Keysight Technologies 86120D, 86122C User Manual

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Keysight 86120D and 86122C Multi-Wavelength Meters

User’s Guide

Notices

CAUTION

WARNING

No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Keysight Technologies as governed by United States and international copyright laws.

Manual Part Number

86122-90B02

Edition

ition 4.0, October 2017

Keysight Technologies Deutschland GmbH Herrenberger Strasse 130, 71034 Böblingen, Germany

Technology Licenses

The hard ware and/or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license.

U.S. Government Rights

The Software is “commercial computer software,” as defined by Federal Acquisition Regulation (“FAR”) 2.101. Pursuant to FAR

12.212 and 27.405-3 and Department of Defense FAR Supplement

(“DFARS”) 227.7202, the U.S. government acquires commercial computer software under the same terms by which the software is customarily provided to the public. Accordingly, Keysight provides the Software to U.S. government customers under its standard commercial license, which is embodied in its End User License Agreement (EULA), a copy of which can be found at http://www.keysight.com/find/sweula. The license set forth in the EULA represents the exclusive authority by which the U.S. government may use, modify, distribute, or

disclose the Software. The EULA and the license set forth therein, does not require or permit, among other things, that Keysight: (1) Furnish technical information related to commercial computer software or commercial computer software documentation that is not customarily provided to the public; or (2) Relinquish to, or otherwise provide, the government rights in excess of these rights customarily provided to the public to use, mod ify, reproduce, release, perform, display, or d isclose commercial computer software or commercial computer software documentation. No additional government requirements beyond those set forth in the EULA shall apply, except to the extent that those terms, rights, or licenses are explicitly required from all providers of commercial computer software pursuant to the FAR and the DFARS and are set forth specifically in writing elsewhere in the EULA. Keysight shall be under no obligation to update, revise or otherwise modify the Software. With respect to any technical data as defined by FAR 2.101, pursuant to FAR

12.211 and 27.404.2 and DFARS 227.7102, the U.S. government acquires no greater than Limited Rights as defined in FAR

27.401 or DFAR 227.7103-5 (c), as applicable in any technical data.

Warranty

THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED "AS IS," AND IS SUBJECT TO BEING CHANGED, WITHOUT NOTICE, IN FUTURE EDITIONS. FURTHER, TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, KEYSIGHT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEYSIGHT SHALL

NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING, USE, OR PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN. SHOULD KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY TERMS IN THE SEPARATE AGREEMENT WILL CONTROL.

Safety Notices

A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met.

A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met.

2 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

1 Getting Started

General Safety Considerations 8

Warnings and Notices 8 Instrument Markings 9

Setting Up the Multi-Wavelength Meter 14

Step 1. Inspect the Shipment 14 Step 2. Consider Environmental Specifications 17 Step 3. Configure for Bench Top or Rack Mount Use 19 Step 4. Connect a Keyboard and Mouse (Optional) 21 Step 5. Connect the Line Cord 22 Step 6. Turn On the Line Power 23 Step 7. Calibrate the Touch Screen (Optional) 25 Step 8. Set the Time and Date 27 Step 9. Set the System Standby Mode 28 Step 10. Add a Printer 30 Step 11. Change Region and Language Settings 33 Step 12. Avoid Costly Repairs 38 Step 13. For More Information 38

Making Measurements 39

Step 1. Consider Measurement Limitations 39 Step 2. Select Basic Measurement Setup Parameters 42 Step 3. Define Laser-Line Peaks 45 Step 4. Make Measurements 48 Step 5. Adjust the Graph to Your Preference 51 Step 6. Save Measurement Results 56

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 3

Contents

Returning the Instrument for Service 59

Preparing the instrument for shipping 59

Keysight Technologies Service Offices 62

2 Using the Multi-Wavelength Meter

Introduction 64

Differences Between the 86120D, 86122C and Previous Models 65

Differences in General Operation 65 Differences in Remote Commands 66

Front and Rear Panel Features 68

Main Screen Layout 70

Graphs and Tables 72

Front Panel Buttons 73

Menus 76

The File menu 76 The View menu 77 The Setup menu 78 The Measure menu 78 The Utilities menu 79 The Apps menu 79 The Help menu 79

Dialog Box Operation 80

Hard Drive Recovery 81

4 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

3 Cleaning Information

Cleaning Instructions 84

Safety Precautions 84 Why is it important to clean optical devices? 84 What do I need for proper cleaning? 85 Preserving Connectors 90 How to clean connector interfaces 92 How to clean bare fiber adapters 93 How to clean instruments with a fixed connector interface 94 Additional Cleaning Information 95 Other Cleaning Hints 95

4 Specifications and Regulatory Information

Definitions of Terms 98

Specifications 100

Compliance with German Noise Requirements 103

Compliance with Canadian EMC Requirements 103

Contents

Declaration of Conformity 103

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 5

Keysight 86120D and 86122C Multi-Wavelength Meters

User’s Guide

1 Getting Started

General Safety Considerations / 8 Setting Up the Multi-Wavelength Meter / 14 Making Measurements / 39 Returning the Instrument for Service / 59 Keysight Technologies Service Offices / 62

1 Getting Started

WARNING

General Safety Considerations

Warnings and Notices

This product has been designed and tested in accordance with the standards listed in the Manufacturer’s Declaration of Conformity, and has been supplied in a safe condition. The documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the product in a safe condition.

To avoid the possibility of injury or death, you must observe the following precautions before switching on the instrument. Insert the power cable plug only into a socket outlet provided with a protective earth contact. Do not negate this protective action by the using an extension cord without a protective conductor.

Never look directly into the end of a fiber or a connector, unless you are absolutely certain that there is no signal in the fiber.

8 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Instrument Markings

Getting Started 1

The instruction manual symbol. The product is marked with this warning symbol when it is necessary for the user to refer to the instructions in the manual.

The laser radiation symbol. This warning symbol is marked on products which have a laser output.

The AC symbol is used to indicate the required nature of the line module input power.

The ON symbols are used to mark the positions of the instrument power line switch.

The OFF symbols are used to mark the positions of the instrument power line switch.

The CE Marking to state compliance within the European Union. This product is in conformity with the relevant European Directives. This text denotes the instrument is an Industrial Scientific and Medical Group 1 Class A product.

The Safety Mark of the Canadian Standards Association CSA.

The C-Tick Conformity Mark of the Australian ACA for EMC

compliance.

This text denotes the instrument is an Industrial Scientific and Medical Group 1 Class A product.

This marking is for China only and states compliance with the Chinese Toxic or Hazardous Substances and Elements requirements.

General Recycling Mark.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 9

1 Getting Started

WARNING

This product complies with the WEEE Directive (2002/96/EC) marketing requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste.

Product category: With reference to the equipment types in the WEEE Directive Annexure I, this product is classed as a “Monitoring and Control instrumentation” product.

Do not dispose in domestic household waste.

To return unwanted products, contact your local Keysight office, or see

http://about.keysight.com/en/companyinfo/environment/takeback.shtml

for more information.

If this product is not used as specified, the protection provided by the equipment could be impaired. This product must be used in a normal condition (in which all means for protection are intact) only.

No operator serviceable parts inside. Refer servicing to qualified service personnel. To prevent electrical shock do not remove covers.

This is a Safety Class 1 Product (provided with protective earth). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor inside or outside of the instrument is likely to make the instrument dangerous. Intentional interruption is prohibited.

To prevent electrical shock, disconnect the instrument from mains before cleaning. Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally.

10 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

CAUTION

This product complies with Overvoltage Category II and Pollution Degree

2. It has been designed for indoor use only.

Always use the three-prong AC power cord supplied with this instrument. Failure to ensure adequate earth grounding by not using this cord may cause instrument damage.

This instrument has auto-ranging line voltage input. Be sure the supply voltage is within the specified range.

Use of controls or adjustment or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 11

This Multi-Wavelength Meter uses a specially designed Windows application program (Windows ® is a U.S. registered trademark of Microsoft Corp.) All Multi-Wavelength Meter functionality is directly available from within the Multi- Wavelength Meter application. Windows configuration changes made outside of the Multi-Wavelength Meter application may not work correctly and could cause the instrument to become inoperable. Do not try to access or make changes to the Windows Operating system. Repairs caused by the improper use of the Multi-Wavelength Meter will not be covered under warranty.

1 Getting Started

CAUTION

VENTILATION REQUIREMENTS: When installing the product in a cabinet, the convection into and out of the product must not be restricted. The ambient temperature (outside the cabinet) must be less than the maximum operating temperature of the product by 4° C for every 100 watts dissipated in the cabinet. If the total power dissipated in the cabinet is greater than 800 watts, then forced convection must be used.

Install the instrument so that the detachable power cord is readily identifiable and is easily reached by the operator. The detachable power cord is the instrument disconnecting device. It disconnects the mains circuit from the mains supply before other parts of the instrument. The front panel switch is only a standby switch and is not a LINE switch. Alternatively, an externally installed switch or circuit breaker (which is readily identifiable and is easily reached by the operator) may be used as a disconnecting device.

