Copying or reproducing all or any part of the contents of this manual without YOKOGA

WA’s permission is strictly prohibited.

Trademarks

• The fiber Xplorer is the registered trademark of Yokogawa Electric Corporation.

• Microsoft, Windows, and Windows XP are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

• Adobe and Acrobat are trademarks of

• For purposes of this manual, the TM and ® symbols do not accompany their respective trademark names or registered trademark names.

• Other company and product names are trademarks or registered trademarks of their respective holders.

Revisions

• 1st Edition: December 2006

• 2nd Edition: January 2007

• 3rd Edition:

• 4th Edition:

• 5th Edition:

• 6th Edition:

• 7th Edition: September 2011

IM 735020-01E

December 2007

February 2008

December 2008

June 2009

Adobe Systems Incorporated.

Checking the Contents of the Package

Unpack the box and check the contents before operating the instrument. If some of the contents are not correct or missing or if there is physical damage, contact the dealer from which you purchased them.

AQ7270 Series

MODEL AQ7270

MODEL Suffix Code Description

735020

1550 nm, 32 dB 735021 1650 nm, 30 dB 735022 1310/1550 nm, 34/32 dB 735023 1310/1550 nm, 40/38 dB 735024 1550/1625 nm, 38/35 dB 735025 1310/1490/1550 nm, 34/30/32 dB 735026 1310/1550/1625 nm, 34/32/28 dB 735027 1310/1550/1650 nm, 34/32/30 dB 735028 1310/1550/1625 nm, 40/38/35 dB 735029 850/1300 nm, 22.5/24 dB (GI (62.5/125 735030

AQ7275

MODEL Suffix Code Description

735031

1650 nm, 30 dB (15dB if the suffix code is /PN) 735032 1310/1550 nm, 34/32 dB (36/34 dB if the suffix code is /DR) 735033 1310/1550 nm, 40/38 dB (23/21dB if the suffix code is /PN) 735034 1310/1550 nm, 43/41 dB 735035 1310/1490/1550 nm, 34/30/32 dB 735036 1310/1550/1625 nm, 40/38/33 dB (23/21/16dB if the suffix code is /PN) 735037 1310/1550/1650 nm, 40/38/30 dB 735038 1310/1550/1625 nm, 40/38/36 dB (23/21/16dB if the suffix code is /PN) 735040 850/1300 nm, 22.5/24 dB (GI (62.5/125

735041 850/1300 nm, 22.5/24 dB (GI (62.5/125mm))

850/1300 nm, 22.5/24 dB (GI (62.5/125mm))

1310/1550 nm, 34/32 dB

1310/1550 nm, 40/38 dB

21.5/23 dB (GI (50/125mm)) 1310/1550 nm, 40/38 dB

m))

IM 735020-01E

Checking the Contents of the Package

AQ7270/AQ7275

MODEL Suffix Code Description

Optical connector -SCC SC connector (fixed)

-FCC FC Connector (fixed)

-ASC Angled PC SC Connector *

-NON No universal adapter

-USC SC universal adapter

-UFC FC universal adapter

Language -HE English

-HC Chinese/English

-HK Korean/English

-HR Russian/English

Power cord -D UL/CSA standard Max. rated voltage: 125 V

-F VDE standard Max. rated votlage: 250 V

-R AS standard Max. rated votlage: 250 V

-Q BS standard Max. rated votlage: 250 V

-H GB standard Max. rated votlage: 250 V

-P EK standard Max. rated votlage: 250 V

Options /PM Optical power monitor function * /SLS Stability Light source function * /LS Light source function * /VLS Visible Light source function * /PL Internal printer and LAN (Ethernet interface) /DF Dummy fiber (SMF) * /SB Shoulder belt /DR Dynamic range expansion (2 dB) * /PN

PON measurement*8 (firmware version 2.07 or later)

*1 Supported by the SMF port of the 735031 to 735038, 735040 and 735041, or supported by the visible light source output port of the 735031 to 735035 and 735038.

Not supported by 735021, 735029 and 735031, and the MMF of 735030, 735040 and 735041

Not supported by 735020 to 735030, and 735040

Not supported by 735029, 735032, 735033 and 735037, and the MMF of 735030 and 735040

Supported by 735031 to 735035 and 735038

Not supported by 735029, 735030, 735040 and 735041

Supported by 735032

Supported by 735031, 735033, 735036 and 735038

IM 735020-01E

• No. (Instrument No.)

When contacting the dealer from which you purchased the instrument, please give

them this number.

iii

Power cord UL/CSA St’d

A1068WD

*1 Included if the suffix code is /PL. *2 Included if the suffix code is -USC. *3 Included if the suffix code is -UFC. *4 Included if the suffix code is /SB.

Power cord VDE St’d

A1071WD

Power cord AS St’d

A1070WD

Power cord BS St’d

A1069WD

Power cord GB St’d

A1076WD

AQ7270 Series OTDR User’s Manual B8070TH

AC adapter 739870-D/F/R/Q/H/P

Battery pack 739880

Printer roll paper A9010ZP

Universal connector (SC)

SU2005A-SCC

Universal connector (FC)

SU2005A-FCC

Hand belt B8070CX

Shoulder belt

B8070CY

Power cord EK St’d

A1078WD

Checking the Contents of the Package

Standard Accessories

The standard accessories below are supplied with the instrument.

Optional Accessories (Sold Separately)

The optional accessories below are available for purchase separately.

Name Part Number Notes

Soft carrying case 738960 Soft case Emulation software 735070 Waveform analysis application Printer roll paper A9010ZP 80 mm width × 25 m roll: 10 rolls per unit Battery pack(reserve) 739880 External Large Capacity Battery 739881 Attached Connecting Cord and Battery

case Universal adapter(SC) SU2005A-SCC SC type Universal adapter(FC) SU2005A-FCC FC type Shoulder belt B8070CY AC adapter(reserve) 739870-D UL/CSA standard 739870-F VDE standard 739870-R AS standard 739870-Q BS standard 739870-H GB standard, Complied with CCC 739870-P EK standard

IM 735020-01E

Safety Precautions

Ni-MH

To use the instrument safely and effectively, be sure to observe the precautions given in the user’s manual.

The following symbols are used on this instrument.

Warning: handle with care. Refer to the user’s manual or service manual.

This symbol appears on dangerous locations on the instrument which require special instructions for proper handling or use. The same symbol appears in the corresponding place in the manual to identify those instructions.

Hazard, radiation of laser apparatus

Direct current

Stand-by (power)

Recycle

Double insulation mark (equipment protected throughout by double insulation or

reinforced insulation)

IM 735020-01E

Safety Precautions

Make sure to comply with the precautions below. Not complying might result in injury or death, or damage to the instrument.

WARNING

Use the Correct Power Supply

Before connecting the power cord, ensure that the source voltage matches the rated supply voltage of the AC adapter and that it is within the maximum rated voltage of the provided power cord.

Use the Correct Power Cord

Use only the power cord that comes with the instrument. Do not use it for other devices.

Use the Correct AC Adapter

Use only the AC adapter specified for the instrument. Do not use it for other devices.

Use Only the Designated Battery pack

Use only the battery pack specified for the instrument. Do not use it for other devices. Use only this instrument or a charger specified by YOKOGAWA to charge the battery pack. If the fast charge does not finish after three hours or more, stop charging the battery pack immediately. Because the electrolyte solution inside the battery pack is alkaline, harm can be done to the clothes or skin, if the battery pack leaks or explodes and the solution comes in contact. If the electrolyte solution enters the eye, it can cause blindness. In such cases, do not rub the eye. Rinse thoroughly with water and immediately consult your eye doctor. To prevent the possibility of electric shock and accidents, always turn OFF the power switch and remove the AC adapter power supply from the instrument when replacing the battery pack. Do not throw the battery pack into fire or apply heat to it. This can cause dangerous explosions or spraying of the electrolytes.

Do Not Look at the Laser Light

Do not look at the laser’s direct ray, reflected ray from a mirror, or indirect ray without the proper protective eyewear. In addition, avoid being exposed to the laser light. It can cause blindness or damage to the eye.

Do Not Operate in an Explosive Atmosphere

Do not use the thermocouple in a location where any flammable or explosive gas/ vapor is present. Operation in such an environment constitutes a safety hazard.

Do Not Remove Covers

The covers should be removed by YOKOGAWA’s qualified personnel only. Opening the cover is dangerous, because some areas inside the instrument have high voltages.

Carrying and Moving the Instrument

Remove all power cords and connection cables from the main unit before moving the instrument. When carrying the instrument, hold it firmly by the handle. Also, if storage media is inserted into the instrument, always remove the storage media before carrying or moving the instrument. Never leave the media inserted when carrying or moving. The storage media can become damaged.

Apply Correct Signals to the Optical Connectors (PORT1 and PORT2)

Do not apply light that is —5 dBm or greater to the AQ7270/AQ7275 optical connectors (PORT1 and PORT2). Doing so may damage the AQ7270/AQ7275.

IM 735020-01E

CAUTION

When Measuring with the Same Wavelength as the Communication Light

Most instrument models use the same wavelength for measurement as is used for communication. If communication light is present in an optical fiber being measured, this has an affect on the communication itself. Take sufficient precautions to avoid interruption of communications. The measurements by the instrument may also be incorrect, therefore the measuring environment (presence or absence of communication light, etc.) should be carefully considered.

When Measuring with a Wavelength Different from the Communication Light (1625/1650 nm)

When there is communication light in the fiber under test, use a wavelength different from the communication light for measurement. If no cutoff filter of 1625 nm or 1650 nm is installed in an instrument connected to the system under test, or depending on the instrument’s lightfastness power rating or characteristics of the cutoff filter such as its attenuation, the pulse light output from the instrument can, in the worst case, damage the instrument. Check that an appropriate cutoff filter is installed and that there is no problem with the instrument’ s ratings, then take sufficient caution during use.

Safety Precautions

When Using the Angled PC SC Connector (Suffix Code:-ASC)

•

Use the same type of angled PC SC connector for the connected optical fiber

cable as well. The ferrule end of the angled PC SC connector is polished to an angle. I

other types of connectors are used, the end face of the connector may become

damaged.

• You can replace the

AQ7270/AQ7275 connector, but only with an SC type.

See below for operating environment limitations.

CAUTION

This product is a Class A (for industrial environments) product. Operation of this product in a residential area may cause radio interference in which case the user will be required to correct the interference.

IM 735020-01E

vii

Safety Precautions

INVISIBLE LASER RADIATION DO NOT VIEW DIRECTY WITH OPTICAL INSTRUMENTS CLASS 1M LASER PRODUCT (IEC 60825-1:2007)

Laser Class 1M Label

If the laser output is observed at a distance of 100mm or less from the laser beam emitting part by means of optical method (loupe, magnifying glass, microscope, etc.), this may cause eye injury.

VISIBLE LASER RADIATION AVOID DIRECT EYE EXPOSURE CLASS 3R LASER PRODUCT (IEC 60825-1:2007) MAX OUTPUT WAVELENGTH 5mW 650±20nm

Laser Class 3R Label

Avoid direct eye exposure

Safety Precautions for Laser Products

This instrument uses a laser light source. This instrument is a Class 1M laser product as defined by IEC60825-1 Safety of Laser Products-Part 1: Equipment Classification, Requirements and User’s Guide. In addition, the AQ7270/AQ7275 complies with 21 CFR 1040.10 except for the items that deviate from the standard as a result of complying with Laser Notice No.50 dated on June 24, 2007.

MODEL Class Center Wavelength Output Power

735020 1M 1550nm CW: ≤5mW@1550nm    PULSE: ≤200mW@1550nm    PULSEwidth:≤20us@1550nm(dutycycle:≤2.5%) 735021 1M 1650nm CW: ≤5mW@1650nm    PULSE: ≤32mW@1650nm    PULSEwidth:≤20us@1650nm(dutycycle:≤2.5%) 735022 1M 1310/1550nm CW: ≤5mW@1310/1550nm    PULSE: ≤200mW@1310/1550nm    PULSEwidth:≤20us@1310/1550nm(dutycycle:≤2.5%) 735023 1M 1310/1550nm CW: ≤5mW@1310/1550nm    PULSE: ≤200mW@1310/1550nm    PULSEwidth:≤20us@1310/1550nm(dutycycle:≤2.5%) 735024 1M 1550/1625nm CW: ≤5mW@1550/1625nm    PULSE: ≤200mW@1550/1625nm    PULSEwidth:≤20us@1550/1625nm(dutycycle:≤2.5%) 735025 1M 1310/1490/1550nm CW: ≤5mW@1310/1490/1550nm    PULSE: ≤200mW@1310/1490/1550nm    PULSEwidth:≤20us@1310/1490/1550nm(dutycycle:≤2.5%) 735026 1M 1310/1550/1625nm CW: ≤5mW@1310/1550/1625nm    PULSE: ≤200mW@1310/1550/1625nm    PULSEwidth:≤20us@1310/1550/1625nm(dutycycle:≤2.5%) 735027 1M 1310/1550/1650nm CW: ≤5mW@1310/1550/1650nm    PULSE: ≤200mW@1310/1550nm    PULSE: ≤32mW@1650nm    PULSEwidth:≤20us@1310/1550/1650nm(dutycycle:≤2.5%) 735028 1M 1310/1550/1625nm CW: ≤5mW@1310/1550/1625nm    PULSE: ≤200mW@1310/1550/1625nm    PULSEwidth:≤20us@1310/1550/1625nm(dutycycle:≤2.5%)

viii

IM 735020-01E

Safety Precautions

MODEL Class Center Wavelength Output Power

735029 1M 850/1300nm PULSE: ≤50mW@850nm         ≤100mW@1300nm    PULSEwidth:≤1us@850nm(dutycycle:≤5%)

