Keysight N9040B Option 508 Service Manual
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Keysight N9040B Option 508 Service Manual

Uxa signal analyzer
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Table of Contents

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Keysight Technologies
N9040B UXA Signal Analyzer
This manual provides documentation for the following
models:
N9040B Option 508 (3 Hz – 8.4 GHz)
N9040B Option 513 (3 Hz – 13.6 GHz)
N9040B Option 526 (3 Hz – 26.5 GHz)
N9040B Option 544 (3 Hz – 44 GHz)
N9040B Option 550 (3 Hz – 50 GHz)
Service Guide

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Summary of Contents for Keysight N9040B Option 508

  • Page 1 N9040B UXA Signal Analyzer This manual provides documentation for the following models: N9040B Option 508 (3 Hz – 8.4 GHz) N9040B Option 513 (3 Hz – 13.6 GHz) N9040B Option 526 (3 Hz – 26.5 GHz) N9040B Option 544 (3 Hz – 44 GHz) N9040B Option 550 (3 Hz –...
  • Page 2 Do not proceed beyond a DOCUMENT OR ANY INFORMATION to the public to use, modify, WARNING notice until the CONTAINED HEREIN. SHOULD reproduce, release, perform, indicated conditions are fully KEYSIGHT AND THE USER HAVE A display, or disclose commercial understood and met.
  • Page 3 Documentation is updated periodically. For the latest information about this instrument, including firmware upgrades, application information, and product information, click the website link below. http://www.keysight.com/find/uxa To receive the latest updates by email, subscribe to Keysight Email Updates at the following URL: http://www.keysight.com/find/MyKeysight Information on preventing instrument damage can be found at: www.keysight.com/find/PreventingInstrumentRepair...

  • Page 5: Table Of Contents

    Keysight UXA Signal Analyzer Overview ........
  • Page 6 Instrument Hangs at the Keysight Splash Screen ........
  • Page 7 Contents 4. RF Section Troubleshooting (RF/Microwave Analyzers) What You Will Find in This Chapter ............. 139 RF Section Description .
  • Page 8 Contents Verifying the 100 MHz Reference Input ............206 7.
  • Page 9 Contents What You Will Find in This Chapter ............. 235 11.
  • Page 10 Contents Replaceable Parts ................284 Hardware.
  • Page 11 Contents A22 & A23 Wideband Digital I.F. Boards ............423 Removal .
  • Page 12 Contents Test Equipment ................505 Displayed Average Noise Level (DANL) .

  • Page 13: Overview

    What You Will Find in This Chapter This chapter provides overview information on your spectrum analyzer. The following sections are found in this chapter: Keysight UXA Signal Analyzer Overview on page 14 Instrument Option Descriptions on page 15 Before You Start Troubleshooting on page 21...

  • Page 14: Keysight Uxa Signal Analyzer Overview

    If customer requirements should change or expand, post sale upgrades can be purchased at any time. Most measurement application upgrades require a license key, which is obtained using the Keysight Software Licensing service. If the email delivery option is ordered, the entitlement certificate will be emailed...

  • Page 15: Instrument Option Descriptions

    From the front panel, press System, Show, System to view a list of all installed options. A current list of all instrument options and retrofit requirements is available on the Keysight web site for the UXA signal analyzer. Option Description Notes 3 Hz to 8.4 GHz frequency range...
  • Page 16 Real Time Data Link Included on all units Security Features, exclude launch programs Security Features, prohibit saving results Solid State Drive, additional removable, fully imaged Screen Video (rear panel Analog Out connector) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 17: Signal Analyzer Accessories

    Signal Analyzer Accessories Signal Analyzer Accessories A number of accessories are available from Keysight Technologies to help you configure your analyzer for your specific applications. They can be ordered through your local Keysight Sales and Service Office and are listed below.

  • Page 18: 50 Ohm Load

    909D: DC to 26.5 GHz 50 Ohm/75 Ohm Minimum Loss Pad The Keysight 11852B is a low VSWR minimum loss pad that allows you to make measurements on 75 Ohm devices using an analyzer with a 50 Ohm input. It is effective over a frequency range of dc to 2 GHz.

  • Page 19: Rf Limiters

    Signal Analyzer Accessories RF Limiters The Keysight 11867A and N9355C RF Limiters protect the analyzer input circuits from damage due to high power levels. The 11867A operates over a frequency range of dc to 1800 MHz and begins reflecting signal levels over 1 mW up to 10 W average power and 100 watts peak power.

  • Page 20: Static Safe Accessories

    Wrist-strap, color black, stainless steel. Four adjustable links and a 7 mm post-type connection. 9300-0980 Wrist-strap cord 1.5 m (5 ft.) 9300-0797 2 ft by 4 ft conductive mat with 15 ft grounding wire Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 21: Before You Start Troubleshooting

    To prevent electrical shock, disconnect the analyzer from mains before cleaning. Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 22 Always use the three-prong ac power cord supplied with this product. Failure to ensure adequate earth grounding by not using this cord may cause product damage. This instrument has an autoranging line voltage input; be sure the supply voltage is within the specified range. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 23: Esd Information

    1 megohm of isolation from ground. These techniques for a static-safe workstation should not be used when working on circuitry with a voltage potential greater than 500 volts. Figure 1-1 Example of a Static-Safe Workstation Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 24: Handling Of Electronic Components And Esd

    For more information about preventing ESD damage, contact the Electrical Over Stress/Electrostatic Discharge (EOS/ESD) Association, Inc. The ESD standards developed by this agency are sanctioned by the American National Standards Institute (ANSI). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 25: Instrument Maintenance

    Wash thoroughly after handling. In case of spill, soak up with sand or earth. Flush spill area with water. Dispose of isopropyl alcohol in accordance with all applicable federal, state, and local environmental regulations. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 26: Battery Information

    See “How to Return Your Instrument for Service” on page 42. Replaceable parts must be approved or supplied by Keysight Technologies. Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended. Discard used batteries according to the manufacturer’s instructions.

  • Page 27: Service Equipment You Will Need

    1/4 inch socket on 4 lb torque wrench source locally cable puller 5021-6773 Calibration Application Software Information regarding the Keysight X-Series Signal Analyzer Calibration Application Software can be found at the following web site: www.keysight.com/find/calibrationsoftware Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 28: Front End Controller Troubleshooting Kit

    Part of N9020-60005 Troubleshooting kit Cable, Troubleshooting 8121-1400 Right-angle sma (m) to right-angle mmcx (m) (must be ordered separately) Connector, MMCX (f) to SMA (f) www.hubersuhner.com item number: 31_MMCX-SMZ-50-1/111_OE (must be ordered separately) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 29: Usb Keyboard And Mouse

    The main reason why a USB storage device will be needed is to download instrument software and backup calibration data when the hard drive in an instrument needs to be replaced. The instrument software is about 3 GB. The calibration files are around 30 megabytes. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 30: Required Test Equipment List

    Only the recommended and alternate equipment is compatible with the performance verification testing. Some tests can use various models of a particular equipment type. The “Recommended Keysight Model” is the preferred equipment. However, the “Alternative Keysight Model” is an acceptable substitute.
  • Page 31 8491A (Option 006, H33 10 dB Fixed Attenuator 8491B (Option 010, H33) 8491A (Option 010, H33 10 dB Fixed Attenuator 8493C (Option 010) 20 dB Fixed Attenuator 8491A (Option 020) 8491B (Option 020) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 32 (2 required) BNC 50 Ω Coaxial, 10503A P, T BNC (m) both ends (3 required) Filters 50 MHz Low Pass, Telonic Berkeley TLA 50-5AB2 0955-0306 P, T BNC (m) to BNC (f) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 33 (2 Required) 3.5 mm (f) to 2.4 mm (f) 11901B (for 2.4 mm source) 2.4 mm (f) to 3.5 mm (m) 11901D Type-N (f) to 2.4 mm (f) 11903B (for 2.4 mm source) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 34 (for power sensor calibration) 2.4 mm (f) to Type-N (m) 08487-60001 (for power sensor calibration) Type-N Tee 1250-0559 a. Keysight, Agilent, or Hewlett-Packard model numbers unless otherwise noted. b. P = Performance Testing, T = Troubleshooting c. Supported PSG models: E8247C E8257C E8257C...
  • Page 35 1. Order Option 1A7 when ordering new power sensors that will be used as working standards in N7800A TME calibrations. 2. In the Americas region, order the Keysight Cal + Measurement Uncertainty for power sensor recalibration. 3. Outside the Americas region, order ISO 17025/ILAC-G8 calibration service for power sensor recalibration.
  • Page 36 Recommended Lab Standards and Special Cal Options website. 5. The Keysight Option H99 is a special option for the Roseville Service Center [only] which provides a CD with calibration data included as a .csv file in TME N7800A format for all power sensors used with the N7800A TME application.

  • Page 37: After An Instrument Repair

    After an Instrument Repair If any instrument assemblies have been repaired or replaced, perform the related adjustments and performance verification tests. These tests are done using the N7800A Keysight Calibration Application Software. Refer to Chapter 16, “Post-Repair Procedures” for a list of post-repair adjustments and performance tests based on which hardware has been changed.

  • Page 38: Contacting Keysight Technologies

    1-2. In any correspondence or telephone conversations, refer to the instrument by its model number (N9040B) and full serial number (ex. MY49250887). With this information, the Keysight representative can quickly determine whether your unit is still within its warranty period.
  • Page 39 (65) 6375 8100 Europe and Middle Country Phone Number Austria 0800 001122 Belgium 0800 58580 Finland 0800 523252 France 0805 980333 Germany 0800 6270999 Ireland 1800 832700 Israel 1 809 343051 Italy 800 599100 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 40 0800 0233200 Russia 8800 5009286 Spain 0800 000154 Sweden 0200 882255 Switzerland 0800 805353 Opt. 1 (DE) Opt. 2 (FR) Opt. 3 (IT) United Kingdom 0800 0260637 For other unlisted countries: www.keysight.com/find/contactus Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 41: Instrument Serial Numbers

    Instrument Serial Numbers Keysight makes frequent improvements to its products enhancing performance, usability, or reliability. Keysight service personnel have access to complete records of design changes to each type of instrument, based on the instrument’s serial number and option designation.

  • Page 42: How To Return Your Instrument For Service

    How to Return Your Instrument for Service How to Return Your Instrument for Service Service Order Number If an instrument is being returned to Keysight for servicing, the phone numbers are mentioned in Table 1-2, “Contacting Keysight,” on page 39. In order for Keysight to expedite the repair please be as specific as possible about the nature of the failure.

  • Page 43: Other Packaging

    5. Seal the shipping container securely with strong nylon adhesive tape. 6. Mark the shipping container “FRAGILE, HANDLE WITH CARE” to assure careful handling. 7. Retain copies of all shipping papers. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 44 Overview How to Return Your Instrument for Service Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 45: Boot Up And Initialization Troubleshooting

    Fan(s) Are Not Operating on page 58 No Keysight Splash Screen Displayed on page 60 Instrument Hangs at the Keysight Splash Screen on page 62 Instrument Cannot Completely Load or Run the Operating System on page Troubleshooting a Blank Display on page 63...

  • Page 46: Check The Basics

    Boot Up and Initialization Troubleshooting Check the Basics Check the Basics Before calling Keysight Technologies or returning the instrument for service, please make the following checks: 1. Is there power at the power outlet? At the power receptacle on the instrument? 2.

  • Page 47: Uxa Instrument Boot Up Process

    UXA application is launched. Uncheck any applications to bypass the preloading process, select Apply, and then OK to close the Configure Applications window when finished. Figure 2-1 Configure Application Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 48: Typical Instrument Boot-Up Process Flow

    Operating” section in this chapter. 5. The Keysight Technologies splash screen is displayed in white font on a dark background for ~5-10 seconds after the analyzer is turned on. If the Keysight Technologies logo is not displayed refer to the “No Keysight...
  • Page 49 “CPU/Disk Drive Troubleshooting”, on page 211 in this manual. 8. The Keysight Technologies logo is displayed in white font on a blue background while Windows finishes loading user preferences. This can take up to 4 minutes. If this does not occur refer to the “Instrument Cannot...
  • Page 50 If the power up state has been changed from the factory power on state by IMPORTANT the user, the analyzer will boot to that state. Figure 2-2 Typical Instrument Sweep at Power-up Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 51: Potential Problems During Boot Process

    2. Remove the AC power cord and then remove the instrument cover. Refer Chapter 15, “Assembly Replacement Procedures”, on page 347 in this manual. 3. Referring to Figure 2-3, verify the +5.1V_STBY LED on the A7 Midplane board is on (green). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 52 Most DC power supplies come from the A6 Power Supply assembly. However, the most convenient measurement location for most of the DC supplies is the A7 Midplane. Many power supply LED's are accessible once the instrument cover has been removed. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 53 LED back to the A4 Processor board are not at fault, replace the A4 Processor board. If not: Replace the A6 Power Supply assembly. Before replacing the power supply, verify the midplane and motherboard interconnects are mechanically secure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 54: Green Power On Led Does Not Illuminate

    3. Remove the Top Brace. Refer to Chapter 15, “Assembly Replacement Procedures”, on page 347 in this manual. 4. Power on the UXA while visually monitoring the green LED’s by referring to the two figures below. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 55 Boot Up and Initialization Troubleshooting Potential Problems During Boot Process Figure 2-4 A7 Midplane Board LED’s - Rear View Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 56 9. Continue troubleshooting until the assembly casing the over-current condition is determined. 10.If one or more LED’s is still dim or not turned on, continue removing measurement assemblies to isolate the over-current condition. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 57 -15 V_A -15 ± 1.0 TP20 +3.3 V_A +3.3 ± 0.75 TP21 -5.2 V_A -5.2 ± 0.75 Fan_P +7 to +15 TP17 DCOM +5.1 V_STBY +5.1 ± 0.75 +12 V_D +12 ± 1.0 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 58: Fan(S) Are Not Operating

    3. Are both fans not spinning? If yes: Proceed to step If not: Proceed to step 4. Remove the Top Brace. Refer to Chapter 15, “Assembly Replacement Procedures”, on page 347 in this manual. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 59 Replace the A6 Power Supply assembly. Before replacing the power supply, verify the midplane and motherboard interconnects are mechanically secure. Figure 2-6 A7 Midplane Board - Fan_P Failure LED / Test Point 4 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 60: No Keysight Splash Screen Displayed

    No Keysight Splash Screen Displayed (Black background with white “Keysight Technologies” text) A problem of not displaying the Keysight splash screen could be caused by many different things. It could be due to a down power supply, a processor hardware problem, an instrument boot-up process error, a display section failure, etc.
  • Page 61 4. Connect an external VGA monitor to the rear panel display output. Does the external monitor display the correct information? If yes: Proceed to the “Troubleshooting a Blank Display” section in this chapter. If not: Replace the A4 Processor Board assembly. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 62: Instrument Hangs At The Keysight Splash Screen

    Potential Problems During Boot Process Instrument Hangs at the Keysight Splash Screen A problem of the instrument hanging at the Keysight splash screen could be caused by many different things. It could be due to a down power supply, a processor hardware problem, an instrument boot-up process error, etc.

