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Agilent Technologies FieldFox N9923AN Service Manual

Rf vector network analyzer
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Agilent FieldFox
N9923AN RF Vector
Network Analyzer
Service Guide
REPRODUCTION AND DISTRIBUTION OF
THIS TECHNICAL MANUAL IS AUTHORIZED
FOR GOVERNMENT PURPOSES.
AgilentTechnologies

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Summary of Contents for Agilent Technologies FieldFox N9923AN

  • Page 1 Agilent FieldFox N9923AN RF Vector Network Analyzer Service Guide REPRODUCTION AND DISTRIBUTION OF THIS TECHNICAL MANUAL IS AUTHORIZED FOR GOVERNMENT PURPOSES. AgilentTechnologies...
  • Page 2 __________________________________________________________________________________ Service Guide This Service Guide for the Agilent Technologies FieldFox Model N9923AN RF Vector Network Analyzer being delivered under U.S. Navy Contract Number N00104-09-D-D016 has been modified to comply with the requirements of that contract. Part Number N9923-90005 March 24, 2011...
  • Page 3 Warranties, Calibration, and Notices Manual Warranty The material contained in this manual is provided “as is,” and is subject to change, without notice, in future editions. Further, to the maximum extent permitted by applicable law, Agilent disclaims all warranties, either express or implied with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose.
  • Page 4 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. Contacting Agilent Assistance with test and measurements needs and information on finding a local Agilent office are available on the Web at: http://www.agilent.com/find/assist If you do not have access to the Internet, please contact your Agilent field engineer.
  • Page 5 Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies, Inc. products. For information about these agreements and for other assistance, contact Agilent. Refer to “Contacting Agilent” on page 2-6. Safety and Regulatory Information The safety and regulatory information pertaining to this product is located in Chapter 1, “Safety and Regulatory Information.”...
  • Page 6 Service Guide N9923-90005...

  • Page 7: Table Of Contents

    Contents 1 Safety and Regulatory Information Information in This Chapter ...........1-2 Chapter One at-a-Glance .
  • Page 8 Contents 4 Troubleshooting Information in This Chapter........... 4-2 Chapter Four at-a-Glance .
  • Page 9 Contents 6 Replaceable Parts Information in This Chapter ...........6-2 Chapter Six at-a-Glance .
  • Page 10 Contents Contents-4 Service Guide N9923-90005...

  • Page 11: Safety And Regulatory Information

    Safety and Regulatory Information Service Guide N9923-90005...

  • Page 12: Information In This Chapter

    Safety and Regulatory Information RF Vector Network Analyzer Information in This Chapter N9923AN Information in This Chapter This chapter provides safety information that will help protect you and your network analyzer. It also contains information that is required by various government regulatory agencies.

  • Page 13: Safety Symbols

    RF Vector Network Analyzer Safety and Regulatory Information N9923AN Safety Symbols Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instrument. Caution denotes a hazard. It calls attention to a procedure that, if not CAUTION correctly performed or adhered to, could result in damage to or destruction of the instrument.

  • Page 14: Before Applying Power

    Safety and Regulatory Information RF Vector Network Analyzer General Safety Considerations N9923AN Before Applying Power If this product is not used as specified, the protection provided by WARNING the equipment could be impaired. This product must be used in a normal condition (in which all means for protection are intact) only.

  • Page 15: Electrostatic Discharge Protection

    RF Vector Network Analyzer Safety and Regulatory Information N9923AN Electrostatic Discharge Protection Electrostatic Discharge Protection Protection against electrostatic discharge (ESD) is essential while removing assemblies from or connecting cables to the network analyzer. Static electricity can build up on your body and can easily damage sensitive internal circuit elements when discharged.

  • Page 16: Regulatory Information

    Safety and Regulatory Information RF Vector Network Analyzer Regulatory Information N9923AN Regulatory Information This section contains information that is required by various government regulatory agencies. Instrument Markings The instruction documentation symbol. The product is marked with this symbol when it is necessary for the user to refer to the instructions in the documentation.

  • Page 17: Battery Disposal

    If the either the primary power battery, or the RTC (real time clock) battery (on the A3 front panel interface board) needs to be disposed of, dispose of it in accordance with your country’s requirements. If required, you may return the battery to Agilent Technologies for disposal. Refer to “Contacting Agilent”...
  • Page 18 Safety and Regulatory Information RF Vector Network Analyzer Regulatory Information N9923AN Service Guide N9923-90005...

  • Page 19: General Product Information

    General Product Information Service Guide N9923-90005...

