Keysight N77 Series User Manual

Keysight N77 Series User Manual

Optical switch
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  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 Keysight N77xx Series Optical Switch User’s Guide...
  • Page 4 OR OF ANY INFORMATION hazard. It calls attention to an CONTAINED HEREIN. SHOULD Herrenberger Str. 130 operating procedure, practice, KEYSIGHT AND THE USER HAVE A or the like that, if not correctly 71034 Böblingen, Germany SEPARATE WRITTEN AGREEMENT performed or adhered to, could...
  • Page 5: Table Of Contents

    Contents Getting Started Overview Keysight N773x Optical Switch Initial Inspection Claims and Repackaging Claims and Repackaging Return Shipments to Keysight Technologies 9 Safety Considerations Safety Considerations - Overview Safety Symbols General Operating Environment Line Power Requirements Input/Output Signals Line Power Connectors...
  • Page 6 Connecting over LAN N77xx Viewer Common User Interface Functions Software Installation Connecting to an Instrument Viewing Measurements and Settings Saving and Recalling Configurations Controlling the Instrument Refresh Switch Operation Using the Optical Switch Controlling the Optical Switch Keysight N77xx Series Optical Switch...
  • Page 7 Keysight E-mail Updates 57 Keysight Direct Keysight Open www.keysight.com Instrument Options and Accessories Instrument Option and Accessories - Overview Instrument and Options - Keysight N7731A and N7734A 62 Cables Maintenance and Troubleshooting Maintenance and Troubleshooting - Overview Keysight N77xx Series Optical Switch...
  • Page 8 How to clean connector adapters How to clean bare fiber adapters How to clean optical glass plates Additional Cleaning Information Other Cleaning Hints Firmware Upgrades Error Messages SYST:ERR? Data Sanitation Memory Inventory Clearing User Data Index Keysight N77xx Series Optical Switch...
  • Page 9: Overview

    “Connecting to the Instrument - Overview” on page 28 Keysight N773x Optical Switch The Keysight N77-Series optical switches are available for both single- mode and multimode fiber test applications. The excellent repeatability, compact format and flexible control interfacing support high- performance automated setups.
  • Page 10: Getting Started

    For dependable multimode transceiver testing, the instrument used to set the power level should not change this modal distribution. The Keysight multimode switches are designed with very short collimated paths between fiber, so signals propagate in practically the same distribution as through uninterrupted multimode fiber.
  • Page 11: Claims And Repackaging

    Return Shipments to Keysight Technologies If the instrument is to be shipped to an Keysight Technologies Sales/Service Office, attach a tag showing owner, return address, model number and full serial number and the type of service required.
  • Page 12: Safety Considerations

    Keysight Technologies Inc. assumes no liability for the customer’s failure to comply with these requirements. This product has been designed and tested in accordance with IEC...
  • Page 13: General

    To avoid hazardous electrical shock, do not perform electrical tests when there W A R N I N G are signs of shipping damage to any portion of the outer enclosure (covers, panels, and so on). Keysight N77xx Series Optical Switch...
  • Page 14: Operating Environment

    The type of power cable shipped with each instrument depends on the country of destination. Please refer to “Instrument Option and Accessories - Overview” on page 61“ for the part numbers of available power cables. Keysight N77xx Series Optical Switch...
  • Page 15: Instrument Markings

    European Community The CSA mark is a registered trademark of the Canadian Standards Association. The C-Tick or RCM mark is the certification mark of the Australian Communications Authority. The KC mark is the Korean certification mark. Keysight N77xx Series Optical Switch...
  • Page 16: Ac Line Power Supply Requirements

    The recycling symbol indicates the general ease with which the instrument can be recycled. 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 or more information. AC Line Power Supply Requirements...
  • Page 17 Do not negate this protective action by using an extension cord without a protective conductor. • Do not interrupt the protective earth connection intentionally. The AC power requirements are summarized on the rear panel of the instrument. Keysight N77xx Series Optical Switch...
  • Page 18: Changing The Fuse

    There is no user replaceable fuse for the instrument. Changing the fuse should be C A U T I O N carried out only by Keysight Technologies service personnel. If you need to get the fuse replaced refer to your nearest Keysight Technologies Sales/Service Office.
  • Page 19: Humidity

    75 mm (3 inches) of clearance at the rear, and at least 25 mm (1 inch) of clearance at each side. Failure to provide adequate air clearance may result in excessive internal temperature, reducing instrument reliability. The instrument should not be operated when resting on its rear or side panels. Keysight N77xx Series Optical Switch...
  • Page 20: Input And Output Connectors