There is no output laser aperture

The Keysight 86120D and 86122C do not have an output laser aperture. However, light less than 1 nW escapes out of the front- panel OPTICAL INPUT connector. Operator maintenance or precautions are not necessary to maintain safety. No controls, adjustments, or performance of procedures result in hazardous radiation exposure.

Laser Safety Information

The laser sources contained in the product specified by this user guide are classified according to IEC 60825- 1 (2014).

The laser sources comply with 21 CFR 1040.10 except for deviations pursuant to Laser Notice No. 50 dated 2007- June- 24.

12 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

Table 1 Safety Information for Wavelength Meter

86120D, 86122C

Laser type HeNe Laser

Wavelength (±0.1 nm) 632.8 nm

Max. CW output power

Beam waist diameter 9 μm

Numerical aperture 0.1

Laser Class according to IEC 60825-1 (2014) Class 1

Max. permissible CW output power 0.39 mW

Max. CW output power is defined as the highest possible optical power that the laser source can

produce at its output connector.

< 1 nW

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 13

1 Getting Started

NOTE

Setting Up the Multi-Wavelength Meter

This section describes the steps required to properly set up your instrument.

Step 1. Inspect the Shipment

1 Use proper lifting techniques to remove the items from the shipping

container.

Keep the shipping container and cushioning material until you have inspected the contents of the shipment for completeness and have inspected the instrument.

2 Inspect the shipment

Figure 1

• Inspect the shipping container for damage.

• Inspect the instrument.

14 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

• Verify that you received the options and accessories you ordered. If anything is missing or defective, contact your nearest Keysight

Technologies Service Office. Refer to Keysight Technologies Service

Offices on page 62. If the shipment was damaged, contact the carrier,

then contact the nearest Keysight Sales Office. Keep the shipping materials for the carrier’s inspection. The Keysight Sales Office will arrange for repair or replacement at Keysight’s option without waiting for claim settlement.

Options and Accessories

The following table lists the accessories that may be on the shipping list. The information on your actual shipping list is more accurate and should supersede the information in this table.

Table 2 Accessories Included

Accessories Part Number

Stylus 1150-7997

Getting Started 86122-90A02

Power Cord depends on country

Getting Started 1

86120D-UK6 or 86122C-UK6

Table 3 Instrument Options

Option Description

86120D Multi-Wavelength Meter, 700 nm to 1650 nm, +/-1.5 ppm

Optical Connectors

86120D-021 Straight Contact Interface-PC

86120D-022 Angled Contact Interface-APC

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 15

Commercial Calibration Certificate with Test Data

1 Getting Started

Option Description

Accessories

86122A-1CM Rack Mount Kit without Handles

86122A-1CN Rack Handle Kit

86122A-1CP Mount Kit plus Handles

The following table lists the available product options. Make sure that you received all of the options that you ordered.

Table 4 Instrument Options

Option Description

86122C Multi-Wavelength Meter

86122C-100 Wavelengths 1270 nm to 1650 nm, +/-0.2 ppm

86122C-110 Wavelengths 1270 nm to 1650 nm, Fast Update, +/-0.2 ppm

Optical Connectors

86122C-021 Straight (non-angled) Contact Interface-PC (default)

86122C-022 Angled Contact Interface-APC

Accessories

86122A-1CM Rack Mount Kit without Handles

86122A-1CN Rack Handle Kit

86122A-1CP Mount Kit plus Handles

Table 5 Fiber-Optic Adapters

Keysight Part Number Description

81000FI Connector Interface FC/PC/SPC

81000HI Connector Interface E-2000(PHYSICAL CONTACT)

81000KI Connector Interface SC

81000LI Connector Interface LC

16 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Keysight Part Number Description

NOTE

81000NI Connector Interface FC/APC, narrow key

81000SI Connector Interface DIN 47256/4108

81000VI Connector Interface ST

81000MI Connector Interface MU

Step 2. Consider Environmental Specifications

Review the following specifications to ensure that your operating or storage environment is suitable for the instrument.

Table 6

86120D 86122C

Getting Started 1

General Indoor use only

Operational

Temperature 0 to +55 °C 15 to 35 °C

Humidity < 95% R.H. at +40 °C < 75% R.H. at 35 °C

Storage

Temperature –40 °C to +70 °C –40 °C to +70 °C

Humidity < 90% R.H. at +65 °C for 24 hrs. < 95% R.H. at +40 °C for 5 day cycle

Humidity is type tested. Type tested means tested, but not warranted, for continuous operation.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 17

1 Getting Started

NOTE

Shock

120 g, half sine, 2 ms pulse

Shock is type tested.

Vibration

• Random, 2 g rms, 5-500 Hz, 10 minutes per axis

• Sine, 0.5 g (0 to peak), 5 to 500 Hz, 1 octave per minute.

Vibration is type tested.

Table 7

86120D 86122C

Power Requirements

Voltage 100 V / 115 V / 230 V / 240 V~ 100-240 V~

Frequency 50-60 Hz 50-60 Hz

Maximum Power 310 VA max 240 W

Weight 14.5 kg (32 lb) 14.5 kg (32 lb)

Dimensions

Height 138 mm (5.2 in) 138 mm (5.2 in)

Width 425 mm (16.7 in) 425 mm (16.7 in)

Depth 520 mm (20.5 in) 520 mm (20.5 in)

18 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 3. Configure for Bench Top or Rack Mount Use

NOTE

WARNING

The multi-wavelength meter is shipped ready for bench-top use. To configure the instrument for rack mount use, follow the steps below.

You must have a rack mount kit to continue with this procedure. Refer to

Accessories on page 16.

1 Ensure that the rack mount kit is complete

If any items are damaged or missing from the kit, contact the nearest Keysight Technologies sales or service office to order a replacement kit. Items within the kit are not individually available.

Table 8

Qty Description

Getting Started 1

2 Rack Mount Flange

6Screws

4Dress screws

2 Front Handle Assembly (86122A-1CP only)

2 Remove the side trim strips. 3 Attach rack mount flange with three screws per side.

Use only the screws the come with the rack mount kit. Longer screws may damage the instrument, and shorter screws may be unsafe.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 19

1 Getting Started

NOTE

Figure 2

Front Handle Assembly are included with Option 86122A-1CP only.

20 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 4. Connect a Keyboard and Mouse (Optional)

NOTE

You may connect a standard PC-compatible mouse and keyboard to the instrument. Refer to the figure below for PS/2 connections. You can also use the USB port for a USB keyboard and mouse. You can also connect USB mouse and keyboard with the USB port in the front panel of the instrument.

A keyboard and mouse are not supplied with the multi-wavelength meter.

Getting Started 1

Do not stack other objects on the keyboard; this will cause self-test failures at power-on

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 21

1 Getting Started

CAUTION

Step 5. Connect the Line Cord

Connect the line cord as shown in the figure below:

Figure 3

The product can operate from any single-phase AC power source supplying 100 – 240 V in the frequency range from 50 – 60 Hz. The maximum power consumption is 240 W. The power supply automatically adapts to the applied AC power (Auto Selection) and monitors the AC power range. The mains supply voltage fluctuation shall not exceed 10% of the specified supply voltage.

The product must be operated from a power source providing Line, grounded Neutral and Protective Earth (PE) connections. The instrument is not intended for operation from two phases of a multiphase ac system or across the legs of a single-phase, three-wire AC power system. Crest factor (ratio of peak voltage to rms.) should be typically within the range of 1.3 to 1.6 at 10% of the nominal rms. mains voltage.

22 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 6. Turn On the Line Power

NOTE

Press the power switch at the lower left-hand corner of the front panel. After stabilization of the internal reference laser the instrument will show application screen and is ready to use.

Getting Started 1

Figure 4

Interacting With the Display

The multi-wavelength meter is equipped with a touch screen display. You can explore the instrument’s functions and settings by touching elements on the display (such as menus, buttons, and other controls) with your finger or the supplied stylus.

You can also operate the instrument by using an optional mouse. For simplicity, the term “click” is used throughout this book to represent clicking or touching an element on the display. When you see the term “click,” please remember that you can always touch with your finger or stylus instead.

The display will always function as a touch screen, even when a mouse and keyboard are connected.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 23

1 Getting Started

CAUTION

Avoid touching the screen with a sharp object, as this could result in damage to the display. Use your finger or the supplied stylus.

Figure 5

24 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 7. Calibrate the Touch Screen (Optional)

NOTE

The touch screen calibration rarely needs to be performed.

Touch screen calibration ensures that the touch screen is both accurately aligned and orientated with the display. Therefore, when you touch an element on the display screen, the instrument can detect the task you want to perform.

1 On the Utility menu, click Touch Screen Calibration. The touch screen

calibration utility opens.

Getting Started 1

Figure 6

2 Touch the center of the X with your finger or a stylus. Several X will

appear on different positions of the display screen. Touch them precisely as the first one. When the display is calibrated, the touch screen configuration utility closes.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 25

1 Getting Started

NOTE

Figure 7

The calibration will time out within 10 seconds if you do not touch the center of the X. You can also press Esc on an optional keyboard to exit the touch screen calibration.