  • Page 20: Information In This Chapter

    General Product Information RF Vector Network Analyzer Information in This Chapter N9923AN Information in This Chapter Chapter Two at-a-Glance Section Title Summary of Content Start Page Cleaning instructions for the external surfaces of your analyzer. Maintenance Page 2-3 Information about electrical maintenance of your analyzer.

  • Page 21: Maintenance

    “Contacting Agilent” on page 2-6 and to Chapter 3, “Tests and Adjustments.” Analyzer Options Below is a list of options available for the FieldFox N9923AN. Additional options may be added as product features are enhanced. Go to www.agilent.com/find/fieldfox2 information on currently available upgrade options.

  • Page 22: Power Meter (Pm) Option

    General Product Information RF Vector Network Analyzer Analyzer Options N9923AN Power Meter (PM) Option Option 302, Power Meter Mode This option allows you to use Agilent external USB power sensors to make power measurements. Cable and Antenna Test (CAT) Option Option 305, Cable and Antenna Test Mode This option allows you to make the following cable and antenna measurements: •...

  • Page 23: Agilent Support, Services, And Assistance

    “Contacting Agilent” • “Shipping Your Analyzer to Agilent for Service or Repair” Service and Support Options The analyzer’s standard warranty is a one-year return to Agilent Technologies service warranty. There are other repair and calibration options available from Agilent NOTE Technologies.

  • Page 24: Contacting Agilent

    Agilent for repair. If you wish to send your network analyzer to Agilent Technologies for service or repair: • Include a complete description of the service requested or of the failure and a description of any failed test and any error message.

  • Page 25: Tests And Adjustments

    Tests and Adjustments Service Guide N9923-90005...

  • Page 26: Information In This Chapter

    Tests and Adjustments RF Vector Network Analyzer Information in This Chapter N9923AN Information in This Chapter This chapter contains procedures to help you check, verify, and adjust your N9923AN analyzer. • The checks verify the operation of the assemblies in your analyzer. •...

  • Page 27: Before You Begin

    RF Vector Network Analyzer Tests and Adjustments N9923AN Before You Begin Before You Begin Before checking, verifying, or adjusting the analyzer, refer to the following paragraphs to: • Make sure the operating environment is within 19 to 27 ° C and 5 to 95% humidity. •...

  • Page 28: Review The Principles Of Connector Care

    Tests and Adjustments RF Vector Network Analyzer Before You Begin N9923AN Review the Principles of Connector Care Proper connector care and connection techniques are critical for accurate and repeatable measurements. Refer to Table 3-1 for tips on connector care. Prior to making connections to your analyzer, carefully review the information about inspecting, cleaning, and gaging connectors.

  • Page 29: Service Test Equipment

    RF Vector Network Analyzer Tests and Adjustments N9923AN Service Test Equipment Service Test Equipment The test equipment required for the TME based N7841A test and adjustment software is listed in the N7841A help file. The following additional test equipment is recommended when servicing the N9923AN analyzer: •...

  • Page 30: Before Returning An Instrument To A Customer

    Tests and Adjustments RF Vector Network Analyzer Before Returning an Instrument to a Customer N9923AN Before Returning an Instrument to a Customer When finished servicing an N9923AN analyzer, perform the following before returning the unit to the customer: • Set the Display Colors to Indoors and the display Brightness to 80% via Service (7) >...

  • Page 31: Performance Tests And Adjustments

    RF Vector Network Analyzer Tests and Adjustments N9923AN Performance Tests and Adjustments Performance Tests and Adjustments The performance tests and adjustments listed below support the N9923AN analyzer. The Agilent N7841A TME software application supports these tests and adjustments. The Agilent N7841A TME software application executes on a PC under the Agilent N7800A test executive.

  • Page 32: Adjustments

    Tests and Adjustments RF Vector Network Analyzer Test Software and Information Available on the Web N9923AN Adjustments Frequency Accuracy Locks to Ext Ref 10 MHz signal via DAC. Stores DAC setting to use when not in External Reference mode. Phase Lock Accelerator This process creates factors for various phase lock capture speeds used during measurements.
  • Page 33 Troubleshooting Service Guide N9923-90005...

  • Page 34: Chapter Four At-A-Glance

    Troubleshooting RF Vector Network Analyzer Information in This Chapter N9923AN Information in This Chapter The information in this chapter helps you: • Identify the portion of the analyzer at fault. • Locate the specific troubleshooting procedure to identify the assembly or peripheral at fault.

