background image

These are well supported by the 1x13 switch configuration and the 13th
path can often be used as a permanent reference path.

Signals in multimode fibers are distributed over a range of mode groups

 

that can have different loss and delay in a link. 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.

Initial Inspection

Inspect the shipping container for damage. If there is damage to the

 

container or cushioning, keep them until you have checked the contents

 

of the shipment for completeness and verified the instrument both

 

mechanically and electrically. The Function Tests give a procedure for

 

checking the operation of the instrument. If the contents are incomplete,

 

mechanical damage or defect is apparent, or if an instrument does not

 

pass the operator’s checks, notify the nearest 

Keysight

 Technologies

 

Sales/Service Office.

N O T E

To avoid hazardous electrical shock, do not perform electrical tests when there are
signs of shipping damage to any portion of the outer enclosure (covers, panels, and
so on).

Claims and Repackaging

If physical damage is evident or if the instrument does not meet

 

specification when received, notify the carrier and the nearest 

Keysight 

Technologies Sales/Service Office. The 

Keysight

 Technologies 

Sales/Service Office will arrange for repair or replacement of the unit 
without

 

waiting for settlement of the claim against the carrier.

Getting Started

 

1

Keysight

 N77xx Series 

11

Summary of Contents for N77 Series

Page 1: ...Getting Started Guide Keysight N77xx Series ...

Page 2: ......

Page 3: ...GHT 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 SHALL CONTROL Technology Licenses The hardware 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 Restricted Rights ...

Page 4: ...and Repackaging 11 Return Shipments to Keysight Technologies 12 Safety Considerations 13 Safety Considerations Overview 13 Safety Symbols 13 General 14 Operating Environment 15 Line Power Requirements 15 Initial Safety Information for Tunable Laser Modules 15 Laser Safety Labels 16 Input Output Signals 17 Line Power Connectors 17 Instrument Markings 18 AC Line Power Supply Requirements 19 AC Line ...

Page 5: ...ical Connections 28 Making Optical Connections 28 Making Quad adapter Connections on the Keysight N7744 45A Multiport Power Meter 30 Optical Output 31 Electrical Connectors 32 LAN Interface 33 LAN Interface 33 Selecting a LAN Network 33 Private LAN Considerations 33 Security 33 Performance 34 Reliability 34 IP Address Availability 34 Site LAN Considerations 34 Connecting the LAN Cable 35 GPIB Inte...

Page 6: ...he IP Address of an instrument 42 Connecting over LAN 43 N77xx Viewer Common User Interface Functions 47 Software Installation 47 Connecting to an Instrument 47 Viewing Measurements and Settings 50 Saving and Recalling Configurations 51 Controlling the Instrument Refresh 52 Index 53 Keysight N77xx Series 5 ...

Page 7: ...6 Keysight N77xx Series ...

Page 8: ...t consists of a quadruple adapter quad adapter with a quick locking mechanism Up to four fiber connectors from the device under test DUT can be connected in a comfortable working position to one quad adapter The push on locking mechanism makes it easy and secure to attach the quad adapter to and remove the quad adapter from the instrument in seconds With multiple quad adapters the measurement task...

Page 9: ...or convenient power measurements and setup calibration The Keysight N7761A Keysight N7762A and Keysight N7764A are single mode fiber optical attenuators for single mode fiber with one two and four attenuator channels respectively All N775xA and N776xA attenuators address productivity challenges by increasing throughput and operational efficiency The Keysight N7766A and the Keysight N7768A are opti...

Page 10: ...timode attenuators are designed to assure homogeneous attenuation of all input modes Keysight N7711 4A Single and 4 Port Tunable Laser System Source The Keysight N7711A and N7714A tunable lasers are single port and four port sources available with C band or L band wavelength coverage The narrow linewidth and offset grid fine tuning capability of the N7711A and N7714A make them ideal sources for re...

Page 11: ... interfacing support high performance automated setups The multimode switch has excellent mode fidelity These instruments are used for automatic routing of optical signals for testing devices like transceivers amplifiers and passive components Optical switches optimize the investment in automated test equipment by improving repeatability and throughput and supporting parallel measurements of multi...

Page 12: ...ipment for completeness and verified the instrument both mechanically and electrically The Function Tests give a procedure for checking the operation of the instrument If the contents are incomplete mechanical damage or defect is apparent or if an instrument does not pass the operator s checks notify the nearest Keysight Technologies Sales Service Office N O T E To avoid hazardous electrical shock...