If you miss the center of the X by a significant amount, the instrument will display an error message and revert back to the previous calibration. This will prevent the touch screen from being rendered useless due to a poor calibration.

In case a failed touch screen calibration leads to a non-working condition, you can restart the touch screen calibration by using a USB mouse.

26 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 8. Set the Time and Date

1 Click the current time and date shown near the top of the display. The

Set Time and Date dialog box opens.

2 Enter the current time and date in one of the following ways:

• Click the time and date text boxes, and enter the desired number.

• Click the up or down arrows next to the time and date text boxes

until the desired number is displayed.

3 Click Set Time & Date Now to apply the changes and close the dialog

box.

Getting Started 1

Figure 8

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 27

1 Getting Started

NOTE

Step 9. Set the System Standby Mode

If the multi-wavelength meter has been inactive for a specified period of time, it will be switched into standby mode. When this happens, two things will occur:

• The LCD display indicates the standby mode.

• If the instrument is in Continuous sweep mode, the motor movement,

and any related data collection, will be suspended.

The internal reference laser is always on to allow the instrument to immediately make accurate measurements when it is reactivated.

Any subsequent activity, front-panel or remote, will reactivate the instrument and return it to it’s previous state. Using this feature can help extend the life of your instrument. To extend the life of the reference laser, you should turn off the instrument during long periods of inactivity (e.g. several hours or over night).

To configure standby mode

1 On the Setup menu, click Preferences. 2 Select a time-out period from the System Standby list. You can choose

15 min., 30 min., 1 hr., 4 hrs., or Never. Selecting Never disables this feature.

28 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

Figure 9

To reactivate the display

• Touch the display screen or a front panel button

• Move the mouse or press a key on the external keyboard (if attached)

• Send a remote command

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 29

1 Getting Started

NOTE

Step 10. Add a Printer

Use of a printer with the instrument is optional. Follow the steps of your printer’s documentation.

The multi-wavelength meter only supports USB and LAN printers (no parallel printer port).

1 In the File menu of the multi-wavelength meter software, click Print

Setup.

Figure 10

30 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

2 In the Print Setup window, click Properties…

a If the setup window is not fully visible, move the cursor to the lower

edge of the display to pan and scan the window within the visible area of the display.

Figure 11

b Using the pan and scan function, the lower end of the Printer

Properties window becomes accessible.

c Click OK /Cancel/Apply button to confirm, cancel or apply your

changes.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 31

1 Getting Started

CAUTION

Figure 12

Installation of programs other than drivers necessary for your printer is not recommended or supported. Installation of additional software could render the 86120D or 86122C multi-wavelength meter software inoperable.

32 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 11. Change Region and Language Settings

Follow the steps to change the region and language settings. 1 Exit the multi-wavelength meter software.

a On the Utilities menu, click Protected Functions. b Enter the protected functions password “exit to windows” and click

Activate.

Getting Started 1

Figure 13

2 From the Windows 7 Start menu, open the Control Panel. 3 In the Control Panel, click Clock, Language and Region.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 33

1 Getting Started

Figure 14

34 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

a The Region and Language window is not fully visible. Move the

cursor to the lower edge of the display to pan and scan the window within the visible area of the display.

Figure 15

b The Windows 7 task-bar may come up. In that case, move the

cursor slightly upwards until the task-bar disappears, and the lower edge of the active window becomes visible again.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 35

1 Getting Started

Figure 16

c Click OK /Cancel/Apply button to confirm, cancel or apply your

changes.

36 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

Figure 17

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 37

1 Getting Started

CAUTION

Step 12. Avoid Costly Repairs

Figure 18

Optical channel fiber-optic connectors are easily damaged when connected to dirty or damaged cables and accessories. When you use improper cleaning and handling techniques, you risk expensive instrument repairs, damaged cables, and compromised measurements. Before you connect any fiber-optic cable to the instrument, refer to

Cleaning Instructions on page 84.

38 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 13. For More Information

There are several ways to learn more about your multi-wavelength meter.

• Continue reading this book. Chapter 2, Using the Multi-Wavelength

Meter on page 63 will help you get started using this instrument.

• Refer to the Help. The Help opens the user’s and programmer’s guide in

PDF format.

• Visit our website at http://www.keysight.com. Use the keyword

"86120D" or “86122C” in your search.

Making Measurements

NOTE

CAUTION

Step 1. Consider Measurement Limitations

Getting Started 1

This chapter explains the steps required to make a measurement.

Before connecting a signal and making a measurement, please consider the following measurement limitations:

The front-panel OPTICAL INPUT connector uses a single-mode input fiber.

+10 dBm is the maximum total displayed input power. Do not exceed +18 dBm source power. The Keysight 86120D or 86122C’s input circuitry can be damaged when total input power exceeds this level.

Figure 19

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 39

1 Getting Started

CAUTION

WARNING

Cleaning Instructions on page 84.

Figure 20

Always remove both ends of fiber-optic cables from any instrument, system, or device before visually inspecting the fiber ends. Disable all optical sources before disconnecting fiber-optic cables. Failure to do so may result in permanent injury to your eyes.

40 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

Figure 21

• If the measured amplitudes are low, clean the front-panel OPTICAL

INPUT connector.

• The maximum input range for 86120D is 700-1700 nm and the

maximum input range for is 700 - 1650 nm.

• Laser line widths are assumed to be less than 10 GHz for 86120D, and

less than 2.5 GHz for 86122C.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 41

1 Getting Started

Step 2. Select Basic Measurement Setup Parameters

Basic measurement setup parameters that you should choose before making a measurement are medium, device type, units, and sweep mode.

Select the Medium

The multi-wavelength meter can display wavelength values in a vacuum, or in standard air

1 Press and click .

2 Click the Medium tab, and select In Air or In Vacuum. 3Click Close.

Figure 22

Select the Units

The instrument can display wavelength and amplitude values in several types of measurement units.

1 Press and click .

2 Click the Units tab, and select the wavelength and amplitude units. 3Click Close.

42 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Figure 23

Select the Device Type

You can optimize (or match) the measurement technique of the multi-wavelength meter to the type of device you are measuring – narrowband or broadband. Narrowband devices include DFB lasers and modes of Fabry-Perot lasers. Broadband devices include LEDs, optical filters, and chirped lasers.4

Getting Started 1

1Press and click

2 Click the Device Type tab, and select Narrowband or Broadband. 3Click Close.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 43

1 Getting Started

Figure 24

Select the Sweep Mode

• Press to initiate one measurement sweep. This is useful if

you want the data to remain static for saving results or printing.

• Press to continuously measure the input spectrum. In

this mode, a measurement sweeps occurs approximately every 0.3 seconds (86122C Option 110) or every 0.5 seconds (86122C Option

100) or every 0.6 seconds (86120D). This is useful if you want the data to be continuously updated.

You can also set up data logging to perform measurement sweeps at any desired interval. The green SWP indicator in the lower right-hand corner is lit when a measurement is being acquired.

44 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 3. Define Laser-Line Peaks

Peak criteria settings and wavelength limiting allow you to define how laser line peaks are measured.

How Laser-Line Peaks are Defined

A laser line will only be measured as a peak if the amplitude is greater than the peak threshold limit and the rise-and-fall (excursion) is greater than or equal to the peak excursion. In addition, peaks are only measured within the wavelength limits that you specify.

Getting Started 1

Figure 25

• In this figure, only three laser lines are identified as peaks: responses 1,

3, and 4.

• Response 2 is not identified as a peak because it is below the peak

threshold.

• Responses 4 and 5 are identified as one peak laser line. This is because

the minimum point between 4 and 5 does not drop to the peak excursion limit.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 45

1 Getting Started

Use Peak Criteria to Define Peaks

1Click .

2 Click the Peak Criteria tab. 3 Select Relative or Absolute threshold type. 4 Click the Threshold Value box and enter the threshold value. 5 Click the Peak Excursion box and enter the excursion value. 6Click Close.

Figure 26

Use Wavelength Limiting to Define Peaks

1Press and click

2 Click the Wavelength Limiting tab. 3 Select On 4 Click the Limit Start Wavelength box and enter the start wavelength

value.

46 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

5 Click the Limit Stop Wavelength box and enter the stop wavelength

value.

6Click Close.

Figure 27

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 47

1 Getting Started

Step 4. Make Measurements

The instrument can make a wide variety of wavelength and power measurements.

Peak Wavelength and Power

Press and click

Multiple Laser Lines

Press and click

Average Wavelength and Total Power

Press and click

Laser Channel Separation

It is often important to measure the wavelength and power separation between multiple laser lines. This is especially true in wavelength-division multiplexed (WDM) systems where channel spacing must be adhered to.

The Keysight multi-wavelength meter can display the wavelength and amplitude of any laser line relative to another.

1Press and click

2 Select a channel as the reference by clicking in the “Ref” column of the

desired row.

3 To determine channel spacing from the reference, simply read the

relative wavelength values in the “Delta WL” column.

