Table of Contents
Related Manuals for Keysight N7744A
Summary of Contents for Keysight N7744A
- Page 1 Keysight N774x Series N7744A 4-Channel Optical Multiport Power Meter (LXI) N7745A 8-Channel Optical Multiport Power Meter (LXI) N7747A 2-Channel High Sensitivity Optical Power Meter N7748A 4-Channel High Sensitivity Optical Power Meter User’s Guide...
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Page 3: Safety Notices
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 4: Table Of Contents
Contents Getting Started Overview Keysight N7744A and N7745A Optical Power Meter Keysight N7747A and N7748A Optical Power Meter Initial Inspection Safety Considerations Safety Considerations - Overview Safety Symbols General Operating Environment Line Power Requirements Input/Output Signals Line Power Connectors Instrument Markings... - Page 5 Making Optical Connections Making Optical Connections Making Quad-adapter Connections on the Keysight N7744/45A Multiport Power Meter Electrical Connectors LAN Interface LAN Interface Selecting a LAN Network Private LAN Considerations Security Performance Reliability IP Address Availability Site LAN Considerations Connecting the LAN Cable...
- Page 6 Definition of Terms Literature Technical Specifications - Keysight N7744A and N7745A Technical Specifications - Keysight N7747A and N7748A Declaration of Conformity - Keysight N7744A and N7745A 75 Declaration of Conformity - Keysight N7747A and N7748A 76 Regulations Information EMC Canada...
- Page 7 Keysight E-mail Updates 79 Keysight Direct Keysight Open www.keysight.com Accessories Accessories - Overview Instrument and Options - Keysight N7744A and N7745A 81 Instrument and Options - Keysight N7747A and N7748A 83 Cables Maintenance and Troubleshooting Maintenance and Troubleshooting - Overview Cleaning Instructions...
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Page 8: Overview
Getting Started Overview This chapter helps you start using your N77-Series instrument. • “Keysight N7744A and N7745A Optical Power Meter” on page 8 • “Keysight N7747A and N7748A Optical Power Meter” on page 8 • “Initial Inspection” on page 9 •... -
Page 9: Keysight N7744A And N7745A Optical Power Meter
Getting Started Keysight N7744A and N7745A Optical Power Meter The Keysight N7744A and Keysight N7745A are LXI compliant optical power meters with 4 or 8 power-sensor ports respectively. They address productivity challenges by increasing throughput and operational efficiency using industry-leading device connectivity, high-speed acquisition of measurement data and fast data transfer for post- processing. -
Page 10: Initial Inspection
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 11: Safety Symbols
The warning sign denotes a hazard. It calls attention to a procedure which, if not W A R N I N G correctly performed or adhered to, could result in injury or loss of life. Do not proceed beyond a warning sign until the indicated conditions are fully understood and met. Keysight N774x Series... -
Page 12: General
AC power source that supplies between 100 V and 240 V at a frequency in the range 50 to 60 Hz. The maximum voltage fluctuation is 10% of the nominal supply voltage. The maximum power consumption is 60 VA with all options installed. Keysight N774x Series... -
Page 13: Input/Output Signals
• 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. -
Page 14: Instrument Markings
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 http://about.keysight.com/en/ companyinfo/environment/ takeback.shtml for more information. The KC mark is the Korean certification mark. -
Page 15: Line Power Requirements
If the instrument is in a cabinet, it must be disconnected from the line power by the system’s line power switch. The power switch allows you to switch between stand-by mode and power-on mode. Figure 1 Power Switch Keysight N774x Series... -
Page 16: 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 17: Operating And Storage Environment
The operating temperature is from 5°C to +40°C. The storage temperature is from -40°C to +70°C. Humidity The operating humidity is 15 to 95%, non-condensing. Altitude The maximum operating altitude is 2000 m. Pollution Protection The instruments are designed for pollution degree 2. Keysight N774x Series... -
Page 18: Instrument Cooling
The instrument should not be operated when resting on its rear or side panels. Figure 3 Correct Operating Position (shown here for the Keysight N7744/5A, valid also for the N7747/48A, N7751/2A, Keysight N7761/2/4A, N7766/68A, N773xA and the N7711/4A) Keysight N774x Series... -
Page 19: Input And Output Connectors
Front Panels - Multiport Power Meters • Rear Panel Front Panels - Multiport Power Meters Figure 4 Front panel of the Keysight N7744A 4-Channel Optical Multiport Power Meter Figure 5 Front panel of the Keysight N7745A 8-Channel Optical Multiport Power Meter... -
Page 20: Rear Panel