    Getting Started Figure 3 Correct Operating Position (shown here for the Keysight N7744/5A, valid also for the N7751/2A, Keysight N7761/2/4A, N7766/68A, N773xA, and the N7711/4A) Input and Output Connectors Input and Output Connectors - Overview This section provides information on: •...
  • Page 21: Front Panels - Optical Switches

    Getting Started Front Panels - Optical Switches Figure 4 Front panel of the Keysight N7731A 2-Channel 1x4 Optical Switch Figure 5 Front panel of the Keysight N7734A 1-Channel 1x13 Optical Switch Rear Panel Figure 6 Rear panel of the Keysight N77 Series instruments.
  • Page 22: Making Optical Connections

    You cannot connect angled non-contact fiber end connectors with orange sleeves N O T E directly to the attenuator, laser, or switch. Keysight N77xx Series Optical Switch...
  • Page 23: Electrical Connectors

    (private or site) used. If a network configuration has not been determined, refer to the following considerations concerning each type. Private LAN Considerations Among the basic parameters of a private LAN network to consider are security, performance, reliability, and IP address availability. Keysight N77xx Series Optical Switch...
  • Page 24: Security

    IP addresses available is limited. By using a router with Dynamic Host Configuration Protocol (DHCP) capability on a private network, the router can assign an IP address to each instrument thus creating a sub-network (subnet) that does not consume site IP addresses. Keysight N77xx Series Optical Switch...
  • Page 25: Site Lan Considerations

    A standard LAN cable can be used instead. For private LAN networks that include a switch or router, use standard LAN cables for all network connections. Do not use a crossover cable. Keysight N77xx Series Optical Switch...
  • Page 26 LXI device identification proceeds you will see the following indicators:, Figure 10 The LAN LED There may be a delay between making the LAN link (yellow status) and getting the IP address (green status). This delay may be longer if there Keysight N77xx Series Optical Switch...
  • Page 27: Gpib Interface

    Pressing and holding the button for 3 seconds will reset the LAN parameters to the factory default. This includes changing the password for modifying the configuration via LAN back to the default "Keysight". This is equivalent to the following sequence of programming commands: :SYSTem:COMMunicate:ETHernet:RESet...
  • Page 28: Connector

    Connector Part Number: 1251-0293 Figure 11 GPIB Connector Keysight Technologies products delivered now are equipped with connectors C A U T I O N having ISO metric-threaded lock screws and stud mounts (ISO M3.5×0.6) that are black in color. Earlier connectors may have lock screws and stud mounts with English-threaded lock screws and stud mounts (6-32 UNC) that have a shiny nickel finish.
  • Page 29: Usb Interface

    The GPIB line screens are not isolated from ground. N O T E USB Interface Before connecting the instrument over USB, install the Keysight I/O Libraries N O T E Suite, which is included on a CD with the instrument.
  • Page 30: Front Panel Indicators

    Keysight N7751/2A Optical Attenuator and Power Meter, or an Keysight N7761/2/4/6/8A Optical Attenuator or an Keysight N7711/4A Tunable Laser System Source or an N773x Optical Switch. 1 If it is not already running, start the Keysight Connection Expert software. Keysight N77xx Series Optical Switch...
  • Page 31 When the instrument is connected, it is shown in the list. Figure 15 Select the instrument in the list 3 Select the instrument in the list to see the associated tasks (in the Task Guide on the left) and information (on the right). Keysight N77xx Series Optical Switch...
  • Page 32: Finding The Ip Address Of An Instrument

    2 Select the instrument in the list. Figure 16 Select the instrument 3 Click on Send commands to this instrument. The default command is the *IDN? query. Figure 17 *IDN? query 4 Enter the command :SYSTem:COMMunicate:ETHernet:IPADdress:CURRent? Keysight N77xx Series Optical Switch...
  • Page 33: Connecting Over Lan

    LED on the front panel is green. See, “LAN Interface” on page 21 more information to connecting over LAN. 2 If it is not already running, start the Keysight Connection Expert software. 3 Select LAN (TCPIP0) in the list. Keysight N77xx Series Optical Switch...
  • Page 34 5 Wait for the scan to finish. 6 Select the instrument in the list. Figure 20 7 To show the description of the instrument, check the box for *IDN? query and click on Find Again. Keysight N77xx Series Optical Switch...
  • Page 35 8 Select the instrument in the list to see the associated tasks (in the Task Guide on the left) and information (on the right). – For the N774x Multiport power meters, click on the Instrument Web Interface button to control the instrument directly. Keysight N77xx Series Optical Switch...
  • Page 36 Basic configuration and functionality are available from this web page. – For the attenuators, and as an alternative for the power meters, you can control any of the instruments from the Keysight N77xx Viewer. Connecting and using the N77xx Viewer is described in next section.
  • Page 37: N77Xx Viewer Common User Interface Functions