48 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Laser Channel Flatness

You can use relative power measurements to measure flatness (pre-emphasis) in a WDM system. Simply select one carrier as the reference and measure the remaining carriers relative to the reference level. The power differences represent the system flatness.

1Press and click

2 Select the channel with the largest amplitude as the reference by

clicking in the “Ref” column of that peak’s row.

3 To determine channel flatness from the reference, simply read the

relative power values in the “Delta Pwr” column.

Laser Channel Separation/Flatness

You can also measure channel separation and flatness at the same time.

Press and click

Getting Started 1

Laser Drift

Laser drift can be easily measured by using the drift application.

Press . and click

Signal-to-Noise Ratio

Signal-to-noise ratio can be easily measured by using the OSNR application.

Press and click

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 49

1 Getting Started

Fabry-Perot Lasers

Fabry-Perot lasers can be easily measured by using the Fabry-Perot Laser application.

Press and click

Power Greater than 10 dBm

The maximum total input power that can be measured is 10 dBm. However, with the addition of an external attenuator, more power can be applied.This may be necessary at the transmit end of a wavelength-division multiplexed system where large signal levels are present. By entering a power offset equal to the amount of attenuation at the instrument’s input, accurate amplitude measurements are shown on the display.

1 Connect an optical attenuator between the front-panel OPTICAL

INPUT connector and the fiber-optic cable from your device. The attenuator must reduce the total input power to the Keysight multi-wavelength meter so that it is below +10 dBm.

2Press and click

3 Click the Power Offset tab. 4 Click the Power Offset box, and enter a power offset value. 5Click Close.

Power offset values are added to the display power readings. For example, if you placed a 10-dB attenuator on the front-panel connector, you should enter a power offset value of +10 dB. Negative values can also be entered if you connect an amplifier instead of an attenuator.

50 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Step 5. Adjust the Graph to Your Preference

After you have set up your measurement, you may wish to adjust the graph x-axis or move markers.

Adjust the X-Axis

You can adjust the x-axis in any of the following ways:

• Click and enter graph limits as start/stop or

center/span.

Getting Started 1

Figure 28

• Select an x-axis control from the Graph Control list. Click anywhere on

the graph and drag to the left or right.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 51

1 Getting Started

Figure 29

Figure 30

52 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Move the Peak Marker

You can move the peak marker in any of the following ways:

• Click any cell in the “Peak” column of the table. The peak marker will

move to the corresponding peak wavelength in the graph.

Getting Started 1

Figure 31

• If ClickZoom is enabled, click any cell in the “Wavelength” column of

the table.The peak marker will move the corresponding peak wavelength in the graph, and the graph will zoom in to that peak. To zoom out, click the “Wavelength” cell again.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 53

1 Getting Started

Figure 32

• Select Peak Marker from the Graph Control list. Click close to a peak on

the graph.

• Select Peak Marker from the Graph Control list. Click anywhere on the

graph and drag to the left or right.

54 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Getting Started 1

Figure 33

• Select Peak Marker from the Graph Control list. Click close to a peak on

the graph.

• Select Peak Marker from the Graph Control list. Click anywhere on the

graph and drag to the left or right.

Move the Trace Marker

You can move the trace marker in any of the following ways:

• Select Trace Marker from the Graph Control list. Click any point on the

graph.

• Select Trace Marker from the Graph Control list. Click anywhere on the

graph and drag to the left or right.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 55

1 Getting Started

Step 6. Save Measurement Results

After you have set up your measurement and the graphical display, you ay wish to save measurement results.

Save Data

Figure 34

Press to open the Save Meas Data dialog box. Select a file name

and click Save.

Print Data

Figure 35

Press to open the Print Setup dialog box. Select the Default

Printer and Printout Type, and click Print.

56 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Save Screen Image

Figure 36

On the File menu, point to Save, and then click Save Screen Image. Select a file name and click Save.

Getting Started 1

Figure 37

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 57

1 Getting Started

Data Logging

Data logging allows you to record measurement data over time for later analysis. Follow the steps below to set up data logging.

1 On the Measure menu, click Data Logging. 2 Enter the Logging Duration and Logging Interval time. 3 Click Start Data Logging.

Figure 38

Consider the following example applications:

• To log data for a long-term stability/drift test, set the data logging

duration to 24-hrs, and the interval to 5 minutes.

• To log data for a turn-on transient test (to observe how lasers change

during warm-up), set the data logging duration to 5 minutes, and the interval to 0 time (free run).

58 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Returning the Instrument for Service

The instructions in this section show you how to properly package the instrument for return to a Keysight Technologies service office. For a list ? of offices, refer to Keysight Technologies Service Offices on page 62.

If the instrument is still under warranty or is covered by a Keysight maintenance contract, it will be repaired under the terms of the warranty or contract (the warranty is at the front of this manual). If the instrument is no longer under warranty or is not covered by a Keysight maintenance plan, Keysight will notify you of the cost of the repair after examining the unit.

When an instrument is returned to a Keysight service office for servicing, it must be adequately packaged and have a complete description of the failure symptoms attached. When describing the failure, please be as specific as possible about the nature of the problem. Include copies of additional failure information (such as the instrument failure settings, data related to instrument failure, and error messages) with the instrument being returned. Backup your measurement related data before returning the instrument to Keysight service.

Please notify the service office before returning your instrument for service. Any special arrangements for the instrument can be discussed at his time. This will help the Keysight service office repair and return your instrument as quickly as possible.

Getting Started 1

Preparing the instrument for shipping

1 Write a complete description of the failure and attach it to the

instrument. Include any specific performance details related to the problem. The following information should be returned with the instrument.

• Type of service required.

• Date instrument was returned for repair.

• Description of the problem:

• Whether problem is constant or intermittent.

• Whether instrument is temperature-sensitive.

• Whether instrument is vibration-sensitive.

• Instrument settings required to reproduce the problem.

• Performance data.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 59

1 Getting Started

CAUTION

• Company name and return address.

• Name and phone number of technical contact person.

• Model number of returned instrument.

• Full serial number of returned instrument.

• List of any accessories returned with instrument.

2 Cover all front or rear-panel connectors that were originally covered

when you first received the instrument.

Cover electrical connectors to protect sensitive components from electrostatic damage. Cover optical connectors to protect them from damage due to physical contact or dust.

Instrument damage can result from using packaging materials other than the original materials. Never use styrene pellets as packaging material. They do not adequately cushion the instrument or prevent it from shifting in the carton. They may also cause instrument damage by generating static electricity.

60 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

3 Pack the instrument in the original shipping containers. Original

materials are available through any Keysight office. Or, use the following guidelines:

• Wrap the instrument in antistatic plastic to reduce the possibility of

damage caused by electrostatic discharge.

• For instruments weighing less than 54 kg (120 lb), use a

double-walled, corrugated cardboard carton of 159 kg (350 lb) test strength.

• The carton must be large enough to allow approximately 7 cm (3

inches) on all

• sides of the instrument for packing material, and strong enough to

accommodate

• the weight of the instrument.

• • Surround the equipment with approximately 7 cm (3 inches) of

packing material,

• to protect the instrument and prevent it from moving in the carton. If

packing

Getting Started 1

• foam is not available, the best alternative is S.D-240 Air Cap™ from

Sealed Air

• Corporation (Commerce, California 90001). Air Cap looks like a

plastic sheet

• filled with air bubbles. Use the pink (antistatic) Air Cap™ to reduce

static electricity.

• Wrapping the instrument several times in this material will protect

the instrument

• and prevent it from moving in the carton.

4 Seal the carton with strong nylon adhesive tape. 5 Mark the carton “FRAGILE, HANDLE WITH CARE”. 6 Retain copies of all shipping papers.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 61

1 Getting Started

Keysight Technologies Service Offices

Call Center

For technical assistance, you can contact your local Keysight Call Center.

•Visit http://www.keysight.com and click Contact Us.

Service Center

Before returning an instrument for service, you must first call the Keysight Technologies Instrument Support Center.

•Visit http://www.keysight.com and click Contact Us.

62 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Keysight 86120D and 86122C Multi-Wavelength Meters

User’s Guide

2 Using the

Multi-Wavelength Meter

Introduction / 64 Differences Between the 86120D, 86122C and Previous Models / 65 Front and Rear Panel Features / 68 Main Screen Layout / 70 Front Panel Buttons / 73 Menus / 76 Dialog Box Operation / 80 Hard Drive Recovery / 81

2 Using the 86122C

Introduction

The Keysight 86120D and 86122C Multi-Wavelength Meters measure the wavelength and optical power of laser light in the 1270–1650 nm wavelength range (700-1700 nm for 86120D). Because the instruments simultaneously measure multiple laser lines, you can characterize dense-wavelength-division-multiplexed (DWDM) systems and the multiple lines of Fabry-Perot lasers.

