Agilent Technologies N4373A User Manual

Lightwave component analyzer
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Summary of Contents for Agilent Technologies N4373A

  • 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 Agilent N4373A Lightwave Component Analyzer User’s Guide Agilent Technologies...
  • Page 3 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 4 No other warranty is expressed or implied. Agilent Technologies specifically disclaims Agilent Technologies shall not be liable for Agilent Technologies, Deutschland GmbH the implied warranties of Merchantability errors contained herein or for incidental or Herrenberger Straße 130...
  • Page 5 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 6: Table Of Contents

    ............37 Description of the Agilent N4373A Lightwave Component Analyzer .
  • Page 7 PNA..........75 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 8 ................119 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 9 ................132 Agilent N4373A Lightwave Component Analyzer Performance Test .
  • Page 10 Optical Test Set Front and Rear Panels....20 Performance Verification on the PNA....26 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 11: Getting Started

    Getting Started Introduction The Agilent N4373A Lightwave Component Analyzer (LCA) is designed for characterizing the magnitude and phase transfer functions of electrical, opto-electrical, electro-optical and optical components. Apart from classical RF components, this includes RF PIN diodes, transceivers, lasers, electro-optical modulators and optical filters.
  • Page 12: General Safety Considerations

    Do not proceed beyond a warning sign until the indicated conditions are fully understood and met. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 13 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. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 14 Failure to ensure adequate earth grounding by not using this cord may cause instrument damage. This instrument has autoranging line voltage input. Be sure the CAU T ION supply voltage is within the specified range. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 15 163mW power Numerical aperture Beam waist diameter < 10µm < 10µm CW output power is defined as the highest possible optical output power that the laser source can produce at the output connector Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 16: Line Power Requirements

    • Refer servicing only to qualified and authorized personnel. Line power requirements The Agilent N4373A Lightwave Component Analyzer complies with CAU T ION overvoltage 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 to 60 Hz.The maximum power consumption is 50 VA...
  • Page 17 Agilent 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. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 18 Directive Annex 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 Agilent office, or see www.agilent.com/environment/product/ for more information. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 19: Analyzer

    If anything is missing or defective, contact your nearest Agilent Technologies sales office. If the shipment was damaged, contact the carrier, then contact the nearest Agilent Technologies sales office. Before you connect any fiber-optic cable to the Lightwave CAU T ION Component Analyzer, please ensure it has been properly cleaned.
  • Page 20 See “Making a backup of the LCA files” on page 99 if you are using an ENA, or “Making a backup of the LCA files” on page 100 if you are using a PNA for information on the files to backup. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 21: Optical Test Set Front And Rear Panels

    Getting Started Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 22 Getting Started Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 23: Using The Correct Connectors

    Getting Started Using the correct connectors The Agilent N4373A Lightwave Component Analyzer is equipped with an straight contact optical output connector as standard (option - 021). Angled contact connectors are available as option - 022. Angled contact connectors help you to control return loss.
  • Page 24: Performance Verification On The Ena

    Select [Load & Run]. c Select LCASYSTEM. 7 Allow the Lightwave Component Analyzer to warm up, that is until the LEDs for “LD Temp Ready” and “PD Temp Ready” are lighting. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 25 12 When the following screen is displayed, make sure the optical output is connected to the optical input using the patchcord supplied Click the [OK] button to proceed. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 26 • If the optical output power is close to the specified values (see “Specifications” on page 120), perform the troubleshooting described for the network analyzer in the network analyzer documentation. If you still have a problem, contact Agilent for support. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 27: Performance Verification On The Pna

    6 Perform an electrical calibration, as described in “Calibrating the network analyzer before measurements” on page 56. 7 Switch on the laser of the optical test set, with the key switch. 8 Select [System] > [Macro] > [O/O Measurement]. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 28 Single- mode angled connector: N4372- 87902 Single- mode straight connector: N4372- 87904 Multi- mode: N4372- 87903 The Lightwave Component Analyzer calibrates the optical/optical measurement 11 When asked whether you want to save the data Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 29 • If the optical output power is close to the specified values (see “Specifications” on page 120), perform the troubleshooting described for the network analyzer in the network analyzer documentation. If you still have a problem, contact Agilent for support. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 30: Measurement Concepts