    Windows operating system. The installation package is distributed on the instrument CD and is available on the internet via the Package Manager at www.keysight.com/find/n7700. Using the Viewer also requires a VISA package to be installed, usually with the Keysight IO Library Suite.
  • Page 38 3 The list shows instruments that have been given a VISA address. If your instrument is not in the list, • Use the Keysight Connection Expert to check your instrument has a VISA address • Click on the Scan Again button.
  • Page 39 5 For instruments you use regularly, you can add a link on your desktop by putting a check mark in the box to Place a shortcut on the Desktop. 6 Click on the OK button to finish the connection. Keysight N77xx Series Optical Switch...
  • Page 40: Viewing Measurements And Settings

    Viewing a single channel 1 Click on the New button to open a window with the current measurement and parameter settings. Figure 25 Viewing the measurement on a single channel attenuator/power meter (left) or tunable laser (right) Keysight N77xx Series Optical Switch...
  • Page 41: Saving And Recalling Configurations

    You can save the current measurement configuration to either of two settings stored on the instrument. 1 In the File menu, select Save. 2 Enter or select the setting to which you want to save it. Keysight N77xx Series Optical Switch...
  • Page 42: Controlling The Instrument Refresh

    Stop and start the display of all changes. Make sure to put a check in the box for Update enabled, to enable the N77xx Viewer to display the status and results from the instrument. If there is no Keysight N77xx Series Optical Switch...
  • Page 43 This is useful if, for example, more than one person can control the instrument. 2 When you have set all the values, click on the OK button. Keysight N77xx Series Optical Switch...
  • Page 44 Getting Started Keysight N77xx Series Optical Switch...
  • Page 45: Switch Operation

    User's Guide Switch Operation Using the Optical Switch This chapter describes how to use the Keysight N773x optical switches, particularly with the N77xx Viewer or web-based control software. For use in an automated setup, please refer also to the N77- Series Programming Guide.
  • Page 46 Then select the tab Technical Support followed by Drivers & Software. On this webpage you will also find additional software tools like: • Firmware update utility • Firmware update file • VXI Plug&Play Drivers Keysight N77xx Series Optical Switch...
  • Page 47: Typical Applications

    DUT. Figure 30 Laser source selection Select different measurement and analysis paths. In the following diagram the switch is used to select between the measurement path and the calibration path. Figure 31 Measurement path selection Keysight N77xx Series Optical Switch...
  • Page 48: X 2 Switch

    Figure 33 Selection of one from several DUTs in parallel test setups Alternatively this switch can be used to automatically select one from up to four different analyzing instruments. Once again there are Keysight N77xx Series Optical Switch...
  • Page 49 Switch Operation advantages to be gained through the speed in changing the test setup, and the repeatability of measurements. Figure 34 Selection of one from several analyzing instruments Keysight N77xx Series Optical Switch...
  • Page 50 Switch Operation Keysight N77xx Series Optical Switch...
  • Page 51: Specifications And Regulations Compliance

    Keysight N77xx Series Optical Switch User's Guide Specifications and Regulations Compliance Definition of Terms This section defines terms that are used both in this manual. Specification: describes a guaranteed product performance that is valid under the specified conditions. (The confidence level used is 95%, as recommended by the ISO standard).
  • Page 52 = power measured at the switch output port j. bi,j Figure 36 Insertion Loss Test Setup Conditions: Wavelength as specified. Using patchcords with high quality connectors in perfect optical condition. Insertion loss includes the loss of one additional connection. N O T E Keysight N77xx Series Optical Switch...
  • Page 53 Connector with perfect optical quality. Depending on the option, straight or angled FC. Repeatability The uncertainty in reproducing the Insertion loss (IL) after repeated Actuation Cycle. The repeatability is ± half the span between the maximum and the minimum values, expressed in dB. Keysight N77xx Series Optical Switch...
  • Page 54 All optical connectors in perfect optical condition. Switching Time Maximum time needed to stabilize the optical output power when switching. This is applicable for all input-output combinations and for risetime and falltime, as described in the figure below. Keysight N77xx Series Optical Switch...
  • Page 55: Literature

    Literature 1 Fiber optic test and measurement, Hewlett Packard Professional Books, edited by Prentice Hall, ISBN 0-13-534330-5 2 GR -1073-CORE, Generic Requirements for Single Mode Fiber Optic Switches (Issue 1, January 2001, Telcordia Technologies) Keysight N77xx Series Optical Switch...
  • Page 56: Technical Specifications - Optical Switch

    Specifications and Regulations Compliance Keysight N77xx Series Optical Switch...
  • Page 57: General Characteristics - Optical Switch

    Specifications and Regulations Compliance Keysight N77xx Series Optical Switch...
  • Page 58 Specifications and Regulations Compliance The latest version of the Declaration of Conformity can be found here http://www.keysight.com/go/conformity Keysight N77xx Series Optical Switch...
  • Page 59: Regulations Information