With the multi-wavelength meter you can quickly and easily measure the following parameters:

• Up to 1000 laser lines simultaneously

• Wavelengths and powers

• Average wavelength

•Total optical power

• Laser line separation

• Laser drift (wavelength and power)

• Optical signal-to-noise ratios

• Fabry-Perot lasers

64 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

This chapter gives you an overview of the front and rear panel, and the graphical user interface. In addition, it explains the steps required to make a measurement.

Differences Between the 86120D, 86122C and Previous Models

NOTE

The 86120D and 86122C are backward compatible with the 86120C. However, because of improvements in the 86120D and 86122C, there are some operational differences from the 86120C. For your convenience, these differences are listed below:

The command set of 86120D and 86122C is compatible with 86120B, 86120C, 86122A, and 86122B. The update rate of 86120D and 86122C option 110 is higher than the update rate of 86120C, 86122A, 86122B and 86122C option 100. This leads to differences in measurement time. Care must be taken when automated measurements are programmed using timers or wait states.

Differences in General Operation

• Update mode and number of points: The 86120C had two update

modes (normal and fast) with two different resolutions (15,047 and 7,525 data points). The 86122C Option 110 has one update mode with 3 sweeps/second; the 86122C Option 100 has one update mode with 2 sweeps/second. The 86122C has an increased resolution of 30,093 data points. The 86120D has one update mode with 1.6 sweeps/second and a resolution of 69722 data points.

For the 86120C, the command CALC1:TRAN:FREQ:POIN selects the normal (MAX) or fast (MIN) update mode. For the 86120D and 86122C, this command remains for backward compatibility. Without changing the resolution of the 86120D and 86122C, this command configures the queries SENSE:DATA? and CALC1:DATA? to return the number of data points used by the 86120C. To return all the data available with the 86120D and 86122C, use the new parameter EXT1 (CALC1:TRAN:FREQ:POIN EXT1).

• Elevation: There is no need to enter an elevation for the 86120D and

86122C because they have an internal weather station. The command SENS:CORR:ELEV remains for backward compatibility, but has no effect on the 86120D and 86122C.

• Data logging: This new feature of the 86120D and 86122C allows you

to record measurement data over time for later analysis.

Using the 86122C 2

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 65

2 Using the 86122C

• Drift Application: This application has been enhanced for the 86120D

and 86122C.

• Dropped/added channel s: If the number of channels changed during a

drift measurement, the 86120C would stop the measurement and generate an error. The 86120D and 86122C indicate if channels have been dropped or added, and continues the drift measurement. The query CALC3:DATA? DROP returns the peaks that have dropped or reappeared during a drift measurement.

• Wavelength masks: The 86120D and 86122C create wavelength masks

for each laser line, which limit how fast channels can drift without being measured as dropped. With each measurement sweep, these masks re-center around laser lines that have drifted less than 0.002 THz.

• Peak threshold: The 86120C peak threshold could only be set to a

relative value. The 86120D and 86122C peak threshold can be set to a relative or absolute value. The command CALC2:PTHR:MOD allows you to select between an absolute or relative peak threshold, and CALC2:PTHR:ABS allows you to set the absolute value.

Differences in Remote Commands

66 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

• CALC1:TRAN:FREQ:POIN: For the 86120C, this command selected the

normal (MAX) or fast (MIN) update mode. For the 86120D and 86122C, this command remains for backward compatibility. Without changing the resolution of the 86120D and 86122C, this command configures the queries SENSE:DATA? and CALC1:DATA? to return the number of data points used by the 86120C. To return all the data available with the 86120D and 86122C, use the new parameter EXT1 (CALC1:TRAN:FREQ:POIN EXT1).

• SENS:CORR:ELEV: For the 86120D and 86122C, this command has no

effect, and remains for backward compatibility only. There is no need to enter an elevation for the 86122C because it has an internal weather station.

• CALC3:DATA? DROP: For the 86120D and 86122C, this query returns

the peaks that have dropped or reappeared during a drift measurement.

• CALC2:PTHR:MOD: For the 86120D and 86122C, this command allows

you to select between an absolute or relative peak threshold.

• CALC2:PTHR:ABS: For the 86120D and 86122C, this command allows

you to set the absolute peak threshold value.

Using the 86122C 2

• CONF: For the 86120C, this command query returned the setting to be

used for the default FETCH or READ commands. For the 86120D and 86122C, this command query returns the current configuration of the instrument.

• SYST:VERS?: This query returns the SCPI compliance version. The

86120C version was 1995.0. The 86120D and 86122C version is 1999.0.

• DISP:UNIT:WAV: This new command allows you to set the wavelength

unit of the display.

• DISP:WIND2: The new commands in this subsystem allow you to

control or query the graphical display settings.

• HCOP:DEST, HCOP:MODE, HCOP:PRIN: These new commands allow

you to setup your printer and printout mode.

• MMEM: The new commands in this subsystem allow you to manage the

mass storage capabilities of the instrument.

• SYST:DATE and SYST:TIME: These new commands allow you to set or

query the date and time.

• Questionable status register bits 4 and 12: The 86120D and 86122C

use these bits.

• Power offset: The 86120C does not apply the current power offset to

power values returned from the FETC:ARR/SCAL:POW? and CALC2:DATA? POW commands. The 86120D and 86122C apply the power offset to these commands.

• Inverse centimeters and inverse meters unit suffix: The 86120C

applied an incorrect conversion for values with the /CM or /M suffix when converting to a commands internal unit (often Hertz). The 86120D and 86122C correctly convert /CM and /M to the corresponding internal value.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 67

2 Using the 86122C

Front and Rear Panel Features

Rear Panel

Figure 39

68 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

1Power: AC line 2 Mouse: PS/2 for optional mouse 3 Keyboard: PS/2 for optional keyboard 4 Video Output: SVGA 5 Digital Video Output: DVI 6 USB: For a USB keyboard and mouse. USB and LAN printers only (no

parallel printer port)

7 LAN: A keyboard must be used to set up LAN connectivity 8 GPIB: Fully programmable, complies with IEEE 488.2

Front Panel

Figure 40

1 Line button 2Touch screen display 3 Front panel buttons 4 Two USB 2.0 ports 5 Optical Input: 9/125 mm single-mode fiber

Using the 86122C 2

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 69

2 Using the 86122C

Main Screen Layout

The main screen of the multi-wavelength meter is shown below:

70 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Figure 41

The basic main screen components are described below. For more detailed information, refer to the Help.

1 Instrument Tool-bars: You can use the graphical toolbar to easily

access measurement setup, data view, and application functions. There is a dedicated toolbar for each function. To open the desired toolbar, press the front panel button that corresponds with the functions you want to perform.

2 Wavelength Limiting Status: Displays the wavelength limiting state. 3 Peak Criteria Button: Click this button to access the peak criteria

settings and change the definition of peak.

4 Graph Limit Button: Click this button access the graph limits settings

and define the x-axis limits of the graphical display.

5 Error Message Display Box: This area displays information about the

status of the instrument or an action that has been performed. Messages also appear to inform you of errors that may have occurred.

6 Marker Button: Click this button to enable or disable the trace marker.

Using the 86122C 2

7 Medium and Offset: Displays the selected medium and power offset

setting.

8 Data Display Buttons: These buttons allow you to can select one of

three types of data displays: split display, graph only, or table only.

9 Remote and Sweep Indicators: These indicators display the operating

and acquisition status of the instrument. When the instrument is in the remote operating mode or is acquiring data, the corresponding indicator is lit.

10 Number of Peaks Status: This indicator displays the number of peaks

currently detected that meet the specified peak criteria.

11 Graphical Display: The Keysight multi-wavelength meter has a

high-resolution touch screen that allows easy navigation of the instrument. You can also use a mouse. The graphical display shows the transformed, uncorrected frequency-domain measurement data in a spectrum analyzer type graph.

12 Front Panel Buttons: The 10 front panel buttons can be accessed with

your finger or a stylus.

13 Touch Screen Enable/Disable Button: Click or touch this button to

disable the pointing devices (touch screen and mouse). The indicator on the button changes from green to red.

When you disable the pointing devices, the mouse is confined to the region surrounding the disable button. You can then touch the graphical display without initiating a change to the instrument.

If you touch anywhere on the graphical display when the pointing devices are disabled, the disable button flashes yellow. To enable the pointing devices, click or touch this button again. The graphical display returns to its normal operating condition.

14 Set Time and Date: Click this button to access the time and date

controls. The instrument uses the date and time when performing various functions. For example,

• data logging

• listing files in MMEMory subsystem commands

• saving files

• saving screen images

• printing

15 Instrument Menus: The instrument menus provide access to all

functions.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 71

2 Using the 86122C

Graphs and Tables

This section describes the layout of the graph and table.

Figure 42

• A: The graph displays a measurement trace that plots wavelength

versus power for the entire span of the graph.

• B: The table lists precise measurement data for peak wavelengths.

• C: The trace marker allows you to find the approximate wavelength of

any point on the measurement trace. An area in the upper right corner of the graph displays the approximate trace marker wavelength, but not power.

• D: The horizontal green line represents the peak threshold, one of two

criteria used to define peak wavelengths. For more information, refer to Peak Criteria.