Getting Started Figure 6 Front panel of the Keysight N7747A 2-Channel Optical Power Meter Figure 7 Front panel of the Keysight N7748A 4-Channel Optical Power Meter Rear Panel Figure 8 Rear panel of the Keysight N77xx Series instruments Keysight N774x Series... -
Page 21: Making Optical Connections
The N774xA power meters do not make contact to the fiber connector faces and can be used with either angled or straight connectors. The N7744A and N7745A use the quad-adapters described below. The N7747A and N7748A use the interchangeable 81000xI connector interfaces, selected for the desire connector type. -
Page 22: Making Quad-Adapter Connections On The Keysight N7744/45A Multiport Power Meter
Getting Started Making Quad-adapter Connections on the Keysight N7744/45A Multiport Power Meter Figure 9 Connecting Optical Fibers Before you attach a quad-adapter or fiber, you should make sure they are clean. N O T E This is important for accurate measurements. -
Page 23: Electrical Connectors
Getting Started Removing Quad-adapter Interfaces from the Keysight N7744/5A Multiport Power Meter There are release levers on both sides of the quad-adapter for removing it from the N O T E optical inputs. Figure 10 Removing Quad-adapter Interfaces 1 Press the release levers on both sides of the quad-adapter to release it from the front panel of the power meter. -
Page 24: Lan Interface
(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 N774x Series... -
Page 25: 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 N774x Series... -
Page 26: 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 N774x Series... - Page 27 LXI device identification proceeds you will see the following indicators: Figure 13 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 N774x Series...
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Page 28: 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 29: Connector
Connector Part Number: 1251-0293 Figure 14 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 30: 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 31: Front Panel Indicators
Meter, an 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 N774x Series... - Page 32 Getting Started Figure 17 Keysight Connection Expert software 2 Attach the instrument to the USB. The first time 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.
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Page 33: Finding The Ip Address Of An Instrument
1 Connect to the instrument over USB, as described above. 2 Select the instrument in the list. Figure 19 Select the instrument 3 Click on “Send commands to this instrument”. The default command is the *IDN? query. Figure 20 *IDN? query 4 Enter the command :SYSTem:COMMunicate:ETHernet:IPADdress:CURRent? Keysight N774x Series... -
Page 34: Connecting Over Lan
LED on the front panel is green. See, “LAN Interface” on page 23 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 N774x Series... - Page 35 4 Click on “Add an instrument” in the Task Guide. 5 Wait for the scan to finish. 6 Select the instrument in the list. Figure 23 7 To show the description of the instrument, check the box for *IDN? query and click on "Find Again". Keysight N774x Series...
- Page 36 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 N774x Series...
- Page 37 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 4.4.2 or higher. You can also use the IVI-COM driver for the N7744A and N7745A Multiport power meters. Keysight N774x Series...
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Page 38: 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 39: N77Xx Viewer Common User Interface Functions
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 connect from the list. Figure 26 Connecting to an Instrument Keysight N774x Series... - Page 40 3 The list shows instruments that have been given a VISA address. If your instrument is not in the list, 1 Use the Keysight Connection Expert to check your instrument has a VISA address 2 Click on the “Scan Again” button.
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Page 41: Viewing Measurements And Settings
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 28 Viewing the measurement on a single channel attenuator/power meter (left) or tunable laser (right) Keysight N774x Series... -
Page 42: 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. Figure 30 Saving a configuration 3 Click on the “OK” button. Keysight N774x Series... -
Page 43: Controlling The Instrument Refresh
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 N774x Series... -
Page 44: Power Measurement
LAN / USB / GPIB: 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. For the Keysight N7744A/N7745A Optical Multiport Power Meter, you can also use the associated IVI-COM drivers. - Page 45 Power Measurement Figure 32 The Welcome Page Select the “Browser Web Control” tab on the left. Figure 33 The Browser Web Control Keysight N774x Series...