Page 13: ... A double wall carton made of 350 pound test material is adequate Use enough shock absorbing material 3 to 4 inch layer around all sides of the instrument to provide a firm cushion and prevent movement inside container Protect control panel with cardboard Seal shipping container securely Mark shipping container FRAGILE to encourage careful handling In any correspondence refer to instrument by mode...

Page 14: ...ation contains information and warnings that must be followed by the user to ensure safe operation and to maintain the product in a safe condition Safety Symbols C A U T I O N The caution sign denotes a hazard It calls attention to a procedure which if not correctly performed or adhered to could result in damage to or destruction of the product Do not proceed beyond a caution sign until the indica...

Page 15: ...ondition Some circuits are powered whenever the instrument is connected to the AC power source To disconnect from the line power disconnect the power cord either at the rear power inlet or at the AC line power source receptacle One of these must always be accessible If the instrument is in a cabinet it must be disconnected from the line power by the system s line power switch W A R N I N G To avoi...

Page 16: ...of the nominal supplyvoltage Themaximumpowerconsumptionis60VAwithalloptionsinstalled Initial Safety Information for Tunable Laser Modules The laser sources specified by this user guide are classified according to IEC 60825 1 2007 The laser sources comply with 21 CFR 1040 10 except for deviations pursuant to Laser Notice No 50 dated 2007 June 24 Table 2 Keysight N7711A N7714A Keysight N7711A N7714A...

Page 17: ...issible CW output power is the highest optical power that is permitted within the appropriate laser class Laser Safety Labels Laser class 1M label Figure 2 Class 1M Safety Label N7711 14A N7721 22A A sheet of laser safety labelsis included with the laser module as required In order to meet the requirements of IEC 60825 1 we recommend that you stick the laser safety labels in your language onto a s...

Page 18: ...qualified and authorized personnel Input Output Signals C A U T I O N There is one input BNC connector Trigger In This is a TTL input A maximum of 5 V can be applied as an external voltage to this input connector There is one output BNC connector Trigger Out This is a TTL output Do not apply an external voltage to this connector The N7747A and N7748A have front panel BNC connectors for each optica...

Page 19: ...operative and secured against unintended operation until they can be repaired by qualified service personnel Defective damaged or malfunctioning laser sources must be returned to an Keysight Technologies Service Center Do not operate the instrument in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment constitutes a definite safety hazard Instrume...

Page 20: ...ument complies with installation category II and can operate from the single phase AC power source that supplies between 100 V and 240 V at a frequency in the range 50 60 Hz The maximum voltage fluctuation is 10 of the nominal supply voltage The maximum power consumption is 60 VA with all options installed Line Power Cable In accordance with international safety standards the instrument has a thre...

Page 21: ...power switch allows you to switch between stand by mode and power on mode Figure 3 Power Switch When the instrument is in stand by mode the Pwr LED is orange When the instrument is powered on the Pwr LED is green W A R N I N G To avoid the possibility of injury or death you must observe the following precautions before switching on the instrument Insertthepowercableplugonlyintoasocketoutletprovide...

Page 22: ...izes the operating environment ranges In order for the instrument to meet specifications the operating environment must be within these limits W A R N I N G The instrument is not designed for outdoor use To prevent potential fire or shock hazard do not expose the instrument to rain or other excessive moisture Temperature The instrument should be protected from temperature extremes and changes in t...

Page 23: ... horizontally as shown in Figure 4 so that air can circulate through it freely Operating Position When operating the instrument choose a location that provides at least 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 shoul...

Page 24: ...2 4A N7766 68A N773xA and the N7711 4A Input and Output Connectors Input and Output Connectors Overview This section provides information on Front Panels Multiport Power Meters Front Panels Optical Attenuators Front Panels Tunable Laser Source Front Panels Optical Switches Rear Panel Getting Started 1 Keysight N77xx Series 23 ...

Page 25: ...l Multiport Power Meter Figure 7 Front panel of the Keysight N7745A 8 Channel Optical Multiport Power Meter Figure 8 Front panel of the Keysight N7747A 2 Channel Optical Power Meter Figure 9 Front panel of the Keysight N7748A 4 Channel Optical Power Meter 1 Getting Started 24 Keysight N77xx Series ...