    You will always have the utmost confidence in your measurements. Keysight offers a wide range of additional expert test and measurement services for your equipment, including initial start- up assistance, onsite education and training, as well as design, system integration, and project management.
  • Page 60: Keysight Direct

    I/O and global support, which are combined to more easily integrate test system development. www.keysight.com/find/open LXI is the LAN-based successor to GPIB, providing faster, more efficient connectivity. Keysight is a founding member of the LXI consortium. www.lxistandard.org Keysight N77xx Series Optical Switch...
  • Page 61: Www.keysight.com

    Specifications and Regulations Compliance www.keysight.com For more information on Keysight Technologies products, applications and services, please contact your local Keysight office. The complete list is available at: www.keysight.com/find/contactus Keysight N77xx Series Optical Switch...
  • Page 62 Specifications and Regulations Compliance Keysight N77xx Series Optical Switch...
  • Page 63: Instrument Options And Accessories

    Keysight N77xx Series Optical Switch User's Guide Instrument Options and Accessories Instrument Option and Accessories - Overview The instruments are available in various configurations for the best possible match to the most common applications. This chapter provides information on the available options and...
  • Page 64: Instrument And Options - Keysight N7731A And N7734A

    Instrument Options and Accessories Instrument and Options - Keysight N7731A and N7734A Cables • GPIB Cable, 10833A, 1 m (3.3 feet) • GPIB Cable, 10833B, 2 m (6.6 feet) • GPIB Cable, 10833C, 4 m (13.2 feet) • GPIB Cable, 10833D, 0.5 m (1.6 feet)
  • Page 65 GPIB Adapter, 10834A, 2.3 cm extender. Use this adapter if there is no space to connect your GPIB cable directly to a GPIB interface. • USB Cable, 8121-1243, 2 m (6.6 feet) • Cross-over LAN cable, 5061-0701, 2.1 m (7 feet) Keysight N77xx Series Optical Switch...
  • Page 66 Instrument Options and Accessories Keysight N77xx Series Optical Switch...
  • Page 67: Maintenance And Troubleshooting

    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.
  • Page 68 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. Keysight N77xx Series Optical Switch...
  • Page 69 • Compressed air Dust and shutter caps All of Keysight Technologies’ lightwave instruments are delivered with either laser shutter caps or dust caps on the lightwave adapter. Any cables come with covers to protect the cable ends from damage or contamination.
  • Page 70 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. Keysight N77xx Series Optical Switch...
  • Page 71 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 Keysight N77xx Series Optical Switch...
  • Page 72 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. Keysight N77xx Series Optical Switch...
  • Page 73 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 N77xx Series Optical Switch...
  • Page 74 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 Compounds Where it is possible, do not use immersion oil or other index matching compounds with your device.
  • Page 75 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. Keysight N77xx Series Optical Switch...
  • Page 76 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. Keysight N77xx Series Optical Switch...
  • Page 77 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. Keysight N77xx Series Optical Switch...
  • Page 78 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. Keysight N77xx Series Optical Switch...
  • Page 79 Firmware Upgrades Updated versions of the firmware for your instrument may be released from time to time. These will then be available from the Keysight web page (www.keysight.com/find/octfirmware) and will include the update application and instructions.
  • Page 80 Clearing User Data Clearing the DRAM All data in the DRAM is cleared by powering the instrument off. Clearing the Flash ROM The user data can be cleared from the Flash ROM by: Keysight N77xx Series Optical Switch...
  • Page 81 VISA Assistant (for example over USB). Send the command: SYSTem:COMMunicate:ETHernet:RESet b With the instrument connected over the LAN (the LAN LED is green), press and hold the LAN Reset button for more than 3s. In either case, the instrument reboots. Keysight N77xx Series Optical Switch...
  • Page 82 Maintenance and Troubleshooting Keysight N77xx Series Optical Switch...
  • Page 83 LAN Interface, 7 Line Power Cable, 14 Line Power Connectors, 12 Safety, 10 Line Power Requirements, 12 Safety Considerations, 7, 10 DRAM, 78 Safety Symbols, 10 Standard Cleaning Equipment, 67 Straight contact connectors, 20 Switching Time, 52 Keysight N77xx Series Optical Switch...
  • Page 84 Index Ultrasonic baths, 70 Technical Specifications - Optical Wavelength range, 53 Switches, 54 USB Interface, 7 Temperature for operation and storage, 16 Keysight N77xx Series Optical Switch...
  • Page 86 This information is subject to change without notice. © Keysight Technologies 2015 Edition 2.0, January 2015 www.keysight.com...

This manual is also suitable for:

N7731aN7734a

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