- Page 46 Measurement Settings buffers. These let you save and recall sets of settings with single programming commands. For further details, refer to “Handling Measurement Settings - The :CONFigure:MEASurement:SETTing subtree“ in the Programming Guide. Figure 34 Settings of the Optical Multiport Power Meter Keysight N774x Series...
- Page 47 The most convenient way to control one or more Multiport Power Meters is using the N77xx Viewer, which is a control and display graphical user interface. Figure 35 The N77xx Viewer The Viewer is available to download from the product webpage which you can access at Keysight N774x Series...
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Page 48: How To Measure Power
For each port, the optical power is measured and returned or displayed. The power reading represents the average optical power over the selected averaging time. The power meter can continuously self-trigger new measurements or be configured to wait for external software or hardware triggers. Keysight N774x Series... -
Page 49: How To Set The Power Unit
For information on selecting this reference value, see How to Input a Reference Level. The following calculation is made: Where, is the power value returned in dB, is the input signal level in Watts, and input Keysight N774x Series... -
Page 50: How To Set The Calibration Offset
(dBm) - REF(dBm) measured where, is the returned relative power, is the absolute power level (see “How to Set the Calibration measured Offset” on page 49), and REF is the reference level. Keysight N774x Series... - Page 51 49) measured by the current port, and is the absolute power level (see “How to Set the Calibration measuredB Offset” on page 49) measured by the port you choose to reference, and REF is the reference level in decibels (dB). Keysight N774x Series...
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Page 52: How To Set The Wavelength
It is good practice to perform a zero before making any sensitive measurements. Logging data over a wide dynamic range is a typical case that requires a valid zero setting. 1 In the File menu, select Zeroing. Keysight N774x Series... - Page 53 When zeroing is finished, the traffic light is green. You can now proceed with your measurements. When environmental conditions are stable, the zero setting will remain valid over long times and the same settings will be active after rebooting the instrument. Keysight N774x Series...
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Page 54: How To Choose The Range Mode
Upper Power Limits for Various Power Ranges [RANGE] Upper Power Limit 10 dBm 10.000 mW 10.000 dBm 0 dBm 1.9999 mW 3.000 dBm -10 dBm 199.99 µW -7.000 dBm -20 dBm 19.999 µW -17.000 dBm -30 dBm 1.9999 µW -27.000 dBm Keysight N774x Series... -
Page 55: How To Set The Averaging Time
Longer averaging times increase the accuracy and improve the noise rejection. The averaging time of the N7744A and N7745A can be set over a wide range from 1 µs to 10s. Up to 2 ms, the setting can be varied with a typical resolution of 2 µs, and for higher averaging times the setting resolution... -
Page 56: How To Choose The Minmax Mode
N samples have been compared. After N samples the minimum and maximum values are reset and a new MinMax measurement begins. You can use Refresh mode, for example, when you are searching for or setting the position of minimum PDL. Keysight N774x Series... -
Page 57: How To Use External Triggers
How to Use External Triggers The Optical Multiport Power Meter lets you trigger the instrument to perform tasks and to output trigger signals to external measurement instruments using the rear panel BNC connectors. 1 In the File menu, select Trigger. Keysight N774x Series... - Page 58 <Single Measurement> The trigger causes a single power measurement to be made. • <Complete Measurement> The trigger will cause an active measurement function like logging to begin and continue until completed. 4 Set the output trigger functions Keysight N774x Series...
- Page 59 <Meas. started> An output trigger is generated when a power measurement begins. • <Avg Time Over> An inverted trigger is generated for each measurement sample. For further information on triggering, please refer to the Keysight N77xx-Series Programming Guide, in the chapter “Triggering - The TRIGger Subsystem”. Keysight N774x Series...