  • Page 35: Protect Against Electrostatic Discharge (Esd)

    RF Vector Network Analyzer Troubleshooting N9923AN Protect Against Electrostatic Discharge (ESD) Protect Against Electrostatic Discharge (ESD) This is important. If not properly protected against, electrostatic discharge can seriously damage your analyzer, resulting in costly repair. To reduce the chance of electrostatic discharge, follow all of the CAUTION recommendations outlined in “Electrostatic Discharge Protection”...

  • Page 36: Getting Started With Troubleshooting

    Check the Basics A problem can often be solved by repeating the procedure you were following when the problem occurred. Before calling Agilent Technologies or returning the instrument for service, please perform the following checks: 1. Does the analyzer have power available? It is recommended that the battery is installed and the AC power adapter is also connected.

  • Page 37: Troubleshooting Organization

    RF Vector Network Analyzer Troubleshooting N9923AN Getting Started with Troubleshooting Troubleshooting Organization Follow the flowgraph in Figure 4-1 to help direct you to the correct section for troubleshooting the analyzer. Figure 4-1 Troubleshooting Organization Flowchart Go to “Power Up Troubleshooting” on page 4-6 Go to “Front Panel Group...

  • Page 38: Power Up Troubleshooting

    Troubleshooting RF Vector Network Analyzer Power Up Troubleshooting N9923AN Power Up Troubleshooting If the display is operational but the unit does not boot up successfully into CAT mode: • Make sure there is sufficient power for the unit to operate. •...

  • Page 39: Front Panel Group Troubleshooting

    RF Vector Network Analyzer Troubleshooting N9923AN Front Panel Group Troubleshooting Front Panel Group Troubleshooting If no sound: • Enter a value of just “.” (decimal point) for a frequency. A double beep should occur. Plug headphones into the unit if there is no sound from the internal speaker.

  • Page 40: Measurement Group Troubleshooting

    Troubleshooting RF Vector Network Analyzer Measurement Group Troubleshooting N9923AN Measurement Group Troubleshooting If calibration with the standard Type-N cal kit (1250-3607 or N9910X-800) gives unexpected results: • Make sure the unit is warmed up for at least 30 minutes. • Make sure the correct cal kit definition is being used; erase user data to force use of factory cal kit definitions (see Chapter 8 for information on the...

  • Page 41: Theory Of Operation

    Theory of Operation Service Guide N9923-90005...

  • Page 42: Information In This Chapter

    Theory of Operation RF Vector Network Analyzer Information in This Chapter N9923AN Information in This Chapter This chapter provides a general description of the operating theory of the N9923AN analyzer. • Theory of operation is explained to the assembly level only. •...

  • Page 43: Analyzer System Operation

    RF Vector Network Analyzer Theory of Operation N9923AN Analyzer System Operation Analyzer System Operation The N9923AN RF vector network analyzer operates as either a 1-port or 2-port network analyzer (NA). One port measurements are made using PORT 1 and two port measurements are made using both PORT 1 and PORT 2.
  • Page 44 Theory of Operation RF Vector Network Analyzer Analyzer System Operation N9923AN Figure 5-1 Overall Block Diagram Service Guide N9923-90005...

  • Page 45: Front Panel Group

    RF Vector Network Analyzer Theory of Operation N9923AN Front Panel Group Front Panel Group The front panel group consists of the following assemblies: • A3 Front Panel Interface Board • A2 LCD Assembly Refer to Figure 5-1 for a simplified overall block diagram which includes the front panel group.

  • Page 46: A2 Lcd Assembly

    Theory of Operation RF Vector Network Analyzer Front Panel Group N9923AN Digital Power Supplies Digital power supplies on the A3 front panel interface board are driven by the Unreg DC voltage from the A5 system board. The 5 volts produced is used on the A3 front panel interface board and the A5 system board.

  • Page 47: Measurement Group

    RF Vector Network Analyzer Theory of Operation N9923AN Measurement Group Measurement Group The measurement group produces a stable output signal by phase locking a synthesized voltage-controlled oscillator (VCO). The measurement group consists of the: • A4 RF Board • A5 System Board •...
  • Page 48 Theory of Operation RF Vector Network Analyzer Measurement Group N9923AN Figure 5-2. Simplified RF Block Diagram Service Guide N9923-90005...
  • Page 49 RF Vector Network Analyzer Theory of Operation N9923AN Measurement Group The settings of the FINE ATTEN and COARSE ATTEN attenuators between the source and the reflectometer are determined by the Hi/Lo power setting on the user interface. Each reflectometer performs three functions: •...