    Signal Relationships in Opto-electric Devices..34 Description of the Agilent N4373A Lightwave Component Analyzer ......... . 38...
  • Page 31: General Measurement Techniques And Considerations

    (or power) and lightwave modulation power. Optical Electrical Modulation Modulation Power Current Modulated Lightwave Input Output Laser ------------------------- E/O Measurement Photodiode ----------------------- - O/E Measurement Fiber ------------------------- O/O Measurement Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 32 Figure 4 demonstrates the basic concepts of lightwave component analysis. An analysis of how various signals are used in the measurement process is found in “Signal Relationships in Opto- electric Devices” on page 34. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 33: E/O Measurements (Lasers, Led's)

    --------------- - Responsivity R ∆ ⁄ ---------------------------- 20log ⁄ An LCA measures input modulating current and output modulation power and displays the ratio of the two in Watts/Amp, either linearly or in decibels. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 34: O/E Measurements (Photodiodes)

    The systematic responses of the components making up the LCA can then be removed, yielding the response of the device under test (DUT). (See “Signal Relationships in Opto- electric Devices” on page 34 for more detail.) Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 35: Signal Relationships In Opto-Electric Devices

    S- parameters are defined: ----- - a ----- - a where: ∆ ----------- - incident on E/O device ∆ • ∆ ----------- - reflected from E/O device ∆ ----------- - incident on O/E device Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 36 O/E receiver responsivity ∆ Using the above relationships, we can rewrite S in terms of the transducer responsivities R and R ∆ -------- - ∆ • ∆ ------------------------- - ∆ ⁄ • ----- - Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 37 The measurement of modulation current is derived from the system characteristic impedance and a measurement of electrical power. The measurement of optical modulation power is based on a “standard” lightwave receiver whose characteristics are predetermined and known by the LCA. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 38: Single And Balanced Port Measurements

    The optical port of the device is a third port. For valid balanced measurements, make sure the electrical calibration of the network analyzer includes at least three ports. For more details on balanced port measurements, please consult the PNA user’s guide. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 39: Description Of The Agilent N4373A Lightwave Component Analyzer

    Measurement Concepts Description of the Agilent N4373A Lightwave Component Analyzer The optical test set of the Agilent N4373A Lightwave Component Analyzer is a passive add-on to a network analyzer. The controls for the signal applied to the device under test and the evaluation of the returning signal are all performed by the network analyzer.
  • Page 40 Microwave device characterization (electrical-in and electrical- out) Electrical transfer function tests • Insertion loss or gain • Output power flatness • Group delay and deviation from linear Electrical reflection response tests • Port impedance or return loss Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 41 Measurement Concepts Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 42: Making Measurements On The Ena

    Measuring Opto-Electrical Devices on the ENA ..46 Measuring Optical-Optical Devices on the ENA ..49 Returning to Electrical Measurements on the ENA ..53 Agilent N4373A Lightwave Component Analyzer, Preliminary Edition...
  • Page 43: Starting The Lightwave Component Analyzer On The Ena

    The “On” LED lights to indicate the laser is on. 5 If your Lightwave Component Analyzer has more than one wavelength, select the wavelength at which you want to measure by pressing the button under the Wavelength LEDs. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 44: Calibrating The Network Analyzer Before Measurements

    “Returning to Electrical Measurements on the ENA” on page 53 to do the calibration. Do the calibration using the network analyzer calibration kit according to the instructions in the network analyzer user guide and online help. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 45: Measuring Electro-Optical Devices On The Calibrating The E/O Measurement

    “Returning to Electrical Measurements on the ENA” on page 53). 2 Press the “Macro Run” button on the front panel of the network analzer. Select [E/O Measurement] The following dialog box will be displayed: Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 46: Making E/O Measurements