• E: The peak marker is always displayed and allows you to associate a

peak wavelength in the graph with a row of peak data in the table.

72 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Front Panel Buttons

Using the 86122C 2

The touch screen extends to the right of the LCD display. This area contains ten touchkeys buttons that can be accessed with your finger or a stylus. These are referred to as the front panel buttons. This section explains the function of each front panel button.

Figure 43

Press this button to return control of the instrument to the front panel. The Local and AC power buttons are the only front panel controls active when the instrument is in remote operation.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 73

2 Using the 86122C

Press this button to return the instrument to its factory default conditions.

The exceptions are:

• GPIB address

• references

• Printout type

• OSNR user wavelength

• Don’t Show this dialog on Startup check box

Press this button to exit the current measurement application and initiate an auto-measurement sequence.

Press this button to open the Setup toolbar. You can then modify a variety of measurement and display setup functions.

74 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Press this button to open the Data View toolbar. You can then configure the tabular display as desired

Press this button to open the Applications toolbar. You can then select your desired measurement application.

Press this button to place the instrument in single sweep mode and initiate a single sweep of the instrument.

Press this button to place the instrument in continuous sweep mode and initiate sweeping.

Using the 86122C 2

Press this button to open the Save Meas Data dialog box. Select a file name and click Save.

Press this button to open the Print Setup dialog box. Select the Default Printer and Printout Type, and click Print.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 75

2 Using the 86122C

Menus

The instrument menus provide access to all functions. This section shows the layout of each menu. For detailed information on each of these menus, refer to the Help.

The File menu

Figure 44

76 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

The View menu

Using the 86122C 2

Figure 45

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 77

2 Using the 86122C

The Setup menu

The Measure menu

78 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Figure 46

Figure 47

The Utilities menu

The Apps menu

Using the 86122C 2

Figure 48

Figure 49

The Help menu

Figure 50

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 79

2 Using the 86122C

Dialog Box Operation

Dialog boxes allow real-time changes to the instrument's settings. Because of this, the dialog boxes do not have OK, Apply, and Cancel buttons. When you have finished changing a setting, simply click Close.

Figure 51

80 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Hard Drive Recovery

WARNING

Using the 86122C 2

For recovery purposes there is an original factory image back-up of the instrument software. This image can be restored as follows:

All data on drive C: (system) will be overwritten by this procedure, D: (user data) will not be affected. Keysight recommends to regularly back-up your data to external media (e.g. USB hdd or USB flash memory) or to drives shared in a network.

1 Switch off the instrument. 2 Connect a USB or a PS2 keyboard to the instrument. 3 Switch on the instrument. 4 When the screen “Windows Boot Manager” appears press the cursor

down key within 5 seconds to select the entry “Keysight Recovery System”.

5Press <Enter> key. 6 Wait for the dialog “keysightRecoverySystem.vbs”. 7Press the 2 key for “Recover the original factory system image”. 8Press <Enter> key. A warning dialog will appear. 9Press <Enter> key to start the recovery. When completed the

instrument will restart.

10 Check the correct operation of the recovered system.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 81

Keysight 86120D and 86122C Multi-Wavelength Meters

User’s Guide

3 Cleaning Information

Cleaning Instructions / 84 Safety Precautions / 84 Why is it important to clean optical devices? / 84 What do I need for proper cleaning? / 85 Preserving Connectors / 90 How to clean connector interfaces / 92 How to clean bare fiber adapters / 93 How to clean instruments with a fixed connector interface / 94 Additional Cleaning Information / 95 Other Cleaning Hints / 95

3 Cleaning Information

Cleaning Instructions

Safety Precautions

The following Cleaning Instructions contain some general safety precautions, which must be observed during all phases of cleaning. Consult your specific optical device manuals or guides for full information on safety matters.

Please try, whenever possible, to use physically contacting connectors, and dry connections. Clean the connectors, interfaces, and bushings carefully after use.

If you are unsure of the correct cleaning procedure for your optical device, we recommend that you first try cleaning a dummy or test device.

Keysight Technologies assume no liability for the customer’s failure to comply with these requirements.

Please follow the following safety rules:

• Do not remove instrument covers when operating.

• Ensure that the instrument is switched off throughout the cleaning

procedures.

• Make sure that you disable all sources when you are cleaning any

optical interfaces.

• After cleaning, do not switch on optical sources when there is no

termination to the optical output connector, to the optical fiber or to the attached device. The laser radiation is not visible to the human eye, but it can seriously damage your eyesight.

• To prevent electrical shock, disconnect the instrument from the mains

before cleaning. Use a dry cloth, or one slightly dampened with water, to clean the external case parts. Do not attempt to clean internally.

• Refer servicing only to qualified and authorized personnel.

Why is it important to clean optical devices?

In transmission links optical fiber cores are about 9 μm (0.00035") in diameter. Dust and other particles, however, can range from tenths to hundredths of microns in diameter. Their comparative size means that they can cover a part of the end of a fiber core, and as a result will reduce the performance of your system.

84 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Furthermore, the power density may burn dust into the fiber and cause additional damage (for example, 0 dBm optical power in a single mode fiber causes a power density of approximately 16 million W/m2). If this happens, measurements become inaccurate and non-repeatable.

Cleaning is, therefore, an essential yet difficult task. Unfortunately, when comparing most published cleaning recommendations, you will discover that they contain several inconsistencies. In this section, we want to suggest ways to help you clean your various optical devices, and thus significantly improve the accuracy and repeatability of your light-wave measurements.

What do I need for proper cleaning?

Some Standard Cleaning Equipment is necessary for cleaning your instrument. For certain cleaning procedures, you may also require certain Additional Cleaning Equipment.

Standard Cleaning Equipment

Before you can start your cleaning procedure you need the following standard equipment:

• Dust and shutter caps

• Isopropyl alcohol

• Cotton swabs

• Soft tissues

• Pipe cleaner

• Compressed air

Cleaning Information 3

Dust and shutter caps

All of Keysight Technologies’ light-wave instruments are delivered with either laser shutter caps or dust caps on the light-wave adapter. Any cables come with covers to protect the cable ends from damage or contamination.

We suggest these protected coverings should be kept on the equipment at all times, except when your optical device is in use. Be careful when replacing dust caps after use. Do not press the bottom of the cap onto the fiber too hard, as any dust in the cap can scratch or pollute your fiber surface. If you need further dust caps, please contact your nearest Keysight Technologies sales office.

If you need further dust caps, please contact your nearest Keysight Technologies sales office.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 85

3 Cleaning Information

Isopropyl alcohol

This solvent is usually available from any local pharmaceutical supplier or chemist's shop.

If you use isopropyl alcohol to clean your optical device, do not immediately dry the surface with compressed air (except when you are cleaning very sensitive optical devices). This is because the dust and the dirt is solved and will leave behind filmy deposits after the alcohol is evaporated. You should therefore first remove the alcohol and the dust with a soft tissue, and then use compressed air to blow away any remaining filaments.

If possible avoid using denatured alcohol containing additives. Instead, apply alcohol used for medical purposes.

Never try to drink this alcohol, as it may seriously damage your health.

Do not use any other solvents, as some may damage plastic materials and claddings. Acetone, for example, will dissolve the epoxy used with fiber optic connectors. To avoid damage, only use isopropyl alcohol.

Cotton swabs

We recommend that you use swabs such as Q-tips or other cotton swabs normally available from local distributors of medical and hygiene products (for example, a supermarket or a chemist's shop). You may be able to obtain various sizes of swab. If this is the case, select the smallest size for your smallest devices.

Ensure that you use natural cotton swabs. Foam swabs will often leave behind filmy deposits after cleaning.

Use care when cleaning, and avoid pressing too hard onto your optical device with the swab. Too much pressure may scratch the surface, and could cause your device to become misaligned. It is advisable to rub gently over the surface using only a small circular movement.

Swabs should be used straight out of the packet, and never used twice. This is because dust and dirt in the atmosphere, or from a first cleaning, may collect on your swab and scratch the surface of your optical device.

Soft tissues

These are available from most stores and distributors of medical and hygiene products such as supermarkets or chemists' shops.

86 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Pipe cleaner

Cleaning Information 3

We recommend that you do not use normal cotton tissues, but multi-layered soft tissues made from non-recycled cellulose. Cellulose tissues are very absorbent and softer. Consequently, they will not scratch the surface of your device over time.

Use care when cleaning, and avoid pressing on your optical device with the tissue. Pressing too hard may lead to scratches on the surface or misalignment of your device. Just rub gently over the surface using a small circular movement.

Use only clean, fresh soft tissues and never apply them twice. Any dust and dirt from the air which collects on your tissue, or which has gathered after initial cleaning, may scratch and pollute your optical device.

Pipe cleaners can be purchased from tobacconists, and come in various shapes and sizes.The most suitable one to select for cleaning purposes has soft bristles, which will not produces scratches. There are many different kinds of pipe cleaner available from tobacco shops.

The best way to use a pipe cleaner is to push it in and out of the device opening (for example, when cleaning an interface). While you are cleaning, you should slowly rotate the pipe cleaner.