  • Page 50: A5 System Board

    Theory of Operation RF Vector Network Analyzer Measurement Group N9923AN A5 System Board The A5 system board controls all of the functions of the analyzer and digitizes the RF IF signals (NA-R, NA-A, and NA-B) from the A4 RF board. The A6 SOM (System on Module) board is mounted directly on the A5 system board.
  • Page 51 RF Vector Network Analyzer Theory of Operation N9923AN Measurement Group conserve power and minimize heat. This is accomplished through load switching. See “Power Management Circuitry” on page 5-9 for more information. Figure 5-3 Simplified System Board Block Diagram Service Guide N9923-90005 5-11...
  • Page 52 Theory of Operation RF Vector Network Analyzer Measurement Group N9923AN The System Monitor controls the on/off functions of the analog power supplies. All are on or off together except for power sequencing. This circuitry also monitors the Ext DC input and, if below 10.8 volts or above 21 volts, it disconnects this input from the Unreg DC.

  • Page 53: A6 Som Board

    RF Vector Network Analyzer Theory of Operation N9923AN Measurement Group SOM Connector Refer to “A6 SOM Board” on page 5-13 for information on SOM (System on Module) functions. A6 SOM Board The A6 SOM (System on Module) board plugs directly into the A5 system board as a daughter board and contains: •...

  • Page 54: Grounding And Power

    Theory of Operation RF Vector Network Analyzer Grounding and Power N9923AN Grounding and Power Grounding Each printed circuit board has a single ground plane. The ground planes on the A4 RF board and A5 system board are connected via the common shields at multiple points. The ground plane on the A3 front panel interface board is connected to the ground plane on the A5 system board.

  • Page 55: Power Control And Management

    RF Vector Network Analyzer Theory of Operation N9923AN Grounding and Power Power Control and Management Power States The On/Off Button is used to switch between On, Off, and Standby power states: Off Only the System Monitor and battery control circuits are powered up (if power is available from the battery or external power).

  • Page 56: Battery Related Information

    Theory of Operation RF Vector Network Analyzer Grounding and Power N9923AN Battery Related Information Battery Description and Operation The main battery is an SBS (Smart Battery System) compliant pack of lithium ion cells. Refer to “Battery Disposal” on page 1-7 for important information about replacing and disposing of this battery.
  • Page 57 RF Vector Network Analyzer Theory of Operation N9923AN Grounding and Power • If the analyzer is On, the lightening bolt is displayed in the battery icon. • If the analyzer is Off, the LED below the On/Off Button slowly flashes orange with increasing intensity.

  • Page 58: Operation In Modes

    Theory of Operation RF Vector Network Analyzer Operation in Modes N9923AN Operation in Modes The N9923AN FieldFox RF Vector Network Analyzer User’s Guide (Part Number N9923-90006) describes the various modes of operation and describes the user interface for each mode. The following information describes how the hardware is used in the various modes to make measurements.

  • Page 59: Cat, Na, And Vmm Modes

    RF Vector Network Analyzer Theory of Operation N9923AN Operation in Modes For most screens under System 7 key, the current measurement mode continues to operate while the screen is displayed. For instance, while the battery information screen is displayed, the measurement mode remains active. There are two exceptions to this: •...

  • Page 60: Temperature Related Information

    Theory of Operation RF Vector Network Analyzer Temperature Related Information N9923AN Temperature Related Information Four temperature sensors are in the analyzer: one on the A4 RF board, two on the A5 system board, and one in the battery pack. • RF1—on the A4 RF board •...

  • Page 61: User Calibration In Cat And Na Modes

    RF Vector Network Analyzer Theory of Operation N9923AN User Calibration in CAT and NA Modes User Calibration in CAT and NA Modes There are two types of calibrations for the CAT and NA modes: one port and two port. See the N9923AN FieldFox RF Vector Network Analyzer User’s Guide (Part Number N9923-90006) “Calibration for CAT and NA Modes”...

  • Page 62: User Calibration

    Theory of Operation RF Vector Network Analyzer User Calibration in CAT and NA Modes N9923AN User Calibration A user calibration is performed with a mechanical cal kit. The N9923AN User’s Guide (Part Number N9923-90006) refers to a user calibration as a “mechanical cal”. 5-22 Service Guide N9923-90005...