    Making E/O measurements You can now connect your device under test. The measurement begins automatically. Please refer to the user guide and online help of the network analyzer for further information on measuring. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 47: Measuring Opto-Electrical Devices On The Calibrating The O/E Measurement

    3 If you are using an adaptor to connect a device with an output with 75 Ω impedance to the 50 Ω input of the ENA, please check the box here. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 48 [Start] button to start the measurement preparation. 8 When the following screen is displayed, make sure the optical output is connected to the optical input using the patchcord supplied Click the [OK] button to proceed. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 49: Making O/E Measurements

    Making O/E measurements You can now connect your device under test. The measurement begins automatically. Please refer to the user guide and online help of the network analyzer for further information on measuring. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 50: Measuring Optical-Optical Devices On The Calibrating The O/O Measurement

    “Returning to Electrical Measurements on the ENA” on page 53). 2 Press the “Macro Run” button on the front panel of the network analzer. Select [O/O Measurement] The following dialog box will be displayed: Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 51 [Start] button to start the measurement preparation. 8 When the following screen is displayed, make sure the optical output is connected to the optical input using the Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 52 [Save]. • If you will have no need to reuse or refer to this calibration data, click [No]. 10 When the message box is displayed, click the [OK] button to start the measurement. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 53: Making O/O Measurements

    Making Measurements on the ENA Making O/O measurements You can now connect your device under test. Please refer to the user guide and online help of the network analyzer for further information on measuring. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 54: Returning To Electrical Measurements On The

    5 When the message box is displayed, click the [OK] button to start the measurement. Please refer to the user guide and online help of the network analyzer for further information on electrical measurements. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 55 Making Measurements on the ENA Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 56: Making Measurements On The Pna

    Measuring Opto-Electrical Devices on the PNA ..65 Measuring Optical-Optical Devices on the PNA ..71 Returning to Electrical Measurements on the PNA ..75 Agilent N4373A Lightwave Component Analyzer, Preliminary Edition...
  • Page 57: Starting The Lightwave Component Analyzer On The Pna

    • Decreasing the IF bandwidth improves the S/N ratio of the measurement. However, doing so increases the calibration and measurement times, so a suitable IF bandwidth should be selected. • Apply appropriate averaging or smoothing. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 58 “Returning to Electrical Measurements on the PNA” on page 75, to do the calibration. Do this using the network analyzer calibration kit according to the instructions in the network analyzer user guide and online help. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 59 Select “SmartCal”, and click [Next >]. c Select “3 Port Cal” and click [Next >]. d Select the appropriate Cal Kit for each port, and click [Next >].. e Follow the instructions on the screen. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 60: Configuring The Title Bar

    Title Bars menu option as soon as the network analyzer is started. The Title Bars may be turned on by selecting [View] > [Title Bars] from the PNA menu screen. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 61: Measuring Electro-Optical Devices On The Calibrating The E/O Measurement

    You do this by calibrating for an E/E measurement, as described in “Returning to Electrical Measurements on the PNA” on page 75). 2 Select [System] > [Macro] > [E/O Measurement] Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 62 7 Click on the [Start] button to start the measurement preparation. 8 When the message box is displayed, click the [OK] button to start the measurement. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 63: Making Single-Ended E/O Measurements

    Making single-ended E/O measurements. You can now connect your device under test. The measurement begins automatically. Please refer to the user guide and online help of the network analyzer for further information on measuring. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 64: Making Balanced E/O Measurements

    1 From the [Trace] menu, select [New Trace]. in DUT 2 Select the “Balanced” tab. 3 In the “Topology / Port Mapping” section, click on [Change]. 4 Make sure the Topology is selected as “SE- BAL”. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 65 6 Select the S- paramters you want to measure. This depends on how you allocated the PNA ports to the device inputs and outputs. Please refer to the PNA user guide and online help for more information. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 66: Measuring Opto-Electrical Devices On The Calibrating The O/E Measurement