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Page 60: Power Meter Applications
Keysight N774x Series User's Guide Power Meter Applications Power Meter Applications This chapter explains how to set up and perform the following applications using the N7744/5/7/8A Optical Multiport Power Meter. • The Logging application logs power measurements. The Logging application performs measurements consecutively without the possibility of any pause between measurements. -
Page 61: Continuous Logging Using Data Buffers
When LOOP = 1, default logging behavior is selected, that is measurements are made and the results are written to the first buffer. • If LOOP = 0, logging continues, writing the results into alternate buffers, until you stop it. Keysight N774x Series... -
Page 62: The Stability Application
The averaging time is less than the period time, there is a dwell time between the commencement of each power measurement, as shown in the figure, above. • The averaging time is equal to the period time, all power measuremant are performed without any dwell time. Keysight N774x Series... - Page 63 The total time concludes after the last dwell time period, not after the last averaging N O T E time period. The Stability application enables you to make periodic power measurements over a long time (277 hours (11 days and 13 hours)). Keysight N774x Series...
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Page 64: Specifications And Regulations Compliance
Keysight N774x Series User's Guide Specifications and Regulations Compliance Definition of Terms (Applicable) fiber type Connection type for which the specifications and characteristics apply (if not differently stated). Averaging time Specifies the period during which the power meter or monitor power meter takes readings from the photodetector. - Page 65 Specifications and Regulations Compliance uses 3rd-order for the N7744A and N7745A and 1st-order for the N7747A and N7748A. The Drift D is calculated by D = max } or mini{F }, whichever is worse. Figure 43 Drift (dark) Conditions: All ports dark. Observation time as specified. Other conditions as specified.
- Page 66 Specifies the peak-to-peak (pp) change of displayed power over time with zero input power (dark), excluding "Drift (dark)" (see, “Drift (dark)” on page 63) for the N7744A and the N7745A only. Powers expressed in Watts. Conditions: All ports dark. Averaging time as specified. Other conditions as specified.
- Page 67 The instrument must not be operated outside this range. If previously stored beyond this range, wait for acclimation before turning on the instrument. Operating temperature and humidity The ambient temperature range and humidity range of the tunable laser source for which the specifications apply. Keysight N774x Series...
- Page 68 D (positive or negative) on any other port without chng applied power (dark). Excluding "Noise pp (dark)" (see, “Noise pp (dark)” on page 65) and "Drift (dark)" (see, “Drift (dark)” on page 63). Keysight N774x Series...
- Page 69 Relative port to port uncertainty Specifies ± half the maximum difference between the measured powers of different ports when applying the same stimulus. Measured powers expressed in dBm, the relative port to port uncertainty U expressed in ±dB. Keysight N774x Series...
- Page 70 Spectral ripple is defined as ± half the difference between the highest and the lowest power resulting from the periodic change. Conditions: Constant input power, constant state of polarization (SOP). Connector as specified. Other conditions as specified. Keysight N774x Series...
- Page 71 U = 100% * (M/P - 1) Conditions: Reference conditions as specified. Wavelength range The range of wavelengths for which the power meter is calibrated, or that can be set at the attenuator and for which the specifications apply (if not differently stated). Keysight N774x Series...
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Page 72: Literature
Specifications and Regulations Compliance Warm-up time Time after power-up of the acclimated instrument after which the specifications and characteristics apply. Literature Fiber Optic Test and Measurement, Hewlett Packard Professional Books, edited by Prentice Hall, ISBN 0-13-534330-5 Keysight N774x Series... -
Page 73: Technical Specifications - Keysight N7744A And N7745A
Specifications and Regulations Compliance Technical Specifications - Keysight N7744A and N7745A Keysight N774x Series... - Page 74 Specifications and Regulations Compliance Keysight N774x Series...
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Page 75: Technical Specifications - Keysight N7747A And N7748A
Specifications and Regulations Compliance Technical Specifications - Keysight N7747A and N7748A Keysight N774x Series... - Page 76 Specifications and Regulations Compliance General Characteristics Keysight N774x Series...