  • Page 63: Instrument Cannot Completely Load Or Run The Operating System

    It could be due to a down power supply, a processor hardware problem, an instrument boot-up process error, corrupt disk drive, etc. This procedure assumes that the instrument can get past the Keysight splash screen at power on. If it doesn't, refer to the “Instrument Hangs at the Keysight Splash Screen”...

  • Page 64: Verify Video Signal Path Integrity

    Event Log. This can be accessed by using an external USB keyboard and mouse and selecting Start, Run, enter Eventvwr.exe, and select OK. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 65: Fails An Initial Alignment

    Assure there is no 50 MHz signal above 0 dBm applied to the signal analyzer input when the alignment routine is performed. This can cause errors. The description of the alignment and the alignment hardware dependencies are listed in Table 2-2. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 66 AIF LC Narrow Prefilter Passband Fine Tuning A2 Analog IF Algorithm AIF Xtal Wide Prefilter Passband Tuning A2 Analog IF A3 Digital IF or Algorithm A16 Reference AIF Xtal Narrow Prefilter Passband Tuning A2 Analog IF Algorithm Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 67 40 MHz BW signal path, A2 Analog IF is not included in the signal path. DIF 40 Variable Attenuator Algorithm A3 Digital IF AIF 255 Variable Attenuator Alignment A21 Wide band A-IF Algorithm Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 68 A21 Wideband Analog IF Algorithm Uses 4.8 GHz internal cal signal. Assure 4.8 GHz calibrator is present by viewing the calibrator on screen. Band 1 is > 3.6 GHz, high band path. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 69 Preselector Two Point Tuning Algorithm A12 YTF Preselector A13 Front End A15 Front End Controller All Low Band High Band Nominal Path System Gain All Front End components 4800 MHz calibrator on A16 Algorithm Reference Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 70 You will find the most current alignment information at the bottom of this file. Look for the failed alignments and troubleshoot the Related Hardware based on the information provided in Table 2-2. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 71: Signal Level Verification

    It is possible that other input frequencies < 3.6 GHz could have an amplitude problem even though the 50 MHz calibrator is within tolerance. Using the internal RF calibrator provides a quick check of the low band path. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 72: Signal Level Problem With

    It is possible that other input frequencies > 3.6 GHz could have an amplitude problem even though the 4.8 GHz calibrator is within tolerance. Using the internal RF calibrator provides a quick check of the high band path. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 73: Instrument Messages

    N9040B UXA Signal Analyzer Service Guide Instrument Messages Introduction The Error and Status messaging system of the Keysight Signal Analyzer reports events and conditions in a consistent fashion, as well as logging and reporting event history. Event vs. Condition Messages An Event is simply a message indicating that something has happened.

  • Page 74: Event And Condition Categories

    Warnings are logged in the error queues. If the warning is a condition, both the Detected and Cleared event messages are logged. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 75: Event Message Format

    IEEE Standard 488.2-1992, IEEE Standard Codes, Formats, Protocols and Common Commands for Use with ANSI / IEEE Std 488.1-1987. New York, NY, 1992. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 76: Event Queues

    Circular (rotating). Circular (rotating). Linear, first-in/first-out. Overflow Handling Drops oldest error as new Drops oldest error as new Replaces newest error with: error comes in. error comes in. −350, Queue overflow Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 77 Grayout Advisory (Forced) Logged Displayed in Message Line See note a. Not logged, unless the cause of the Advisory was remotely generated, in which case a Warning mes- sage, type –221, is logged. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 78: Advisory Messages

    If Marker Function is off changing the band has no effect Band Adjust has no effect with Mkr Function Off Turning on any high-pass or low-pass filter will turn off band pass filters. Band-pass filter set to OFF Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 79 Use the graph icon on the DUT setup form to clarify the setup required. Logarithmic scaling cannot be used for time domain sweeps Freq Scale Type=Log is not (0 Hz span). available in Zero Span Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 80 The LO fixed freq should be greater than the IF Stop freq for an LSB upconverter fixed LO setup. Use the graph icon on the DUT setup form to clarify the setup required. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 81 The latest cable calibration data will be used cal; using cable cal data; <port>; <probe> A probe has been disconnected, calibration data reverting to the last cable Probe disconnected, calibration data reverting to cable calibration data; <port> Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 82 Instrument Messages Advisory Messages Message Description/Correction Information The Keysight Smart Noise Source has been connected and the application Reading SNS data… is reading the device EEPROM data. Please wait until complete before continuing. A file recall (open/load) was successfully completed.
  • Page 83 The measurement setup has changed such that the current cal data can be User Cal valid. Apply Cal applied to the results. To apply the cal, press Meas Setup/Cal Setup/Apply from Meas Setup menu Calibration. A new cal can be performed if required. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 84: Event Messages

    –221, such as “Settings Conflict; Function not available in Zero Span”. This helps you understand exactly why you are getting a Settings Conflict error. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 85: 800, Operation Complete Event

    Some condition caused a DEADLOCKED query to occur. For Query DEADLOCKED example, both the input buffer and the output buffer are full and the analyzer cannot continue. The analyzer automatically discards output to correct the deadlock. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 86: -300 To -399, Device-Specific Errors

    Verbose/Correction Information –300 An instrument error occurred and the exact problem cannot be specifically Device-specific error identified. Report this error to the nearest Keysight Technologies sales or service office. –310 An internal system-type error has occurred. The exact problem cannot be System error;...
  • Page 87 System error; The Trigger alarm was not scheduled due to a conflict with an existing scheduled alarm. –311 There is a physical problem with the instrument memory, such as a parity Memory error error. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 88 There was a problem with instrument remote communications. The exact Communication error problem cannot be specifically identified. –360 The Keysight Smart Noise Source connected to the UXA has failed to be Communication error; read by the application. Please disconnect and reconnect the SNS. If this SNS data read continues to fail, then the SNS may have had its EEPROM corrupted or failure.

  • Page 89: -221 Settings Conflict Errors

    Optimize aborted –221 The Auto Tune feature cannot be used when you are using a Settings conflict; Auto Tune Tracking Source. not available in Tracking Source mode Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 90 Continuous Peak is not available with Fixed marker –221 The continuous peak feature cannot be used while you are Settings conflict; also using the signal tracking function. Continuous Peak is not available with Signal Track Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 91 –221 This functionality is not a part of the instrument you are Settings conflict; Feature using but may be found in other models in the X-Series. not supported for this model number Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 92 Edge for Gated –221 You cannot use level triggering to control the gate when you Settings conflict; Gate are using the currently selected gate source. control must be Edge for this Gate Source Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 93 –221 For instruments without the Dual-Loop LO, this feature is not Settings conflict; LO Phase available Noise Adj not available Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 94 –221 Mobile Station gain correction is not available in some Settings conflict; MS gain Modes, or in some measurements (for example, the SA is not available in this measurement). Mode Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 95 SCPI only message. This parameter is only available when Settings conflict; Param the Freq mode is set to Fixed. Change the Freq Mode to only available when Fixed. Frequency Mode is Fixed Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 96 Span. So if Zero Span is entered while in Signal Track is On, Track is turned off when Signal Track is turned off. Zero Span is selected –221 Settings Conflict; Span limited to XXX Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 97 If using an SNS the Tcold value may be read automatically before every sweep. –221 Settings Conflict; The parameter cannot be changed in FAST mode Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 98 Detectors and Average detector can’t be used together –221 Frequency is limited to 1GHz while RF Input 2 is enabled. Settings conflict;Freq > 1 GHz is not available while RF Input 2 enabled Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 99 Step/Time Control. –221 The Step Size & Meas Time are not available when Settings conflict;Step Size Step/Time Control is set to Scan Time&Pts. & Meas Time do not apply in current Step/Time Control. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 100: -200 To -299, Execution Errors

    Execution Error; No peak search. found. –200 There are no active ranges in the range table. You will need to Execution error; No ranges activate at least one range. are defined. Activate a range. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 101 Please clear the list. –200 The signal selected is not the list. You only can perform the Signal Selected is not in operation on signal that is already available in the list. the Signal List Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 102 –222 You tried to use a trace that has a number of sweep points that is Data out of range; Invalid different from the current setting of sweep points. list data Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 103 When querying the LXI Event Log or the Servo Log, an index may Illegal parameter value; be used to look at a specific entry. This error occurs if the index Index out of range provided does not point to a valid entry. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 104 Trace cannot be displayed because currently there is no data Data corrupt or stale; assigned to it. Use the functions under the Trace menu, or load a Trace contains no data. previously saved trace, to assign data to the trace. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 105 Mass storage error; Can However, if you need to recall multiple traces you can use the only import single trace Save and Recall functions rather than the Import and Export .csv files functions. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 106 The system cannot open the device or file specified. This could be Mass storage error; Open because the storage media is full, or possibly due to a filename failed error. If using an external storage devise, check that the devise is properly formatted. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 107 File name error; Allowable data/file type. extension is .state –257 The filename, directory name, or volume label syntax is incorrect. File name error; Invalid file name –257 File name error; name too long Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 108 An attempt was made to reference a nonexistent variable in a Illegal variable name program. –284 Certain operations dealing with programs may be illegal while the Program currently running program is running; for example, deleting a running program might not be possible. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 109 Memory use errors –291 Out of memory –292 Referenced name does not exist –293 Referenced name already exists –294 Indicates that the type or structure of a memory item is Incompatible type inadequate Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 110: -100 To -199, Command Errors

    A character was found that is not valid for the data type. For Invalid character in example, an alpha in a decimal numeric or a “9” in octal data. number –123 The magnitude of an exponent was greater than 32000. Exponent too large Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 111 A problem was found with an expression data element. The exact Expression error problem cannot be specifically identified. –171 An expression data element is not valid. For example, there may Invalid expression be unmatched parentheses or an illegal character. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 112: Error

    0 Error Err# Message Verbose/Correction Information The queue is empty. Either every error in the queue has been No error read, or the queue was cleared by power-on or *CLS. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 113: Condition Messages

    See section “Condition Errors 36 to 64, Calibration Needed or Failed” on page 114. Err# Bit in Message Error or More Information status Warning register Align RF Skipped unused unused unused unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 114 PTRansition filter set, or a true-to-false transition with the NTRansition filter set, in any of the :CALibration sub-registers :SKIPped, :EXTended:NEEDed or :EXTended:FAILure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 115 This bit is the summary bit for the Align Skipped Sum Summary only STATus:QUEStionable:CALibration:SKIPped sub-register. Align Now, RF required unused On PSA, this was error 64 Align Now, All required Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 116 Corrected measurements have been Input Attenuation not requested and the required RF calibrated front-end setting of x dB has not been calibrated. unused unused unused unused unused unused unused unused unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 117 On PSA, this was error 13751 Align 30MHz to 1GHz failed The preselector characterization routine Characterize Preselector failed. failure unused unused unused unused unused unused unused unused unused unused unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 118: Condition Errors 101 To 199, Measurement Integrity

    To calculate Timing and Phase results in No Result;Turn on MCE the Code Domain Power view of Mod Accuracy, the “Multi Channel Estimator” must be set to ON. Otherwise these results are invalid. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 119 A measurement is attempted or a SCPI Insufficient Data; Loss query of a before or after loss table is table empty made and there are no entries in the relevant loss table Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 120 Increase the AF Spectrum RBW or the RF Spectrum RBW, decrease the Channel BW, and/or decrease the Demod Waveform Sweep Time. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 121 Settings Alert;Parm/data parameters did not match the data mismatch Setting Modified The filter you have selected is larger Setting Modified; Filter not than the sampling frequency. You applied should select a different filter. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 122: Condition Errors 201 To 299, Signal Integrity

    This register is summarized as bit 0 of the STATus:QUEStionable:INTegrity register. See section “Condition Errors 101 to 199, Measurement Integrity” on page 118. Err# Bit in Message Error or More Information Status Warning Register unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 123 WLAN burst. You may need to extend the search length. In the PSA, this error was reported as one of the following error numbers: 10772, 13104, 10160, 10286, 10420, 10454, 10614, 10904, 10928, 13074, 10287 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 124 Failed to find the uplink slot, which caused Sync Error;Midamble the synchronization with the midamble to sync fail fail. Burst type is “Data” or “Preamble” and the Sync Error;Preamble measurement cannot find a Preamble length zero Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 125 Meas Setup menu. There are not enough input I/Q pairs for the Demod Error;Data measurement calculation. This may be interval too short caused by an incorrect data capture. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 126 Slot Error; No idle no idle slot found in captured interval. slot found Synchronization may succeed and pilot found when this message is issued, but no results are included in peak/average calculation. unused unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 127 Instrument Messages Condition Messages Err# Bit in Message Error or More Information Status Warning Register unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 128: Condition Errors 301 To 399, Uncalibrated Integrity

    Signal ID on No Long Code Phase AC input coupling will function at lower AC coupled: Accy unspec’d frequencies, but the performance is not <10 MHz specified below 10 MHz. User cal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 129 A successful calibration has been performed. • Some measured freq points are > 3.6 GHz. • The new points > 3.6 GHz are located more than 50 MHz away from the current calibration points. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 130 This depends on both Start Freq and RBW. If you get this message, increase your Start Freq or narrow your RBW. unused unused unused unused unused unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 131 Instrument Messages Condition Messages Err# Status Message Error or Verbose/Correction Information Register Warning unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 132: Condition Errors 401 To 499, Power

    (not currently in use) RPP Tripped Source Unleveled (not currently in use) Source LO Unleveled (not currently in use) LO Unleveled unused unused unused unused unused Preselector Overload unused unused unused unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 133: Condition Errors 501 To 599, Frequency

    The external frequency reference signal External ref missing or is missing or is not within the proper out of range amplitude range. In the PSA, this error was reported as error 622 unused unused unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 134: Condition Errors 601 To 699, Error Summaries

    This bit is the summary bit for the Temperature only STATus:QUEStionable:TEMPerature sub-register. status bit This bit is the summary bit for the Frequency only STATus:QUEStionable:FREQuency sub-register. Phase unused Modulation unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 135 This bit is the summary bit for the Calibration only STATus:QUEStionable:CALibration sub-register. status bit This bit is the summary bit for the Integrity only STATus:QUEStionable:INTegrity sub-register. unused CALL unused unused unused Command Warning unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 136: Condition Errors 701 To 799, Operation

    Waiting for Trigger status bit only Waiting for Arm unused status bit only Paused status bit only Source Sweeping DC Coupled unused status bit only Source Waiting for Trigger unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 137: Condition Errors 801 To 899, Temperature

    Bit in Message Error or More Information status Warning register (not currently in use) Reference Oscillator Oven Cold unused unused unused unused unused unused unused unused unused unused unused unused unused unused Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 138 Instrument Messages Condition Messages Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 139: Rf Section Troubleshooting (Rf/Microwave Analyzers)

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide RF Section Troubleshooting (RF/Microwave Analyzers) What You Will Find in This Chapter The following information is found in this chapter: 1. Theory of operation of the RF section. 2. Isolating the cause of an hardware problem by verifying the functionality of assemblies in the RF section signal path.