    Please refer to the user guide and online help for the network analyzer for further information. Calibrating the O/E measurement 1 Select [System] > [Macro] > [O/E Measurement] The following dialog box will be displayed: Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 67 [Start] button to start the measurement preparation. 8 When the following screen is displayed, make sure the optical output is connected to the optical input using the Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 68 [No]. 10 When the message part is displayed, click the [OK] button to start the measurement. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 69: Making Single-Ended O/E Measurements

    Making single-ended O/E measurements. You can now connect your device under test. The measurement begins automatically. Please refer to the user guide and online help of the network analyzer for further information on measuring. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 70: Making Balanced O/E Measurements

    1 From the [Trace] menu, select [New Trace]. DUT out 2 Select the “Balanced” tab. 3 In the “Topology / Port Mapping” section, click on [Change]. 4 Make sure the Topology is selected as “SE- BAL”. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 71 6 Select the S- paramters you want to measure. This depends on how you allocated the PNA ports to the device inputs and outputs. Please refer to the PNA user guide and online help for more information. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 72: Measuring Optical-Optical Devices On The Calibrating The O/O Measurement

    You do this by calibrating for an E/E measurement, as described in “Returning to Electrical Measurements on the PNA” on page 75). 2 Select [System] > [Macro] > [O/O Measurement] Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 73 Continue with step 10. If you do not have a saved calibration, or if you do not want to use this file, click on the [Start] button to start the measurement preparation. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 74 [Save]. • If you will have no need to reuse or refer to this calibration data, click [No]. 10 When the message box is displayed, click the [OK] button to start the measurement. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 75: Making O/O Measurements

    Making Measurements on the PNA Making O/O measurements You can now connect your device under test. Please refer to the user guide and online help of the network analyzer for further information on measuring. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 76 4 When the message box is displayed, click the [OK] button to start the measurement. Please refer to the user guide and online help of the network analyzer for further information on electrical measurements. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 77 Making Measurements on the PNA Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 78 This system should be serviced only by authorized personnel. Using controls or adjustments or performing procedures other WARN IN G than those specified in the documentation supplied with your equipment can result in hazardous radiation exposure. Agilent N4373A Lightwave Component Analyzer, Preliminary Edition...
  • Page 79: Troubleshooting And Maintenance

    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. Agilent Technologies assumes no liability for the customer is failure to comply with these requirements. Please follow the following safety rules.
  • Page 80: Why Is It Important To Clean Optical Devices

    • Soft tissues • Pipe cleaner • Compressed air Dust and shutter caps All Agilent 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 81 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. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 82 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. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 83 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 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 84 Polymer film 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. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 85: Preserving Connectors

    All Agilent 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 Agilent Technologies Sales/Service Office. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 86: Cleaning Instrument Housings

    • 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. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 87 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. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 88 5 Blow away any remaining lint with compressed air. How to clean bare fiber adapters Bare fiber adapters are difficult to clean. Protect from dust unless they are in use. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 89 Preferred procedure Use the following procedure on most occasions. 1 Clean the lens by rubbing a new, dry cotton swab over the surface using a small circular movement. 2 Blow away any remaining lint with compressed air. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 90 Cleaning interfaces is difficult as the core diameter of a µ single- mode fiber is only about 9 m. This generally means you cannot see streaks or scratches on the surface. To be Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 91 How to clean instruments with a recessed lens interface For instruments with a deeply recessed lens interface (for example the Agilent Technologies 81633A and 81634A Power Sensors) do NOT follow this procedure. Alcohol and compressed air could damage your lens even further.
  • Page 92 1 Put the film on the surface and wait at least 30 minutes to make sure that the film has had enough time to dry. 2 Remove the film and any dirt with special adhesive tapes. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 93 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. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 94: Replacing The Fuse