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Page 77: Declaration Of Conformity - Keysight N7744A And N7745A
Specifications and Regulations Compliance Declaration of Conformity - Keysight N7744A and N7745A The latest version of the Declaration of Conformity can be found here http://www.keysight.com/go/conformity Keysight N774x Series... -
Page 78: Declaration Of Conformity - Keysight N7747A And N7748A
Specifications and Regulations Compliance Declaration of Conformity - Keysight N7747A and N7748A The latest version of the Declaration of Conformity can be found here http://www.keysight.com/go/conformity Keysight N774x Series... -
Page 79: Regulations Information
< 70 dB(A), normal operation, operator position. Certification Certification Keysight Technologies Inc. certifies that this product met its published specifications at the time of shipment from the factory. Keysight Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, NIST to the extent allowed by the Institutes’s calibration... -
Page 80: Remove All Doubt
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 81: Keysight Open
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 www.keysight.com For more information on Keysight Technologies products, applications and services, please contact your local Keysight office. -
Page 82: 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 accessories. Instrument and Options - Keysight N7744A and N7745A Table 4 N7744A, N7745A ordering options N7744A... - Page 83 Bare Fibre Holder Set for 400-900 µm Fibres (4 each with gauge) N7744A-100 Rack Mount Kit for one or two Multiport Power Meter Units N7744A-100 does not mount two units of different depth. N O T E Service and Repair R-50C-011-3 Keysight calibration up-front...
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Page 84: Instrument And Options - Keysight N7747A And N7748A
Accessories Instrument and Options - Keysight N7747A and N7748A Table 6 N7747A, N7748A ordering options N7747A Optical High Performance Power Meter (2 channel) N7748A Optical High Performance Power Meter (4 channel) includes: USB and cross-over LAN cable Accessories 81000FI FC Connector Interface... -
Page 85: Cables
For LC and MU connectors, use of the 8162x optical power heads or the N7744A and N7745A power meters with corresponding adapters is recommended for highest accuracy. Ferrules with conical or raised-end faces also add positioning uncertainty and are not recommended for use with the N7747A or N7748A. -
Page 86: 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 87: Safety Precautions
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 N774x Series... -
Page 88: What Do I Need For Proper Cleaning
• 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 89 Maintenance and Troubleshooting If you need further dust caps, please contact your nearest Keysight Technologies sales office. 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).
- Page 90 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 N774x Series...
- Page 91 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 N774x Series...
- Page 92 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 N774x Series...
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Page 93: Preserving Connectors
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 94: Which Cleaning Procedure Should I Use
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 N774x Series... - Page 95 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 N774x Series...
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Page 96: How To Clean Connector 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. Keysight N774x Series... -
Page 97: How To Clean Optical Glass Plates
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 N774x Series... -
Page 98: Other Cleaning Hints
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 99: Error Messages
Memory Inventory The instruments have the following memory size: EEPROM 2 Mb for N7744A and N7747A. 3 Mb for N7745A and N7748A. This memory does not contain any customer data. Flash ROM 16 MB. This memory can contain calibration data, and so on, as well as user parameter settings, zeroing data and logged information (the log contains limited operational information). -
Page 100: Clearing User Data
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 N774x Series... - Page 101 Maintenance and Troubleshooting Keysight N774x Series...
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Page 102: Index
Line Power Requirements, 11 Adapters, 27 Linearity, 65 Additional Cleaning Equipment, 87 Keysight N7745A, 7 Keysight N7748A, 7 Keysight N7744A, 7, 8 EEPROM, 98 Keysight N7745A, 8 Electrical Connectors, 7, 22 Maximum safe (input) power, 65 Keysight N7747A, 7 Electrical offset, 51... - Page 103 Temperature for operation and ranging modes, 53 storage, 16 Rear Panel, 19 Total uncertainty, 70 Recalling a configuration, 42 Trigger, 56 Relative port to port uncertainty, 68 Zeroing, 51 Return loss, 69 Ultrasonic baths, 90 Safety, 9 Keysight N774x Series...
- Page 105 This information is subject to change without notice. © Keysight Technologies 2017 Edition 7.0, October 2017 www.keysight.com...