  • Page 140: Rf Section Description

    25 MHz (Option B25) 322.5 MHz IQ Analyzer 40 MHz (Option B40) 250 MHz IQ Analyzer 255 MHz (Option B2X) 750 MHz IQ Analyzer 510 MHz (Option B5X) 877 MHz IQ Analyzer Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 141 A13A1J7. This signal path is used for all frequency range options when the RF input frequencies are < 3600 MHz. The control voltages and biasing for these assemblies come from the A15 Front End Control assembly. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 142: A9 Input Attenuator A

    Low Band Switch assembly. There is a 6 dB, 10 dB, 20 dB, and 30 dB section in the A10 assembly. Total input attenuation with the A9 and the A10 combined is 70 dB in 2 dB steps. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 143: A11 Low Band Switch

    The 1st LO has a frequency range from 3.50 to 9 GHz. The output power is +13 to +18 dBm. In order to maximize the conversion efficiency and avoid LO unlock, sufficient LO power must be supplied. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 144: A13 Rf Front End Assembly

    A13A2 contains the switched filters and LO and IM nulling circuits. A13A1 and A13A2 are not separately replaceable. The entire A13 assembly must be replaced. See Figure 4-1. Figure 4-1 A13 RF Front End Assembly Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 145 — Front End Assembly including switched filter — (Optional) High Band Preamplifier — (Optional) Low Band Preamplifier — (Option EA3) Electronic Attenuator (0-24 dB) Refer to Chapter 5, “Front End Control Troubleshooting.” for detailed descriptions & troubleshooting procedures Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 146: Troubleshooting

    “Quick Check to Verify High Band RF Path” on page 157. If the power level is not within tolerance, press FREQ (Channel), Toggle Swept Span to Zero Span, AMPTD (Y Scale), Attenuation, 10 dB. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 147 Disconnect the W16 cable from A15J902 on the Front End Controller IF IN. The end of W16 cable is easily accessed from the top of the instrument (See Figure 4-2. Figure 4-2 W16 at Front End Controller Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 148 Reconnect the W16 cable to A15J902. Flatness issues or power level problems at other input frequencies below 3600 MHz may exist. This type of problem can be diagnosed using an external source to verify performance Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 149 In order to gain access to the front end components, remove the front frame assembly, but leave the ribbon cable connected so you can still control the instrument. Remove the right side chassis. Refer to the removal procedures in Chapter 15, “Assembly Replacement Procedures.”. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 150: Troubleshooting A Low Band Problem

    Low Band output at W8 is incorrect, suspect the A11 Low Band Switch, the interconnect cables, Switch 3 if Option LNP is present, or the control signals. The control signals are explained in Chapter 5, “Front End Control Troubleshooting”, on page 167. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 151 RF Section Troubleshooting (RF/Microwave Analyzers) Troubleshooting Figure 4-4 RF Section Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 152 Both set to through path −2 −4 −6 A9 set to 2 dB, −8 A10 set to 6 dB −10 −20 −30 −40 −50 −60 A9 set to 4 dB, −70 A10 set to 66 dB Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 153 Connect the measuring spectrum analyzer to the other arm of the splitter. Add the loss through the splitter arm which is 6 dB for the Keysight 11667B splitter. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 154 Boot Up and Initialization Troubleshooting chapter. Viewing the Alignment History file will tell you if other alignment tests failed, and reveal which electronic attenuator steps failed. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 155 Assure you have evaluated all causes before you replace the Front End assembly. If you determine the problem is at a frequency other than 50 MHz, perform the low band flatness adjustment before replacing the Front End assembly. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 156 Low Band second mixer: RF = LO + IF IF = RF − LO LO = RF − IF where RF in this case is the first IF signal (signal at A13A1J11) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 157: Quick Check To Verify High Band Rf Path

    50 MHz. Since several of the same signal path components are shared between high band and low band, determining if the problem appears in both paths is helpful Turn off auto align by pressing System, Alignments, Auto Align, Off. IMPORTANT Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 158 RF Section Troubleshooting (RF/Microwave Analyzers) Troubleshooting Disconnect cable W16 at A15J902, 322.5 MHz output on the A15 Front End Controller. See Figure 4-7. Select Span, 0 Hz. Figure 4-7 A15J902 Location (Options 508, 513, and 526) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 159 1. A11 Low Band Switch 2. A10 Input Attenuator B 3. A9 Input Attenuator A 4. A16 Reference Assembly (4.8 GHz calibrator) 5. A20 YTO 6. A12 YTF Preselector 7. A13 Front End Assembly Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 160 In order to gain access to the front end components, remove the side chassis (1) by removing the eleven screws (2) (0515-0372) and the two screws (3) (0515-1946). See Figure 4-9. Figure 4-9 Remove the Side Chassis Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 161: Troubleshooting A High Band Problem

    If the signal level is incorrect, press AMPTD (Y Scale), Signal Path, uWPath Control, uW Preselector Bypass. If the signal level is now −52 dBm, suspect the A12 YTF is out of adjustment or faulty. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 162 Input/Output, RF Calibrator, Off. If the signal level at the attenuator output is now correct, suspect the A9 Attenuator cal switch or a faulty control signal from the A15 Front End Controller assembly. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 163 Both set to through path −2 −4 −6 A9 set to 2 dB, −8 A10 set to 6 dB −10 −20 −30 −40 −50 −60 A9 set to 4 dB, −70 A10 set to 66 dB Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 164 W20 cable was connected. You might want to use a short flexible semi-rigid cable. Connect the measuring spectrum analyzer to the other arm of the splitter. Add the loss through the splitter arm which is 6 dB for the Keysight 11667B splitter. Figure 4-12 Measuring Setup The signal should be 5122.5 MHz at +7 dBm ±...
  • Page 165 (using the calibration software) will adjust the preamp on, high band path. Assure you have evaluated all causes including A15 Front End Controller switching problems, before you replace the Front End assembly. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 166 Depending on the signal source connected, you may see many “signals” appear on screen because without preselection, the analyzer will display images and multiples. The real input signal should not change amplitude when you switch the uW Preselector Bypass on and off. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 167: Front End Control Troubleshooting

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide Front End Control Troubleshooting What You Will Find in This Chapter The following information is presented in this chapter: 1. Theory of operation of the Front End Control section. 2. Isolating the cause of a hardware problem by verifying the functionality of assemblies of the Front End Control.

  • Page 168: A15 Front End Control Description

    — YTF Tune Ramp — Preselector Tune Out (Provides output voltage, not specified, reserved for future use) — Mixer Bias — Amplifier Bias — Switch Control — Sweep Ramp (reserved for future use) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 169 A15 to Aux IF Output (rear panel) Low Noise Path A15 to SW3 Microwave Preselector Bypass A15 to SW1 and SW2 (Opt 508, 513, or 526) Electronic Attenuator A15 to A13 Figure 5-1 A15 Front View, Physical Connectors Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 170 To A13 J302 Preselector Tune Out N/A (test point only) J300 YTF Bias Control Out To A12 J802 Low Noise Bypass Switch Logic Out To SW3 (Option LNP) J100 Motherboard Connector From A8 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 171: A15 Front End Control Assembly Troubleshooting

    MMCX (f) to MMCX (f) barrel. Huber & Suhner 31_mmcx-50-0-1/111_0E Visit: http://www.hubersuhner.com/de/ie70/hs-index Other standard cables and connectors need to be used to adapt to the voltmeter or the RF input of the functioning spectrum analyzer. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 172: Verifying Input Attenuator A, Input Attenuator B, Low Band Switch Logic And Power Supplies

    4. If the UXA has frequency range option 508, 513, or 526, also connect the Low Band Switch Control Cable, E4410-60160 between A15J700 and J2 of the RF Front End Troubleshooting board. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 173 Front End Control Troubleshooting A15 Front End Control Assembly Troubleshooting Figure 5-3 RF Front End Troubleshooting Board Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 174 7. Turn Auto Align off by pressing System, Alignments, Auto Align, choose Off from the drop-down menu. Resistors on the test board can get very hot. Handle with care. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 175 RF Coupling switch to DC (Direct Coupled) and verify DS14 turns off and DS11 turns on. Set the RF Coupling back to AC. If the LED’s are not toggling correctly, the most probably cause is the A15 Front End Controller. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 176 A15 Front End Control Assembly. Set the input attenuator back to 10 dB by pressing AMPTD, Attenuation, 10 dB on the analyzer. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 177 UXA Low Band switch ribbon cable and the input attenuator ribbon that were originally plugged into the Front End Control board before testing the input attenuator and low band switch logic. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 178: Preselector Tune Output

    Preselector Tune Output Voltages (Option 508, 513, 526) Center Frequency ~ Tune Voltage Valid Frequency (GHz) (VDC) Range Option 1.55 508, 513, 526 10.0 3.12 513, 526 15.0 20.0 6.27 26.0 8.17 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 179: Verifying Sw3 (Option Lnp Only)

    AMPTD, Signal Path, uW Path Control. Standard Path is the default. Select uW Preselector Bypass and you should hear a distinct “click” noise if the control logic from the A15 Front End Control board is getting to SW1 and SW2. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 180: Rf Signal Tracing

    Controller board. This troubleshooting procedure provides the instrument setups to verify options CR3, CRP and ALV. Test the Aux I.F. output based on the options installed in the analyzer. Standard UXA No test to perform. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 181: Verifying Option Cr3

    Connect the Aux I.F. Output on the rear panel to the RF Input of a functioning spectrum analyzer. If the A15 Front End Controller is switching the I.F. correctly, you should measure 322.5 MHz at −35 dBm ±3 dB as per Figure 5-5. Figure 5-5 322.5 MHz Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 182: Verifying Option Crp

    Arbitrary IF Freq and vary the I.F. from 10 MHz to 70 MHz in 500 kHz steps and measure the Aux IF output. The amplitude level should remain fairly flat across the entire arbitrary IF output range. Figure 5-6 70 MHz Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 183: Verifying Option Alv

    Reduce source output power to −20 dBm. Signal should now appear one division lower, and voltmeter should measure approximately 1.3 VDC. Reduce source output power to −30 dBm. Signal should now appear one division lower, and voltmeter should measure approximately 1.0 VDC. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 184 Front End Control Troubleshooting A15 Front End Control Assembly Troubleshooting Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 185: Analog/Digital If Troubleshooting

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide Analog/Digital IF Troubleshooting What You Will Find in This Chapter The following information is presented in this chapter: 1. Theory of operation of the IF section. 2. Isolating the cause of a hardware problem by verifying the functionality of assemblies in the IF section signal path.

  • Page 186: A2 Analog If Assembly Description

    LO Input (300 MHz signal from A16 Reference Assembly) 22.5 MHz Cal Comb Signal (from the A3 Digital IF Assembly) Outputs from the A2 22.5 MHz signal (to A3 Digital IF Assembly) RF Trigger Detector (to A3 Digital IF Assembly) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 187: A2 Analog If Assembly Theory Of Operation

    22.5 MHz cal comb signal from the A3 Digital IF to allow calibration of the prefilters and overall passband phase and amplitude. The signal is attenuated by 20 dB if necessary. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 188 The through path is used when the analyzer Res BW setting is 430 kHz and greater in analyzer swept mode. In IQ Analyzer mode or in Spectrum Analyzer mode with Sweep Type of FFT, the analyzer span setting determines the pre-filter settings. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 189 The Burst Carrier Trigger detector provides a binary signal to be used as a trigger based on the presence of an RF input signal or not. The variable gain amplifiers drive a detector and its output drives a comparator which generates the trigger signal. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 190: A2 Analog If Troubleshooting

    UXA is set to 10 dB. Look near the top of the display near the center and verify that Atten: 10 dB is visible. If needed change the input attenuator by pressing AMPTD, Attenuation, 10 dB on the analyzer. 10.Press Input/Output, RF Calibrator, 10 MHz. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 191 A15 RF Front End Control Assembly 12.Connect A15J900 to a functioning spectrum analyzer using the appropriate MMCX connectors and cables. 13.Press Freq, 322.5 MHz, Span, 1 MHz, Peak Search on the functioning spectrum analyzer. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 192 A15J900. Since the W25 cable connects from this output to the input of the Analog I.F. assembly at A2J100, the small coaxial cable has not been tested at the A2J100 end. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 193: Verifying The 22.5 Mhz Output Power

    Atten: 10 dB is visible. If needed change the input attenuator by pressing AMPTD, Attenuation, 10 dB on the analyzer. 9. Referring to Figure 6-3, carefully disconnect the W42 cable at A3J19. Figure 6-3 A3 Digital IF Cables Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 194 14.If the 22.5 MHz signal is within tolerance, carefully reconnect the W42 cable to A3J19. You should hear a distinct snap when reconnecting the W42 cable. If this cable is not installed properly, intermittent signal fluctuations may occur on the analyzer display. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 195: Verifying The 300 Mhz Lo Input Power From The A16 Reference Assembly

    SMA adapter to the RF input of a functioning spectrum analyzer. 3. Press Freq, 300 MHz, Span, 1 MHz, Amplitude, 10 dBm, Peak Search on the functioning spectrum analyzer. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 196 A16 Reference Assembly troubleshooting section in this service guide. 6. If the 300 MHz LO is measuring the correct power level and frequency and the 22.5 MHz signal is low, the most probable cause is the A2 Analog IF assembly. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 197: A3 Digital If Assembly Description

    — Noise Source Control — Dither for final I.F — Provides the alignment sequence generator for wide band alignments — Provides wide band Comb Calibration Signal — Trigger interpolation and associated alignment Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 198: A3 Digital If Assembly Theory Of Operation

    +10 dBm. The signal goes through a 10 MHz to 30 MHz tripler. A 0 to 5V, 10 MHz square wave is generated. Capacitors form a single-pole band pass filter to select the 3rd harmonic, 30 MHz. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 199 Messenger or LVDS. The implementation on the Digital IF is unidirectional, meaning it can only source data, not receive it. Common mode filtering is required to translate the digital ground referenced signals to analog ground at the rear panel. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 200: A3 Digital If Troubleshooting

    UXA is set to 10 dB. Look near the top of the display near the center and verify Atten: 10 dB is visible. If needed change the input attenuator by pressing AMPTD, Attenuation, 10 dB on the analyzer. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 201 Use an appropriate cable to go from the SMA connector to the RF input of a functioning spectrum analyzer to verify the 22.5 MHz I.F. signal frequency and amplitude is correct. 12.Press Freq, 22.5 MHz Span, 1 MHz, Peak Search on the functioning spectrum analyzer. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 202 14.If the 22.5 MHz signal is not measuring the correct power level, see “A2 Analog IF Troubleshooting” on page 190 in this service guide. 15.If the 22.5 MHz signal is within tolerance, carefully reconnect the W42 cable to A3J19. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 203: Verifying The 250 Mhz If Input Power (Option B40 Only)

    Atten: 10 dB is visible. If needed change the input attenuator by pressing AMPTD, Attenuation, 10 dB on the analyzer 10.Referring to Figure 6-11, carefully disconnect W26 from A3J15. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 204 RF input of a functioning spectrum analyzer to verify the 250 MHz I.F. signal frequency and amplitude is correct. 12.Press Freq, 250 MHz, Span, 1 MHz, Peak Search on the functioning spectrum analyzer. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 205 15.If the 250 MHz signal is within tolerance, carefully reconnect the W26 or W40 cable to A3J15. You should hear a distinct snap when reconnecting the cable. If this cable is not installed properly, intermittent signal fluctuations may occur on the analyzer display. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 206: Verifying The 100 Mhz Reference Input

    100 MHz reference frequency and amplitude is correct. 9. Press AMPTD, Ref Level, 20 dBm, Freq, 100 MHz, Span, 1 MHz, Peak Search on the functioning spectrum analyzer. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 207 Digital IF or the A4 CPU. It is difficult to separate these two assemblies given the architecture of the analyzer. Each assembly will have to be tried to see which one is causing the failure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 208 Analog/Digital IF Troubleshooting A3 Digital IF Troubleshooting Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 209: Lo Synthesizer/Reference Troubleshooting

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide LO Synthesizer/Reference Troubleshooting What You Will Find in This Chapter Content coming soon.
  • Page 210 LO Synthesizer/Reference Troubleshooting What You Will Find in This Chapter Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 211: What You Will Find In This Chapter

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide CPU/Disk Drive Troubleshooting What You Will Find in This Chapter The following information is presented in this chapter: 1. Theory of operation of the Processor section. 2. Isolating the cause of a hardware problem by verifying the functionality of assemblies in the Processor section.