    ≤5us@1300nm(dutycycle:≤0.6%) 735030 1M 850/1300nm PULSE: ≤50mW@850nm    

    ≤100mW@1300nm    PULSEwidth:≤1us@850nm(dutycycle:≤5%)     ≤5us@1300nm(dutycycle:≤0.6%)   1310/1550nm CW: ≤5mW@1310/1550nm    PULSE: ≤200mW@1310/1550nm    PULSEwidth:≤20us@1310/1550nm(dutycycle:≤2.5%) 735031 1M 1650nm CW: ≤5mW@1650nm    PULSE: ≤32mW@1650nm    PULSEwidth:≤20us@1650nm(dutycycle:≤2.5%)  3R 650nm CW: ≤5mW@650nm 735032 1M 1310/1550nm CW: ≤5mW@1310/1550nm    PULSE: ≤200mW@1310/1550nm    PULSEwidth:≤20us@1310/1550nm(dutycycle:≤2.5%)  3R 650nm CW: ≤5mW@650nm 735033 1M 1310/1550nm CW: ≤5mW@1310/1550nm    PULSE: ≤200mW@1310/1550nm    PULSEwidth:≤20us@1310/1550nm(dutycycle:≤2.5%)  3R 650nm CW: ≤5mW@650nm 735034 1M 1310/1550nm CW: ≤5mW@1310/1550nm    PULSE: ≤200mW@1310/1550nm    PULSEwidth:≤20us@1310/1550nm(dutycycle:≤2.5%)  3R 650nm CW: ≤5mW@650nm 735035 1M 1310/1490/1550nm CW: ≤5mW@1310/1490/1550nm    PULSE: ≤200mW@1310/1490/1550nm    PULSEwidth:≤20us@1310/1490/1550nm(dutycycle:≤2.5%)  3R 650nm CW: ≤5mW@650nm 735036 1M 1310/1550/1625nm CW: ≤5mW@1310/1550/1625nm    PULSE: ≤200mW@1310/1550/1625nm    PULSEwidth:≤20us@1310/1550/1625nm(dutycycle:≤2.5%) 735037 1M 1310/1550/1650nm CW: ≤5mW@1310/1550/1650nm    PULSE: ≤200mW@1310/1550nm    PULSE: ≤32mW@1650nm    PULSEwidth:≤20us@1310/1550/1650nm(dutycycle:≤2.5%) 735038 1M 1310/1550/1625nm CW: ≤5mW@1310/1550/1625nm    PULSE: ≤200mW@1310/1550/1625nm    PULSEwidth:≤20us@1310/1550/1625nm(dutycycle:≤2.5%)  3R 650nm CW: ≤5mW@650nm 735040 1M 850/1300nm PULSE: ≤50mW@850nm,PULSE:≤100mW@1300nm    PULSEwidth:≤1us@850nm(dutycycle:≤5%)     ≤5us@1300nm(dutycycle:≤0.6%)   1310/1550nm CW: ≤5mW@1310/1550nm    PULSE: ≤200mW@1310/1550nm    PULSEwidth:≤20us@1310/1550nm(dutycycle:≤2.5%) 735041 1M 850/1300nm PULSE: ≤50mW@850nm,PULSE:≤100mW@1300nm    PULSEwidth:≤1us@850nm(dutycycle:≤5%)     ≤5us@1300nm(dutycycle:≤0.6%)   1310/1550nm CW: ≤5mW@1310/1550nm    PULSE: ≤200mW@1310/1550nm    PULSEwidth:≤20us@1310/1550nm(dutycycle:≤2.5%)

IM 735020-01E

If the instrument is used in a manner not specified in this manual, the protection provided by the instrument may be impaired. Yokogawa Electric Corporation assumes no liability for the customer’s failure to comply with these requirements.

Waste Electrical and Electronic Equipment

Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC

(This directive is only valid in the EU.) This product complies with the WEEE Directive (2002/96/EC) marking

requirement. This marking 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 1, this

product is classified as a “Monitoring and Control instrumentation” product.

Do not

dispose in domestic household waste. When disposing products in the EU,

contact your local Yokogawa Europe B. V. office.

IM 735020-01E

Symbols and Notation Used in This Manual

Safety Markings

The following markings are used in this manual.

Improper handling or use can lead to injury to the user or damage

to the instrument. This symbol appears on the instrument to indicate that the user must refer to the users manual for special instructions. The same symbol appears in the corresponding place in the user’ s manual to identify those instructions. In the manual, the symbol is used in conjunction with the word “WARNING” or “CAUTION.”

WARNING

CAUTION

Calls attention to information that is important for proper operation of

Note

Calls attention to actions or conditions that could cause serious or

fatal injury to the user, and precautions that can be taken to prevent such occurrences.

Calls attention to actions or conditions that could cause light injury

to the user or damage to the instrument or the user’s data, and precautions that can be taken to prevent such occurrences.

the instrument.

Notations Used on Pages Describing Operating Procedures

On pages that describe the operating procedures in chapters 4 through 19, the following displayed characters, and terminology are used to distinguish the procedures from their explanations.

Procedure

Explanation

Carry out the procedure according to the step numbers. All

procedures are written with inexperienced users in mind; experienced users may not need to carry out all the steps.

This section describes the setup items and the limitations regarding

the procedures. It may not give a detailed explanation of the function. For a detailed explanation of the function, see chapter 2.

Unit

IM 735020-01E

Displayed Characters and Terminology Used in the Procedural Explanations

Panel Keys and Soft keys

Bold characters used in the procedural explanations indicate characters that are marked on the panel keys or the characters of the soft keys or menus displayed on the screen.

k Denotes 1000. Example: 12 kg, 100 kHz

Checking the Contents of the Package.............................................................................................ii

Safety Precautions ............................................................................................................................v

Waste Electrical and Electronic Equipment ......................................................................................x

Symbols and Notation Used in This Manual ....................................................................................xi

Chapter 1 Names and Functions of Parts

1.1 Front Panel ....................................................................................................................... 1-1

1.2 Rear Panel ....................................................................................................................... 1-2

1.3 Side Panel ........................................................................................................................

1.4 Display ..............................................................................................................................

Chapter 2 Measurement Overview

2.1 MeasurementConguration ............................................................................................. 2-1

2.2 Measurement Procedure .................................................................................................. 2-4

2.3 Viewing the Optical Pulse Measurement W

2.4 Distance Measurement ...................................................................................................2-11

Chapter 3 Measurement Preparation

3.1 Connecting the Power Supply .......................................................................................... 3-1

3.2 Connecting the Optical Fiber Cable ................................................................................. 3-5

3.3 Setting the Date and T

3.4 Loading the Printer Roll Paper (Option) ........................................................................... 3-9

3.5 Connecting the USB Interface ........................................................................................ 3-10

3.6 Connecting the Ethernet Interface (Option) .....................................................................3-1

3.7 Attaching the Belt ........................................................................................................... 3-12

ime ................................................................................................ 3-7

1-3 1-5

aveform ........................................................ 2-9

Chapter 4 Setting the Optical Pulse Measurement Conditions (Simple Full Auto

Mode)

4.1 Selecting the Test Wavelength ......................................................................................... 4-1

4.2 Selecting the Approximation Method ................................................................................ 4-3

4.3 Setting Other Items ......................................................................................................

.... 4-4

Chapter 5 Setting the Optical Pulse Measurement Conditions (Measurement

Wizard Mode)

5.1 Setting the Measurement Conditions ............................................................................... 5-1

5.2 Setting the Analysis Conditions ........................................................................................ 5-8

5.3 Setting

5.4 Setting the File ......................................................................................................

theDetectionConditionsofReectionandLossWaveforms .............................5-11

......... 5-16

Chapter 6 Setting the Optical Pulse Measurement Conditions (Detail Mode

(Manually Setting All Items))

6.1 Setting the Measurement Conditions ............................................................................... 6-1

6.2 Setting the Analysis Conditions ...................................................................................... 6-16

6.3 Setting the Multi Wavelength Measurement Conditions .................................................

6.4 Setting the Multi Wavelength

Analysis Conditions .......................................................... 6-25

6-22

xii

IM 735020-01E

Contents

Index

App

Chapter 7 Executing the Optical Pulse Measurement (Acquiring Waveforms)

7.1 Realtime Measurement .................................................................................................... 7-1

7.2 Averaging Measurement .................................................................................................. 7-5

7.3 Displaying the Measurement Conditions .......................................................................... 7-7

7.4 High Resolution Measurement of the Selected Location ................................................. 7-8

7.5 Measuring Multicore Fiber ...............................................................................................7-11

7.6 Warm-up Measurement .................................................................................................. 7-28

Chapter 8 Zooming the Waveform

8.1 Zooming the Display ......................................................................................................... 8-1

8.2 Moving the Waveform ....................................................................................................... 8-2

8.3 Initializing the Waveform Display ......................................................................................

8.4 Auto Zoom the Waveform Display ....................................................................................

8-3 8-4

Chapter 9 Macro Measurement

9.1 CreatingtheMeasurementConditions(DeningtheMacroConditions) ......................... 9-1

9.2 Saving the Macro Measurement Results ......................................................................... 9-3

9.3 Loading the Measurement Conditions .............................................................................. 9-9

9.4 Executing the Macro .......................................................................................................

9.5 Saving/Loading Macro Conditions .................................................................................. 9-13

Chapter 10 Measuring the Distance

10.1 Marker and Cursor Operation ......................................................................................... 10-1

10.2 Measuring the Distance .................................................................................................. 10-9

10.3 Moving the Measurement Reference ........................................................................... 10-12

Chapter 11 Measuring the Splice and Return Loss

11.1 Measuring the Splice Loss ..............................................................................................11-1

11.2 Measurement Taking the Adjacent Splice Loss into Consideration .................................11-7

11.3 Measuring

theReturnLossandReectionLevel ............................................................11-9

Chapter 12 Editing the Event List

12.1 Viewing the Measured Results ....................................................................................... 12-1

12.2 Editing the Waveform ..................................................................................................... 12-3

12.3 Editing the List ..............................................................................................................

Chapter 13 Detail Analysis of the Measured Waveform

13.1 Displaying the Multiple Waveforms ................................................................................ 13-1

13.2 2-Way Trace ................................................................................................................... 13-4

13.3 Difference W

13.4 Section Analysis ......................................................................................................

13.5 Fixing the Waveform

aveform ...................................................................................................... 13-9

..................................................................................................... 13-14

Chapter 14 Optical Power Monitoring (Option)

14.1 Calibration before the Measurement .............................................................................. 14-1

14.2 Setting the Reference ..................................................................................................... 14-2

14.3 Selecting the Display Unit .............................................................................................. 14-3

14.4 Selecting the W

14.5 Setting the Offset .......................................................................................................

14.6 Set the Threshold Level

avelength ...............................................................................................

.................................................................................................. 14-6

9-11

12-14

..... 13-12

14-4

..... 14-5

IM 735020-01E

xiii

Contents

Chapter 15 Light Source Operation (Option)

15.1 Light and Stabilized Light Source ................................................................................... 15-1

15.2 Visible Light Source ........................................................................................................ 15-3

Chapter 16 Checking Fiber End Faces

16.1 Using Fiber Inspection Probes to View the Status of Optional Fiber End Faces. .......... 16-1

Chapter 17 Multi Core Trace Comparison

17.1 Measuring Optical Pulses before Work and after Work .................................................. 17-1

17.2 ConguringtheCoreInformation ................................................................................. 17-10

17.3 Setting Measurement Conditions ................................................................................. 17-15

17.4 Setting

Analysis Conditions ..........................................................................................

Chapter 18 Saving, Loading, and Printing Files

18.1 Loading and Saving Files ............................................................................................... 18-1

18.2 Deleting or Copying the Files ......................................................................................... 18-8

18.3 Renaming the File ........................................................................................................

18.4 Creating, Deleting, and Copying Folders ..................................................................... 18-14

18.5 Printing ......................................................................................................

18.6 Entering Characters ..................................................................................................... 18-21

18.7 Creating Labels ......................................................................................................

18.8 Initializing (formatting) the internal memory ................................................................. 18-29

...................

......

17-16

18-12

18-18

18-23

Chapter 19 Other Settings

19.1 Setting the System ......................................................................................................... 19-1

19.2 Setting the Display ......................................................................................................... 19-9

19.3 Setting the Network (/PL Option)

19.4 Network File T

19.5 Cable

InstallationCompletionNotication .................................................................... 19-23

ransfers ................................................................................................. 19-22

.................................................................................. 19-18

Chapter 20 Troubleshooting, Maintenance, and Inspection

20.1 Troubleshooting .............................................................................................................. 20-1

20.2 Error Messages .............................................................................................................. 20-2

20.3 Self T

20.4 Updating the Firmware ................................................................................................... 20-8

20.5 Mechanical Inspection .................................................................................................. 20-10

20.6 Checking the Operation .................................................................................................20-1

20.7 Replacing the Battery Pack ..........................................................................................

20.8 Replacing the Optical

20.9 Routine Maintenance ................................................................................................... 20-17

20.10 Storage Precautions ..................................................................................................... 20-18

20.11

Recommended Replacement Parts .............................................................................

20.12 Calibration ....................................................................................................................

est .......................................................................................................................... 20-7

Adapter

...................................................................................... 20-15

Chapter 21 Specications

21.1 Models ............................................................................................................................ 21-1

21.2 Optical Section ............................................................................................................... 21-2

21.3 General

21.4 External Dimensions .................................................................................................... 21-10

Specications ................................................................................................... 21-8

20-12

20-19 20-20

xiv

IM 735020-01E

Appendix

Index

App

Contents

Appendix 1 Terminology ........................................................................................................ App-1

Appendix 2 Key Assignments for the USB104 Keyboard ......................................................App-6

Appendix3

Exampleofleinput/output ................................................................................ App-7

Index

IM 735020-01E

OPTICAL INPUT

F 1

F 2

F 3

F 4

F 5

ESC

FILE

SCALE

ENTER

SETUP

REAL TIME

AVG

CHARGE

2 3

5 6

Chapter 1 Names and Functions of Parts

1.1 Front Panel

Names and Functions of Parts

IM 735020-01E

Number Name Function

1 LCD Displays the measured waveforms, measurement conditions, etc. 2 ESC key Cancels an operation or returns to the previous display.

3 FILE key Operate files and print waveforms. Some also used as soft keys.

4 CHARGE lamp Lights (green) while the battery pack is fast charging. Turns OFF when the battery pack is finished fast charging. Blinks (green) if the battery pack cannot be fast charged. 5 POWER switch Turns the instrument on/off 6 POWER lamp Illuminates while the instrument is turned on (green). When the battery level is low (red). 7 AVERAGE key Starts or stop the averaging measurement. 8 REALTIME key Starts or stop the realtime measurement. 9 SETUP key Sets measurement conditions and system configuration.

Also used to change the event detection conditions for event analysis.

Arrow keys Moves, expands, and reduces waveforms, moves cursors,

10 etc.

11 ENTER key Confirms the operation 12 SCALE key Expands, reduces, and moves waveforms. 13 Rotary knob Moves cursors and markers, sets values, etc. 14 MENU key Returns to the initial screen at startup. (Selects OTDR, optical power monitor, light source, and

one-button measurement.) 15 Soft keys Executes functions that are assigned to the soft keys

displayed at the right edge of the LCD.