    4 Make sure the replacement fuse has the same rating. 5 Put the fuse into the fuse holder. 6 Put the fuse and fuse cap into the receptacle in the rear of the case and press it into place. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 95: Checking The Operation Of The Lightwave Component

    “Starting the Lightwave Component Analyzer on the PNA” on page 56. 4 Perform the performance verification, as described in “Performance Verification on the ENA” on page 23 or “Performance Verification on the PNA” on page 26. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 96: Error Codes

    (4) is already displayed. displayed traces. One window may display up to four traces. A communication error occurred Verify that the GPIB cable is at the PNA. connected (see “Measurement preparation” on page 100). Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 97: Lca Error Codes On The Ena

    Enter an average value within the acceptable range (numerical value). Channel Number Input Error Input the channel number within the acceptable range (numerical value). Calibration Data(ErrTerm) cannot Calibration may not have been Dounload performed. Perform calibration. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 98 Verify the selected measurement data and current calibration data. Different Stop Frequency Displayed during file selection for (Between Select File and ErrTerm) O/E and O/O measurements. Verify the selected measurement data and current calibration data. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 99 O/E and O/O measurements. Verify the selected measurement data and current calibration data. File Select Cancel Displayed during file selection for O/E and O/O measurements. Displayed when [Cancel] is selected during file selection. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 100: Reinstalling The Lightwave Component Analyzer Software On The Ena

    1 From the recovery CD, copy the files LCASYSTEM.vba, and SaveToTouchstone.VBA to the directory D:\VBA 2 From the recovery CD, copy the directory \LCAMeas 3 Restore the calibration and other data from your most recent backup to the directory D:\LCAMeas\Table Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 101: Reinstalling The Lightwave Component Analyzer Software On The Pna

    The screen used to set the GPIB address for the measuring device is shown below. To get to the GIPB address configuration screen, from the PNA menu screen, select [System] > [Configure] > [SICL/GPIB]. The following screen will be displayed. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 102 Cancels any modifications. GPIB address configuration screen (controller) Set the I/O configuration for the controlling PC. 1 From the Windows taskbar, click on the icon for “Agilent IO Libraries Control”. 2 Select “Run IO Config”. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 103 VISA Name is set to hpib7 under SICL Name. If it does not, set the hpib7 for the Internal Instrument to GPIB0. When the configuration is complete, click the Edit button, and check to make sure the following settings have been set. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 104: Reinstalling The Files

    The GPIB address for the Network Analyzer is 16. This address is set by default in the program. However, situations may arise which necessitate changing the address. If the measuring device address changes, edit the InstrInof.txt file in the Information folder. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 105 1 From the top of the PNA screen, select [System] > [Macro] > [Macro Setup]. When reconfiguring, please follow the sample configuration shown below. The program designated by the Macro Executable is found in the following location. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 106 If it is running, exit the Network Analyzer application, then restart it to reactivate the LCA macros. Pulse is a macro included with the PNA and is unrelated to the Lightwave N O TE Component Analyzer. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 107: Returning The Instrument For

    Troubleshooting and Maintenance Returning the Instrument for Service Agilent Technologies aims to maximize the value you receive, while minimizing your risk and problems. We strive to ensure that you get the test and measurement capabilities you paid for and obtain the support you need.
  • Page 108: Phone Or Fax

    Latin America: (tel) +55 11 4197 3600 (fax) +55 11 4197 3800 Australia: (tel) 1 800 629 485 (fax) 1 800 142 134 Asia Pacific: (tel) +852 800 930 871 (fax) +852 800 908 476 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 109 Troubleshooting and Maintenance Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 110 Regulatory Information ......136 Declaration of Conformity......137 Agilent N4373A Lightwave Component Analyzer, Preliminary Edition...
  • Page 111: Specifications And Regulatory Information

    Introduction Introduction This chapter contains specifications and characteristics for the Agilent N4373A Lightwave Component Analyzer. For specifications specific to the network analyzer refer to the specifications chapter in the user’s documentation for the network analyzer. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 112: Definition Of Terms