  • Page 212: A4 Processor Description

    A4 Processor assembly. When the front panel power switch is pressed the A4 Processor assembly tells the A6 Power Supply assembly to turn on. Once the +12V D, +5.1V D, and +3.35V D supplies are all on and within Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 213: Rear Panel Connectivity

    — 1 x High Speed USB 2.0 Host Port — DisplayPort Video Output — VGA Output — SD Memory Card Slot (Accessible only when A5 disk drive is removed) Figure 8-1 A4 Processor Assembly Rear Panel Connectivity Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 214: System Memory

    A5 disk drive assembly has been changed and the calibration database needs to be transferred to it. The SD memory card is field replaceable. See Chapter 14, “Replaceable Parts” for the correct replacement part number. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 215: A4 Processor Assembly Troubleshooting

    Accessing BIOS Setup Utility To easily navigate the BIOS Setup Utility you will want to have an external USB keyboard connected to the instrument. Then, when the initial Keysight Technologies splash screen is displayed at power-up, press the key on the keyboard specified on the initial boot screen (typically the DEL key).

  • Page 216: A5 Disk Drive Description

    For information on how to backup this data see the “Calibration Data Backup and Restore” section in Chapter 16, “Post-Repair Procedures.”. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 217: Drive Partitioning

    Data saved in this partition will not be lost if the Instrument Image Recovery process is run. E.This partition is reserved for Keysight's use. The primary use of the E: partition is for storing of the instrument calibration and alignment data. Do not change or overwrite the files on this partition. This could cause your instrument to not meet specifications, or even to stop functioning properly.

  • Page 218: Instrument Image Recovery System

    The same is true for the instrument calibration database since it resides on the E: partition. To restore the C: drive using the image stored in this recovery partition see the section titled “Disk Drive Recovery Process” on page 220. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 219: A5 Disk Drive Troubleshooting

    This procedure will not affect the instrument's calibration or user files. If this does not resolve the boot issue, or the instrument never boots the operating system proceed to the “Disk Drive Recovery Process”. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 220: Disk Drive Recovery Process

    Using the Instrument Image Recovery System 1. Make sure the instrument is turned off 2. Turn on the instrument 3. After the "Keysight Technologies" screen is displayed the Windows Boot Manager screen as shown in Figure 8-2 will be displayed for 5 seconds...

  • Page 221: Replacing The Instrument Disk Drive

    If the above two procedures did not resolve the booting issue, the disk drive should be replaced. Please refer to the “A4 CPU/A5 Solid State Drive” replacement section in Chapter 15, “Assembly Replacement Procedures.”. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 222 CPU/Disk Drive Troubleshooting A5 Disk Drive Troubleshooting Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 223: Power Supply/Midplane Troubleshooting

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide Power Supply/Midplane Troubleshooting What You Will Find in This Chapter The following information is presented in this chapter: 1. Theory of operation of the Power Supply/Midplane section. 2. Isolating the cause of a hardware problem by verifying the functionality of assemblies in the Power Supply and Midplane sections.

  • Page 224: A6 Power Supply Description

    AC power input connector and then reconnected. The power supply assembly plugs into the A7 Midplane Assembly from the rear of the instrument. (see Figure 9-1.) Figure 9-1 Power Supply Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 225: Power Supply Theory Of Operation

    +12 Volt Digital Supply DCOM +5.1VD +5.1 Volt Digital Supply DCOM +5.1VSB +5.1 Volt Standby Supply DCOM +3.35VD +3.35 Volt Digital Supply DCOM FAN_P Fan Positive Supply FAN_N FAN_N Fan Negative Supply FAN_P Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 226 The A6 Power Supply has no user replaceable fuse. While there is a fuse internal to the supply this is not meant for field replacement. If the internal fuse is blown, the power supply has experienced a major failure and should be replaced. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 227 The A6 Power Supply assembly will protect itself by shutting down if it overheats. It will also reset itself with no user interaction after the temperature is reduced by approximately 10 degrees C. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 228: A6 Power Supply Assembly Troubleshooting

    PS_ONn is a signal that when pulled low tells the A6 Power Supply assembly to turn on all of its outputs. This signal comes from the A4 Processor board assembly and is initiated by pressing the front panel power button. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 229: Status Outputs

    If this output is not at a TTL high level the A6 Power Supply assembly will not turn its non-standby power supplies on, no matter what the A4 Processor assembly tells it to do. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 230: A7 Midplane Board Assembly Description

    A6 Power Supply Assembly A23 Wideband Digital I.F. (Opt B5X) A6 Power Supply Assembly A1A2 Front Panel Interface A6 Power Supply Assembly J921 A24 Motherboard Interconnect A6 Power Supply Assembly J920 A24 Motherboard Interconnect Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 231 Power Supply/Midplane Troubleshooting A7 Midplane Board Assembly Description Figure 9-2 A7 Midplane Board Assembly Connections, LED’s, and Test Points - Rear View Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 232 Power Supply/Midplane Troubleshooting A7 Midplane Board Assembly Description Figure 9-3 A7 Midplane Board Assembly Connections, LED’s, and Test Points - Front View Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 233: A7 Midplane Board Assembly Troubleshooting

    If for some reason the level of the power supply related interference is higher than normal this circuitry, or the A6 Power Supply assembly, could be suspect. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 234 ACOM Green TP21 -5.2 ± 0.75 PSFAULT_L Power Supply Fault ACOM not measurable PSFAULTn DCOM Digital Common PWR_OK Digital Supplies OK DCOM not measurable PS_ONn Power Supply Enable DCOM Green not measurable Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 235: 10 Front Panel/Motherboard Troubleshooting

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide 10 Front Panel/Motherboard Troubleshooting What You Will Find in This Chapter Content coming soon.
  • Page 236 Front Panel/Motherboard Troubleshooting What You Will Find in This Chapter Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 237: 11 Hardware Options

    A current list of all instrument options and retrofit requirements is available on the Keysight web site for the UXA signal analyzer at: http://www.keysight.com/find/UXA_upgrades Table 11-1...
  • Page 238 License and additional hardware This chapter Y-Axis Output License Only Chapter 6, “Analog/Digital IF Troubleshooting.” Chapter 12, “Block Diagrams.” for information on how these hardware options are installed in the signal path. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 239: A21 Wideband Analog If Troubleshooting

    750 MHz. If the analyzer is using the Option B5X, 510 MHz Path, the signal at J17 will be 877.148 MHz. Both of these IF signal frequencies are processed through the A21 Wideband Analog IF assembly. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 240 Figure 11-1 Analog IF Block Diagram...

  • Page 241: A21 Wideband Analog If Assembly Theory Of Operation

    Manually troubleshoot the assembly is basically verifying the proper IF signal at J17 is present and at the proper level. In addition you will want to verify input and output levels of the various calibration and reference signals. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 242: A21 Wideband Troubleshooting

    Peak Search on the analyzer. The marker readout should be 50 MHz at −25 dBm ±3 dB. See Figure 11-2. If this reference signal is measuring incorrectly, see Chapter 4, “RF Section Troubleshooting (RF/Microwave Analyzers)” in this service guide. Figure 11-2 50 MHz Signal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 243 Chapter 4, “RF Section Troubleshooting (RF/Microwave Analyzers)” in this service guide. 9. Connect a known good spectrum analyzer to A21J3. Verify reference signal at 2400 MHz at a level of + 9 dBm. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 244 Hardware Options A21 Wideband Analog IF Troubleshooting Figure 11-3 2400 MHz Signal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 245: A22 Wideband Digital If Troubleshooting

    Wideband 255 MHz or 510 MHz path. Press Mode Setup, IF Path, 40 MHz. If the signal is now present, there is a likely failure of the A22 Wideband Digital IF or the A21 Wideband Analog IF Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 246: Option Rts, Real-Time I/Q Data Streaming

    The instrument must have the following options installed: — N9040B-RT1 or N9040B-RT2, Real Time Analysis — N9040B-RTS Real Time Data Streaming Press System, Show System and verify the options listed above are present. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 247: Functionality Check

    However if the instrument can complete the power on tests and alignments without an error, and you perform the functionality test above, Option RTS should be working correctly. Figure 11-4 Option RTS Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 248: Option H1G, 1 Ghz Analysis Bandwidth Assembly

    The entire assembly must be replaced because the interconnections are difficult to remove/attach and troubleshooting the individual board assemblies is very difficult due to packaging constraints and lack of test points. Therefore the entire assembly must be replaced. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 249 Hardware Options Option H1G, 1 GHz Analysis Bandwidth Assembly Figure 11-5 Option H1G Block Diagram Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 250: Operation And Verification

    Set the analyzer center frequency to 4.8 GHz and the calibrator signal should appear on screen at about -28 dBm if the 1 GHz path is working correctly. See Figure 11-6. Figure 11-6 4.8 GHz Calibrator Signal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 251 Set up the measuring spectrum analyzer as shown in Figure 11-7. Notice the 750 MHz signal measures -10 dBm. Figure 11-7 Spectrum Analyzer Connected to Rear Panel IF 2 Out Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 252: Advanced Troubleshooting

    UXA). Set the measuring signal analyzer to the setting shown in Figure 11-7. The signal amplitude at 750 MHz should be about -40 dBm as shown in Figure 11-8. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 253 5. Assure the 100 MHz reference signal at about 13 dBm is present at the A16 Reference Assembly J706. 6. Measure IF2 Out on rear panel. Press Input/Output, Output, IF 2 Out and select On. The 750 MHz signal level should be about -20 dBm. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 254 50 GHz UXA with Option B5X, and notice SW4, the BPF, and SW5. If the measurement at input frequency 1 GHz is incorrect, but the 5 GHz (or greater) input frequency measurement is correct, suspect a fault with the switches or band pass filter. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 255: What You Will Find In This Chapter

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide 12 Block Diagrams What You Will Find in This Chapter The following block diagrams are found in this chapter: RF Lowband Path (Options 508, 513, 526) Block Diagram RF Highband Path #1 (Options 508, 513, 526) Block Diagram...

  • Page 256: Block Diagrams

    Block Diagrams Block Diagrams Block Diagrams Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 257 UXA RF BLOCK DIAGRAM (Options 508, 513, 526) (Lowband Path - Input signals 3 Hz to 3.599 GHz) A15 FRONT END CONTROLLER J800 ATTENUATOR CONTROL J802 LOW BAND SWITCH BYPASS CONTROL J700 LOW BAND SWITCH CONTROL (Option MPB) (Option MPB) J801 PRESELECTOR BYPASS CONTROL 6 dB...
  • Page 258 UXA RF BLOCK DIAGRAM (Options 508, 513, 526) (Highband Path #1 - Input signals 3.6 to 13.6 GHz) A15 FRONT END CONTROLLER J800 ATTENUATOR CONTROL J802 LOW BAND SWITCH BYPASS CONTROL J700 LOW BAND SWITCH CONTROL (Option MPB) (Option MPB) J801 PRESELECTOR BYPASS CONTROL 6 dB...
  • Page 259 UXA RF BLOCK DIAGRAM (Option 526) (Highband Path #2 - Input signals 13.6 GHz to 26.5 GHz) A15 FRONT END CONTROLLER J800 ATTENUATOR CONTROL J802 LOW BAND SWITCH BYPASS CONTROL J700 LOW BAND SWITCH CONTROL (Option MPB) (Option MPB) J801 PRESELECTOR BYPASS CONTROL 6 dB J300...
  • Page 260 UXA RF BLOCK DIAGRAM - Option B5X (Options 508, 513, 526) (Lowband Path - Input signals 3 Hz to 3.599 GHz) A15 FRONT END CONTROLLER J800 ATTENUATOR CONTROL J802 LOW BAND SWITCH BYPASS CONTROL J700 LOW BAND SWITCH CONTROL (Option MPB) (Option MPB) J801 PRESELECTOR BYPASS/B5X FILTER CONTROL...
  • Page 261 UXA RF BLOCK DIAGRAM - Option B2X (Options 544, 550) (Highband Path - Input signals 3.6 GHz to 17.1 GHz) A15 FRONT END CONTROLLER J800 ATTENUATOR CONTROL J802 LOW BAND SWITCH BYPASS CONTROL J700 LOW BAND SWITCH CONTROL SWITCH 3 SWITCH 6 (Option LNP) (Option MPB)
  • Page 262 UXA RF BLOCK DIAGRAM - Option B5X (Options 544, 550) (Highband Path - Input signals 3.6 GHz to 17.1 GHz) A15 FRONT END CONTROLLER J800 ATTENUATOR CONTROL J802 LOW BAND SWITCH BYPASS CONTROL J700 LOW BAND SWITCH CONTROL SWITCH 3 SWITCH 6 (Option LNP) (Option MPB)

  • Page 263: Analog If Block Diagram

    Block Diagrams Block Diagrams Analog IF Block Diagram Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 264: Digital If Block Diagram

    Block Diagrams Block Diagrams Digital IF Block Diagram Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 265: 13 Service And Diagnostics Menus

    System Settings Diagnostic menu and Spectrum Analyzer mode Measure Setup menu. The Service capabilities are intended for field service technicians. These technicians may be at a Keysight Service Center or at a self-maintaining customer site. There are two types of Service capabilities: 1.