  • Page 63: Firmware Related Information

    RF Vector Network Analyzer Theory of Operation N9923AN Firmware Related Information Firmware Related Information General Description The analyzer is based on the Windows CE operating system. This is a closed system; no direct user access to the desktop of general operating system functions is provided. The file system for Windows CE is maintained in flash memory on the A6 SOM board.

  • Page 64: Error Log

    Theory of Operation RF Vector Network Analyzer Firmware Related Information N9923AN Error Log Chapter 8 for instructions on viewing the error log. The error log is cleared each time the analyzer is powered off. Generally, an entry in the error log is created whenever an error message is displayed. EXAMPLE: Attempting to set the frequency to a value of “.”...

  • Page 65: Lan Interface

    RF Vector Network Analyzer Theory of Operation N9923AN LAN Interface LAN Interface See the “System Configuration” section of the N9923AN FieldFox RF Vector Network Analyzer User’s Guide (Part Number N9923-90006) for details on reviewing and configuring LAN settings. The LAN interface supports Auto MDIX. When a LAN cable is connected to the FieldFox, if the other end of the cable supports Auto MDIX, there is no need for a cross-over cable.
  • Page 66 Theory of Operation RF Vector Network Analyzer LAN Interface N9923AN 5-26 Service Guide N9923-90005...

  • Page 67: Replaceable Parts

    Replaceable Parts Service Guide N9923-90005...

  • Page 68: Information In This Chapter

    Replaceable Parts RF Vector Network Analyzer Information in This Chapter N9923AN Information in This Chapter This chapter: • identifies the replaceable parts for the N9923AN RF vector network analyzer. • includes several tables and illustrations to assist you in identifying the correct part for your analyzer.

  • Page 69: Ordering Information

    To order a part listed in the replaceable parts lists: • include the part number • indicate the quantity required • Contact Agilent Technologies for instructions on where to send the order. Refer to “Contacting Agilent” on page 2-6. To order a part that is not listed in the replaceable parts lists: •...

  • Page 70: Assembly Replacement Procedure

    Replaceable Parts RF Vector Network Analyzer Assembly Replacement Procedure N9923AN Assembly Replacement Procedure The following steps describe how to replace an assembly in the analyzer. Step 1. Identify the faulty group. Begin with Chapter 4, “Troubleshooting.” Follow up with the appropriate troubleshooting chapter that identifies the faulty assembly. Step 2.

  • Page 71: Replaceable Parts Listings

    RF Vector Network Analyzer Replaceable Parts N9923AN Replaceable Parts Listings Replaceable Parts Listings Entire Analyzer Figure 6-1 Entire Analyzer, Exploded View Descriptions and part numbers for the assemblies and parts in each group shown in the above illustration can be found at the following locations: •...

  • Page 72: Front Panel Group

    Replaceable Parts RF Vector Network Analyzer Replaceable Parts Listings N9923AN Front Panel Group Reference Designator Part Number Description Replacement Assemblies A3 Front Front Panel Board Assembly—Includes: Panel Board N9923-60003 A3 front panel interface board Assembly Separately Replaceable Individual Parts and Assemblies Keypad assembly (Part of Front Enclosure Assembly and not separately replaceable;...
  • Page 73 RF Vector Network Analyzer Replaceable Parts N9923AN Replaceable Parts Listings Figure 6-2 Front Panel Group, Exploded View Service Guide N9923-90005...

  • Page 74: Measurement Group

    Replaceable Parts RF Vector Network Analyzer Replaceable Parts Listings N9923AN Measurement Group Reference Designator Part Number Description Replacement Assemblies RF Assembly—Includes the following: A4 RF board; (1) system board gasket kit, 2 gaskets; (2) RFI wafer gasket, qty 2; (3) Insulator, qty 2; (4) Thread guard, big pocket;...
  • Page 75 RF Vector Network Analyzer Replaceable Parts N9923AN Replaceable Parts Listings Figure 6-3 Measurement Group, Exploded View Service Guide N9923-90005...

  • Page 76: Case Group

    Replaceable Parts RF Vector Network Analyzer Replaceable Parts Listings N9923AN Case Group Reference Designator Part Number Description Replacement Assemblies Front Enclosure Assembly—Includes the following: (1) Front case with A1 keypad installed Front (2) RFI O-strip, hollow (3) LCD lens filter Enclosure N9923-60020 (4) Keypad overlay...
  • Page 77 RF Vector Network Analyzer Replaceable Parts N9923AN Replaceable Parts Listings Reference Designator Part Number Description (23) N9910-80002 Strap handle (24) W1312-40056 Blank side panel (25) Dowel pins 1480-0793 (26) Door, top (USB) W1312-60048 (27) Door, middle (SD) W1312-60049 (28) Door, bottom (LAN) W1312-60050 Figure 6-4 Case Group, Exploded View...