Page 26: ...nnel Power Meter Figure 11 Front panel of the Keysight N7752A 2 Channel Optical Attenuator and 2 Channel Power Meter Figure 12 Front panel of the Keysight N7761A 1 Channel Optical Attenuator Figure 13 Front panel of the Keysight N7762A and N7766A 2 Channel Optical Attenuator Getting Started 1 Keysight N77xx Series 25 ...

Page 27: ... Optical Attenuator Front Panels Tunable Laser Source Figure 15 Front panel of the Keysight N7711A Single Port Tunable Laser System Source Figure 16 Front panel of the Keysight N7714A Single Port Tunable Laser System Source 1 Getting Started 26 Keysight N77xx Series ...

Page 28: ...panel of the Keysight N7731A 2 Channel 1x4 Optical Switch Figure 18 Front panel of the Keysight N7734A 1 Channel 1x13 Optical Switch Rear Panel Figure 19 Rear panel of the Keysight N77xx Series instruments Getting Started 1 Keysight N77xx Series 27 ...

Page 29: ...or interfaces The fiber option determines the dimensions of the internal fiber core such as 50 or 62 5µm Best performance is achieved by matching this to the fibers used in the setup The option 062 multimode switches have straight FC PC connector interfaces The dimensions of the internal fiber core is 62 5 µm The switches may also be used with good results together with 50 µm core fiber because th...

Page 30: ...7748A use the interchangeable 81000xI connector interfaces selected for the desire connector type Common choices are the 81000FI for FC connectors 81000KI for SC connectors and 81002LI for LC connectors The 81000BI can be used for bare fiber connections C A U T I O N When using bare fiber connections to power meters the length of fiber extending from the fiber holder must be carefully adjusted to ...

Page 31: ...air For further information refer to Maintenance and Troubleshooting section described in this manual To use a quad adapter to connect optical fibers to the power meter inputs 1 Select the quad adapter that suits the optical connector that your optical fiber is terminated with 2 Attach the optical connectors to the quad adapter You can attach up to 4 fibers to the quad adapter at the same time 3 M...

Page 32: ...Always place the dust cap on unused connector interfaces You can use the quad adapter dust caps to protect the four power meter inputs and the rear of the quad adapter for example when fibers are attached Optical Output Polarization Maintaining Fiber A Polarization maintaining fiber PMF output is standard for Keysight N7711 4A tunable laser system sources PMF is aligned to maintain the state of po...

Page 33: ...wer in mW The voltage is in the range 0 2 V and 1 V corresponds to the value of the currently selected power range For example when using the 10 dBm range a 100 µW optical power will give 1 V analog output C A U T I O N The Trigger In is a TTL input A maximum of 5 V can be applied as an external voltage to this input connector The Trigger Output is a TTL output Do not apply an external voltage to ...

Page 34: ...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 Security A private network generally involves a direct connection between the computer and the instrument or to multiple instruments using ...

Page 35: ...ry instrument node on a LAN private or site has an IP Internet Protocol address Due to the expanding use of the internet the number of site network 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 ad...

Page 36: ...instrument is connected directly to the PC use a LAN crossover cable as provided with the instrument If your computer supports Auto MDIX or contains a LAN card with gigabit data transfer rates the blue crossover cable is not required 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 cro...

Page 37: ...e used The LAN LED As the LAN connection is made the DHCP server assigns an address and the LXI device identification proceeds you will see the following indicators Figure 26 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 is no DHCP server for example when the instrument is connected directly to a...

Page 38: ...he following sequence of programming commands SYSTem COMMunicate ETHernet RESet GPIB Interface GPIB Interface You can connect your GPIB interface into a star network a linear network or a combination star and linear network The limitations imposed on this network are as follows The total cable length cannot exceed 20 meters The maximum cable length between devices is 4 meters with an average separ...

Page 39: ...C that have a shiny nickel finish C A U T I O N It is recommended that you do not stack more than three connectors one on top of the other Hand tighten the connector lock screws Do not use a screwdriver GPIB Logic Levels The instrument s GPIB lines use standard TTL logic as follows True Low digital ground or 0 Vdc to 0 4 Vdc False High open or 2 5 Vdc to 5 Vdc All GPIB lines have LOW assertion sta...