  • Page 266: Controlling Access

    2. “Secure service access” to the Service menu. This prevents the casual user from accessing and using these features. It is intended to provide this access to Keysight Service Centers or any customer who purchases the Service Guide. The “Service Functions” type of Service capability is defined above.
  • Page 267 Service and Diagnostics Menus Overview Figure 13-2 Secure Service Menus (Accessed via System->Service) Figure 13-3 Lock and LO (Accessed via Spectrum Analyzer Mode -> Meas Setup -> Lock and LO) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 268 Service and Diagnostics Menus Overview Figure 13-4 Diagnostics (Hardware Statistics) (Accessed via System -> Diagnostics) Figure 13-5 Service Diagnostics (Corrections Menu) (Accessed via Spectrum Analyzer Mode -> Meas Setup -> Service Diagnostics) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 269: Service Key Descriptions

    The adjustment is performed by changing the DAC setting controlling the reference. Once the reference is adjusted to the proper frequency, the DAC value can be saved in non-volatile memory by pressing the Save menu key. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 270: Alignments

    A failure of ADC will set the Error Condition “Align ADC failed”. A failure will not employ new ADC alignment data. Successful completion of ADC will clear the Error Condition “Align ADC failed”. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 271 The Advisory Event “Alignment complete” is displayed when the alignment is complete. Align IF can be interrupted by pressing the Cancel (ESC) front-panel key. When this occurs, no new IF alignment data will be employed. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 272 The instrument will stop any measurement currently underway, perform the alignment, and then restart the measurement from the beginning (similar to pressing the Restart key). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 273 Service and Diagnostics Menus Service Key Descriptions Show Software The Show Software screen displays revision information for Keysight internal software that comprises the embedded application and programmable hardware devices (FPGAs and PLDs). (The Show Software screen is not implemented in A.15.xx software)

  • Page 274: Corrections

    The example spectrum below shows the effect of turning off RF Flatness Video. The yellow trace shows RF Flatness Video shift on, and the Blue trace shows RF Flatness Video shift off. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 275 Control is available to set the state of LO Feedthru nulling ON or OFF. In the ON state, the software will determine when it is appropriate to null the LO Feedthru. LO nulling is only available in low band. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 276 Control is available to set the state of Intermod Nulling On or OFF. In the ON state, the software will determine when it is appropriate to null the intermodulation products. IM nulling is only available in low band. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 277: Band Lock

    Locks the analyzer to Band 4. Band 5 Locks the analyzer to Band 5. Band 6 Locks the analyzer to Band 6. The Band 6 key label can be different depending on which option is installed. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 278: Lo Band Lock

    Locks the analyzer to LO Band 0. Band 1 Locks the analyzer to LO Band 1. Band 2 Locks the analyzer to LO Band 2. Band 3 Locks the analyzer to LO Band 3. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 279: Low Noise Path

    EXT MIXER connector. External LO Turnoff Disconnects the 1st LO path which will minimize the effect of the 1st LO signal at the front panel EXT MIXER connector. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 280: Front Panel Key Test

    The screen will display a series of lines. For each blue line, trace along the line with your finger to draw a matching line. Lines that deviate significantly from the blue trace line (i.e beyond the gray lines) will be marked in red. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 281: 14 Replaceable Parts

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide 14 Replaceable Parts What You Will Find in This Chapter The following information is found in this chapter: 1. Part number tables for assemblies, mechanical parts, cables, front panel connectors, and labels.
  • Page 282 338 Figure 14-29, “Fan Hardware,” page 341 Figure 14-30, “Input Connector,” page 342 Figure 14-31, “Front Frame Parts - Shield Removed,” page 343 Figure 14-32, “Front Frame Exploded View,” page 344 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 283: How To Order Parts

    — Description of where the part is located, what it looks like, and its function (if known) — Quantity required For a list of Keysight Technologies sales and service office locations, refer to “Contacting Keysight Technologies” on page Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 284: Replaceable Parts

    Front Panel Controller Board with speaker N9040-63012 A1A6 Front Panel On-Button Keyboard N9040-63016 A1MP1 Main Keypad light color N9040-40003 dark color N9040-40009 A1MP2 Front Panel On-Button Keypad light color N9040-40004 dark color N9040-40010 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 285 Cable Assembly, DC-DC Converter to Display and Controller Board N9040-60029 A1W4 Cable Assembly, On/Off Keyboard to Front Panel Controller Board N9040-60026 Analog IF Assembly N9020-60290 Digital IF Assembly N9020-60016 A3W1 Cable Assembly, Smart Noise Source (Wire Harness) N9020-60090 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 286 33325-60020 Low Band Switch Assembly Options 508, 513, 526 E4410-60121 Options 544, 550 N9020-60051 YTF Preselector Options 508, 513, 526 5087-7382 Options 544, 550 5087-7383 A12MP1 Gap Pad for A12 mounting 5022-7179 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 287 7.2 GHz Bandpass Filter (connects to A14) 9135-6218 5.675 GHz Bandpass Filter (Option B5X) 9135-6217 Type-N Input Connector Assembly N9039-60030 2.4 mm Input Connector Assembly N9030-60011 3.5 mm Input Connector Assembly (Option C35) N9020-60196 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 288 Option RTS is not installed. Bracket, Motherboard (Front/Horizontal mount) s/n prefix < 5605 Options 508, 513, 526 N9040-00024 s/n prefix ≥ 5605 and all Options 544 and 550 N9040-00051 Bracket, Chassis Front N9040-00005 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 289 Bracket, SW1 & SW2 Main N9040-00017 Bracket, Transfer Switches (Option 544, 550) N9040-00028 Bracket, FL2 Bandpass Filter (Option B5X) N9020-00054 Bracket, SW4 & SW5 switch covers (Option B5X) N9020-00055 Bracket, Base (Option B5X) N9020-20236 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 290 ≥ 5605 and all Options 544 and 550 N9040-00049 Bracket, "T" shape to Top Brace Front N9040-00034 Spiral Wrap; 0.250 IN OD; 0.160 IN ID; for Digital IF cables 0890-0025 Plug hole, Nylon, for 0.5 D hole 6960-0149 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 291 N5245-40001 dark color N9040-40007 Impact Cover, Rear light color N5245-40002 dark color N9040-40008 Front Frame Handles light color 5023-1399 dark color 5023-3074 ESD Cap, RF Input Connector (Std & Option C35) 1401-0247 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 292 Cable, Semi-rigid, Switch 1 port 2 to YTF In N9040-20033 Cable, Wire harness, A12J1, YTF to A15J300, Front End Controller N9040-60033 Wire harness, Switch 1/2 to A15J801, Front End Controller N9040-60039 Wire harness, 4 Switch Control (Option B5X) N9040-60031 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 293 Options 508, 513, 526 8121-1940 Options 544, 550 8121-2608 Cable, Semi-rigid, A16J703, Reference Assembly to FL1, 7.2 GHz Bandpass Filter N9040-20040 Cable, Semi-rigid, A14J35002, L.O. Synthesizer Assembly to FL1, 7.2 GHz Bandpass N9020-20226 Filter Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 294 Cable, Semi-rigid, A10, Input Attenuator B to SW3 port 1, Transfer Switch Options 508, 513, 526 N9040-20028 Options 544, 550 N9040-20104 Cable, Semi-rigid, SW3 port 4, Transfer Switch to A11J1, Low Band Switch Options 508, 513, 526 N9040-20031 Options 544, 550 N9040-20106 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 295 N9040-20110 Cable, Semi-rigid, Switch 6, port 2 to A13A1J9 (Options 544, 550) N9040-20111 Cable Assembly (flex circuit), A22 WBDIF J9000 to A28 WBDIF Extension Board J1 N9040-60047 (Option RTS with Option B2X) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 296 Cable, Semi-rigid, Rear Panel jumper between IF 2 OUT and IF 2 IN N9040-20065 s/n < US57212008 (Option H1G) a. Does not include nameplate, See A1MP3 through A1 MP8 and A1MP20 through A1MP22. b. A13 contains A13A1 & A13A2. They are not sold separately. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 297 Table 14-2 Attaching Hardware Attach Part Number Type Tool Torque Analog IF Digital IF 0515-0372 M3 X 0.5 Torx T-10 9 inch-lbs (8 mm long) Attenuators Attenuator Bracket 2 per 0515-0372 M3 X 0.5 Torx T-10 9 inch-lbs (8 mm long) Attenuator Bracket Chassis 2 per...
  • Page 298 Table 14-2 Attaching Hardware Attach Part Number Type Tool Torque Digital I.F. Board Plate Digital I.F. Board 2190-0068 Washers 2950-0054 Nuts 5/8-inch 21 inch-lbs socket Digital I.F. Board Plate Digital I.F. Board Plate 0515-1940 M3 X 0.45 Torx T-8 6 inch-lbs LVDS Connector (6 mm long) Display...
  • Page 299 Table 14-2 Attaching Hardware Attach Part Number Type Tool Torque Front Frame Handles Front Frame 0515-2044 M4 X 0.7 Torx T-20 21 inch-lbs (10 mm long) Front Panel Controller Board Front Frame 0515-0372 M3 X 0.5 Torx T-10 9 inch lbs. (8 mm long) Front Panel Controller Board Front Frame...
  • Page 300 Table 14-2 Attaching Hardware Attach Part Number Type Tool Torque Chassis Sides Rear Motherboard Bracket 0515-0372 M3 X 0.5 Torx T-10 9 inch-lbs (Left & Right) (8 mm long) New Chassis 0515-0433 M4 X 0.7 Torx T-20 21 inch-lbs (8 mm long) Cable Clamp (Fan) Fan Bracket 0515-0372...
  • Page 301 Table 14-2 Attaching Hardware Attach Part Number Type Tool Torque Rear Brace Chassis Side 0515-0372 M3 X 0.5 Torx T-10 9 inch-lbs (Left & Right) (8 mm long) Wideband Digital I.F. Assembly 0515-1946 M3 X 0.5 Torx T-10 9 inch-lbs (6 mm long) H1G Assembly (Option H1G) 0515-1946...
  • Page 302 Table 14-2 Attaching Hardware Attach Part Number Type Tool Torque Top Brace (Front/Holes) Chassis 0515-0372 M3 X 0.5 Torx T-10 9 inch-lbs (8 mm long) Chassis & PCB Assemblies 0515-1946 M3 X 0.5 Torx T-10 9 inch-lbs (6 mm long) Chassis (Left &...
  • Page 303 Table 14-2 Attaching Hardware Attach Part Number Type Tool Torque Wideband Analog I.F. Assembly Wideband Analog I.F. Assembly 0515-0433 M4 X 0.7 Torx T-20 21 inch-lbs Ejector (Left & Right) (8 mm long) Wideband Analog I.F. Assembly Wideband Analog I.F. Assembly 3050-0893 Washer Ejector (Left &...