1-1

1.2 Rear Panel

Number Name Function

1 Stand Tilts the instrument.

Note

• The /PL option does not come with a stand.

• Do not use the stand as a handle to carry the AQ7270/AQ7275.

• Use the stand only to tilt the AQ7270/AQ7275.

• If you are tilting the AQ7270/AQ7275, check that the stand is fixed in place.

1-2

IM 735020-01E

1.3 Side Panel

/PL Option

Top View

Names and Functions of Parts

Number Name Function

1 DC power connector Connects the AC adapter. 2 Optical connector Connects the optical fiber cable. *1 3 USB 1.1 connector (Type A) Connects a USB memory, USB printer, the USB104 keyboard etc. 4 USB 1.1 connector (Type B) 5 Internal printer Prints waveforms and event lists.(/PL option) 6 Printer paper feed button Feeds the paper.(/PL option) 7 Ethernet connector Used for remote control.(/PL option) 8 Battery pack storage Stores the battery pack.

*1 The /PM option supports only PORT1. PORT2 (MMF) and 1650-nm wavelength are not supported.

Used for remote control, storage, etc.

IM 735020-01E

1-3

/PL option

1.3 Side Panel

Right View

Number Name Function

1 Printer cover Stores the paper. 2 Lock lever Fixes the printer cover in place. 3 Shoulder belt bracket Attaches the shoulder belt. 4 Hand belt bracket Attaches the hand belt.

1-4

IM 735020-01E

1.4 Display

Top Menu

Names and Functions of Parts

Number Function

1 Optical pulse measurement (OTDR) screen. 2 Optical power monitor screen (/PM option). 3 Light source screen (/LS /SLS option). 4 Visible Light source screen (/VLS option). 5 Displays the soft key menu. 6 One-button measurement screen. 7 multicore fiber measurement ( 8 Displays the fiber inspection probe screen.

Displays the Multi Core Trace Comparison (main view) screen (firmware versions 3.01

and later).

main view display) screen.

IM 735020-01E

1-5

A shaded area

1.4 Display

Note

Displays a shaded area when the option is not installed (firmware version 3.01 or later).

1-6

IM 735020-01E

1516 17

1.4 Display

Optical Pulse Measurement (OTDR)

Names and Functions of Parts

Number Function

1 Displays the value per scale mark on the vertical axis. 2 Shows the display start level of the vertical axis (top edge of the waveform display area) 3 Waveform display area 4 Displays the value per scale mark on the horizontal axis. 5 Shows the display start distance of the horizontal axis (left edge of the waveform display area) 6 Displays the distance from the measurement reference point of the horizontal axis to the cursor position. 7 Displays the measurement conditions. 8 Displays an explanation of the function 9 Displays the computed result of the measured data. 10 Displays the full screen of the waveform display area. The section displayed in the

waveform display area is indicated with a frame (overview).When adjusting the scale using Zoom or Shift, the color of the frame is different. When you press Shift, the word

“SHIFT” is displayed at the upper right of the overview screen. 11 Displays the sampling resolution. 12

Shows the display end distance of the horizontal axis (right edge of the waveform

display area) 13 Displays the soft key menu. 14 Displays the type of power in use (battery pack or AC adapter) 15 Displays the cursor movement setting. 16 Displays the approximation method. 17 Displays in red the connector in which the optical pulse is output. 18 Displays the progress of the averaging measurement (AVE).Displays a bar graph

indicating the progress in the 19 Label area. The name of the next file to be saved blinks if auto save is turned ON. 20 Displays the operating status of the instrument.

While the optical pulse output is ON: “LASER ON” is indicated and the text ckground

blinks.

While the optical pulse output is OFF: Operation mode (Simple (Full Auto),

measurement Wizard, Detail, or Multi WL) 21 Displays the year, month, day, and time. 22 FILE name area

text background.

IM 735020-01E

1-7

1 2

1.4 Display

Optical Power Monitor(/PM option)

Number Function

1 Displays numerically the optical input power value. 2 Displays a graph of the optical input power value. 3 Measurement condition display area 4 Soft key menu

Light Source(/LS, /SLS option)

1-8

Number Function

1 Displays the wavelength value. 2 Measurement condition display area 3 Soft key menu

IM 735020-01E

1.4 Display

Visible Light source (/VLS option)

Number Function

1 Displays the wavelength value. 2 Soft key menu

Names and Functions of Parts

One-Button Measurement

Number Function

1 Displays the contents of the macro that is being defined (used to enter the macro while viewing the contents). 2 Soft key menu

IM 735020-01E

1-9

1.4 Display

Fiber Inspection Probe

Number Function

1 Displays the fiber inspection probe screen. 2 Soft key menu

Multi Core Trace Comparison (Firmware Versions 3.01 and Later)

Number Function

1 Displays the number of the core of the optical fiber cable under measurement. 2 Displays the soft key menu. 3 Displays the information of the cell that the cursor is at. 4 Displays the waveform before work and the waveform after work at the same time.

1-10

IM 735020-01E

Telephone pole

Closure

Optical fiber cable

Telephone exchanges

Measurement in cable installations

AQ7270/AQ7275 OTDR

Consumer

Corporate user

Chapter 2

Measurement Overview

2.1 Measurement Configuration

Overview of the AQ7270/AQ7275

The AQ7270/AQ7275 is an optical time domain reflectometer that measures optical fiber lengths and losses and identifies failure locations. It is mainly used in the optical fiber installation and maintenance servicing of access networks (communications links between telephone exchanges and telephone poles) and user networks (communications links between user sites and telephone poles). The light source and optical power monitor functions can also be used as options.

Measurement Overview

Analysis Using the Emulation Software

The waveform data that is measured by the AQ7270/AQ7275 can be analyzed on your PC using the AQ7932 OTDR emulation software (version 3.0 or later). The software comes with a report creation wizard that is convenient in creating construction reports.

Precautions for Measurement

When Measuring with the Same Wavelength as the Communication Light

When Measuring with a Wavelength Different from Communication Light (1625/1650 nm)

When there is communication light in the fiber under test, use a wavelength different from the communication light for measurement.

IM 735020-01E

The instrument is designed to allow measurement that impacts communication as little as possible in such cases, but be sure to install a cutoff filter of 1625 nm or 1650 nm in system under test. If measurements are taken without a cutoff filter installed, communications can be affected and measurements may not be correct. Always check the configuration of the system under test before use (presence or absence of an appropriate cutoff filter, attenuation characteristics, etc.).

2-1

Ethernet connector (remote control)

USB connector (remote control and storage)

USB printer

USB connector

USB memory

DUT

Optical connector PORT2 (wavelength *1: 650 nm, 850 nm, 1300 nm, and 1650 nm)

Optical connector PORT1 (wavelength *2: 1310 nm, 1490 nm, 1550 nm, and 1625 nm)

DUT

AC adapter

The 735021 and 735031 output 1650 nm from PORT1. The 735029 outputs 850 nm and 1300 nm from PORT1. The /PM option supports only PORT1. PORT2 (MMF) and 1650-nm wavelength are not supported.

USB104 keyboard

The 735036 outputs 1650 nm from PORT2.

2.1 Measurement Configuration

Configuration of Peripheral Devices

2-2

IM 735020-01E

Optical Pulse Measurement (OTDR) Configuration

Reflection point

Battery pack

Optical fiber cable under measurement

Optical pulse output

Return ray due to reflection

* Do not bend the optical fiber cable.

[PORT1][PORT2]

Install the battery pack and connect the optical fiber cable under measurement.

There are two optical connectors on the top panel of the AQ7270/AQ7275.Because the connector that delivers the optical pulse is fixed depending on the wavelength, connect the cable to the appropriate connector according to the condition of the optical fiber cable to be measured. You can view the indicator shown on the display (see page 1-5) to choose the appropriate connector.

2.1 Measurement Configuration

Measurement Overview

This also applies when using the optional optical power monitor or light source function.

Note

• The 735021 outputs 1650 nm from PORT1.

• The 735029 outputs 850 nm and 1300 nm from PORT1.

• The /PM option supports only PORT1. PORT2 (MMF) and 1650-nm wavelength are not supported.

When Using the Angled PC SC Connector (Suffix Code:-ASC)

• Use the same type of angled PC SC connector for the connected optical fiber cable as well.

The ferrule end of the angled PC SC connector is polished to If other types of connectors are used, the end face of the connector may become

damaged.

• You can replace the

an angle.

AQ7270/AQ7275 connector, but only with an SC type.

IM 735020-01E

2-3

2.2 Measurement Procedure

Measurement Preparation

Measurement Condition Setup (Select from the Following Three)

Waveform Display Conditions

Connect the power supply and turn it ON/OFF

Connect the optical fiber cables

Set the date and time

Load the printer paper

When setting only the wavelength and using auto setup for other items (full auto mode)

When setting measurement conditions using the wizard (measurement wizard mode)

When specifying all items (detail mode)

• Expand or reduce

• Move the waveform

• Display the grid and information

Waveform Analysis

• Measure the distance

• Measure the splice loss and return loss

• Editing the waveform

• Analyze multiple waveforms

Waveform Printing and Storage

• Print the display image

• Save various types of data

Section 3.1

Section 3.2

Section 3.3

Section 3.4

Chapter 4

Chapter 5

Chapter 6

Section 8.1 Section 8.2 Section 19.2

Section 18.5 Sections 18.1 to 18.4

One-Button Measurement

Select a macro and execute

Section 9.3

Waveform Acquisition

• Realtime measurement

• Averaging measurement

Section 7.1 Section 7.2

Multicore Fiber Measurement

Create a project and execute

Section 7.5

Chapter 10 Chapter 11 Section 12.2 Chapter 13

Flow of Operation

The figure below is provided to familiarize the first-time user with the general flow of the AQ7270/AQ7275 operation. For details on each item, see the relevant section or chapter.

2-4

IM 735020-01E

2.2 Measurement Procedure

One-Button Measurement <<For procedures, see section 9.3.>>

If you enter the settings such as the optical pulse measurement conditions, waveform acquisition mode, and data format for storage in advance, you can carry out the measurement and storage through a single-step operation. If you enter multiple sets of settings such as the wavelengths to be measured, you can carry out measurements sequentially using different measurement conditions through one-step operation.

Easy Setting of Measurement Conditions

There are three modes for setting the measurement conditions: Detail, Measurement Wizard, and Full Auto. In Detail mode, the user sets each measurement condition as in the past. In Measurement Wizard mode, a wizard is displayed when the user sets each measurement condition. This feature is convenient for users that are not used to the work. In Full Auto mode, all optical pulse measurement conditions are automatically set when you select the wavelength to be measured, and the measured waveform is displayed. This feature is convenient when you are not sure about the installation conditions of the optical fiber cable.

Waveform Acquisition and Measurement Using Markers and Cursors

The AQ7270/AQ7275 has the following two measurement functions.

• Acquire the waveform

• Position markers or cursors on the acquired waveform and measure the values.

Measurement Overview

Multi Wavelength Measurement <<For procedures, see section 6.3 and 6.4.>>

The multi wavelength measurement is performed on the following wavelengths: 850nm, 1300nm, 1310 nm, 1490 nm, 1550 nm, and 1625 nm. Measurement at multiple wavelengths can be carried out continuously. The number of wavelengths that can be measured and waveforms that can be displayed differs depending on the model (up to 3 waveforms).

Measuring Multicore Fiber <<For procedures, see section 7.5.>>

Specialized screens (Main View Screen) and menus for multicore fiber measurements appear, enabling you to efficiently measure multicore fibers without data loss.

IM 735020-01E

2-5

Measurement Preparation

Configure the core information

Configure settings such as the number of cores and how to assign numbers.

Set the measurement conditions

Set conditions such as the wavelength and the distance range.

Set the analysis conditions

Set conditions such as the group refraction index and the reference waveform (before work).

Section 17.2

Section 17.3

Section 17.4

Measurements before Work

Measure the optical pulse

Measure cores numbered 1 to 100 (maximum) in order.

Section 17.1

Measurements after Work

Measure the optical pulse (core number 1)

Measure core number 1.

Check the measured waveform

Perform a visual check of the core number 1 waveform and the waveform before work (the reference).

Analyze the measured waveform (if necessary)

Use markers or line markers to perform calculations on the core number 1 waveform, and check the events as numeric values.

Measure the optical pulse (core number 2 and greater)

Repeat the checks listed above for cores numbered 2 to 100 (maximum).

Section 17.1

2.2 Measurement Procedure

Multi Core Trace Comparison (Firmware Versions 3.01 and Later) <<For procedures, see chapter 17.>>

When installed fibers are moved because of road work or other external factors, you can efficiently perform measurements by using this function. The following three measurement methods are available, each of which checks the quality of the optical pulse measurement waveform after work.

•

Visual check of the waveform before work and the waveform a

• Visual check using a waveform of one fiber within the same tape as the reference

• Automatic pass/fail judgment using pass/fail markers

Visual Check of the Waveform before Work and the Waveform after Work

fter work

2-6

IM 735020-01E

Measurement Preparation

Configure the core information

Configure settings such as the number of cores and how to assign numbers.

Set the measurement conditions

Set conditions such as the wavelength and the distance range.

Set the analysis conditions

Set conditions such as the group refraction index and the reference waveform (tapes a to j).

Section 17.2

Section 17.3

Section 17.4

Measurements before Work

Measure the optical pulse

Measure 12 tapes worth of waveforms— the cores numbered 1a to 12a (maximum) of the tape ID—in order (in this example, tape a is the reference waveform).

Section 17.1

Measurements after Work

Measure the optical pulse (1a of tape 1) Measure the core numbered 1a of tape 1.

Check the measured waveform

Perform a visual check of the core number 1a waveform of tape 1 and the waveform before work (the reference).

Analyze the measured waveform (if necessary)

Use markers or line markers to perform calculations on the core number 1a waveform of tape 1, and check the events as numeric values.

Measure the optical pulse (1b and greater of tape 1)

Perform a visual check of the core number 1b waveform and the core number 1a waveform of tape 1 (the reference is tape a). Perform the same visual check using the 1c and greater waveforms and the 1a waveform.

Measure the optical pulse (tape 2 and greater)

Repeat the checks listed above.

Section 17.1

2.2 Measurement Procedure

Visual Check Using a Waveform of One Fiber within the Same Tape as the Reference

Measurement Overview

IM 735020-01E

2-7

Measurement Preparation

Configure the core information

Configure settings such as the number of cores and how to assign numbers.

Set the measurement conditions

Set conditions such as the wavelength and the distance range.