Only use pipe cleaners on connector interfaces or on feed through

adapters. Do not use them on optical head adapters, as the center of a pipe cleaner is hard metal and can damage the bottom of the adapter.

Your pipe cleaner should be new when you use it. If it has collected any dust or dirt, this can scratch or contaminate your device.

The tip and center of the pipe cleaner are made of metal. Avoid accidentally pressing these metal parts against the inside of the device, as this can cause scratches.

Compressed air

Compressed air can be purchased from any laboratory supplier.

It is essential that your compressed air is free of dust, water and oil. Only use clean, dry air. If not, this can lead to filmy deposits or scratches on the surface of your connector. This will reduce the performance of your transmission system.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 87

3 Cleaning Information

When spraying compressed air, hold the can upright. If the can is held at a slant, propellant could escape and dirty your optical device. First spray into the air, as the initial stream of compressed air could contain some condensation or propellant. Such condensation leaves behind a filmy deposit.

Please be friendly to your environment and use a CFC-free aerosol.

Additional Cleaning Equipment

Some Cleaning Procedures need the following equipment, which is not required to clean each instrument:

• Microscope with a magnification range about 50X up to 300X

• Ultrasonic bath

• Warm water and liquid soap

• Premoistened cleaning wipes

• Polymer film

• Infrared Sensor Card

Microscope with a magnification range about 50X up to 300X

A microscope can be found in most photography stores, or can be obtained through or specialist mail order companies. Special fiber-scopes are available from suppliers of splicing equipment.

Ideally, the light source on your microscope should be very flexible. This will allow you to examine your device closely and from different angles.

A microscope helps you to estimate the type and degree of dirt on your device. You can use a microscope to choose an appropriate cleaning method, and then to examine the results. You can also use your microscope to judge whether your optical device (such as a connector) is severely scratched and is, therefore, causing inaccurate measurements.

Ultrasonic bath

Ultrasonic baths are also available from photography or laboratory suppliers or specialist mail order companies.

An ultrasonic bath will gently remove fat and other stubborn dirt from your optical devices. This helps increase the life span of the optical devices.

Only use isopropyl alcohol in your ultrasonic bath, as other solvents may damage.

88 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Warm water and liquid soap

Only use water if you are sure that there is no other way of cleaning your optical device without corrosion or damage. Do not use hot water, as this may cause mechanical stress, which can damage your optical device.

Ensure that your liquid soap has no abrasive properties or perfume in it. You should also avoid normal washing-up liquid, as it can cover your device in an iridescent film after it has been air-dried.

Some lenses and mirrors also have a special coating, which may be sensitive to mechanical stress, or to fat and liquids. For this reason we recommend you do not touch them. If you are not sure how sensitive your device is to cleaning, please contact the manufacturer or your sales distributor.

Premoistened cleaning wipes

Use pre-moistened cleaning wipes as described in each individual cleaning procedure. Cleaning wipes may be used in every instance where a moistened soft tissue or cotton swab is applied.

Polymer film

Cleaning Information 3

Polymer film is available from laboratory suppliers or specialist mail order companies.

Using polymer film is a gentle method of cleaning extremely sensitive devices, such as reference reflectors and mirrors.

Infrared Sensor Card

Infrared sensor cards are available from laboratory suppliers or specialist mail order companies.

With this card you are able to control the shape of laser light emitted. The invisible laser beam is projected onto the sensor card, then becomes visible to the normal eye as a round spot.

Take care never to look into the end of a fiber or any other optical component, when they are in use. This is because the laser can seriously damage your eyes.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 89

3 Cleaning Information

Preserving Connectors

Listed below are some hints on how best to keep your connectors in the best possible condition.

Making Connections Before you make any connection you must ensure that all cables and connectors are clean. If they are dirty, use the appropriate cleaning procedure.

When inserting the ferrule of a patchcord into a connector or an adapter, make sure that the fiber end does not touch the outside of the mating connector or adapter. Otherwise you will rub the fiber end against an unsuitable surface, producing scratches and dirt deposits on the surface of your fiber.

Dust Caps and Shutter Caps Be careful when replacing dust caps after use. Do not press the bottom of the cap onto the fiber as any dust in the cap can scratch or dirty your fiber surface.

When you have finished cleaning, put the dust cap back on, or close the shutter cap if the equipment is not going to be used immediately.

Keep the caps on the equipment always when it is not in use.

All of Keysight Technologies’ lightwave instruments and accessories are shipped with either laser shutter caps or dust caps. If you need additional or replacement dust caps, contact your nearest Keysight Technologies Sales/Service Office.

Immersion Oil and Other Index Matching Compound s Where it is possible, do not use immersion oil or other index matching compounds with your device. They are liable to impair and dirty the surface of the device. In addition, the characteristics of your device can be changed and your measurement results affected.

Cleaning Instrument Housings

Use a dry and very soft cotton tissue to clean the instrument housing and the keypad. Do not open the instruments as there is a danger of electric shock, or electrostatic discharge. Opening the instrument can cause damage to sensitive components, and in addition your warranty will be voided.

90 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Which Cleaning Procedure should I use?

WARNING

Light d irt

If you just want to clean away light dirt, observe the following procedure for all devices:

• Use compressed air to blow away large particles.

• Clean the device with a dry cotton swab.

• Use compressed air to blow away any remaining filament left by the

swab.

Heavy dirt

If the above procedure is not enough to clean your instrument, follow one of the procedures below. Please consult Cleaning Instructions on page 84 for the procedure relevant for this instrument.

If you are unsure of how sensitive your device is to cleaning, please contact the manufacturer or your sales distributor.

How to clean connectors

Cleaning connectors is difficult as the core diameter of a single-mode fiber is only about 9 mm. This generally means you cannot see streaks or scratches on the surface. To be certain of the condition of the surface of your connector and to check it after cleaning, you need a microscope.

In the case of scratches, or of dust that has been burnt onto the surface of the connector, you may have no option but to polish the connector. This depends on the degree of dirtiness, or the depth of the scratches. This is a difficult procedure and should only be performed by skilled personal, and as a last resort as it wears out your connector.

Cleaning Information 3

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 91

Never look into the end of an optical cable that is connected to an active source.

To assess the projection of the emitted light beam you can use an infrared sensor card. Hold the card approximately 5 cm from the output of the connector. The invisible emitted light is project onto the card and becomes visible as a small circular spot.

3 Cleaning Information

CAUTION

Preferred Procedure

Use the following procedure on most occasions. 1 Clean the connector by rubbing a new, dry cotton-swab over the

surface using a small circular movement.

2 Blow away any remaining lint with compressed air.

Procedure for Stubborn Dirt

Use this procedure particularly when there is greasy dirt on the connector: 1 Moisten a new cotton-swab with isopropyl alcohol. 2 Clean the connector by rubbing the cotton-swab over the surface

using a small circular movement.

3 Take a new, dry soft-tissue and remove the alcohol, dissolved sediment

and dust, by rubbing gently over the surface using a small circular movement.

4 Blow away any remaining lint with compressed air.

An Alternative Procedure

A better, more gentle, but more expensive cleaning procedure is to use an ultrasonic bath with isopropyl alcohol.

1 Hold the tip of the connector in the bath for at least three minutes. 2 Take a new, dry soft-tissue and remove the alcohol, dissolved sediment

and dust, by rubbing gently over the surface using a small circular movement.

3 Blow away any remaining lint with compressed air.

92 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

How to clean connector interfaces

Be careful when using pipe-cleaners, as the core and the bristles of the pipe-cleaner are hard and can damage the interface.

Do not use pipe-cleaners on optical head adapters, as the hard core of normal pipe cleaners can damage the bottom of an adapter.

Preferred Procedure

CAUTION

Use the following procedure on most occasions. 1 Clean the interface by pushing and pulling a new, dry pipe-cleaner into

the opening. Rotate the pipe-cleaner slowly as you do this.

2 Then clean the interface by rubbing a new, dry cotton-swab over the

surface using a small circular movement.

3 Blow away any remaining lint with compressed air.

Procedure for Stubborn Dirt

Use this procedure particularly when there is greasy dirt on the interface: 1 Moisten a new pipe-cleaner with isopropyl alcohol. 2 Clean the interface by pushing and pulling the pipe-cleaner into the

opening. Rotate the pipe-cleaner slowly as you do this.

3 Moisten a new cotton-swab with isopropyl alcohol. 4 Clean the interface by rubbing the cotton-swab over the surface using

a small circular movement.

5 Using a new, dry pipe-cleaner, and a new, dry cotton-swab remove the

alcohol, any dissolved sediment and dust.

6 Blow away any remaining lint with compressed air.

Cleaning Information 3

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 93

How to clean bare fiber adapters

Bare fiber adapters are difficult to clean. Protect from dust unless they are in use.

Never use any kind of solvent when cleaning a bare fiber adapter as solvents can damage the foam inside some adapters.

They can deposit dissolved dirt in the groove, which can then dirty the surface of an inserted fiber.