  • Page 304: Hardware

    Replaceable Parts Hardware Figure 14-1 Major Assemblies Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 305 (Options B2X and B5X) A14 L.O. Synthesizer Assembly N9020-60227 A21 Wideband Analog I.F. Assembly N9020-60043 A16 Reference Assembly N9020-60187 A15 Front End Controller N9020-60295 A27 H1G Assembly (Option H1G) N9040-60102 (not compatible with Option B5X) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 306 Replaceable Parts Figure 14-2 External Hardware Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 307 Rear Feet light color 5041-9611 dark color 5041-7903 Dress Cover light color N9040-00015 dark color N9040-00046 Bottom feet light color 5041-9167 dark color 5041-7906 Front Frame Handles light color 5023-1399 dark color 5023-3074 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 308 Top Brace Front card cage (with holes) s/n prefix < 5605 Options 508, 513, 526 N9040-00010 s/n prefix ≥ 5605 and all Options 544 and 550 N9040-00055 Screw 0515-0372 3, 4, 6, 7 Screw 0515-1946 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 309 Replaceable Parts Figure 14-4 RF Area (Options 508, 513, 526) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 310 A11 Low Band Switch Assembly E4410-60121 SW3 Transfer Switch Assembly 87222-60026 SW1 and SW2 Coax Switches N1810-60069 J1 RF Input Connector Type-N N9039-60030 3.5 mm (Option C35) N9020-60196 A12 YTF Preselector 5087-7382 A20 YTO N9020-60009 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 311 Figure 14-9 for locations of RF area cables for Options 508, 513, and 526. Figure 14-5 RF Area Cables (Options 508, 513, 526) Figure 14-6 Low Band Switch Cables (Options 508, 513, 526) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 312 Replaceable Parts Figure 14-7 MPB/LNP Cables (Options 508, 513, 526) Figure 14-8 RF Front End Cables (Options 508, 513, 526) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 313 Replaceable Parts Figure 14-9 RF Front End Side Cables (Options 508, 513, 526) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 314 Cable, Semi-rigid, SW3 port 2, Transfer Switch to SW1 port C, Coaxial N9040-20029 Switch (Options 508, 513, 526) Cable, Semi-rigid, SW3 port 3, Transfer Switch to A11J3, Low Band Switch N9040-20030 Cable, Semi-rigid, A13A2J3, Switched Filter Assembly to A13A2J4, N9020-20080 Switched Filter Assembly Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 315 Cable, Semi-rigid, SW5 Port C, Coaxial Switch to A13A1J11, R.F. Front End N9020-20265 Assembly Cable, Semi-rigid, A13A1J10, R.F. Front End Assembly to SW4 Port C, N9020-20266 Coaxial Switch (Option B5X) Cable, Semi-rigid, A13A1J3, R.F. Front End Assembly to A13A2J6 part of A13 Assembly Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 316 Replaceable Parts Figure 14-10 RF Area (Options 544, 550) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 317 Option B5X (Options 544, 550) N9020-60218 A11 Low Band Switch Assembly N9020-60051 SW3 Transfer Switch Assembly 87222-60029 SW6 Transfer Switch Assembly 87222-60031 J1 RF Input Connector 2.4 mm N9030-60011 A12 YTF Preselector 5087-7383 A20 YTO N9020-60009 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 318 Figure 14-13 for locations of RF area cables for Options 544 and 550. Figure 14-11 RF Area Cables (Options 544, 550) Figure 14-12 RF Front End Cables (Options 544, 550) (Option B5X shown) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 319 Replaceable Parts Figure 14-13 RF Front End Side Cables (Options 544, 550) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 320 (Option B5X) Cable, Semi-rigid, FL2, Bandpass Filter Out to SW5 Port 1, Coaxial Switch N9020-20269 (Option B5X) Cable, Semi-rigid, SW5 Port 2, Coaxial Switch to A13A2J5 R.F. Front End N9020-20264 Assembly (Option B5X) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 321 Cable, Semi-rigid, Switch 6, port 4 to A12 YTF input (Options 544, 550) N9040-20109 Cable, Semi-rigid, Switch 6, port 3 to A12 YTF output (Options 544, 550) N9040-20110 Cable, Semi-rigid, Switch 6, port 2 to A13A1J9 (Options 544, 550) N9040-20111 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 322 Card Cage Boards Table 14-10 Card Cage Boards Item Description Keysight Part Number A15 Front End Controller N9020-60295 A16 Reference Assembly N9020-60187 A21 Wideband Analog I.F. Assembly N9020-60043 A14 L.O. Synthesizer Assembly N9020-60227 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 323 End Controller Options 508, 513, 526 N9040-60036 Options 544, 550 N9040-60066 Cable, Wire harness, A12J1, YTF to A15J300, Front End N9040-60033 Controller Wire harness, Switch 1/2 to A15J801, Front End Controller N9040-60039 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 324 Cable, Coax, Ext Ref In Rear Panel to A16J704, Reference 8121-1863 Assembly Cable, Coax, A16J716, Reference Assembly to A3J14, Digital 8121-1861 I.F. Assembly Cable, Coax, A15J901, Front End Controller to A21J17, 8121-1401 Wideband Analog I.F. Assembly (Options B2X and B5X) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 325 Item Description Keysight Part Number Cable, Coax, A21J1, Wideband Analog I.F. Assembly to 8121-0152 A16J726, Reference Assembly (Options B2X and B5X) Cable, Ribbon, SW3, Transfer Switch to A15J802, Front End N9040-60038 Controller Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 326 Options 508, 513, 526 N9040-20038 Options 544, 550 N9040-20112 Cable, Ribbon, A14J8, L.O. Synthesizer to A20, YTO N9040-60035 Control Cable, Semi-rigid, A14J35002, L.O. Synthesizer N9020-20226 Assembly to FL1, 7.2 GHz Bandpass Filter Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 327 A3 Digital I.F. Assembly N9020-60016 Screw, M3 X 0.5 (8 mm long) 0515-0372 Cable, Ribbon, A2J820, Analog I.F. Assembly to A3J20 N9020-60046 Digital I.F. Assembly A3W1 Cable Assembly, Smart Noise Source (Wire Harness) N9020-60090 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 328 Replaceable Parts Figure 14-18 AIF Cables Figure 14-19 DIF Cables Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 329 A3J15, Digital I.F. Assembly (Options B2X and B5X) Cable, Coax, A2J601, Analog I.F. Assembly to A3J19, 8121-2607 Digital I.F. Assembly Cable, Coax, A3J17, Digital I.F. Assembly to A16J726, 8121-1401 Reference Assembly (No Options B2X or B5X) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 330 Description Keysight Part Number A4 CPU Assembly N9020-60247 A4BT1 CPU Battery 1420-0356 (CR2032) A4A1 Disk Drive Interconnect Board W1312-63079 Screw M3 x 0.5 (8 mm long) 0515-0372 A4A2 SD Memory Card 1819-1250 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 331 A5MP2 Disk Drive Rear Panel W1312-00103 A5MP3 Disk Drive Assembly Handle 1440-0421 Screw M3 x 0.5 (8 mm long) 0515-1035 Screw M2.5 x 0.45 (5 mm long) 0515-2219 Screw M3 x 0.5 (6 mm long) 0515-1227 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 332 A2 Narrowband Analog I.F. & N9020-60290 A3 Narrowband Digital I.F. Assembly N9020-60016 A4 CPU Assembly N9020-60247 A6 Power Supply 0950-5748 A22 & A23 Wideband Digital I.F. Assemblies N9020-60311 (Options B2X and B5X) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 333 Replaceable Parts Figure 14-23 Wideband I.F. Ribbon Cables Figure 14-24 Wideband I.F. Cables Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 334 Interconnect Bracket WBDIF (Options B2X and B5X) Cable, Ribbon, WBDIF Interconnect Bracket to A22J778, N9040-60045 Wideband Digital I.F. (Option B2X) Cable, Ribbon, WBDIF A22J778 to WBDIF A21J778 to N9040-60041 WBDIF Interconnect Bracket (Option B5X) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 335 Cable Assembly (flex circuit), A22 WBDIF J9000 to A28 N9040-60047 WBDIF Extension Board J1 (Option RTS with Option B2X) Cable Assembly (flex circuit), A23 WBDIF J9000 to A28 N9040-60048 WBDIF Extension Board J21 (Option RTS with Option B5X) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 336 Replaceable Parts Figure 14-26 H1G Assembly Table 14-20 H1G Assembly Item Description Keysight Part Number A27 H1G Assembly (Option H1G) N9040-60102 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 337 Figure 14-27 Motherboards Table 14-21 Motherboards Item Description Keysight Part Number Rear Motherboard Rear Motherboard Assembly N9040-63003 Front Motherboard Motherboard (Front/Horizontal mount) N9040-63002 Bottom Motherboard Motherboard Interconnect Board (A7 & A8) N9040-63004 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 338 Replaceable Parts Figure 14-28 Chassis Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 339 < 5605 Options 508, 513, 526 N9040-00006 s/n prefix ≥ 5605 and all Options 544 and 550 N9040-00053 Bracket, Rear Motherboard s/n prefix < 5616 N9040-00002 s/n prefix ≥ 5616 N9040-00058 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 340 < 5605 Options 508, 513, 526 N9040-00014 s/n prefix ≥ 5605 and < 5616, Options 508, 5113, 526 N9040-00050 prefix < 5616 Options 544 and 550 s/n prefix ≥ 5616 all frequency ranges N9040-00057 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 341 Fan Grill (qty 2) 3160-4253 Bracket, Fan (Left side/outer) s/n prefix < 5605 Options 508, 513, 526 N9040-00006 s/n prefix ≥ 5605 and all Options 544 and 550 N9040-00053 Bracket, Fan (right side inner) N9040-00007 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 342 J1 Input Connector Assembly Type-N N9039-60030 2.4 mm N9030-60011 3.5 mm (Option C35) N9020-60196 Screw 0515-0372 Cable, Semi-rigid, RF Input Connector to Attenuator A Option CNF N9040-20025 Option C24 N9040-20114 Option C35 N9040-20043 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 343 A1W4 Cable N9040-60026 A1W1 Cable N9040-60024 A1MP14 Front Panel Interface Bracket N9040-00052 A1MP21 Display Bracket N9040-00018 A1W2 Cable N9040-60027 A1W3 Cable N9040-60029 A1A4 Converter DC-DC 0950-5670 W1 Cable N9040-60030 W29 Semi-Rigid Cable N9040-20044 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 344 Replaceable Parts Figure 14-32 Front Frame Exploded View Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 345 W1 Ribbon Cable N9040-60030 W29 Semi-Rigid Cable N9040-20044 A1A3 Touch Screen Display 2090-1098 A1A6 Front Panel On Button Keyboard N9040-63016 A1MP2 Front Panel On Button Keypad light color N9040-40004 dark color N9040-40010 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 346 Replaceable Parts Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 347: What You Will Find In This Chapter

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide 15 Assembly Replacement Procedures What You Will Find in This Chapter Procedures in this chapter enable you to locate, remove, and replace the following major assemblies in your instrument. Refer to Chapter 14, “Replaceable Parts.”...
  • Page 348 Front Panel Shield on page 476 Front Panel Cables on page 477 DC DC Converter Board on page 478 Controller Bracket and Controller Board on page 479 Display Assembly on page 481 Keyboard/Keypad on page 483 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 349: Before Starting

    Failure to heed the safety precautions can result in severe or fatal injury. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 350: Tools You Will Need

    Adjustments Tests after an instrument repair Refer to Table 16-1 on page 487 for information about post-repair procedures. If one or more instrument assemblies have been repaired or replaced, perform the related adjustments and performance verification tests. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 351: Major Assembly Locations

    A22 Wideband Digital IF (Option B2X) & A23 Wideband Digital IF Assemblies (Option B5X) A14 L.O. Synthesizer Assembly A21 Wideband Analog I.F. Assembly (Options B2X and B5X) A16 Reference Assembly A15 Front End Controller A27 H1G Assembly (Option H1G) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 352: Instrument Outer Case

    4. Using the T-20 driver, remove the four screws (including washers) (3) that hold the rear feet (4) in place. 5. Pull the instrument cover (5) off towards the rear of the instrument. Figure 15-3 Instrument Outer Case Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 353: Replacement

    4. Replace the bottom feet by sliding into place until they snap in. Install the locks by pressing in flat. 5. Replace the handle straps on both sides of the instrument. Torque the handle strap screws to 21 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 354: Top Brace And Card Cage Brace

    (3) (0515-0372), the two screws (4) (0515-1946), the six screws (5) (0515-1946), and the three screws (6) (0515-1946) (only on Option B2X and B5X) attaching the card cage brace to the chassis and the boards. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 355 1. To replace the top brace or the card cage bracket, place them into the correct position and attach the screws referred to in the removal process. Torque to 9 inch-pounds. 2. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 356: Serial Number Prefix ≥ 5605 And All Options 544 And 550

    (3) (0515-1946), and the six screws (4) (0515-0372) attaching the card cage brace to the chassis and the boards. The number of 0515-1946 screws will vary depending on the options installed (fifteen with Options B2X and B5X, twelve with Option B40 only). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 357 1. To replace the top brace or the card cage bracket, place them into the correct position and attach the screws referred to in the removal process. Torque to 9 inch-pounds. 2. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 358: Rf Area - Options 508, 513, 526

    To gain access to any of the RF section parts for removal, follow these steps: 1. Remove the instrument outer case. Refer to the “Instrument Outer Case” removal procedure. 2. Remove the front panel. Refer to the Front Frame Assembly removal procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 359 Remove the RF bracket (1) by removing the eleven (or thirteen with Option RTS) screws (2) (0515-0372), and the two screws (3) (0515-1946), using the T-10 driver. Figure 15-7 RF Bracket Removal, Serial Number Prefix < 5605 Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 360: After The Part Has Been Replaced, Follow These Steps

    (0515-1946), using the T-10 driver. Torque to 9 inch-pounds. 2. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 3. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 361: A9 & A10 Rf Attenuators

    3. Remove the two or three screws (3) (0515-0372), depending on the bracket in your instrument, that attach the attenuator bracket to the chassis using the T-10 driver. 4. Remove the attenuator from the bracket by removing the two screws (4) (0515-0372). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 362 Assembly Replacement Procedures RF Area - Options 508, 513, 526 Figure 15-9 Attenuators Removal - Serial Number < 5605 Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 363 Assembly Replacement Procedures RF Area - Options 508, 513, 526 Figure 15-10 Attenuators Removal - Serial Number ≥ Options 508, 513, 526 Item Keysight Part Number N9040-20025 N9040-20027 N9040-20026 N9040-20028 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 364 4. Replace the ribbon cable and semi-rigid cables W2, W3, W4, and W51 to the attenuators. Torque the semi-rigid cables to 10 inch-pounds. 5. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 365: A11 Low Band Switch

    3. Remove the four screws (2) (0515-0372) using the T-10 driver. The A11 low band switch (1) can now be removed from the chassis. Figure 15-11 Low Band Switch Cable Removal - Options 508, 513, 526 Item Keysight Part Number N9040-20032 N9040-20031 N9040-20030 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 366 3. Replace the ribbon cable W7. Ensure locking tabs on the sides of the connector are engaged. 4. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 367: A12 Ytf Preselector

    15-13. From the bottom of the instrument, remove the four screws (1) (0515-0372). The A12 YTF Preselector can now be removed from the chassis. Figure 15-12 YTF Preselector Removal - Options 508, 513, 526 Item Keysight Part Number N9040-20033 N9040-20034 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 368 Assembly Replacement Procedures RF Area - Options 508, 513, 526 Figure 15-13 YTF Preselector and YTO Bottom Screws Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 369 15-12. Replace the cables W10 and W14. Torque to 10 inch-pounds. 5. Replace the wire harness W11. 6. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 370: A20 Yto

    15-12. Replace the cable W20. Torque to 10 inch-pounds. 3. Replace the ribbon cable W23. Ensure the locking latch is engaged. 4. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 371: Low Noise Path And Microwave Preselector Bypass Switches

    Front Brace Removal 2. Refer to Figure 15-16. Remove cables W10, W14, W15, W51, W52, and W54. Figure 15-16 W10, W14, W15, W51, W52, and W54 Cables Removal - Options 508, 513, Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 372 Unplug the ribbon cable and the wire harnesses from each switch. The switches and bracket can now be removed from the chassis. Figure 15-17 Switch Bracket Bottom Screws Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 373 15-19. To remove the SW3 transfer switch (1) remove the four screws (2) (0515-1934) attaching the switch to the bracket. Figure 15-19 Removing Transfer Switch from Bracket - Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 374 15-20. To remove the SW1 and SW2 coax switches (2) remove the two screws (1) (0515-1992) attaching each switch to the bracket. Figure 15-20 Removing Coax Switches from Bracket - Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 375 (E4410-00104) to the main switch bracket (4). Torque to 6 inch-lbs. Install SW2 (top switch) with the two screws (1) (0515-1992) and SW2 bracket (3) (N9040-00019). Torque to 6 inch-lbs. Figure 15-21 Coax Switches Replacement - Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 376 15-23. Replace AT1 attenuator (3). Torque to 10 inch-lbs. Replace cables W13 and W53. Torque to 10 inch-lbs. Figure 15-23 Replace Attenuator and Cables - Options 508, 513, 526 Item Keysight Part Number N9040-20036 N9040-20029 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 377 4. Place the switches and switch bracket (1) into the chassis as shown in Figure 15-24. Plug the ribbon cable and the wire harnesses into each switch. Figure 15-24 Switch Bracket - Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 378 RF Area - Options 508, 513, 526 5. Replace the three screws (1) (0515-0372) that attach the switch bracket to the chassis as shown in Figure 15-25. Torque to 9 inch-lbs. Figure 15-25 Switch Bracket Bottom Screws Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 379 15-26. Replace cables W10, W14, W15, W51, W52, and W54. Torque to 10 inch-lbs. Figure 15-26 W10, W14, W15, W51, W52, and W54 Cables Replacement - Options 508, 513, 526 Item Keysight Part Number N9040-20033 N9040-20034 N9040-20035 N9040-20028 N9040-20031 N9040-20030 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 380 (2) (0515-0372). Torque to 9 inch-lbs. Figure 15-27 Front Brace Replacement 8. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 381: A13 Rf Front End Assembly

    2. Refer to Figure 15-28. Remove the chassis base stiffener (1) by removing the six screws (2) (0515-0372) and the two screws (3) (0515-1946). Figure 15-28 Chassis Base Stiffener Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 382 W18, W21 W30, and W33 from the A13 Front End assembly. Figure 15-29 Front End Assembly Cables Removal - Options 508, 513, 526 Figure 15-30 Front End Assembly Side Cables Removal - Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 383 15-32. From the bottom of the instrument, remove the six screws (2) (0515-0372) that attach the Front End assembly (1) to the chassis. The Front End assembly can now be removed. Figure 15-32 Front End Assembly Bottom Screws - Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 384 9 inch-pounds in the order shown (#1 to #6). Make sure ribbon cable W22 is under the 4 guide tabs on the back of the Front End assembly. Figure 15-33 Front End Assembly Bottom Screws - Replacement Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 385 15-34. Place the chassis base stiffener (1) in position on the chassis base. Secure with the six screws (2) (0515-0372) and the two screws (3) (0515-1946). Torque all screws to 9 inch-pounds. Figure 15-34 Chassis Base Stiffener Replacement Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 386 W18, W21 W30, and W33. Torque to 10 inch-pounds. Figure 15-35 Front End Assembly Cables Replacement - Options 508, 513, 526 Figure 15-36 Front End Assembly Side Cables Replacement - Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 387 Preselector Bypass Switches” replacement procedure on page 377 replace the bracket and switch assembly and front brace. 6. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 388: Rf Area - Options 544, 550

    To gain access to any of the RF section parts for removal, follow these steps: 1. Remove the instrument outer case. Refer to the “Instrument Outer Case” removal procedure. 2. Remove the front panel. Refer to the Front Frame Assembly removal procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 389: After The Part Has Been Replaced, Follow These Steps

    (0515-1946), using the T-10 driver. Torque to 9 inch-pounds. 2. Replace the front panel. Refer to the Front Frame Assembly replacement procedure. 3. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 390: A9 & A10 Rf Attenuators