Configure the pass/fail markers

Position markers above the events (2 markers, 4 markers, or 5 markers method), set the threshold levels, and configure other settings.

Section 17.2

Section 17.3

Section 17.4

Measurements after Work

Measure the optical pulse

Measure cores numbered 1 to 100 (maximum) in order. Each time that the measurement of a core is completed, the AQ7270/AQ7275 automatically performs a pass/fail measurement and displays the results on the screen.

Section 17.1

2.2 Measurement Procedure

Automatic pass/fail judgment using pass/fail markers

2-8

IM 735020-01E

2.3 Viewing the Optical Pulse Measurement

Incident ray

Backscattering light

Fused connection point

Connector connection point

Bending

Open end

Near-end reflection

Splice loss due to fusion

Approximation line

Reflection due to Connector Connection

Loss due to bending

Open end reflection (Fresnel reflection)

Dynamic range(SNR=1)

Small material

Incident ray

Backscattering light

Optical fiber cable

Waveform

Measurement Overview

An optical pulse that enters the optical fiber cable incurs loss due to reflection at the connection points, etc. The measured result is displayed with the distance along the horizontal axis and loss level along the vertical axis. Waveform refers to the display of this result on the AQ7270/AQ7275. The losses and reflections detected on the waveform are called events.

Near-End Reflection

A reflection occurs in the connection point between the AQ7270/AQ7275 and the connector for the optical fiber cable. This section also includes the internal reflection of the OTDR. Losses and reflections of the connection points cannot be detected in the section in which this reflection is detected. This section is called a near-end dead zone. If the near-end reflection affects the measurement of a short distance, connect a dummy fiber provided as an option to clear the effects.

Loss by the Optical Fiber Cable due to Rayleigh Scattering

When light propagates through the optical fiber cable, a phenomenon called Rayleigh Scattering occurs due to the nonuniformity of the density or constituents of materials smaller than the wavelength unit. The scattered light that is transmitted opposite to the direction of propagation is called backscattering light.

IM 735020-01E

2-9

Optical fiber cable

Gap

Connector

Glass Air

Incident ray (100%)

Reflected ray (3%)

Light (97%)

Measurement waveform

Noise peak

2.6 dB RMS level of noise

Dynamic range

(SNR=1)

2.3 Viewing the Optical Pulse Measurement Waveform

Splice Loss due to Fusion

Because the unevenness in the density or constituents of the materials in the fused section becomes large, the loss due to Rayleigh Scattering increases, and a splice loss occurs.

Reflection due to Connector Connection

Unlike the fused section, a slight gap occurs in the connection section of connectors. Because the group refraction index changes in this gap, a reflection occurs causing a loss.

Fresnel Reflection at the Far End of the Optical Fiber Cable

Fresnel reflection occurs at the location where the optical fiber cable is broken or a location where the group refraction index changes such as the far end of the cable (glass and air) when light enters the cable. If the end face of the optical fiber cable is vertical,

approximately

%(–14.7dB)oftheincidentlightpowerisreflected.

3

Dynamic Range

2-10

The backscattering light level that the AQ7270/AQ7275 can measure.

IM 735020-01E

2.4 Distance Measurement

Accuracy

The AQ7270/AQ7275 calculates the distance (L) by measuring the time until the transmitted light pulse returns and using the equation indicated below. L = C×T/(2N) [m]

The speed of light travelling through a vacuum.

The time from when the pulse is transmitted until the light returns.

N: Group refraction index The reason why the equation divides by 2 is because the round-trip time of the optical pulse is measured. An error will occur in the distance measurement unless an accurate group refraction index is specified.

Group Refraction Index Settings

The following group refraction indexes are assigned according to the wavelength on the AQ7270/AQ7275.

850 nm: 1.46000

1300 nm: 1.46000

1310 nm:

1490 nm: 1.46000

1550 nm:

1625 nm: 1.46000

1650 nm: 1.46000 The selectable range is 1.30000 to 1.79999. For the accurate group refraction index, check with the manufacturer of the optical fiber cable.

1.46000

Measurement Overview

Optical Fiber Cable Length and Distance Range

Select a distance range that is longer than the optical fiber cable you want to measure. If the distance range is longer, the measurement time also increases accordingly.

Cable Length Distance Range

Unknown Auto

0 to 400 m 500 m

400 m to 800 m 1 km

800 m to 1.6 km 2 km

1.6 km to 4 km 5 km

4 km to 8 km 10 km

8 km to 16 km 20 km

16 km to 40 km 50 km

40 km to 80 km 100 km

80 km to 160 km 200 km

160 km to 240 km 300 km

IM 735020-01E

2-11

Pulse width

Event dead zone

Attenuation dead zone

1.5 dB

2.4 Distance Measurement

Selectable Pulse Widths for the Distance Measurement

The pulse width has the following characteristics.

Short pulse width: Allows events (reflection point and loss) that are close together to be measured separately. However, long distance cannot be measured. Long pulse width: Long distance can be measured. However, multiple events that

are close together may appear as a single event.

Distance Range Selectable Pulse Widths

500 m 3 ns, 10 ns, 20 ns, 50 ns, 100 ns, 200 ns, 500 ns 1 km 3 ns, 10 ns, 20 ns, 50 ns, 100 ns, 200 ns, 500 ns, 1 ms 2 km 3 ns, 10 ns, 20 ns, 50 ns, 100 ns, 200 ns, 500 ns, 1 ms 5 km 3 ns, 10 ns, 20 ns, 50 ns, 100 ns, 200 ns, 500 ns, 1 ms 10 km, 20 km 3 ns, 10 ns, 20 ns, 50 ns, 100 ns, 200 ns, 500 ns, 1 ms 50 km or longer 3 ns, 10 ns, 20 ns, 50 ns, 100 ns, 200 ns, 500 ns, 1 ms, 2 ms, 5 ms, 10 ms, 20 ms

If the wavelength is 850 nm, you cannot use 3ns, 2 ms, 5 ms, 10 ms, and 20 ms(3 ns is available on the 735041). If the wavelength is 1300 nm, you cannot use 3ns, 10 ms and 20 ms (3 ns is available on the

735041)

Dead Zone in Which the Distance Cannot Be Measured

The locations where measurements cannot be made due to the effects of connection point of connectors, etc. The following types of dead zones are available.

• Event dead zone Area in which two reflections that are close together cannot be separated.

defined by a pulse width whose level is 1.5 dB less than the peak value.

• Attenuation dead zone A zone in which the splice loss cannot be measured due to a l

A zone

arge reflection nearby.

2-12

IM 735020-01E

Optical fiber cable under measurement

Dummy fiber

Location of event occurrence

* Do not bend the optical fiber cable.

Small reflection hidden behind a large reflection

2.4 Distance Measurement

Circumventing the Near-End Dead Zone Using a Dummy Fiber

Losses and reflections of the connection points cannot be detected in the section in which a near-end reflection is detected. When measuring a short distance, connect the dummy fiber to move the events that are hidden behind the near-end reflection by the length of the dummy fiber.

Measurement Overview

Note

The AQ7270/AQ7275 OTDR product series allow a 100-m dummy fiber to be built in (/DF option).

IM 735020-01E

2-13

Chapter 3 Measurement Preparation

3.1 Connecting the Power Supply

Using the AC Adapter

WARNING

Make sure that you observe the following points before connecting the AC adapter.

Failure to do so may cause electric shock or damage to the instrument.

• Check that the AQ7270/AQ7275 is turned OFF before connec adapter.

• Use only the power cord supplied by YOKOGA

• Before connecting the power cord, ensure that the source voltage matches the rated supply voltage of the AC adapter and that it is within the maximum rated voltage of the provided power cord.

•

Use only the AC adapter specified for the instrument. When unplugging the power cord from the outlet, never pull the cord itself.

• Always hold and pull by the plug. If the power cord is damaged, contact your dealer for replacement.

•

Do not plug or unplug the AC adapter while the instrument is t

• If you are using the instrument for an extended time with the AC adapter connected, remove the battery pack from the instrument.

• If you are not going to use the instrument for an extended time, unplug the power cord of the

• Be sure nothing is placed on top of the AC adapter or power c generating objects come in contact with them.

• If an AC outlet that matches the power cord provided is unava the instrument.

AC adapter from the outlet.

WA for the instrument.

ting the AC

urned ON.

ord or let heat

ilable, do not use

Measurement Preparation

IM 735020-01E

3-1

POWER lamp

CHARGE lamp

Green: Running Red: Low battery level

Green: Fast charging in progress Green(blinking): Fast charging not started

• The battery pack is not loaded correctly in the AQ7270/AQ7275.

• Battery pack temperature not within the allowable range for fast charging.

• The battery pack is in the preliminary charging condition because the battery charge is too low for fast charging.

Check that the battery pack is loaded correctly. If the green lamp does not illuminate even after 2 or 3 hours passes with the AC adapter connected, the battery pack may be broken or reduced life.

3.1 Connecting the Power Supply

Connect the power cord to the AC adapter.

Connect the AC adapter plug to the instrument.

Connect the power plug to the outlet.

Note

If the DC power connector cover comes off, bend the axis section of the cover and attach it.

Turning the Power ON

Press the power switch on the front panel of the instrument. The POWER lamp

illuminates.

3-2

IM 735020-01E

Using the Battery Pack

Put the battery pack string way in the dented section in the back.

Push up

Pull out

WARNING

• Do not remove or insert the battery pack while being charged with the AC

• To prevent problems with the

•

Charge the battery pack using the instrument. Be sure to observe the

3.1 Connecting the Power Supply

adapter.

battery pack, periodically check the physical

appearance for cracks, deformation, and leaks.

environmental conditions when charging the battery pack. Otherwise, leaks, overheating, smoke, explosion, or fire may occur

Push up the battery pack cover lock.

Pull out the battery pack cover while pushing the lock up.

Insert the battery pack. Pay attention to the direction.

Put the battery pack string way in the dented section in the back.

Close the battery pack cover and securely lock the battery pack cover.

Measurement Preparation

Note

• Charge the battery pack in advance when using it for the first time or after long periods of non-use. The remaining battery charge may be low due to self-discharging.

• If you attempt to charge a battery pack that is overly discharged, the battery pack enters the preliminary charging condition* and it may take about 2 hours for the fast charging to start.

• The AQ7270/AQ7275 draws minute current even if the power switch is turned OFF. If you do not plan to use the AQ7270/AQ7275 for longer than a week, we recommend that you remove the battery pack from the AQ7270/AQ7275. If you do not use the AQ7270/AQ7275 for a long time with the battery pack loaded, the battery pack may become overdischarged.

* For a description of the preliminary charging condition, see “Charging Conditions of the

Battery Pack.”

IM 735020-01E

3-3

3.1 Connecting the Power Supply

Explanation

Charging Conditions of the Battery Pack

There are four charging operations

• Preliminary Charging This function is designed to reactivate a battery pack that is overly discharged or

deactivated due to temperatures lower than the specifications’ allowable range (when engaged, the CHARGE lamp blinks green). If the battery pack is overly discharged, the preliminary charge can take two hours or more. When preliminary charging is complete, fast charging begins automatically

•

Fast Charging

Normally (under standard operating conditions with a problem-free battery pack),

fast charging begins simultaneously when powering with the

chargingcharges

charging takes approximately two hours, depending on the original battery level and environmental conditions.

• Top-of This function engages immediately after fast charging, and runs on a three-

hour

provided by the fast charging function). When fast charging finishes, the CHARGE lamp goes out and the battery pack will be charged continuously for three hours. Charging of the battery pack is complete after five hours: two hours of fast charging and three hours of top-off charging.

•

Maintenance Charging

This function compensates for the battery pack’s self-discharging. If the

battery pack continues to be powered by the maintenance charging will be employed to compensate for self-discharging (when engaged, the CHARGE lamp is turned OFF).

AC adapter

thebatterypacktoupto80–90%ofitsfullcapacity.Fast

f Charging

timertobringthechargeupto100%(theremainingamountofchargenot

AC adapter after top-off charging,

. Fast

Note

The CHARGE lamp also blinks green if the battery pack is not installed or if the temperature is outside the allowable range for fast charging.

Warm-up

Allow the instrument to warm up for at least 30 minutes after turning ON the power. Sufficient warm-up produces more accurate measurements.

Overdischarging

If you do not use the AQ7270/AQ7275 for a long time with the battery pack loaded, the battery pack may become overdischarged. Please note that this can lead to reduced life of the battery pack. If not using the AQ7270/AQ7275 for one week or more, prevent overdischarging by charging the battery pack, removing it from the AQ7270/AQ7275, then storing it away

from

sunlight

more, compensate for self-discharging by charging it with the instrument once a month.

ina10–30°Cenvironment.Whenstoringthebatterypackforonemonthor

3-4

IM 735020-01E

3.2 Connecting the Optical Fiber Cable

Good example

Cleaning the Connector End Face of the Optical Fiber Cable

Clean the connector end face of the optical fiber cable under measurement before connecting it to the AQ7270/AQ7275. If dust is adhered to the connector end face, it may damage the optical connector of the AQ7270/AQ7275. If this happens, the AQ7270/ AQ7275 will not be able to make correct measurements.

Press the connector end face of the optical fiber cable firmly against the cleaning

surface of the cleaner.

Turn the cable around once with the end face pressed against the cleaner.

Rub the end face against the cleaner.

Repeat steps 1 to 3.

Measurement Preparation

Note

• If you do not press the connector end face of the optical fiber cable firmly against the cleaner, the end face may not be cleaned completely.

• You can purchase an optical fiber connector cleaner from NTT-AT corporation.

Connecting the Optical Fiber Cable to the AQ7270/AQ7275

Open the optical connector cover at the top of the AQ7270/AQ7275.

Match the direction of the optical fiber cable connector to the optical connector,

and insert it.

IM 735020-01E

3-5

Optical pulse output indicator

Bad example

3.2 Connecting the Optical Fiber Cable

Note

The connector to which the cable is to be connected varies depending on the wavelength.

•

Connect the cable to the connector that is indicated by the red indicator at the top of the AQ7270/AQ7275 display.

•

Power monitor measurement uses only POR

CAUTION

When connecting the optical fiber cable connector, insert it vertically and slowly into the optical connector. If you tilt the connector or insert the connector by force, the optical connector may break.

T1.

There are many optical connectors that have inferior parts which do not meet standards. Only use optical connectors that are approved or used by your country or region’s communications industry or other authoritative body (e.g. products from NTT technology transfer or their equivalents).