    Naming of the connectors. Bandwidth (of LCA optical in) The maximum modulation frequency the LCA optical in is designed for. Decibel (dBm, dBo, dBe) A ratio in decibel (dB) is calculated as 10⋅log {ratio}. Special cases: Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 113 • for O/E: the LCA electrical in port is terminated with 50 Ohm load. • for E/O: the LCA electrical out is terminated with 50 Ohm load, LCA optical in is darkened. • for O/O: the LCA optical in is darkened. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 114 (rather than decibel space). Responsivity values are converted from Decibel (dBm, dBo, dBe) values to linear values by: decibel/10 linear = 10 The average (result) is converted back to decibels by: decibel = 10*log (linear) Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 115 The optical equivalent depends on the Responsivity of the optical receiver N O TE within the optical test set. Responsivity The amplitude response R of an E/O or O/E converter to a harmonic stimulus, expressed in units of… Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 116 LCA optical in and reflected optical power, expressed in dBo. System bandwidth The selectable modulation frequency range of the LCA for measurements. System bandwidth is a nominal specification. N O TE Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 117 (dBm) corresponding to the Maximum linear operating input power (of LCA optical in). 2 Measure the electrical noise floor (dBm) with darkened LCA optical in. 3 Calculate the difference between both (expressed in dBe). Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 118: References

    Wavelength range (of LCA optical in) The wavelength range on the LCA optical in where measurements can be performed. References according to the “Guide to the Expression of Uncertainty in Measurement” (“GUM”), BIPM, IEC, ISO et al. (1993) Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 119: Angled Connector Specifications

    The angled connector symbol is typically colored green. You should connect straight contact fiber end connectors with neutral sleeves to straight contact connectors and connect angled contact fiber end connectors with green sleeves to angled contact connectors. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 120: General Characteristics

    Conditions Warm-up time: 30 minutes Storage temperature: - 40°C to +70°C Operating temperature: +5°C to +40°C Specified temperature: +18°C to +28°C Humidity: 15% to 80% r.h., non- condensing Recommended re-calibration period: 1 year Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 121: Specifications

    (add 12 dB A/W for (add 6 dB A/W for (add 6 dB A/W for (1310 nm, 1550 nm) freq. > 6.8 GHz) freq. > 10 GHz) freq. > 10 GHz) Electrical-to-Optical Measurement Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 122 Return loss > 27dBo typ. LCA Optical Output Wavelength options #100 / #102 #101 / #102 ± ± Wavelength 1310 20 nm typ. 1550 20 nm typ. ± Unmodulated output power 0.5 dBm typ. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 123 301 within 300 kHz to 3 and 8.5 GHz, resp., with 10 Hz IFBW and 200 measurements points. 3 <1 dB small signal compression 4 Using high quality optical connectors in perfect optical condition. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 124 Specifications and Regulatory Information Performance Tests The procedures in this section test the optical performance of the Agilent N4373A Lightwave Component Analyzer (LCA). The LCA incorporates an Agilent network analyzer and an optical test set. The performance of the network analyzer itself can be verified with the procedures in the Service Guide of that instrument.
  • Page 125 The Test Record can also be used as a permanent record and may be reproduced without written permission from Agilent Technologies. Test Failure If the Agilent N4373A fails any performance test, return the instrument to the nearest Agilent Technologies Sales/ Service Office for repair. Instrument Specification Specifications are the performance characteristics of the instrument that is certified.
  • Page 126 LCA to this wavelength and record the peak signal wavelength for this 2 wavelength. LCA measurement tests 1 Set up the measurement parameters on the network analyzer according to the following table: Parameter setting Value IFBW 10 Hz Number of points Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 127 The free end of the RF cable from Port 1 will be referred to as LCA RF Output. The free end of the RF cable from Port 2 will be referred to as LCA RF Input. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 128 If Measure Mode is available, choose Single- End. 13 Reattach the optical fiber as requested in the next panel and as described in Step 5. Then run the optical calibration. When the instrument reports “Ready to Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 129 Then change the sweep setup by changing parameters according to the table below, and then repeat the electrical calibration of the network analyzer for the new parameters, as in Step 2. IFBW 100 Hz Number of points 1600 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 130 Depending on the NWA option of the LCA, this parameter is specified separately above and below a particular frequency. Determine the highest level of dark signal in these two frequency ranges and record the Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 131 0 dB, according to: RelResp_O/E(f) = ∆Resp_O/E(f) – AvgResp_O/E. Check the vertical range of this trace against the specified accuracy for optical- to- electrical system relative Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 132 Introduction Specifications and Regulatory Information frequency response uncertainty and record this range in the table. Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 133 Specifications and Regulatory Information Introduction Test Record Agilent N4373A Lightwave Component Analyzer Performance Test Page 1 of 3 Test Facility: Report No. Date: Customer: Tested by: Agilent N4373A consisting of Network Analyzer N4373A Optical Test Product No. Serial No. Serial No.
  • Page 134 Introduction Specifications and Regulatory Information Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 135 Specifications and Regulatory Information Introduction Agilent N4373A Performance Test Page 2 of 3 Agilent N4373A Report No. Date Test Equipment Description Model No. Trace No. Cal. due date Power Meter Optical Spectrum Analyzer Reference Receiver Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 136 1310 nm Source 1550nm Source Measurement Type low freq. high freq. low freq. high freq. LCA system relative frequency response uncertainty (typ.) Measurement Type 1310 nm Source 1550 nm Source Spec.(typ.) same as O/E Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 137: Regulatory Information