  • Page 78: Miscellaneous Parts

    Replaceable Parts RF Vector Network Analyzer Replaceable Parts Listings N9923AN Miscellaneous Parts Table 6-1 Part Numbers for Miscellaneous Parts and Accessories Model or Part Description Number Repair and Re-assembly Kit IMPORTANT This kit is required each time the N9923AN case is opened for any reason. The kit includes the following items, some or all of which are necessary to re-assemble the internal assemblies and the case, depending upon the depth of the repair.

  • Page 79: Repair And Replacement Procedures

    Repair and Replacement Procedures Service Guide N9923-90005...

  • Page 80: Information In This Chapter

    Repair and Replacement Procedures RF Vector Network Analyzer Information in This Chapter N9923AN Information in This Chapter This chapter contains procedures for removing and replacing the major assemblies of your N9923AN RF vector network analyzer. Chapter Seven at-a-Glance Section Title Summary of Content Start Page Personal Safety Warnings...

  • Page 81: Personal Safety Warnings

    RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Personal Safety Warnings Personal Safety Warnings These servicing instructions are for use by qualified personnel only. WARNING To avoid electrical shock, do not perform any servicing unless you are qualified to do so. Danger of explosion if battery is incorrectly replaced.

  • Page 82: Assembly Replacement Sequence

    Repair and Replacement Procedures RF Vector Network Analyzer Assembly Replacement Sequence N9923AN Assembly Replacement Sequence The following steps show the sequence that you should follow to replace an assembly in the network analyzer. Step 1. Identify the faulty group. Begin with Chapter 4, “Troubleshooting.”...

  • Page 83: Removing And Replacing The Main Battery

    RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Main Battery Removing and Replacing the Main Battery Tools Required • None Refer to “Battery Disposal” on page 1-7 for important instructions on IMPORTANT disposing of the old battery. Replacing the Main Battery 1.

  • Page 84: Removing And Replacing The Case Group Parts

    Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Case Group Parts N9923AN Removing and Replacing the Case Group Parts Tools Required • T-8 TORX driver (set to 6 in-lb) • T-10 TORX driver (set to 9 in-lb) •...
  • Page 85 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Case Group Parts 2. To replace the entire kickstand assembly: a. Lift the kickstand assembly off of the rear case and discard it. b. Place the new kickstand assembly on the rear case. c.
  • Page 86 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Case Group Parts N9923AN Separating the Front and Rear Cases 1. Remove the battery. Refer to “Removing and Replacing the Main Battery” on page 7-5. 2. Loosen the six screws (item 3) that secure the RF top panel. It should not be necessary to remove these screws, just loosen them.
  • Page 87 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Case Group Parts 4. Separate the cases and position the rear case to one side, as shown in Figure 7-5, to allow access to the blank side panel and strap handle. 5.
  • Page 88 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Case Group Parts N9923AN 7. Position the cases side-by-side as shown in Figure 7-6. 8. Unplug the battery cable, W10, from the A5 system board at the location indicated. 9.
  • Page 89 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Case Group Parts Replacing the Battery Cable 1. Separate the front and rear cases. See “Separating the Front and Rear Cases” on page 7-8. 2. Note the orientation of the cable for installation of the new cable, then, using a small flat-blade screwdriver to move the cable connector, release the retention clips on the cable connector and remove the cable from the rear case.
  • Page 90 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Case Group Parts N9923AN 3. Slip the new strap handle over the dowel pins. 4. Reinstall the rear case onto the front case. See Combining the Front and Rear Cases.
  • Page 91 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Case Group Parts 4. Remove the three doors from the old I/O side panel: a. Open each door to its stopping point, then GENTLY force it beyond its stopping point to separate it from the panel.
  • Page 92 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Case Group Parts N9923AN Replacing the Front Case (including the A1 Keypad) 1. Separate the front and rear cases. See Separating the Front and Rear Cases. 2. Remove the measurement group assemblies (RF top panel assembly, A4 RF board, A5 system board, and A6 SOM board) as one unit with the I/O panel attached.
  • Page 93 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Case Group Parts 10.Reinstall the rear case onto the front case. Refer to “Combining the Front and Rear Cases” on page 7-15. Combining the Front and Rear Cases 1.
  • Page 94 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Case Group Parts N9923AN 5. Position the rear case on top of the front case and to one side as shown. 6. Place the blank side panel in the groove in the front case being careful not to damage the gasket.
  • Page 95 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Case Group Parts 8. Position the rear case directly over, and aligned with, the front case and the side panels as shown. 9. Make sure the battery cable is tucked in between the measurement group assemblies and the blank side panel and that it is not in the path of the screw hole indicated.