When Using the Angled PC SC Connector (Suffix Code:-ASC)

•

Use the same type of angled PC SC connector for the connected optical fiber

cable as well. The ferrule end of the angled PC SC connector is polished to an angle. If other types of connectors are used, the end face of the connector may

become damaged.

• You can replace the

AQ7270/AQ7275 connector, but only with an SC type.

Note

If the suffix code is -NON, -USC, or -UFC, attach the optical universal adapter. For details, see section 20.8.

3-6

IM 735020-01E

3.3 Setting the Date and Time

Select the display format of the date and time

Selecting the Detail Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. Soft keys for the settings appear.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Detail soft key. Soft keys for the Detail mode appear.

Press the System Setup soft key. The system setup screen appears.

Measurement Preparation

Note

• The setup menu does not appear even if you press SETUP if you press a soft key other than OTDR.

• You can also set the AQ7270/AQ7275 using Simple (Full Auto) mode.

IM 735020-01E

3-7

Select the display format of the date and time

3.3 Setting the Date and Time

Selecting the Date and Time

Move the cursor using the arrow keys or the rotary knob to highlight Date&Time

Set.

Press ENTER. The screen for setting the date and time appears.

Move the cursor to the item you want to set using the arrow keys or the rotary

knob.

Press ENTER. The screen for setting the value appears.

Turn the rotary knob to set the date or time value.

10.

Press ENTER. The screen for setting the value closes.

11.

Move the cursor using the arrow keys or the rotary knob to SET.

12.

Press ENTER. The date and time are set to the AQ7270/AQ7275.

13.

Date and Time Display Format

14.

15.

16.

17.

18.

19.

20.

Note

The date and time values displayed in Type are examples. They do not indicate the actual date and time.

Move the cursor using the arrow keys or the rotary knob to highlight Type.

Press ENTER. The screen for setting the type appears.

Move the cursor using the arrow keys or the rotary knob to select the type.

Press ENTER. The screen for setting the type closes.

Press ESC. The screen for setting the date closes.

Press ESC. The system setup screen closes.

Press ESC. The setup screen of the Detail mode closes, and the optical pulse

measurement screen appears.

3-8

IM 735020-01E

3.4 Loading the Printer Roll Paper (Option)

Printer cover

Lock lever

Printer paper feed button

Push the lock toward the arrow and slide the cover

Pick up the cover and remove it

Load the paper inside the paper guide

Close the cover so that the paper does not get caught in the tabs and push the cover in

Tabs

Measurement Preparation

Push the lock lever toward the arrow and remove the printer cover.

Load the printer roll paper. See the figure below for the orientation of the roll

paper.

Attach the printer cover.

IM 735020-01E

Press the printer paper feed button to feed the paper to the appropriate position.

3-9

3.5 Connecting the USB Interface

Connecting a USB Printer, USB Memory or USB104 keyboard

Open the top cover.

Connect a USB cable to the Type A connector.

Note

• A single USB printer can be connected. Multiple printers will not be detected.

• You can operate the panel keys by using the USB104 keyboard. See appendix 2 for the correspondence between panel keys and USB keyboard entry keys.

Connecting a USB Cable to Remotely Control the AQ7270/AQ7275 or Accessing the Internal Memory

Note

• If the cover comes off, bend the cover axis with your fingers and attach it.

• The system must be configured for operation. See section 19-1.

Open the top cover.

Connect a USB cable to the Type B connector.

3-10

IM 735020-01E

3.6 Connecting the Ethernet Interface (Option)

You can control the AQ7270/AQ7275 via the Ethernet interface.

Connection Procedure

Connect a UTP (Unshielded Twisted-Pair) cable or an STP (Shielded Twisted-Pair) cable that is connected to a hub, for example, to the AQ7270/AQ7275 connector.

Note

• Be sure to use a straight cable via a hub to connect the AQ7270/AQ7275 to the PC.

• If you are using a UTP cable (straight), use a cable of category 5.

• If the cover comes off, bend the cover axis with your fingers and attach it.

• The system must be configured for operation. See section 19-3.

Measurement Preparation

IM 735020-01E

3-11

3.7 Attaching the Belt

Pass the belt through the buckle again, so it does not come loose.

A hand belt is supplied as a standard accessory. On models with the /SB option, a shoulder belt is also included. This section explains how to attach the belt.

CAUTION

Pass the belt through the buckle and fasten it firmly according to the procedure in this section. If the belt is loose or the belt is passed through only one of the holes in the buckle, the belt may slip off and the instrument may fall.

How to Attach the Hand Belt

The hand belt can be attached to the left or right side of the instrument. Attach the belt to the desired side. There are two hand belt attachment sections. Securely attach the hand belt at the two sections.

Pass the hand belt through the lower hand belt attachment section on the side of

the instrument.

Pass the hand belt through the hand belt cover.

Pass the hand belt through the upper hand belt attachment section (the second

attachment section from the top) on the side of the instrument.

Pass the hand belt through the buckle.

Fasten the buttons of the hand belt cover.

How to Attach the Shoulder Belt

The shoulder belt can be attached to the shoulder belt attachment section on the left and right sides of the AQ7270/AQ7275. As shown in the figure below, securely attach the shoulder belt by passing the belt through the top belt attachment section on each side of the instrument and then pass it through the buckle.

3-12

IM 735020-01E

Chapter 4 Setting the Optical Pulse Measurement Conditions (Simple Full Auto Mode)

4.1 Selecting the Test Wavelength

Procedure

Select the Simple Setup Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Simple (Full auto) soft key. The Simple (Full Auto) setup screen

appears.

Selecting the Test Wavelength

Press ENTER. A screen for selecting the wavelength appears.

Move the cursor to the wavelength you want to select using the arrow keys or the

rotary knob.

Press ENTER. A screen for selecting the wavelength closes.

Press ESC. The Simple (Full Auto) Setup screen closes, and the optical pulse

measurement screen appears.

Setting the Optical Pulse Measurement Conditions (Simple Full Auto Mode (Set Only the Wavelength))

Note

• The selectable test wavelengths vary depending on the model. For details, see section 21.1.

• The optical pulse output port changes depending on the wavelength.

• The setting is stored in the internal memory. The AQ7270/AQ7275 will start up using the stored settings when the power is turned ON the next time.

IM 735020-01E

4-1

4-2

IM 735020-01E

4.1 Selecting the Test Wavelength

Explanation

The following measurement conditions are automatically detected.

• Distance range

• Pulse width

• Event detection

• Measurement result file storage

The list below contains the measurement conditions for the Simple (Full Auto) mode. You can view the following information in the measurement setup information. For details, see section 7.3.

Item Setting

Distance range Auto Pulse width Auto Attenuation Auto Averaging duration Auto Averaging method High reflection Averaging unit Duration Sampling interval Normal

4.2 Selecting the Approximation Method

Procedure

Parameters such as the splice loss and return loss are calculated using linear approximation. There are two linear approximation methods: least square and two point.

Select the Simple Setup Mode

Selecting the Approximation Method

Press the OTDR soft key. The optical pulse measurement display appears.

Setting the Optical Pulse Measurement Conditions (Simple Full Auto Mode (Set Only the Wavelength))

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Simple (Full auto) soft key. The Simple (Full Auto) setup screen

appears.

Press the ApproxMethod (Marker) soft key. The cursor moves, and the

approximation method switches.

Note

• Approximation method (event) is fixed to LSA(least square).

• There are two approximation methods: LSA and TPA (two point). For a detailed explanation, see section 6.2.

IM 735020-01E

4-3

4-4

IM 735020-01E

4.3 Setting Other Items

Procedure

This section describes system settings such as the save destination of the measured result, language setting, and date/time setting in addition to the measurement condition settings.

Select the Simple Setup Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Simple (Full auto) soft key. The Simple (Full Auto) setup screen

appears.

Selecting the Auto Save Destination

Press the Auto Save Drive soft key.

A screen for selecting the save destination appears.

Move the cursor to the save destination you want to select using the arrow keys

or the rotary knob.

Press ENTER. A screen for selecting the save destination closes.

Press ESC. The Simple (Full Auto) Setup screen closes, and the optical pulse

measurement screen appears.

4.3 Setting Other Items

Selecting the Language and Setting the Date and Time

• Selecting the Language

Press the System Setup soft key. The system setup screen appears.

Move the cursor using the arrow keys or the rotary knob to highlight Language.

Press ENTER. A screen for selecting the language appears.

Move the cursor to the language you want to select using the arrow keys or the

rotary knob.

Press ENTER. The language is confirmed.

Press ESC. The system setup screen closes.

10.

Press ESC. The Simple (Full Auto) Setup screen closes, and the optical pulse

11.

measurement screen appears.

• Selecting the Date and Time

Press the System Setup soft key. The system setup screen appears.

Move the cursor using the arrow keys or the rotary knob to highlight Date &

Time Set.

Press ENTER. The screen for setting the date and time appears.

Move the cursor to the item you want to set using the arrow keys or the rotary

knob.

Press ENTER. A screen for selecting the value appears.

Turn the rotary knob to set the date or time value.

10.

Press ENTER. The screen for setting the value closes.

11.

Move the cursor using the arrow keys or the rotary knob to highlight SET.

12.

Press ENTER. The date and time are set to the AQ7270/AQ7275.

13.

Setting the Optical Pulse Measurement Conditions (Simple Full Auto Mode (Set Only the Wavelength))

• Date and Time Display Format

Move the cursor using the arrow keys or the rotary knob to highlight Type.

14.

Press ENTER. The screen for setting the type appears.

15.

Move the cursor using the arrow keys or the rotary knob to select the type.

16.

Press ENTER. The type is confirmed.

17.

Press ESC. The screen for setting the date closes.

18.

Press ESC. The system setup screen closes.

19.

Press ESC. The Simple (Full Auto) Setup screen closes, and the optical pulse

20.

measurement screen appears.

IM 735020-01E

4-5

4.3 Setting Other Items

Explanation

Auto Save

The AQ7270/AQ7275 creates folders indicating the date and time in the selected drive and automatically saves the measurement result files.

File type SOR File name format File name format specified in the File menu.

4-6

IM 735020-01E

Select the wavelength (see page 5-2 for the procedure)

Select the distance range (see page 5-2 for the procedure)

Select the pulse width (see page 5-3 for the procedure)

Select the averaging method of the waveform (see page 5-3 for the procedure)

Select the sampling interval (see page 5-4 for the procedure)

Select the attenuation value (see page 5-4 for the procedure)

Select the averaging unit (see page 5-5 for the procedure)

Select the averaging duration or count (see page 5-6 for the procedure)

Enable/disable the plug check (see page 5-7 for the procedure)

Enable/disable the Fiber-In-Use alarm (see page 5-7 for the procedure)

Chapter 5 Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode)

5.1 Setting the Measurement Conditions

Procedure

Selecting the Measurement Wizard Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Measurement Wizard soft key. A soft key menu for the measurement

setup (wizard) appears.

Setting the Measurement Conditions

Press the Meas Setup soft key. The Measurement (Wizard) screen appears.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

IM 735020-01E

5-1

5-2

IM 735020-01E

5.1 Setting the Measurement Conditions

• Selecting the Wavelength

Move the cursor to Wavelength using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the wavelength appears.

Press ENTER. A screen for selecting the wavelength appears.

Move the cursor to the wavelength you want to select using the arrow keys or the

rotary knob.

Press ENTER. The wavelength is confirmed.

10.

Note

• The selectable test wavelengths vary depending on the model. For details, see section 21.1.

• The optical pulse output port changes depending on the wavelength.

• The setting is stored in the internal memory. The AQ7270/AQ7275 will start up using the stored settings when the power is turned ON the next time.

• Select the Distance Range

11.

12.

13.

14.

15.

Note

For a detailed explanation, see section 6.1.

Move the cursor to Distance Range using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the distance range appears.

Press ENTER. A screen for selecting the distance range appears.

Move the cursor to the distance range you want to select using the arrow keys or

the rotary knob.

Press ENTER. The distance range is confirmed.

• Selecting the Pulse Width

16.

17.

18.

19.

20.

Note

5.1 Setting the Measurement Conditions

Move the cursor to Pulse Width using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the pulse width appears.

Press ENTER. A screen for selecting the pulse width appears.

Move the cursor to the pulse width you want to select using the arrow keys or the

rotary knob.

Press ENTER. The pulse width is confirmed.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

• You cannot select the pulse width if the distance range is set to auto.

• For a detailed explanation, see section 6.1.

• Selecting the Averaging Method

21.

22.

23.

24.

25.

Note

Move the cursor to Avg Method using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the averaging method appears.

Press ENTER. A screen for selecting the averaging method appears.

Move the cursor to the averaging method you want to select using the arrow

keys or the rotary knob.

Press ENTER. The averaging method is confirmed.

For a detailed explanation, see section 6.1.

IM 735020-01E

5-3

5-4

IM 735020-01E

5.1 Setting the Measurement Conditions

• Setting the Attenuation

Move the cursor to Attenuation using the arrow keys or the rotary knob.

26.

Press ENTER. A wizard screen for setting the attenuation appears.

27.

Press ENTER. The screen for setting the attenuation appears.

28.

Move the cursor to the attenuation value you want to select using the arrow keys

29.

or the rotary knob.

Press ENTER. The attenuation is confirmed.

30.

Note

• For a detailed explanation, see section 6.1.

• You cannot select the attenuation if the averaging method is set to high reflection.

• Selecting the Sampling Interval

31.

32.

33.

34.

35.

Note

For a detailed explanation, see section 6.1.

Move the cursor to Sample Interval using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the sampling interval appears.

Press ENTER. A screen for selecting the sampling interval appears.

Move the cursor to the sampling interval you want to select using the arrow keys

or the rotary knob.

Press ENTER. The sampling interval is confirmed.

• Selecting the Averaging Unit

36.

37.

38.

39.

40.

Note

5.1 Setting the Measurement Conditions

Move the cursor to Avg Unit using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the averaging unit appears.

Press ENTER. A screen for selecting the averaging unit appears.

Move the cursor to the averaging unit you want to select using the arrow keys or

the rotary knob.

Press ENTER. The averaging unit is confirmed.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

For a detailed explanation, see section 6.1.

IM 735020-01E

5-5

5-6

IM 735020-01E

If averaging unit is set to Duration

If averaging unit is set to Times

5.1 Setting the Measurement Conditions

• Selecting the Averaging Duration or Count

Move the cursor to Avg Duration/Times using the arrow keys or the rotary knob.

41.

Press ENTER. A wizard screen for selecting the averaging duration or count

42.

appears.

Press ENTER. A screen for selecting the averaging duration or count appears.