    Cet appareil ISM est conforme à la norme NMB- 001 du Canada. Table 1 Notice for Germany: Noise Declaration Acoustic Noise Emission LpA < 50 dB Operator position Normal operation per ISO 7779 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 138: Declaration Of Conformity

    Introduction Specifications and Regulatory Information Declaration of Conformity Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 139 Specifications and Regulatory Information Introduction Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 140 Accessories........143 Agilent N4373A Lightwave Component Analyzer, Preliminary Edition...
  • Page 141 Ordering Information Ordering Information The N4373A Lightwave Component Analyzer offers several options to satisfy customer specific measurement requirements. All configurations start with a basic system mainframe, and customers can select the desired options. Options for customer- provided network analyzers (ENA and PNA series) are also available.
  • Page 142 The main system documentation is the operating manual plus the operation manual of the selected network analyzer that describes how to operate the Agilent N4373A. Individual instrument manuals will also be supplied with supplemental documentation of any special modifications. All...
  • Page 143 Ordering Information Warranty All system warranties and support agreements are dependent upon the integrity of the Agilent N4373A. Any modification of the system software or hardware will terminate any obligation that Agilent Technologies may have to the purchaser. Please contact your local Agilent field engineer before embarking in any changes to the system.
  • Page 144 Please note, some commands are not supported, but can be emulated with macros for PNA.Macros can only be called remotely by “COM” interface. Following 8703X commands can not be supported (as the N4373A LCA does not support required measurements) • MEASOE1(O/E measurement at RF port 1) •...
  • Page 145 Ordering Information Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 146 111 level 13 ENA 99 dBm 111 requirements 119 PNA 100 dBo 111 returning instrument 106 declaration of conformity 137 markings 12 definitions 111 microwave cables 18 S/N ratio dimensions 119 improving 56 Agilent N4373A Lightwave Component Analyzer, Preliminary Edition...
  • Page 147 111 theory 37 warm- up 119 theory of operation 30 smoothing 56 warning 11 title bar s- parameter warranty 142 configuring (PNA) 59 theory 34 weight 119 specifications 120 Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 148 Index Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 149 Index Agilent N4373A Lightwave Component Analyzer, First Edition...
  • Page 151 © Agilent Technologies, Deutschland GmbH 2006 Printed in Germany May 2006 First edition, May 2006 N4373-90A01 Agilent Technologies...

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