  • Page 96: Removing And Replacing The Front Panel Group Assemblies

    Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Front Panel Group Assemblies N9923AN Removing and Replacing the Front Panel Group Assemblies Tools Required • T-8 TORX driver (set to 6 in-lb) • T-10 TORX driver (set to 9 in-lb) •...
  • Page 97 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Front Panel Group Assemblies 6. Reinstall the RPG knob. Refer to step of this procedure. 7. Perform the steps under “Post-replacement Procedure” on page 7-24. Figure 7-14 Replacing the RPG and RPG Knob Service Guide N9923-90005 7-19...
  • Page 98 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Front Panel Group Assemblies N9923AN Replacing the A2 LCD, the LCD Shield, and LCD Cables 1. Perform the steps under “Pre-replacement Procedure” on page 7-18. 2. To replace the LCD shield: a.
  • Page 99 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Front Panel Group Assemblies Figure 7-15 Replacing the A2 LCD, the LCD Shield, and LCD Cables Service Guide N9923-90005 7-21...
  • Page 100 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Front Panel Group Assemblies N9923AN Replacing the A3 Front Panel Interface Board (FPIB) The A3 front panel interface board contains a Lithium-ion battery. Refer to IMPORTANT “Battery Disposal” on page 1-7 for important instructions on disposing of this printed circuit board with the battery attached.
  • Page 101 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Front Panel Group Assemblies Figure 7-16 Replacing the A3 Front Panel Interface Board Service Guide N9923-90005 7-23...
  • Page 102 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Front Panel Group Assemblies N9923AN Replacing the Real Time Clock (RTC) Battery Located on the A3 Front Panel Interface Board (FPIB) The RTC battery is a Lithium-ion battery and must be disposed of properly. IMPORTANT Refer to “Battery Disposal”...

  • Page 103: Removing And Replacing The Measurement Group Assemblies

    RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Measurement Group Assemblies Removing and Replacing the Measurement Group Assemblies Tools Required • T-8 TORX driver (set to 6 in-lb) • T-10 TORX driver (set to 9 in-lb) •...
  • Page 104 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Measurement Group Assemblies N9923AN Figure 7-18 Removing All Measurement Group Assemblies as One Unit 7-26 Service Guide N9923-90005...
  • Page 105 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Measurement Group Assemblies Replacing the RF Top Panel Assembly 1. Separate the front and rear cases. Refer to “Separating the Front and Rear Cases” on page 7-8. 2.
  • Page 106 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Measurement Group Assemblies N9923AN Replacing the Type-N RF Connectors and RF Cables 1. Separate the front and rear cases. See “Separating the Front and Rear Cases” on page 7-8.
  • Page 107 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Measurement Group Assemblies Replacing the A6 SOM Board and Flexible RF Cables 1. Separate the front and rear cases. Refer to “Separating the Front and Rear Cases” on page 7-8.
  • Page 108 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Measurement Group Assemblies N9923AN Figure 7-21 Replacing the A6 SOM Board and Flexible RF Cables 7-30 Service Guide N9923-90005...
  • Page 109 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Measurement Group Assemblies Replacing the A5 System Board 1. Separate the front and rear cases. See “Separating the Front and Rear Cases” on page 7-8. 2. Remove all measurement group assemblies as one unit. Refer to “Removing All Measurement Group Assemblies as One Unit”...
  • Page 110 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Measurement Group Assemblies N9923AN Figure 7-22 Replacing the A5 System Board 7-32 Service Guide N9923-90005...
  • Page 111 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Measurement Group Assemblies Replacing the RF Assembly Including the A4 RF Board 1. Separate the front and rear cases. Refer to “Separating the Front and Rear Cases” on page 7-8.
  • Page 112 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Measurement Group Assemblies N9923AN Figure 7-23 Replacing the RF Assembly Including the A4 RF Board 7-34 Service Guide N9923-90005...
  • Page 113 RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Removing and Replacing the Measurement Group Assemblies Reinstalling All Measurement Group Assemblies as One Unit 1. Reinstall the I/O side panel, if needed. Refer to “Replacing the I/O Side Panel, Doors, and Gasket”...
  • Page 114 Repair and Replacement Procedures RF Vector Network Analyzer Removing and Replacing the Measurement Group Assemblies N9923AN Figure 7-24 Replacing All Measurement Group Assemblies as One Unit 7-36 Service Guide N9923-90005...