43.

Move the cursor to the averaging duration or count you want to select using the

44.

arrow keys or the rotary knob.

Press ENTER. The averaging duration or count is confirmed.

45.

Note

For a detailed explanation, see section 6.1.

• Selecting the Plug Check Mode

46.

47.

48.

49.

50.

Note

5.1 Setting the Measurement Conditions

Move the cursor to Plug Check using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the plug check mode appears.

Press ENTER. A screen for selecting the plug check mode appears.

Move the cursor to the plug check mode you want to select using the arrow keys

or the rotary knob.

Press ENTER. The plug check mode is confirmed.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

For a detailed explanation, see section 6.1.

• Selecting the Fiber-In-Use Alarm

51.

52.

53.

54.

55.

Note

Move the cursor to Fiber-In-Use Alarm using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the fiber-in-use alarm appears.

Press ENTER. A screen for selecting the fiber-in-use alarm appears.

Move the cursor to the fiber-in-use alarm mode you want to select using the

arrow keys or the rotary knob.

Press ENTER. The fiber-in-use alarm mode is confirmed.

For a detailed explanation, see section 6.1.

IM 735020-01E

5-7

5-8

IM 735020-01E

5.2 Setting the Analysis Conditions

Select the group refraction index (see page 5-9 for the procedure)

Select the backscattering light level (see page 5-9 for the procedure)

Select the approximation method of the marker (see page 5-10 for the procedure)

Procedure

Selecting the Measurement Wizard Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Measurement Wizard soft key. A soft key menu for the measurement

setup (wizard) appears.

Setting the Analysis Conditions

Press the Analysis Setup soft key. The Analysis Setup (Wizard) screen appears.

5.2 Setting the Analysis Conditions

• Setting the Group Refraction Index

Move the cursor to IOR using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for setting the group refraction index appears.

Press ENTER. The screen for setting the group refraction index appears.

Turn the rotary knob to set the group refraction index.

Press ENTER. The group refraction index is confirmed.

10.

Note

• Setting the Backscattering Light Level

11.

12.

13.

14.

15.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

For a detailed explanation, see section 6.2.

Move the cursor to Backscatter Level using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for setting the backscattering light level appears.

Press ENTER. The screen for setting the backscattering light level appears.

Turn the rotary knob to set the backscattering light level.

Press ENTER. The backscattering light level is confirmed.

Note

For a detailed explanation, see section 6.2.

IM 735020-01E

5-9

5-10

IM 735020-01E

5.2 Setting the Analysis Conditions

• Selecting the Marker Approximation Method

Move the cursor to Approx.Method (Marker) using the arrow keys or the rotary

16.

knob.

Press ENTER. A wizard screen for selecting the marker approximation method

17.

appears.

Press ENTER. A screen for selecting the marker approximation method appears.

18.

Move the cursor to marker approximation method you want to select using the

19.

arrow keys or the rotary knob.

Press ENTER. The marker approximation method is confirmed.

20.

Note

For a detailed explanation, see section 6.2.

5.3 Setting the Detection Conditions of Reflection

Select the event detection method (see page 5-12 for the procedure)

Select the approximation method of the event detection (see page 5-12 for the procedure)

Select the threshold level of the splice loss (see page 5-13 for the procedure)

Select the threshold level of the return loss (see page 5-13 for the procedure)

Select the threshold level of the end of the fiber (see page 5-14 for the procedure)

Show/hide the fault event display (see page 5-14 for the procedure)

Select the threshold level of the splice loss to be detected as a fault event

(see page 5-15 for the procedure)

Select the threshold level of the return loss to be detected as a fault event

(see page 5-15 for the procedure)

and Loss Waveforms

Procedure

Selecting the Measurement Wizard Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Measurement Wizard soft key. A soft key menu for the measurement

setup (wizard) appears.

Setting the Event Conditions

Press the EvntSearch Setup soft key. The Event Analysis Setup (Wizard) screen

appears.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

IM 735020-01E

5-11

5-12

IM 735020-01E

5.3 Setting the Detection Conditions of Reflection and Loss Waveforms

• Selecting the Event Detection Method

Move the cursor to Event Search using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the event detection method appears.

Press ENTER. A screen for selecting the event detection method appears.

Move the cursor to the event detection method you want to select using the arrow

keys or the rotary knob.

Press ENTER. The event detection method is confirmed.

10.

• Selecting the Approximation Method

Move the cursor to Approx.Method using the arrow keys or the rotary knob.

11.

Press ENTER. A wizard screen for selecting the approximation method appears.

12.

Press ENTER. A screen for selecting the approximation method appears.

13.

Move the cursor to approximation method you want to select using the arrow

14.

keys or the rotary knob.

Press ENTER. The approximation method is confirmed.

15.

Note

For a detailed explanation, see section 6.2.

5.3 Setting the Detection Conditions of Reflection and Loss Waveforms

• Setting the Threshold Level of the Splice Loss Detection Level

Move the cursor to Splice Loss using the arrow keys or the rotary knob.

16.

Press ENTER. A wizard screen for setting the splice loss appears.

17.

Press ENTER. The screen for setting the splice loss appears.

18.

Turn the rotary knob to set the splice loss value.

19.

Press ENTER. The splice loss is confirmed.

20.

• Setting the Threshold Level of the Return Loss Detection Level

21.

22.

23.

24.

25.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

Move the cursor to Return Loss using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for setting the return loss appears.

Press ENTER. The screen for setting the return loss appears.

Turn the rotary knob to set the return loss value.

Press ENTER. The return loss is confirmed.

IM 735020-01E

5-13

5-14

IM 735020-01E

5.3 Setting the Detection Conditions of Reflection and Loss Waveforms

• Setting the Threshold Level of the End of the Fiber (Fresnel Reflection)

Move the cursor to End of Fiber using the arrow keys or the rotary knob.

26.

Press ENTER. A wizard screen for setting the end-of-fiber value appears.

27.

Press ENTER. The screen for setting the end-of-fiber value appears.

28.

Turn the rotary knob to set the end-of-fiber value.

29.

Press ENTER. The end-of-fiber value is confirmed.

30.

• Selecting the Fault Event Display

Move the cursor to Fault Event Display using the arrow keys or the rotary knob.

31.

Press ENTER. A wizard screen for selecting the fault event display appears.

32.

Press ENTER. A screen for selecting the fault event display appears.

33.

Move the cursor to ON or OFF using the arrow keys or the rotary knob.

34.

Press ENTER. The fault event display mode is confirmed.

35.

• Setting the Threshold Level of the Splice Loss Detection Level of the Fault Event

36.

37.

38.

39.

40.

Note

5.3 Setting the Detection Conditions of Reflection and Loss Waveforms

Move the cursor to Splice Loss using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for setting the splice loss appears.

Press ENTER. The screen for setting the splice loss appears.

Turn the rotary knob to set the splice loss value.

Press ENTER. The splice loss is confirmed.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

You cannot select this item if the fault event display is turned OFF.

• Setting the Threshold Level of the Return Loss Detection Level of the Fault Event

41.

42.

43.

44.

45.

Note

Move the cursor to Return Loss using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for setting the return loss appears.

Press ENTER. The screen for setting the return loss appears.

Turn the rotary knob to set the return loss value.

Press ENTER. The return loss is confirmed.

You cannot select this item if the fault event display is turned OFF.

IM 735020-01E

5-15

5-16

IM 735020-01E

5.4 Setting the File

Enable/disable the auto save operation (see page 5-17 for the procedure)

Select the auto save destination drive (see page 5-17 for the procedure)

Select the auto save destination folder (see page 5-18 for the procedure)

Select the file type for auto saving (see page 5-18 for the procedure)

Select the number to be attached to the file name (see page 5-19 for the procedure)

Select the file name type (see page 5-19 for the procedure)

Select the tape ID number (see page 5-20 for the procedure)

Enter the file name (see page 5-20 for the procedure)

Procedure

Selecting the Measurement Wizard Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Measurement Wizard soft key. A soft key menu for the measurement

setup (wizard) appears.

Setting the Storage Conditions of Measurement Results

Press the File Setup soft key. The File Setup (Wizard) screen appears.

5.4 Setting the File

• Selecting the Auto Save Mode

Move the cursor to Auto Save using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the auto save mode appears.

Press ENTER. A screen for selecting the auto save mode appears.

9. Move the cursor to ON or OFF using the

Press ENTER. The auto save mode is confirmed.

10.

arrow keys

or the

rotary knob

• Selecting the Save Destination Media Type

11.

12.

13.

14.

15.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

Move the cursor to Drive using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the save destination drive appears.

Press ENTER. A screen for selecting the save destination drive appears.

Move the cursor to the save destination drive you want to select using the arrow

keys or the rotary knob.

Press ENTER. The save destination drive is confirmed.

Note

You cannot select this item if the auto save mode is turned OFF.

IM 735020-01E

5-17

5-18

IM 735020-01E

5.4 Setting the File

• Selecting the Save Destination Folder

Move the cursor to Dest. Folder using the arrow keys or the rotary knob.

16.

Press ENTER. A wizard screen for selecting the save destination folder appears.

17.

Press ENTER. The File List screen for selecting the save destination folder

18.

appears.

Move the cursor to the save destination folder using the arrow keys or the rotary

19.

knob.

Press ENTER. The contents in the save destination folder are displayed.

20.

Press ESC. The save destination folder is confirmed.

21.

Note

You cannot select this item if the auto save mode is turned OFF.

• Selecting the Storage Data Type

Move the cursor to File Type using the arrow keys or the rotary knob.

22.

Press ENTER. A wizard screen for selecting the file type appears.

23.

Press ENTER. A screen for selecting the file type appears.

24.

Move the cursor to file type you want to select using the arrow keys or the rotary

25.

knob.

Press ENTER. The file type is confirmed.

26.

Note

You cannot select this item if the auto save mode is turned OFF.

• Selecting the File Name Type

27.

28.

29.

30.

31.

Note

5.4 Setting the File

Move the cursor to Name Type using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for selecting the file name type appears.

Press ENTER. A screen for selecting the file name type appears.

Move the cursor to file name type you want to select using the arrow keys or the

rotary knob.

Press ENTER. The file name type is confirmed.

Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode (Displays Setup Explanations))

You cannot select this item if the auto save mode is turned OFF.

• Setting the File ID Number

32.

33.

34.

35.

36.

Note

Move the cursor to ID No. using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for setting the ID number appears.

Press ENTER. The screen for setting the ID number appears.

Turn the rotary knob to set the ID number.

Press ENTER. The ID number is confirmed.

You cannot select this item if the auto save mode is turned OFF.

IM 735020-01E

5-19

5.4 Setting the File

• Setting the ID Number for the Tape Fiber and the Like

Move the cursor to Tape ID using the arrow keys or the rotary knob.

37.

Press ENTER. A wizard screen for selecting the tape ID appears.

38.

Press ENTER. A screen for selecting the tape ID appears.

39.

Move the cursor to tape ID you want to select using the arrow keys or the rotary

40.

knob.

Press ENTER. The tape ID is confirmed.

41.

Note

You cannot select this item if the auto save mode is turned OFF.

• Attaching a Comment to the File Name

42.

43.

44.

45.Enter the comment using the

46.

47.

48.

Note

• You cannot select this item if the auto save mode is turned OFF.

• For the procedures to enter characters, see section 18.6.

Move the cursor to Comment using the arrow keys or the rotary knob.

Press ENTER. A wizard screen for entering the comment appears.

Press ENTER. The character input screen for entering the comment appears.

arrow keys, rotary knob

Press the OK soft key. The character input screen closes.

Press ESC. The wizard screen for entering the comment closes.

Press ESC. The File Setup screen closes, and the optical pulse measurement

screen appears.

and

ENTER

5-20

IM 735020-01E

Select the wavelength (see page 6-2 for the procedure)

Select the distance range (see page 6-2 for the procedure)

Select the pulse width (see page 6-3 for the procedure)

Select the averaging method of the waveform (see page 6-4 for the procedure)

Select the sampling interval (see page 6-4 for the procedure)

Select the attenuation value (see page 6-3 for the procedure)

Select the averaging unit (see page 6-4 for the procedure)

Select the averaging duration or count (see page 6-5 for the procedure)

Enable/disable the plug check (see page 6-9 for the procedure)

Enable/disable the Fiber-In-Use alarm (see page 6-9 for the procedure)

Select the manual or auto event detection (see page 6-5 for the procedure) Enable/disable the auto save operation (see page 6-6 for the procedure)

Enable/disable the averaging measurement continue (see page 6-10 for the procedure)

Initialize the settings (see page 6-10 for the procedure)

Select the scheduling settings (see page 6-10 for the procedure)

Chapter 6 Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

6.1 Setting the Measurement Conditions

Procedure

Selecting the Detail Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Detail soft key. A soft key menu for the Detail mode appears.

Setting the Measurement Conditions

Press the Meas Setup soft key. The Meas Setup screen appears.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

IM 735020-01E

6-1

6.1 Setting the Measurement Conditions

• Selecting the Wavelength

Move the cursor to wavelength using the arrow keys or the rotary knob.

Press ENTER. A screen for selecting the wavelength appears.

Move the cursor to the wavelength you want to select using the arrow keys or the

rotary knob.

Press ENTER. The wavelength is confirmed.

Note

• The selectable test wavelengths vary depending on the model. For details, see section 21.1.

• The optical pulse output port changes depending on the wavelength.

• The setting is stored in the internal memory. The AQ7270/AQ7275 will start up using the stored settings when the power is turned ON the next time.

• Select the Distance Range

Move the cursor to Distance Range using the arrow keys or the rotary knob.

10.

Press ENTER. A screen for selecting the distance range appears.

11.

Move the cursor to the distance range you want to select using the arrow keys or

12.

the rotary knob.

Press ENTER. The distance range is confirmed.

13.

Note

• Set the distance range to a value longer than the length of the optical fiber cable to be measured.

Otherwise, correct measurements cannot be made.

• The longer the distance range, the longer the measurement time will be.

• If you set the distance range, the pulse width and attenuation are automatically set to optimal values.

• Firmware versions 3.01 and later support the 512 km distance range.

6-2

IM 735020-01E

6.1 Setting the Measurement Conditions

• Selecting the Pulse Width

Move the cursor to Pulse Width using the arrow keys or the rotary knob.

14.

Press ENTER. A screen for selecting the pulse width appears.

15.

Move the cursor to the pulse width you want to select using the arrow keys or the

16.

rotary knob.

Press ENTER. The pulse width is confirmed.

17.

• Selecting the Attenuation

Note

• You cannot select the pulse width if the distance range is set to auto.