    3. Remove the three screws (3) (0515-0372) that attach the attenuator bracket to the chassis using the T-10 driver. 4. Remove the attenuator from the bracket by removing the two screws (4) (0515-0372). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 391 Assembly Replacement Procedures RF Area - Options 544, 550 Figure 15-40 Attenuators Removal - Options 544, 550 Item Keysight Part Number N9040-20114 N9040-20103 N9040-20102 N9040-20104 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 392 5. Replace the ribbon cable and semi-rigid cables W2, W3, W4, and W51 to the attenuators. Torque the semi-rigid cables to 10 inch-pounds. 6. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 393: A11 Low Band Switch

    3. Remove the five screws (2) (0515-0372) using the T-10 driver. The A11 low band switch (1) can now be removed from the chassis. Figure 15-41 Low Band Switch Cable Removal - Options 544, 550 Item Keysight Part Number N9040-20108 N9040-20106 N9040-20107 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 394 3. Replace the ribbon cable W7. Ensure locking tabs on the sides of the connector are engaged. 4. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 395: A12 Ytf Preselector

    15-43. From the bottom of the instrument, remove the four screws (1) (0515-0372). The A12 YTF Preselector can now be removed from the chassis. Figure 15-42 YTF Preselector Removal - Options 544, 550 Item Keysight Part Number N9040-20109 N9040-20110 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 396 Assembly Replacement Procedures RF Area - Options 544, 550 Figure 15-43 YTF Preselector and YTO Bottom Screws Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 397 15-42. Replace the cables W67 and W68. Torque to 10 inch-pounds. 5. Replace the wire harness W11. 6. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 398: A20 Yto

    15-42. Replace the cable W20. Torque to 10 inch-pounds. 3. Replace the ribbon cable W23. Ensure the locking latch is engaged. 4. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 399: Transfer Switches

    (2) (0515-0372). Figure 15-45 Front Brace Removal 2. Refer to Figure 15-46. Remove cables W51, W52, W54, W66, W67, W68, and W69. Figure 15-46 Transfer Switch Cables Removal - Options 544, 550 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 400 Unplug the ribbon cable and the wire harnesses from each switch. The switches and bracket can now be removed from the chassis. Figure 15-47 Switch Bracket Bottom Screws Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 401 15-48. To remove either SW3 or SW6 transfer switch remove the four screws (1) (0515-1934) attaching the switch to the bracket. Figure 15-48 Removing Transfer Switch from Bracket - Options 544, 550 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 402 2. Place the switches and switch bracket (1) into the chassis as shown in Figure 15-50. Plug the ribbon cable and the wire harnesses into each switch. Figure 15-50 Switch Bracket - Options 544, 550 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 403 RF Area - Options 544, 550 3. Replace the three screws (1) (0515-0372) that attach the switch bracket to the chassis as shown in Figure 15-51. Torque to 9 inch-lbs. Figure 15-51 Switch Bracket Bottom Screws Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 404 15-52. Replace cables W51, W52, W54, W66, W67, W68, and W69. Torque to 10 inch-lbs. Figure 15-52 Transfer Switch Cables Replacement - Options 544, 550 Item Keysight Part Number N9040-20104 N9040-20106 N9040-20107 N9040-20105 N9040-20109 N9040-20110 N9040-20111 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 405 (2) (0515-0372). Torque to 9 inch-lbs. Figure 15-53 Front Brace Replacement 6. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 406: A13 Rf Front End Assembly

    2. Refer to Figure 15-54. Remove the chassis base stiffener (1) by removing the six screws (2) (0515-0372) and the two screws (3) (0515-1946). Figure 15-54 Chassis Base Stiffener Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 407 W17, and W30 from the A13 Front End assembly. Some cables will not be present if the instrument is not Option B5X. Figure 15-55 Front End Assembly Cables Removal - Options 544, 550 (Option B5X shown) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 408 15-57. From the bottom of the instrument, remove the six screws (2) (0515-0372) that attach the Front End assembly (1) to the chassis. The Front End assembly can now be removed. Figure 15-57 Front End Assembly Bottom Screws - Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 409 9 inch-pounds in the order shown (#1 to #6). Make sure ribbon cable W22 is under the 4 guide tabs on the back of the Front End assembly. Figure 15-58 Front End Assembly Bottom Screws - Replacement Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 410 15-59. Place the chassis base stiffener (1) in position on the chassis base. Secure with the six screws (2) (0515-0372) and the two screws (3) (0515-1946). Torque all screws to 9 inch-pounds. Figure 15-59 Chassis Base Stiffener Replacement Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 411 RF Area - Options 544, 550 3. Refer to Figure 15-60. Replace cables W8, W16, W17, W18, W21, W30, and W33. Torque to 10 inch-pounds. Figure 15-60 Front End Assembly Cables Replacement - Options 544, 550 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 412 “Transfer Switches” replacement procedure on page 404 to replace the bracket and switch assembly and front brace. 6. Replace the RF bracket, front panel, and instrument outer case as described on page 360. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 413: Card Cage Boards

    1. Replace the card cage brace as described in the “Top Brace and Card Cage Brace” replacement procedure. 2. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 414: A15 Front End Control

    2. Refer to Figure 15-63. Reinstall cables W5, W7, W11, W12, W16, W22, W25, W26, W27, W28, W30, and W55. You should hear a distinct "snap" when reinstalling the small mmcx cables. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 415: A16 Reference Assembly

    W33, W34 (if present), W36, W37, W39, and W46 or W47. Figure 15-64 Reference Cables The cables will look different for an Option B40 instrument. Figure 15-65 Reference Cables - Option B40 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 416 15-64. Reinstall cables W3, W18, W31, W33, W34, W36, W37, W39, and W46. You should hear a distinct "snap" when reinstalling the small mmcx cables. Torque the semi-rigid cables to 10 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 417: A21 Wideband Analog I.f. Assembly (Option B2X And B5X Only)

    (1) (0515-0372). Then unplug W56 from the interconnection with W57. Figure 15-67 Wideband I.F. Ribbon Cable 4. Refer to Figure 15-68. Remove cables W34, W40, W41, W45, and W46. Figure 15-68 Wideband I.F. Cables Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 418 15-67. Plug ribbon cable W56 into W57 at the interconnect. Replace the single screw (1) (0515-0372). Torque to 9 inch-pounds. 5. Replace the top brace as described in the “Top Brace and Card Cage Brace” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 419: A14 L.o. Synthesizer

    9 inch-pounds. 3. Refer to Figure 15-69. Reinstall cables W20, W21, W23, and W32. Torque the semi-rigid cables to 10 inch-pounds. 4. Refer to Figure 15-70. Reinstall cable W31. Torque to 10 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 420: Rear Panel

    15-71. Remove the twenty-one screws (1) (0515-0372) and the four screws (2) (0515-1946). The rear panel can now be removed from the chassis. Figure 15-71 Rear Panel Screw Locations Serial Number Prefix < 5616 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 421 15-72. Remove the fifteen screws (1) (0515-0372), the four screws (2) (0515-1946), and the eight screws (3) (0515-0433). The rear panel can now be removed from the chassis. Figure 15-72 Rear Panel Screw Locations Serial Number Prefix ≥ 5616 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 422: Replacement

    (2) (0515-1946). Torque to 9 inch-pounds. — Replace the eight screws (3) (0515-0433). Torque to 21 inch-pounds. 4. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 423: A22 & A23 Wideband Digital I.f. Boards

    (2) (0515-0372) and the one or two screws (3) (0515-1946). Option B2X instruments will only have the top screw, while Option B5X instruments will have both. Figure 15-73 Rear Brace Removal Serial Number Prefix < 5605 Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 424 (0515-1946). Option B2X instruments will only have the top screw, while Option B5X instruments will have both. Figure 15-74 Rear Brace Removal Serial Number Prefix ≥ 5605 and All Options 544 and 550 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 425 Unplug the ribbon cables from each Wideband Digital I.F. board. Use the ejectors to remove the boards from the chassis by sliding them towards the rear of the instrument. Figure 15-75 Wideband Digital I.F. Boards Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 426: Replacement

    (3) (0515-1946). Torque all screws to 9 inch-pounds. 5. Replace the top brace as described in the “Top Brace and Card Cage Brace” replacement procedure. 6. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 427: A27 H1G Assembly (Option H1G)

    IF 2 OUT cables from the rear panel. 6. Refer to Figure 15-76. Remove the rear brace (1) by removing the four screws (2) (0515-0372) and the seven screws (3) (0515-1946). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 428 8. Refer to Figure 15-77.Remove the snap-in cables from the board assembly. Leave the blue cables attached for removal later. Figure 15-77 Early H1G Assembly Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 429 Replace the cable ties after cable re-routing. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 430 10.Re install the rear brace and rear panel using the screws removed earlier. 11.Locate the black plastic hole plug in the kit and install in the IF 2 IN hole on the rear panel. 12.Re install the top brace and instrument enclosure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 431: Replacement Process When The H1G Assembly Is The Later Version

    6. Remove the snap-in cables from the board assembly. Remove the blue cable from the H1G assembly J12 using a 5/16-inch wrench. See Figure 15-80. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 432 4. Connect the 13, 15 and 16 color cables to the H1G assembly J13, J15 and J16. Assure the cables snap in securely. 5. Re install the rear brace and rear panel using the screws removed earlier. 6. Re install the top brace and instrument enclosure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 433: A28 Wideband Extension Board (Option Rts)

    15-81. Remove the RF bracket (1) by removing the thirteen screws (2) (0515-0372), and the two screws (3) (0515-1946), using the T-10 driver. Figure 15-81 RF Bracket Removal, Serial Number Prefix < 5605 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 434 15-82. Remove the RF bracket (1) by removing the thirteen screws (2) (0515-0372), and the six screws (3) (0515-1946), using the T-10 driver. Figure 15-82 RF Bracket Removal, Serial Number ≥ Prefix 5605 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 435 Remove the three screws (1) attaching the Wideband Extension board (2) to the chassis. The A28 Wideband Extension board can now be removed from the chassis. Figure 15-83 Wideband Extension Board Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 436 LED to be visible from the rear panel. The gasket is fragile. Carefully peel off the backing from the gasket and apply the sticky side of the gasket over the two Wideband Extension board connectors. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 437: Replacement

    1. Refer to Figure 15-85 Figure 15-86. The flex circuit cables will need to be routed as shown. Figure 15-85 Flex Circuit Routing - 1 Figure 15-86 Flex Circuit Routing - 2 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 438 434. 5. Replace the top brace. Refer to the “Top Brace and Card Cage Brace” replacement procedure. 6. Replace the instrument outer case. Refer to the “Instrument Outer Case” replace procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 439: A6 Power Supply

    A6 power supply (1) to the chassis. The power supply can now be removed by sliding it out of the rear of the chassis. Figure 15-88 Power Supply Removal Serial Number Prefix < 5605 Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 440 (2) to the A6 power supply (1). When reinstalling the bracket torque the screws to 9 inch-pounds. Figure 15-89 Power Supply Bracket Separation Serial Number Prefix < 5605 Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 441 A6 power supply (1) to the bracket. The power supply can now be removed by sliding it out of the rear of the chassis. Figure 15-90 Power Supply Removal Serial Number Prefix ≥ 5605 and All Options 544 and 550 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 442: Replacement

    4. Replace the top brace as described in the “Top Brace and Card Cage Brace” replacement procedure. 5. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 443: A4 Cpu/A5 Solid State Drive

    1. Refer to Figure 15-91. Slide the CPU assembly into the slot and use the ejectors to mate the CPU with the rear motherboard. Replace the six screws (2) (0515-0372). Torque to 9 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 444: Replacement Of A5 Ssd Or A4A1Cpu Memory Card

    Replacement of A5 SSD or A4A1CPU Memory Card Disk Drive Removal 1. Refer to Figure 15-92. Loosen the thumb screw (2) and pull the SSD (1) out of the CPU assembly. Figure 15-92 SSD Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 445 CPU memory card. 2. Refer to Figure 15-92. Slide the SSD into the CPU assembly and push to mate the connector. Secure the thumb screw to 9 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 446 To install the memory card push it into the slot until you feel the spring catch. Then replace the SSD as described on page 445. Figure 15-94 CPU Memory Card Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 447: A2 Aif/A3 Dif

    2. Remove the rear panel. Refer to the “Rear Panel” removal procedure. 3. Refer to Figure 15-95. Remove cables W39, W40, W42, and W47 from the bottom of the DIF assembly. Figure 15-95 DIF Cables Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 448: Separate Aif/Dif Assembly

    1. Refer to Figure 15-97. To separate the AIF (1) from the DIF (2), unplug ribbon cable W43 from the AIF assembly. 2. From underneath the assembly, remove the three screws (3) (0515-0372). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 449: Replacement

    15-95. Replace cables W39, W40, W42, and W47 to the bottom of the DIF assembly. 5. Replace the rear panel. Refer to the “Rear Panel” replacement procedure. 6. Replace the instrument outer case. Refer to the “Instrument Outer Case” replace procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 450: Fan Assembly

    15-98. Remove the nine screws (1) (0515-0372) and the two screws (2) (0515-1946) that attach the fan bracket to the chassis. Figure 15-98 Fan Bracket Removal Serial Number Prefix < 5605 Options 508, 513, 526 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 451 15-99. Remove the seven screws (1) (0515-0372) and the six screws (2) (0515-1946) that attach the fan bracket (3) to the chassis. Figure 15-99 Fan Bracket Removal Serial Number Prefix ≥ 5605 and All Options 544 and 550 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 452 Assembly Replacement Procedures Fan Assembly 5. Refer to Figure 15-100. Fold the fan bracket down and unplug both fan wires from the rear motherboard. Figure 15-100 Unplug Fan Wires Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 453: Fan Replacement

    Feed the fan wires through the grommet. Reattach the wire retaining clip with the screw (0515-0372). 3. Place the side bracket (4) into position and replace the six screws (2) (0515-1038). Torque to 9 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 454: Replacement

    Torque all screws to 9 inch-pounds. 4. Replace the front frame. Refer to the “Front Frame Assembly” replacement procedure. 5. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 455: Motherboards

    Card Cage Brace” removal procedure. 3. Remove the front frame. Refer to the “Front Frame Assembly” removal procedure. 4. Remove all of the card cage assemblies. Refer to the “Card Cage Boards” procedures. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 456 15-103. Remove the RF bracket (1) by removing the eleven (or thirteen with Option RTS) screws (2) (0515-0372), and the two screws (3) (0515-1946), using the T-10 driver. Figure 15-103 RF Bracket Removal, Serial Number Prefix < 5605 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 457 Serial Number ≥ Prefix 5605 7. Remove the fan bracket. Refer to the “Fan Assembly” removal procedure. 8. Refer to Figure 15-105. Remove the front brace (1) by removing the eleven screws (2) (0515-0372). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 458 Assembly Replacement Procedures Motherboards Figure 15-105 Front Brace Removal 9. Remove the Low Band switch assembly. Refer to the “A11 Low Band Switch” removal procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 459 15-107. Remove the seven screws (1) (0515-0372) that attach the front motherboard bracket to the chassis. Use the ejectors to disconnect from the rear motherboard and pull out towards the front of the instrument to remove from the chassis. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 460 15-108. To separate the front motherboard (1) from the bracket (2), remove the nine screws (3) (0515-0372). When replacing the screws, torque to 9 inch-pounds. Figure 15-108 Front Motherboard and Bracket Separation Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 461 11.Replace the top brace and card cage brace. Refer to the “Top Brace and Card Cage Brace” replacement procedure. 12.Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 462: Rear Motherboard (A7 Rear Motherboard)