  • Page 115: Post-Repair Procedures

    RF Vector Network Analyzer Repair and Replacement Procedures N9923AN Post-Repair Procedures Post-replacement Procedure 1. Reinstall the measurement group assemblies into the front case. Refer to “Reinstalling All Measurement Group Assemblies as One Unit” on page 7-35. 2. Combine the front and rear cases. Refer to “Combining the Front and Rear Cases”...

  • Page 116: Manual Checks And Procedures

    Repair and Replacement Procedures RF Vector Network Analyzer Post-Repair Procedures N9923AN Manual Checks and Procedures Manual Check of Keyboard Check that each key works properly. Check that the keyboard backlight LEDs come on when a key is pressed. Manual Check of LCD Press Service (7) >...

  • Page 117: General Purpose Maintenance And Service Procedures

    General Purpose Maintenance and Service Procedures Service Guide N9923-90005...

  • Page 118: Information In This Chapter

    General Purpose Maintenance and Service Procedures RF Vector Network Analyzer Information in This Chapter N9923AN Information in This Chapter Chapter Eight at-a-Glance Section Title Summary of Content Start Page Supplemental Information Web site for additional service infomation page 8-3 that becomes available after printing of this manual.

  • Page 119: Supplemental Information

    RF Vector Network Analyzer General Purpose Maintenance and Service Procedures N9923AN Supplemental Information Supplemental Information Supplemental information for this service guide is available at: http://na.tm.agilent.com/fieldfox/serv_guide_supplement.html This web site contains additional service information and is updated as new information becomes available. Service Related User Operations To View Currently Installed Options •...

  • Page 120: To View Temperature Readings

    General Purpose Maintenance and Service Procedures RF Vector Network Analyzer Service Related User Operations N9923AN See the “Firmware Related Information” section of Chapter 5 for details on the error log. To View Temperature Readings • Press System(7). • Press Service Diagnostics. •...

  • Page 121: Options

    RF Vector Network Analyzer General Purpose Maintenance and Service Procedures N9923AN Options Options Installed options determine the functionality of the analyzer. There is a license associated with each option. Every instrument has at least one option installed, “104”, or “106”. This option determines the maximum frequency of the instrument.

  • Page 122: Firmware Upgrades

    General Purpose Maintenance and Service Procedures RF Vector Network Analyzer Firmware Upgrades N9923AN Firmware Upgrades To Check the Current Firmware Revision • Press System(7). • Press Service Diagnostics. • Press System Information. The current firmware version is indicated on the “Firmware Release” line. For information on upgrading FieldFox firmware, go to www.agilent.com/find/fieldfox2 follow the Firmware links.

  • Page 123: Miscellaneous Service And Maintenance

    RF Vector Network Analyzer General Purpose Maintenance and Service Procedures N9923AN Miscellaneous Service and Maintenance Miscellaneous Service and Maintenance Cleaning the Display Materials: Use a soft, lint-free cloth. Use a solution with 99.5% IPA (isopropyl alcohol) or a high quality window cleaning solution. Technique: Do not rub back and forth with a polishing motion.
  • Page 124 General Purpose Maintenance and Service Procedures RF Vector Network Analyzer Miscellaneous Service and Maintenance N9923AN Service Guide N9923-90005...
  • Page 125 Index equipment for service A1 keypad calibration erase user data utility 5-23 illustrated ANSI Z540 standards error log 5-23 part number compliant, Option A6J removal and replacement commercial, Option UK6 protection A2 LCD in CAT and NA modes 5-21 supplies illustrated ISO 17025 standards compliant, part numbers...
  • Page 126 Index battery charging management replaceable 5-16 listing of keyboard CAT and NA modes 5-19 ordering information manual check 7-38 CPU board 5-13 post-repair procedures 7-37 keypad power front panel group illustrated control 5-14 front panel interface board part number management 5-14 grounding 5-14...
  • Page 127 Index warnings about tools case group part numbers 6-12 view procedure view current firmware revision current firmware revision CPU board 7-25 currently installed options front panel group assemblies view currently installed options 7-18 temperature readings LCD shield 7-18 view temperature readings the error log main battery view the error log...
  • Page 128 N9923-90005 Copyright Agilent Technologies, Inc. 2009, 2010, 2011 Agilent Technologies No. N9923-90005...

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