• If you set the pulse width, the attenuation is automatically set to the optimal value.

Move the cursor to Attenuation using the arrow keys or the rotary knob.

18.

Press ENTER. The screen for setting the attenuation appears.

19.

Move the cursor to the attenuation value you want to select using the arrow keys

20.

or the rotary knob.

Press ENTER. The attenuation is confirmed.

21.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

Note

• You cannot select the attenuation if the distance range or pulse width is set to auto or the averaging method is set to high reflection.

• Measurements cannot be performed at high resolution if the waveform is saturated. If this is the case, increase the value.

• The attenuation setting is valid in realtime measurement or when the averaging method is averaging measurement in high-speed measurement.

IM 735020-01E

6-3

6.1 Setting the Measurement Conditions

• Selecting the Sampling Interval

Move the cursor to Sample Interval using the arrow keys or the rotary knob.

22.

Press ENTER. A screen for selecting the sampling interval appears.

23.

Move the cursor to the sampling interval you want to select using the arrow keys

24.

or the rotary knob.

Press ENTER. The sampling interval is confirmed.

25.

• Selecting the Averaging Method

Move the cursor to Avg Method using the arrow keys or the rotary knob.

26.

Press ENTER. A screen for selecting the averaging method appears.

27.

Move the cursor to the averaging method you want to select using the arrow

28.

keys or the rotary knob.

Press ENTER. The averaging method is confirmed.

29.

Note

We recommend that you make measurements with the averaging method set to high speed only if the optical fiber cable is short and there is no reflection.

• Selecting the Averaging Unit

30.

31.

Move the cursor to Avg Unit using the arrow keys or the rotary knob.

Press ENTER. The cursor moves to Duration or Times by Avg Unit.

6-4

IM 735020-01E

The averaging unit is count

The averaging unit is duration

6.1 Setting the Measurement Conditions

• Selecting the Averaging Count or Duration

Move the cursor to Avg Duration/Times using the arrow keys or the rotary knob.

32.

Press ENTER. A screen for selecting the averaging duration or count appears.

33.

Move the cursor to the averaging duration or count you want to select using the

34.

arrow keys or the rotary knob.

Press ENTER. The averaging duration or count is confirmed.

35.

Note

• Selecting the Event Detection Method

36.

37.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

• The measurement time may be shorter or longer than the specified time due to the effects of other measurement conditions.

• Increasing the count or duration value results in highly accurate measurements, but the measurement takes longer.

Set the value by taking into consideration the dynamic range of the AQ7270/AQ7275 and

the loss in the optical fiber cable.

• The duration or count display depends on the setting specified for the averaging unit.

Move the cursor to Event Search using the arrow keys or the rotary knob.

Press ENTER. The cursor moves to Auto or Manual by Event Search.

IM 735020-01E

6-5

Enable/disable the auto save operation (see page 6-6 for the procedure)

Select the auto save destination drive (see page 6-6 for the procedure)

Select the auto save destination folder (see page 6-7 for the procedure)

Select the file type for auto saving (see page 6-7 for the procedure)

Select the number to be attached to the file name (see page 6-8 for the procedure)

Select the file name type (see page 6-8 for the procedure)

Select the tape ID number (see page 6-8 for the procedure)

Enter the file name (see page 6-9 for the procedure)

6.1 Setting the Measurement Conditions

Note

If you set the auto save mode to ON, be sure to set the save destination folder before starting the measurement, because the measured data is saved automatically after the averaging measurement.

• Enabling or Disabling the Auto Save Function

Move the cursor to Auto Save using the arrow keys or the rotary knob.

38.

Press ENTER. The File Setup screen appears.

39.

40.

Press ENTER. The cursor moves to ON or OFF by Auto Save.

6-6

IM 735020-01E

• Selecting the Save Destination Media Type

41.

42.

43.

44.

Note

• Selecting the Save Destination Folder

45.

46.

47.

48.

49.

6.1 Setting the Measurement Conditions

Move the cursor to Drive using the arrow keys or the rotary knob.

Press ENTER. A screen for selecting the save destination drive appears.

Move the cursor to the save destination drive you want to select using the arrow keys or the rotary knob.

Press ENTER. The save destination drive is confirmed.

You cannot select this item if the auto save mode is turned OFF.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

Move the cursor to Dest. Folder using the arrow keys or the rotary knob.

Press ENTER. The File List screen for selecting the save destination folder appears.

Move the cursor to the save destination folder using the arrow keys or the rotary knob.

Press ENTER. The contents in the save destination folder are displayed.

Press ESC. The File List screen for selecting the save destination folder closes.

Note

You cannot select this item if the auto save mode is turned OFF.

IM 735020-01E

6-7

6.1 Setting the Measurement Conditions

• Selecting the File Type

Move the cursor to File Type using the arrow keys or the rotary knob.

50.

Press ENTER. A screen for selecting the file type appears.

51.

Move the cursor to file type you want to select using the arrow keys or the rotary

52.

knob.

Press ENTER. The file type is confirmed.

53.

Note

You cannot select this item if the auto save mode is turned OFF.

• Selecting the File Name Type

Move the cursor to Name Type using the arrow keys or the rotary knob.

54.

Press ENTER. A screen for selecting the file name type appears.

55.

Move the cursor to file name type you want to select using the arrow keys or the

56.

rotary knob.

Press ENTER. The file name type is confirmed.

57.

Note

You cannot select this item if the auto save mode is turned OFF.

• Setting the File ID Number

58.

59.

60.

61.

Note

You cannot select this item if the auto save mode is turned OFF.

Move the cursor to ID No. using the arrow keys or the rotary knob.

Press ENTER. The screen for setting the ID number appears.

Turn the rotary knob to set the ID number.

Press ENTER. The ID number is confirmed.

6-8

IM 735020-01E

• Setting the ID Number for the Tape Fiber and the Like

62.

63.

64.

65.

Note

• Attaching a Comment to the File Name

66.

67.

68.

69.

70.

6.1 Setting the Measurement Conditions

Move the cursor to Tape ID using the arrow keys or the rotary knob.

Press ENTER. A screen for selecting the tape ID appears.

Move the cursor to tape ID you want to select using the arrow keys or the rotary knob.

Press ENTER. The tape ID is confirmed.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

You cannot select this item if the auto save mode is turned OFF.

Move the cursor to Comment using the arrow keys or the rotary knob.

Press ENTER. The character input screen for entering the comment appears.

Enter the comment using the arrow keys, rotary knob and ENTER.

Press the OK soft key. The characters are confirmed.

Press ESC. The File Setup screen closes, and the optical pulse measurement screen appears.

Note

• You cannot select this item if the auto save mode is turned OFF.

• For the procedures to enter characters, see section 18.6.

• Selecting the Fiber-In-Use Alarm

Move the cursor to Fiber-In-Use Alarm using the arrow keys or the rotary knob.

71.

Press ENTER. The cursor moves to ON or OFF by Fiber-In-Use Alarm.

72.

Note

• The Fiber-In-Use Alarm cannot be selected if the measured wavelength is 850 nm, 1300 nm, or 1650 nm; or on the 735036, 1625 nm.

• You cannot select averaging measurement continue if you turn fiber-in-use alarm ON.

• Selecting the Plug Check Mode

Move the cursor to Plug Check using the arrow keys or the rotary knob.

73.

Press ENTER. The cursor moves to ON or OFF by Plug Check.

74.

Note

• If the averaging measurement continue was turned ON, it is turned OFF.

• You can select whether to continue or discontinue measurement when an error is displayed for the plug check.

IM 735020-01E

6-9

Measurement duration setting (units of days)

Measurement interval setting (units of minutes) Set longer than: averaging duration × wavelenth + save time

Selects whether or not to specify a measurement start time. When OFF, measurement starts 5 seconds after pressing SET.

Measurement start time settings When Start Time Set is ON, measurement starts at the date and time specified here.

Finalize settings An alert message appears. Press OK to activate the Scheduling function.

Shows maximum allowable setting (days) Measurable duration per specified measurement interval (continuous saving to USB memory)

6.1 Setting the Measurement Conditions

• Selecting the Averaging Measurement Continue

Move the cursor to Additional Avg using the arrow keys or the rotary knob.

75.

Press ENTER. The cursor moves to ON or OFF by Additional Avg.

76.

Note

You cannot select averaging measurement continue if the distance range is set to auto, if the plug check is turned ON, or if the fiber-in-use alarm is turned ON.

• Initializing the Measurement Conditions

Move the cursor to Default using the arrow keys or the rotary knob.

77.

Press ENTER. The measurement conditions are initialized to factory default

78.

settings.

• Schedule Setting

Move the cursor to Schedule Set using the arrow keys or the rotary knob.

79.

Press ENTER. The Scheduling settings screen below is displayed.

80.

6-10

Note

When a scheduled measurement is being performed, you cannot change the schedule.

IM 735020-01E

Explanation

Optical pulse output indicator

Selecting the Wavelength

The optical pulse output port changes depending on the specified wavelength. Check the optical pulse output port indicator on the AQ7270/AQ7275, and connect the optical fiber cable to the output port.

Selecting the Distance Range

Set the distance range to match the cable length. The selectable distance range varies depending on the wavelength.

Cable Length Distance Range

Unknown Auto 0 to 400 m 500 m 400 m to 800 m 1 km 800 m to 1.6 km 2 km

1.6 km to 4 km 5 km 4 km to 8 km 10 km 8 km to 16 km 20 km 16 km to 40 km 50 km 40 km to 80 km 100 km 80 km to 160 km 200 km 160 km to 240 km 300 km 240 km to 400 km 400 km

* Firmware versions 3.01 and later support this distance range.

6.1 Setting the Measurement Conditions

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

Selecting the Pulse Width

The pulse width has the following characteristics.

• A short pulse width allows measurements in high resolution but cannot measure long distances.

• A long pulse width allows long-distance measurements but ca resolution.

The selectable pulse width varies depending on the wavelength and distance range. See the table below.

Distance Range Selectable Pulse Widths

20 ms

If the wavelength is 850 nm, you cannot use 3ns, 2 ms, 5 ms, 10 ms, and 20 ms(3 ns is available on the 735041) If the wavelength is 1300 nm, you cannot use 3ns, 10 ms and 20 ms(3 ns is available on the

735041).

nnot measure in high

IM 735020-01E

6-11

6.1 Setting the Measurement Conditions

Selecting the Attenuation

If a large reflection occurs at a connection point of the optical connector or at the point where the optical fiber cable is broken, the waveform may saturate. Attenuation is used to prevent saturation. The selectable attenuation values vary depending on the pulse width. See the table below.

Pulse Width Selectable Attenuation Values

3 ns to 50 ns 0 dB, 2.50 dB, 5.00 dB, 7.50 dB, 10.00 dB, 12.50 dB, 15.00 dB 100 ns to 1 ms 0 dB, 2.50 dB, 5.00 dB, 7.50 dB, 10.00 dB, 12.50 dB, 15.00 dB, 17.50 dB,

2 ms to 5 ms

10 ms to 20 ms 0 dB, 2.50 dB, 5.00 dB, 7.50 dB, 10.00 dB, 12.50 dB, 15.00 dB, 17.50 dB,

* AQ7275 only

If the wavelength is 850 nm or 1300 nm (excluding the 735041)

Pulse Width Selectable

10 ns to 50 ns 0 dB, 2.5 dB, 5.0 dB, 7.5 dB, 10.0 dB, 12.5 dB 100 ns or longer 0 dB, 2.5 dB, 5.0 dB, 7.5 dB, 10.0 dB, 12.5 dB, 15.0 dB, 17.5 dB

If the wavelength is 850 nm or 1300 nm (for the 735041)

Pulse Width Selectable

3 ns to 50 ns 0 dB, 2.5 dB, 5.0 dB, 7.5 dB, 10.0 dB, 12.5 dB, 15.0 dB 100 ns or longer 0 dB, 2.5 dB, 5.0 dB, 7.5 dB, 10.0 dB, 12.5 dB, 15.0 dB, 17.5 dB, 20.0 dB

20.00 dB 0 dB, 2.50 dB, 5.00 dB, 7.50 dB, 10.00 dB, 12.50 dB, 15.00 dB, 17.50 dB,

20.00 dB, 22.50 dB, 25.00 dB

20.00 dB, 22.50 dB, 25.00 dB, 27.50 dB, 30.00dB*

Attenuation Values

Selecting the Sampling Interval

The maximum number of sampling data points is 50000. The number of sampling data points is 128000 only when the distance range is set to 512km and the sampling interval is set to 4 km. The shortest sampling interval is determined by the distance range.

Normal:

Measures at the optimal sampling interval.

High resolution: Measures at the shortest sampling interval.

hanges can be measured in more detail by setting the sampling interval short. However,

C the data size of the measured results become large. For the sampling intervals that are selectable depending on the distance range, see below.

Distance Range Selectable Sampling Interval

500 m 5 cm, 10 cm, 20 cm, 50 cm, 1 m 1 km 5 cm, 10 cm, 20 cm, 50 cm, 1 m, 2 m 2 km 5 cm, 10 cm, 20 cm, 50 cm, 1 m, 2 m, 4 m 5 km 10 cm, 20 cm, 50 cm, 1 m, 2 m, 4 m, 8 m 10 km 20 cm, 50 cm, 1 m, 2 m, 4 m, 8 m 20 km 50 cm, 1 m, 2 m, 4 m, 8 m, 16 m 50 km 1 m, 2 m, 4 m, 8 m, 16 m 100 km 2 m, 4 m, 8 m, 16 m 200 km 4 m, 8 m, 16 m, 32 m 300 km 8 m, 16 m, 32 m 400 km 8 m, 16 m, 32 m

* Firmware versions 3.01 and later support this distance range.

Note

When performing high resolution measurement in realtime, you can set the sampling interval to 5 cm to the upper interval limit in all distance ranges. For details, see section 7.4.

6-12

IM 735020-01E

The waveform may saturate if the reflection is large.

6.1 Setting the Measurement Conditions

Selecting the Averaging Method

High Speed

The high speed mode is used to measure all sections using the specified attenuation. If the attenuation is not appropriate and a large reflection occurs, the corresponding section of waveform may saturate.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

High Reflection

The high reflection mode allows accurate measurements even if there are large reflections (excluding extremely large reflections such as those caused by an open end). In high reflection mode, the optimal attenuation is set according to the backscattering light level for each section to make the measurements. Consequently, the measurement takes longer than the high speed mode. The division of sections and optimal attenuation values are automatically set.