Page 40: ...ore connecting the instrument over USB install the Keysight I O Libraries Suite which is included on a CD with the instrument The instrument is a USB device with a mini USB connector Powering Up the Instrument Powering Up the Instrument When you switch on the instrument the LEDs on the front panel show the various stages of booting Figure 28 Powering Up the Instrument Getting Started 1 Keysight N7...

Page 41: ...eysight I O libraries available on the CD supplied with the instrument or from www Keysight com Connecting over USB N O T E The screenshots show the Keysight N7745A Multiport Power Meter The same procedure applies when connecting an Keysight N7744 7 8A Multiport Power Meter an Keysight N7751 2A Optical Attenuator and Power Meter or an Keysight N7761 2 4 6 8A Optical Attenuator or an Keysight N7711...

Page 42: ...e you attach the instrument follow the instructions on the screen to select the driver for this instrument When the instrument is connected it is shown in the list Figure 31 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 Getting Started 1 Keysight N77xx Series 41 ...

Page 43: ...bed above 2 Select the instrument in the list Figure 32 Select the instrument 3 Click on Send commands to this instrument The default command is the IDN query Figure 33 IDN query 4 Enter the command SYSTem COMMunicate ETHernet IPADdress CURRent 1 Getting Started 42 Keysight N77xx Series ...

Page 44: ...rocedure applies when connecting to other N77xx instruments like attenuators switches and laser sources 1 Make sure the instrument is connected to the LAN and that the LAN LED on the front panel is green See LAN Interface on page 33 for 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 Getting Starte...

Page 45: ...ent in the Task Guide 5 Wait for the scan to finish 6 Select the instrument in the list Figure 36 7 To show the description of the instrument check the box for IDN query and click on Find Again 1 Getting Started 44 Keysight N77xx Series ...

Page 46: ... 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 Getting Started 1 Keysight N77xx Series 45 ...

Page 47: ...sing the N77xx Viewer is described in Connecting to the Instrument Overview on page 40 More advanced functionality is available through programming with SCPI commands described in the Programming Guide available on the CD supplied with the instrument or from www Keysight com or using the 816x VXI Plug Play driver version 4 4 or higher You can also use the IVI COM driver for the N7744A and N7745A M...

Page 48: ...le 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 Connecting to an Instrument When you first launch the N77xx Viewer it is not connected to any of your instruments 1 Click on the Connect icon at the top right of the window 2 Select the instrument to which you want to con...

Page 49: ...our instrument has a VISA address 2 Click on the Scan Again button Once communication has been established to the instrument its details are shown 4 If you need to change the connection configuration for an instrument on the LAN click on the Configure Interfaces button You can only configure the LAN parameters before the instrument is connected 1 Getting Started 48 Keysight N77xx Series ...

Page 50: ...lected You can now edit the IP parameters 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 Getting Started 1 Keysight N77xx Series 49 ...

Page 51: ...for simply viewing the settings and readings as follows Viewing the measurement on a single channel 1 Click on the New button to open a window with the current measurement and parameter settings Figure 41 Viewing the measurement on a single channel attenuator power meter left or tunable laser right Viewing all channels 1 Click on Overview to open a window with the measurements on all channels 1 Ge...

Page 52: ...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 Figure 43 Saving a configuration 3 Click on the OK button Recalling a configuration 1 In the File menu select Load 2 Enter or select the setting you want to retrieve Getting Started 1 Keysight N77xx Series 51 ...

Page 53: ...heck in the box for Update enabled the display is not updated with the replies to queries sent to the instrument Set the update interval for Readings to control how often the result is read from the instrument and the display updated Set the update interval for Polled Values to control how often the measurement parameters are read from the instrument and the display updated This is useful if for e...

Page 54: ...ches 27 Front Panels Tunable Laser Source 26 G GPIB interface 37 GPIB Logic Levels 38 I Input Output Signals 17 Instrument Markings 18 IP address 33 L Laser class 1M label 16 laser safety labels 16 Line Power Cable 19 Line Power Connectors 17 Line Power Requirements 15 M Multimode attenuators 28 N N7747A 8 N7748A 8 O Operating Environment 15 Optical connectors 28 Optical attenuators 28 P Power Met...

Page 55: ...V Viewing Measurements and Settings 50 Index 54 Keysight N77xx Series ...

Page 56: ......

Page 57: ...This information is subject to change without notice Keysight Technologies 2019 Edition 7 1 January 2019 www keysight com ...

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