Preferred Procedure

Use the following procedure on most occasions. 1 Blow away any dust or dirt with compressed air.

3 Cleaning Information

CAUTION

Procedure for Stubborn Dirt

Use this procedure particularly when there is greasy dirt on the adapter: 1 Clean the adapter by pushing and pulling a new, dry pipe-cleaner into

the opening. Rotate the pipe-cleaner slowly as you do this.

Be careful when using pipe-cleaners, as the core and the bristles of the pipe-cleaner are hard and can damage the adapter.

2 Clean the adapter by rubbing a new, dry cotton-swab over the surface

using a small circular movement.

3 Blow away any remaining lint with compressed air.

How to clean instruments with a fixed connector interface

You should only clean instruments with a fixed connector interface when it is absolutely necessary. This is because it is difficult to remove any used alcohol or filaments from the input of the optical block.

It is important, therefore, to keep dust caps on the equipment at all times, except when your optical device is in use.

94 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

If you do discover filaments or particles, the only way to clean a fixed connector interface and the input of the optical block is to use compressed air.

If there are fluids or fat in the connector, please refer the instrument to the skilled personnel of Keysight’s service team.

Only use clean, dry compressed air. Make sure that the air is free of dust, water, and oil. If the air that you use is not clean and dry, this can lead to filmy deposits or scratches on the surface of your connector interface. This will degrade the performance of your transmission system.

Never try to open the instrument and clean the optical block by yourself, because it is easy to scratch optical components, and cause them to be misaligned.

Additional Cleaning Information

The following cleaning procedure may be used with other optical equipment:

How to clean bare fiber ends

Bare fiber ends are often used for splices or, together with other optical components, to create a parallel beam. The end of a fiber can often be scratched. You make a new cleave. To do this:

1 Strip off the cladding. 2 Take a new soft-tissue and moisten it with isopropyl alcohol. 3 Carefully clean the bare fiber with this tissue. 4 Make your cleave and immediately insert the fiber into your bare fiber

adapter in order to protect the surface from dirt.

Other Cleaning Hints

Selecting the correct cleaning method is an important element in maintaining your equipment and saving you time and money. This

Appendix highlights the main cleaning methods, but cannot address every individual circumstance.

This section contain some additional hints which we hope will help you further. For further information, please contact your local Keysight Technologies representative.

Making the connection Before you make any connection you must ensure that all light-wave cables and connectors are clean. If not, then use appropriate the cleaning methods.

When you insert the ferrule of a patch-cord into a connector or an adapter, ensure that the fiber end does not touch the outside of the mating connector or adapter. Otherwise, the fiber end will rub up against something which could scratch it and leave deposits.

Cleaning Information 3

Lens cleaning papers Note that some special lens cleaning papers are not suitable for cleaning optical devices like connectors, interfaces, lenses, mirrors and so on. To be absolutely certain that a cleaning paper is applicable, please ask the salesperson or the manufacturer.

Immersion oil and other index matching compounds Do not use immersion oil or other index matching compounds with optical sensors equipped with recessed lenses. They are liable to dirty the detector and impair its performance. They may also alter the property of depiction of your optical device, thus rendering your measurements inaccurate.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 95

3 Cleaning Information

Cleaning the housing and the mainframe When cleaning either the mainframe or the housing of your instrument, only use a dry and very soft cotton tissue on the surfaces and the numeric pad.

Never open the instruments as they can be damaged. Opening the instruments puts you in danger of receiving an electrical shock from your device, and renders your warranty void.

96 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Keysight 86120D and 86122C Multi-Wavelength Meters

User’s Guide

4 Specifications and

Regulatory Information

Definitions of Terms / 98 Specifications / 100 Compliance with German Noise Requirements / 103 Compliance with Canadian EMC Requirements / 103 Declaration of Conformity / 103

4 Specifications and Regulatory Information

Definitions of Terms

Characteristics and Specifications

The distinction between specifications and characteristics is described as follows:

• Specifications describe warranted performance.

• Characteristics provide useful, but non-warranted information about

the functions and performance of the instrument.

• General Characteristics give additional information for using the

instrument. These are general descriptive terms that do not imply a level of performance.

Wavelength

• Range refers to the allowable wavelength range of the optical input

signal.

• Absolute accuracy indicates the maximum wavelength error over the

allowed environmental conditions.

• Differential accuracy indicates the maximum wavelength error in

measuring the wavelength difference between two signals that are simultaneously present.

• Minimum resolvable separation indicates the minimum wavelength

separation of two laser lines input required to measure each wavelength simultaneously. Two laser lines closer in wavelength than the minimum resolvable separation are not resolved and one average wavelength is displayed.

• Display resolution indicates the minimum incremental change in

displayed wavelength.

Power

• Calibration accuracy indicates the maximum power calibration error at

the specified wavelengths over the allowed environmental conditions.

• Flatness refers to the maximum amplitude error in a measurement

between two lines that are separated in wavelength by no more than the specified amount.

• Linearity indicates the maximum power error in measuring the change

in power of one laser line.

• Polarization dependence indicates the maximum displayed power

variation as the polarization of the input signal is varied.

98 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Specifications and Regulatory Information 4

• Display resolution indicates the minimum incremental change in

displayed power.

Sensitivity

• Sensitivity is defined as the minimum power level of a single laser line

input to measure wavelength and power accurately. A laser line with less than the minimum power may be measured but with reduced wavelength and power accuracy. For multiple laser lines input, sensitivity may be limited by total input power.

Selectivity

• Selectivity indicates the ability to measure the wavelength and power of

a weak laser line in the proximity of a specified stronger laser line and separated by the specified amount.

Input power

• Maximum displayed level indicates the maximum total input power

(total of all laser lines present) to accurately measure wavelength and power.

• Maximum safe input power indicates the maximum total input power

(total of all laser lines present) to avoid permanent optical damage to the instrument.

Maximum number of lines input

Maximum number of lines input is the maximum number of displayed lines. If more than the specified number of lines is input, only the longest wavelength lines are displayed.

Input return loss

Input return loss indicates the optical power reflected back to the user’s fiber cable relative to the input power. It is limited by the return loss of the front panel connector, and assumes the user’s connector is good.

Measurement cycle time

Measurement cycle time refers to the cycle time when measuring wavelength and power of laser lines. Specific advanced applications may require longer cycle times.

Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide 99

4 Specifications and Regulatory Information

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86120D 86122C Notes

Wavelength

Range Operating range

700 to 1650 nm (182 to 428 THz) 700 to 1700 nm (176 to 428 THz)

1270 to 1650 nm (182 to 236 THz) For lines separated by

less than or linewidth

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amount, wavelength accuracy is reduced. For laser lines separated

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86120D) and linewidths

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86120D).

Absolute accuracy

± 1.5 ppm typ. ± 1 ppm (within 15 °C to 35 °C)

± 0.2 ppm (within 15°C to 35°C)

At 1550 nm ± 2.3 pm ± 0.3 pm

At 1310 nm ± 2.1 pm ± 0.3 pm

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± 0.4 ppm ± 0.15 ppm

Minimum resolvable separation

(equal power lines input)

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At 1550 nm 0.12 nm 0.04 nm At 1310 nm 0.09 nm 0.03 nm

Display resolution

0.0001 nm

Units nm (vacuum or standard air), cm

–1

, THz

Power

Calibration accuracy

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1310 nm, and 1550 nm)

± 0.5 dB

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Flatness

± 0.2 dB (1200 to 1600 nm) ± 0.2 dB (1270 to 1600 nm) QPIURPDQ\

wavelength

± 0.5 dB (700 to 1650 nm) ± 0.5 dB (1270 to 1650 nm) Linearity ± 0.3 dB (1200 to 1600 nm) ± 0.3 dB (1270 to 1600 nm) Lines above –30 dBm Polarization dependence ± 0.6 dB(1200 to 1600 nm) ± 0.6 dB (1270 to 1600 nm)

± 1.5 dB

(700 to 1650 nm) ± 1.0 dB 1 (1600 to 1650 nm) Display resolution 0.01 dB Units dBm, mW, μW

Sensitivity

Single line input –20 dBm (700 to 900 nm) NA Single measurement,

without averaging

–25 dBm

(800 to 1200 nm) NA

–40 dBm

(1200 to 1600 nm) –32 dBm (1270 to 1600 nm)

–30 dBm

(1600 to 1650 nm) –22 dBm (1600 to 1650 nm)

Multiple lines input

30 dB below total input power, but not less than single line input sensitivity

Selectivity

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Specifications

100 Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide

Keysight Technologies 86120D, 86122C User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

1 Getting Started

General Safety Considerations

Setting Up the Multi-Wavelength Meter

Making Measurements

Returning the Instrument for Service

Keysight Technologies Service Offices

Introduction

Differences Between the 86120D, 86122C and Previous Models

Front and Rear Panel Features

Main Screen Layout

Graphs and Tables

Front Panel Buttons

Menus

Dialog Box Operation

Hard Drive Recovery

3 Cleaning Information

Cleaning Instructions

Definitions of Terms

Specifications