Selecting the Averaging Unit

Duration: Measures for the specified duration. If you set a short duration, the

measurement may not complete within the specified duration depending on the measurement conditions.

imes: Measures for the specified number of times.

Selecting the Averaging Count or Duration

The selectable values are as follows: Duration: 5 sec, 10 sec, 20 sec, 30 sec, 1 min, 3 min, 5 min, 10 min, 20 min, and 30

min

The units sec and min represent seconds and minutes, respectively.

2^10 (1024 times), 2^11 (2048 times), 2^12 (4096 times), 2^13 (8192 times),

Times: 2^14 (16384 times), 2^15 (32768 times), 2^16 (65536 times), 2^17 (131072

times), 2^18 (262144 times), 2^19 (524288 times), 2^20 (1048576 times) 2~10 represents 2 to the power of 10 (1024 times).

Note

Because the maximum averaging count is 2^20, measurement will stop before the specified averaging duration elapses if you set the averaging duration greater than this maximum.

Selecting the Event Detection

The event detection function automatically detects events from the acquired data after the averaging measurement. Auto: Automatically detects events after the averaging measurement, creates a list,

and shows the event analysis menu. Manual: Displays the waveform after the averaging measurement but does not detect

events.

IM 735020-01E

6-13

6.1 Setting the Measurement Conditions

Automatic Storage of Measured Results

The measured data acquired after the averaging measurement can be saved automatically to a specified destination folder. OFF: Does not save the measured data after the averaging measurement. ON:

Automatically saves the measured data after the averaging measurement.

Selecting the Plug Check Mode

The plug check function verifies the connection between the AQ7270/AQ7275 and the optical fiber cable. If this function is turned ON and the optical fiber cable is not connected to the AQ7270/AQ7275 or the connection is not appropriate, the AQ7270/ AQ7275 does not transmit light from the optical pulse output port. OFF:

Does not perform a plug check.

ON: Perform a plug check.

Selecting the Fiber-In-Use Alarm

The wavelength of the optical pulse used by the AQ7270/AQ7275 is the same as that used in optical communications. If optical communication is ongoing in the optical fiber cable, applying the light from the AQ7270/AQ7275 will affect the communication. This communication light is called in-service light. The fiber-in-use alarm checks whether communication light is passing through the optical fiber cable that you are trying to measure. If an in-service light is detected, an alert is displayed asking whether you want to continue with the measurement. If the input level of the in-service light is -20 to 0 dBm, an alert message is displayed repeatedly to prevent damage to the AQ7270/AQ7275. If this message appears, stop the measurement. For details on starting/stopping the measurement, see chapter 7.For details on the message, see section 20.2.

Selecting the Averaging Measurement Continue

The averaging measurement continue function continues the averaging measurement on an already acquired waveform if the waveforms are acquired repetitively. OFF: Does not perform averaging measurement continue. ON: Performs averaging measurement continue.

veraging measurement is performed up to 220 times.

The averaging measurement continue is invalid if any of the following settings is ON.

• The distance range is set to auto.

• Plug check.

•

Fiber-in-use alarm

Scheduleing Settings ( firmware version 2.07 or later)

When a previously specified time is reaced, this function performs measurement at a specified interval and saves the measured results to USB memory. This function can be used when in Detail or Multi WL setup mode.

6-14

IM 735020-01E

Forces Scheduling function to stop

Name of currently saved file

Measurement end time

Measurement interval

Measurement period

The time until the next measurement starts (firmware versions

3.01 and later)

USB memory root directory

09_12 (yy_mm)

12_15 (mm_dd)

Measured data file

＊：

1 wavelength: File name with multiples of 100 (00, 100, 200, 300...) 2 wavelengths: File name with multiples of 50 (00, 50, 100, 150...) 3 wavelengths: File name with multiples of 30 (00, 30, 60, 90, 120...)

6.1 Setting the Measurement Conditions

Screen during Execution of Scheduling Function

When the Scheduling function measurement start time is reached, the measurement screen appears as follows.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

File Name

Data saved by the Scheduling function is saved in the following structure.

The example above shows the save directory for files saved on December 15th, 2009. The file name is:

wavelength_IDnumber.SOR

The file name for 1310 nm, ID number 001 would be: 1310_001.SOR

IM 735020-01E

6-15

6.2 Setting the Analysis Conditions

Set the group refraction index (see page 6-16 for the procedure)

Set the backscattering light level (see page 6-16 for the procedure)

Select the approximation method of the marker (see page 6-16 for the procedure)

Select the approximation method of the event detection (see page 6-16 for the procedure)

Set the threshold level of the splice loss (see page 6-16 for the procedure)

Set the threshold level of the return loss (see page 6-17 for the procedure)

Set the threshold level of the splice loss to be detected as a fault event (see page 6-17 for the procedure)

Set the threshold level of the return loss to be detected as a fault event (see page 6-17 for the procedure)

Set the threshold level of the end of the fiber (see page 6-17 for the procedure)

Show/hide the fault event display (see page 6-17 for the procedure)

Initialize the settings (see page 6-17 for the procedure)

Show/hide the judgement result display (see page 6-17 for the procedure)

Procedure

Selecting the Detail Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Detail soft key. A soft key menu for the Detail mode appears.

Setting the Analysis Conditions

Press the Analysis Setup soft key. The Analysis Setup screen appears.

6-16

IM 735020-01E

• Setting the Group Refraction Index

Note

• Setting the Backscattering Light Level

10.

11.

12.

13.

6.2 Setting the Analysis Conditions

Move the cursor to IOR using the arrow keys or the rotary knob.

Press ENTER. The screen for setting the group refraction index appears.

Set the group refraction index value using the arrow keys or the rotary knob.

Press ENTER. The group refraction index is confirmed.

• The AQ7270/AQ7275 measures the distance using the group refraction index. If you do not set the group refraction index correctly, an error will occur in the measured distance.

• The group refraction index varies depending on the wavelength. The default value indicates the group refraction index corresponding to each wavelength.

• The selectable range is between 1.30000 and 1.79999.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

Move the cursor to Backscatter Level using the arrow keys or the rotary knob.

Press ENTER. The screen for setting the backscattering light level appears.

Set the backscattering light level using the arrow keys or the rotary knob.

Press ENTER. The backscattering light level is confirmed.

Note

• If you do not set the backscattering light level correctly, an error will occur in the measured return loss and total return loss.

• The default value varies depending on the wavelength. The default value indicates the backscattering level corresponding to each wavelength.

• Theselectablerangeis–10.00to–64.99.

• Selecting the Marker Approximation Method

Move the cursor to Approx.Method (Marker) using the arrow keys or the rotary

14.

knob.

Press ENTER. The cursor moves to LSA or TPA by Approx.Method (Marker).

15.

• Selecting the Event Approximation Method

Move the cursor to Approx.Method (Event) using the arrow keys or the rotary

16.

knob.

Press ENTER. The cursor moves to LSA or TPA by Approx.Method (Event).

17.

• Setting the Threshold Level of the Splice Loss Detection Level

Move the cursor to Splice Loss using the arrow keys or the rotary knob.

18.

Press ENTER. The screen for setting the splice loss appears.

19.

Set the splice loss using the arrow keys or the rotary knob.

20.

Press ENTER. The splice loss is confirmed.

21.

IM 735020-01E

6-17

6.2 Setting the Analysis Conditions

• Setting the Threshold Level of the Return Loss Detection Level

Move the cursor to Return Loss using the arrow keys or the rotary knob.

22.

Press ENTER. The screen for setting the return loss appears.

23.

Set the return loss using the arrow keys or the rotary knob.

24.

Press ENTER. The return loss is confirmed.

25.

• Setting the Threshold Level of the End of the Fiber (Fresnel Reflection)

Move the cursor to End of Fiber using the arrow keys or the rotary knob.

26.

Press ENTER. The screen for setting the end-of-fiber value appears.

27.

Set the end-of-fiber value using the arrow keys or the rotary knob.

28.

Press ENTER. The end-of-fiber value is confirmed.

29.

• Selecting the Fault Event Display

Move the cursor to Fault Event Display using the arrow keys or the rotary knob.

30.

Press ENTER. The cursor moves to ON or OFF by Fault Event Display.

31.

• Setting the Threshold Level of the Splice Loss Detection Level of the Fault Event

32.

33.

34.

35.

• Setting the Threshold Level of the Return Loss Detection Level of the Fault Event

36.

37.

38.

39.

• Selecting the Judgement Result Display

40.

41.

Move the cursor to Splice Loss using the arrow keys or the rotary knob.

Press ENTER. The screen for setting the splice loss appears.

Set the splice loss using the arrow keys or the rotary knob.

Press ENTER. The splice loss is confirmed.

Move the cursor to Return Loss using the arrow keys or the rotary knob.

Press ENTER. The screen for setting the return loss appears.

Set the return loss using the arrow keys or the rotary knob.

Press ENTER. The return loss is confirmed.

Move the cursor to Judgement using the arrow keys or the rotary knob.

Press ENTER. The cursor moves to Display or Hide.

6-18

• Initializing the Analysis Conditions

Move the cursor to Default using the arrow keys or the rotary knob.

42.

Press ENTER. The analysis conditions are initialized to factory default settings.

43.

IM 735020-01E

Explanation

Setting the Group Refraction Index

Setting the Backscattering Light Level

6.2 Setting the Analysis Conditions

The following group refraction indexes are assigned according to the wavelength on the AQ7270/AQ7275.

850 nm: 1.46000 1300 nm: 1.46000 1310 nm: 1490 nm: 1.46000 1550 nm: 1.46000 1625 nm: 1.46000 1650 nm: 1.46000

The selectable range is 1.30000 to 1.79999.

A phenomenon called Rayleigh scattering occurs in the light that traverse through an optical fiber cable. Within the Rayleigh scattering, the portion of the light that scatters in the direction opposite to the propagation direction of light is called backscattering. The backscattering light level setting is used to calculate the return loss and total return loss. The following backscattering light levels are assigned according to the wavelength on the AQ7270/AQ7275.

850 1300nm: –41dB 1310nm: –50dB 1490nm: –52dB 1550nm: –52dB 1625nm: –53dB 1650nm: –53dB

1.46000

nm:

–32dB

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

The selectable range is -10.00 to -64.99.

IM 735020-01E

6-19

1 2

Approximation line calculation range

1 2

Approximation line calculation point

6.2 Setting the Analysis Conditions

Approximation Method

A line is assumed when calculating the splice loss. This line is the approximation line. The following two types of linear approximations are available.

• Least squares approximation (LSA)

• T

wo point approximation (TP

LSA

The loss between two points (between 1 and 2 in the figure below) is calculated using the least squares method. This method has the following characteristics. Advantage:

Variation in the calculated value decreases, and the reproducibility of the

Disadvantage:

LSA allows calculation with less error than TPA if there are no return or splice loss events.

The calculation error is small, because all the data between the two

points are used.

calculated value improves. If a large reflection or splice loss is present in the section in which the loss is calculated, the error becomes large because this value is also included.

TPA

Calculates the loss using the difference in the levels of the specified two points. The calculated value may vary greatly, and the reproducibility may be poor. TPA allows calculation with less error than LSA if there are return or splice loss events.

6-20

IM 735020-01E

Event Detection Conditions

Splice Loss

If a splice loss that is greater than or equal to the specified threshold level occurs, it is detected as an event. The selectable range is 0.01 dB to 9.99 dB.

Return Loss

If a return loss that is less than or equal to the specified threshold level occurs, it is detected as an event. Because the return loss is smaller as the reflection increases, the event (reflection) is detected when the return loss is less than or equal to the threshold level. The selectable range is 20 dB to 70 dB.

6.2 Setting the Analysis Conditions

End of Fiber (Fresnel Reflection)

If a reflection that is greater than or equal to the specified threshold level occurs, it is detected as an end of fiber. The selectable range is 3 dB to 65 dB.

Displaying Fault Events

Display

An event that is greater than or equal to the specified threshold level (less than or equal to the specified threshold level for reflections) is displayed as a fault event.

OFF: Even if there is an event greater than the threshold level, the * mark is not

displayed.

ON: Events greater than the threshold level are indicated by the * mark.

Splice Loss, Return Loss

Set the threshold levels used to display splice loss and return loss as fault events.

Splice loss: The selectable range is 0.01 dB to 9.99 dB. Return loss: The selectable range is 20 dB to 70 dB.

Because the end of fiber is handled as a splice loss or reflection, there is no fault event solely for the end of fiber.

Judgement

If the Fault Event Display is turned ON, NG or OK is displayed along with the number of fault events.

Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

IM 735020-01E

6-21

6.3 Setting the Multi Wavelength Measurement

Select the wavelength (see page 6-22 for the procedure)

For the procedure, see section 6.1.

Conditions

Procedure

Selecting the Multi Wavelength Measurement Mode

Press the OTDR soft key. The optical pulse measurement display appears.

Press SETUP. A soft key menu for the settings appears.

Press the Mode soft key. A soft key menu for selecting the setup mode appears.

Press the Multi WL soft key. A soft key menu for the multi wavelength

measurement appears.

Setting the Measurement Conditions

Press the Meas Setup soft key. The Meas Setup (Multi Wavelength) screen

appears.

6-22

IM 735020-01E

Yokogawa AQ7270 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Checking the Contents of the Package

Safety Precautions

Waste Electrical and Electronic Equipment

Symbols and Notation Used in This Manual

Contents

Chapter 1 Names and Functions of Parts

1.1 Front Panel

1.2 Rear Panel

1.3 Side Panel

1.4 Display

2.1 Measurement Configuration

2.2 Measurement Procedure

2.4 Distance Measurement

Chapter 3 Measurement Preparation

3.1 Connecting the Power Supply

3.2 Connecting the Optical Fiber Cable

3.3 Setting the Date and Time

3.4 Loading the Printer Roll Paper (Option)

3.5 Connecting the USB Interface

3.6 Connecting the Ethernet Interface (Option)

3.7 Attaching the Belt

Chapter 4 Setting the Optical Pulse Measurement Conditions (Simple Full Auto Mode)

4.1 Selecting the Test Wavelength

4.2 Selecting the Approximation Method

4.3 Setting Other Items

Chapter 5 Setting the Optical Pulse Measurement Conditions (Measurement Wizard Mode)

5.1 Setting the Measurement Conditions

5.2 Setting the Analysis Conditions

5.4 Setting the File

Chapter 6 Setting the Optical Pulse Measurement Conditions (Detail Mode (Manually Setting All Items))

6.1 Setting the Measurement Conditions

6.2 Setting the Analysis Conditions