    — Refer to Figure 15-109. Remove the six screws (1) (three on each side) (0515-0372) that attach the rear motherboard bracket to the chassis. Figure 15-109 Rear Motherboard Removal Serial Number Prefix < 5616 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 463 — Refer to Figure 15-110. Remove the eight screws (1) (four on each side) (0515-0433) that attach the rear motherboard bracket to the chassis. Figure 15-110 Rear Motherboard Removal Serial Number Prefix ≥ 5616 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 464 Torque to 21 inch-pounds. 3. Refer to Figure 15-111. Replace the five screws (1) (0515-0372) to attach the rear motherboard bracket to the bottom of the chassis. Torque to 9 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 465: Bottom Motherboard (A24 Motherboard Interconnect)

    15-112. Remove the two screws (1) (0515-0372) that attach the bottom motherboard to the chassis. Push the bottom motherboard forward to disengage from the locking pins on the chassis. Figure 15-112 Bottom Motherboard Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 466 Torque to 9 inch-pounds. 2. Replace the rear motherboard. Refer to the “Rear Motherboard (A7 Rear Motherboard)” replacement procedure. 3. Replace the front motherboard. Refer to the “Front Motherboard (A8 Front Motherboard)” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 467: Input Connector

    Figure 15-113. Disconnect the W2 semi-rigid cable from the input connector (1). Figure 15-113 Input Connector Removal 4. Remove the two screws (2) (0515-0372) that attach the input connector to the chassis. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 468: Replacement

    2. Reconnect the semi-rigid cable W2 to the input connector. Torque to 10 inch-pounds. 3. Replace the front frame. Refer to the “Front Frame Assembly” replacement procedure. 4. Replace the instrument outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 469: Front Frame Assembly

    “Instrument Outer Case” removal procedure. 2. Refer to Figure 15-114. Disconnect the two cables (1) (just behind the front frame) with a 5/16-inch wrench and a 1/4-inch wrench. Figure 15-114 EXM Cable Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 470 Figure 15-115. Disconnect W1 ribbon cable from the rear motherboard at the location indicated. The cable has locking tabs on each side, pinch and pull to release. Figure 15-115 Front Panel Cable Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 471 (1) (seven on each side) (0515-2044). Using the T-10 driver, remove the one screw (2) (0515-0372). The front frame can now be detached from the chassis. Figure 15-116 Front Frame Assembly Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 472: Replacement

    4. Refer to Figure 15-114. Reconnect the two cables (1) just behind the front frame. Torque to 10 inch-pounds. 5. Replace the outer case. Refer to the “Instrument Outer Case” replacement procedure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 473: Front Frame Assembly Components

    Front Frame Parts Item Description Item Description A1A5 Controller Board A1W2 Cable A1W4 Cable A1W3 Cable A1W1 Cable A1A4 Converter DC-DC A1MP14 Front Panel Interface Bracket W1 Cable A1MP21 Display Bracket W29 Semi-rigid Cable Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 474 Assembly Replacement Procedures Front Frame Assembly Figure 15-118 Front Frame Exploded View Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 475 A1W3 Cable Assembly DC-DC Converter Board Front Panel Interface Board Shield W1 Ribbon Cable W29 Semi-Rigid Cable A1A3 Touch Screen Display A1A6 Front Panel On Button Keyboard A1MP2 Front Panel On Button Keypad Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 476 3. When replacing the front panel shield, torque all screws to 9 inch-pounds, When replacing ribbon cable W1 press firmly on each side to ensure the hooks catch on the boards mating connector. 4. When replacing the cable W29 torque to 10 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 477 Front Frame Assembly Front Panel Cables Figure 15-120 Front Panel Cables 1. Refer to Figure 15-120. Remove cables A1W2, A1W3, and A1W4. 2. When replacing the cables, dress in the appropriate cable clamps. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 478 DC DC Converter Board 1. Refer to Figure 15-121. To remove the DC DC converter board (1), remove the two screws (2) (0515-0372). 2. When replacing the board, torque the screws to 9 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 479 15-123. Unplug cable A1W1 from the controller board at the location shown. Pull up on the locking tab to remove the cable. To remove the controller board (1), remove the four screws (2) (0515-0372). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 480 3. When replacing the board, position on top of the keyboard and press down to mate connectors. Torque the screws to 9 inch-pounds. When replacing the cable A1W1 press down on the locking tab with the cable fully seated to secure. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 481 Front Frame Assembly Display Assembly Removal 1. Refer to Figure 15-124. Remove the six screws (2) (0515-1946). The display assembly (1) can now be lifted out of the front frame. Figure 15-124 Display Removal Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 482 4. Place the display compression pad (3) on the display as shown in Figure 15-125. Make sure the pad is seated properly. 5. Place the display bracket (4) onto the display and replace the four screws (5) (0515-1946). Torque to 6 inch-pounds. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 483 2. Refer to Figure 15-127. To separate the keypad (1) from the keyboard (2), pull the keypad away from the keyboard to release the multiple rubber tabs. Figure 15-127 Keyboard Keypad Separation Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 484 Torque the screws to 9 inch-pounds, starting with the screw #1 first and then #2 as shown in Figure 15-126. Replace the RPG knob by firmly pushing it onto the shaft. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 485: Post-Repair Procedures

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide Post-Repair Procedures What You Will Find in This Chapter This chapter provides information that will enable you to return an instrument to full operation following the replacement of any instrument assembly. This information includes a table that shows which adjustments and/or performance tests must be executed after replacing an assembly.

  • Page 486: Post-Repair Procedures

    The following procedures are also included in the “Additional Tasks” on page 491. — “Calibration Data Backup and Restore” — “BIOS Settings Verification” — “FPGA Synchronization” — “Programming Model and Serial Numbers” Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 487 Residual Responses Power Supply Displayed Average Noise Level Spurious Responses Residual Responses Program Instrument Model and Serial Number Midplane board Displayed Average Noise Level None Run all tests since instrument was Motherboard disassembled. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 488 Second Harmonic Distortion Absolute Amplitude Accuracy Frequency Response (below 3.6 GHz) Effective DANL Residual Responses FPGA Synchronization Synthesizer Displayed Average Noise Level Assembly Spurious Responses Phase Noise (All Tests) Frequency Response (All Tests) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 489 SW1 or SW2 Frequency Response (all tests) Frequency Response (all tests) Preselector bypass Reset Preselector Bypass cycles using software utility Effective DANL switch Characterize Noise Floor (Press System, (Option MPB) Alignments, Advanced) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 490 The 50 MHz and 4800 MHz Calibrator Amplitude Adjustments must be done prior to Frequency Response Adjustments. Some Adjustment tests may be found in the Utility portion of the Test Plan. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 491: Additional Tasks

    2. Connect a USB FLASH drive to one of the front panel USB port. 3. Press System, Alignments, Backup or Restore Align Data. 4. The Alignment Data Wizard window as shown in Figure 16-1 will appear. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 492 3. Using the mouse double-click on the Windows Explorer link on the desktop and navigate to the following folder: C:\Program Files\Agilent\SignalAnalysis\Physics 4. Double-click on BackupAndRestore.exe and the window shown in Figure 16-2 will appear. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 493 7. Select “Backup” and wait for the calibration database to be backed up. 8. When the backup has completed close the Calibration Data Backup And Restore window. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 494 Backup or Restore Align Data... The Alignment Data Wizard window as shown in Figure 16-1 will appear. 4. Follow the on-screen instruction to restore the previously saved calibration data from the USB FLASH drive. 5. Cycle instrument power. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 495 1. Connect an external USB keyboard to one of the front panel USB ports. 2. Turn on instrument power. 3. Confirm Keysight Technologies splash screen comes up within a few seconds. 4. Press the key on the keyboard specified on the initial boot screen to enter the setup utility.
  • Page 496 Initialization 1. With the new disk drive installed power the instrument on. 2. Within a few seconds you will see the initial Keysight Technologies splash screen, and then the boot selection menu as seen in Figure 16-3.
  • Page 497 If the initialization process would like to be postponed select “Do Not Agree” at this time to safely shut the instrument off. The next time this disk drive is powered on this process will be restarted. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 498 Figure 16-5 Anti-Virus Message 7. The disk drive in use is now ready for further configuration. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 499 3. Using the mouse double-click on the Windows Explorer link on the desktop and navigate to the following folder: C:\Program Files\Agilent\SignalAnalysis\Physics 4. In this folder find and execute the file named: FPGA_Prog.bat Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 500 7. The programming of the FPGA code could take a few minutes to complete. Once it has finished the instrument will reboot itself to use the new code and this process will then be completed. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 501 A7 Midplane board assembly replacement. To program the model and serial numbers into a replacement A7 Midplane board assembly the N7800A Keysight Calibration Application Software will be required. Information regarding N7800A Keysight Calibration Application Software can be found at: http://www.keysight.com/find/calibrationsoftware...
  • Page 502 Post-Repair Procedures Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 503: 17 Functional Tests

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide 17 Functional Tests Functional Test Versus Performance Verification Functional tests are tests of various instrument parameters that give a high degree of confidence that the analyzer is operating correctly. They are recommended as a check of analyzer operation for incoming inspection or after a repair.

  • Page 504: Before Performing A Functional Test

    Press System, Alignments, Align Now, All. Functional test accuracy depends on the precision of the test equipment used. Ensure that all of the test equipment is calibrated before running a functional test. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 505: Test Equipment

    Frequency: 50 MHz 8493C 8493A (2 required) Option 010 Option 010 VSWR: < 1.2:1 8493B Option 010 Preamp 30 dB Fixed Attenuator Accuracy: < 0.05 dB @ 50 MHz 11708A Options (Pxx) Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 506 Power Splitter, 3.5 mm Nominal Insertion Loss: 6 dB 11667B Tracking Between Ports: < 0.25 dB 508, 513 Power Splitter Nominal Insertion Loss: 6 dB 11667A 11667B Tracking Between Ports: < 0.25 dB Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 507 PSG model numbers: E8244A, E8254A, E8247C Option 520, E8247C Option H31 or 540, E8257D Option 520, E8257D Option 550, E8257D Option 567, E8267D Option 544. c. Maximum frequency equal to or greater than the maximum frequency of the preamplifier option. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 508: Displayed Average Noise Level (Danl)

    AMPTD Y Scale, –70, dBm AMPTD Y Scale, Attenuation, MechAtten, 0, dB BW, Res BW, 1, kHz BW, Video BW, 100, Hz Meas Setup, Average/Hold, Number, 20, Enter Trace, Trace Average Single Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 509 11.The value of the normalized displayed average noise should be less than the specification value. 12.Change the analyzer center frequency to the next value listed in Table 17-1. Press: FREQ Channel, Center Freq, [Table 2-1 Value], GHz Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 510 Measured Average Noise Level Normalized Average Noise Test Limits Center Frequency (dBm) Level/(1 Hz BW) (dBm) (dBm) 10 MHz –153 2 GHz –152 6 GHz –148 13 GHz –147 20 GHz –140 26.5 GHz –133 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 511: Frequency Readout Accuracy

    Frequency: 10 MHz to 1.51 GHz 11500E 1 meter VSWR: < 1.4:1 Cable, BNC, Frequency: 10 MHz 10503A 120 cm Synthesized Sweeper Frequency: 10 MHz to 1.51 GHz Figure 17-2 Frequency Readout Accuracy Test Setup Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 512: Procedure

    1505.44 MHz 54.1 1505 1504.8122 MHz 1505.1878 MHz 7.95 1505 1504.97240 MHz 1505.0276 MHz 0.106 1505 1504.999630 MHz 1505.000370 MHz 1.98 517.59 517.58316 MHz 517.59684 MHz 1.98 832.50 832.49316 MHz 832.50684 MHz Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 513: Second Harmonic Distortion (Shd)

    Cutoff Frequency: 50 MHz 0955-0306 50 MHz Low Pass Rejection at 65 MHz: > 40 dB Rejection at 75 MHz: > 60 dB Synthesized Sweeper Frequency: 50 MHz Spectral Purity: Better than –30 dBc Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 514: Procedure

    7. On the signal analyzer, activate the marker delta function by pressing the Marker and Delta keys. 8. On the signal analyzer, press: FREQ Channel, Center Freq, 80, MHz Meas Setup, Average/Hold Number, 20, Enter Trace/Detector, Trace Average Single Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 515 9. Press Peak Search. Enter the displayed value under the Measured Second Harmonic Distortion (dBc) heading in Table 17-3. Table 17-3 Second Harmonic Distortion Results Applied Frequency Measured Second Harmonic Distortion Mixer Level Specification (MHz) (dBc) (dBm) (dBc) –15 –60 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 516: Amplitude Accuracy At 50 Mhz

    Compatible with power sensor E4418B Power Sensor Amplitude Range: -25 dBm to 10 dBm 8485A Power Splitter 3.5 mm (f) connectors 11667B 6 dB loss Synthesized Sweeper Typical Temperature Stability: 0.01 dBc/°C Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 517: Procedure

    4. Press Mode, Spectrum Analyzer, Mode Preset on the analyzer. 5. Set up the synthesized sweeper by pressing: CW, 50, MHz Power Level, -4, dBm RF (On) 6. Set up the signal analyzer by pressing: Input/Output, More, Freq Ref In, External Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 518 Amplitude Test Limit Source (dB) (MHz) Amplitude Amplitude Accuracy (dB) Amplitude Meas_amp Power_meter Error (dBm) (dBm) (dBm) (dB) ±1.13 dB ±1.13 dB ±1.13 dB ±1.13 dB ±1.13 dB ±1.13 dB ±1.13 dB Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 519: Testing Preamp Option (P08, P13, P26)

    Amplitude Accuracy Results (Option P08, P13, P26) Nominal Res BW Span Measured Power Meter Amplitude Test Limit Low- Source (kHz) (kHz) Amplitude Amplitude Accuracy (dB) band Amplitude Meas_amp Power_meter Error Preamp (dBm) (dBm) (dBm) (dB) ±1.30 dB Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 520: Frequency Response (Flatness)

    Tracking between ports: < 0.25 dB Synthesized Sweeper Frequency Range: 50 MHz to 50 GHz a. Maximum frequency of the sweeper must be greater than or equal to maximum specified fre- quency of the UXA. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 521: Procedure

    4. Press Mode, Spectrum Analyzer, Mode Preset on the signal analyzer, and press Preset on the synthesized sweeper. 5. Set up the synthesized sweeper by pressing: CW, 50, MHz Power level, –4, dBm Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 522 (Meas - Meas @ 50 MHz) Error Error 18.Enter the computed flatness error value into the Flat column of Table Norm 17-6. 19.Compare the value of Flat to the test limit. Norm Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 523 9 GHz ±3.0 dB 11 GHz ±3.0 dB 13 GHz ±3.0 dB 14 GHz ±3.5 dB 17 GHz ±3.5 dB 20 GHz ±3.5 dB 23 GHz ±3.5 dB 26 GHz ±3.5 dB Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 524: Frequency Response (Flatness), Preamp On

    Attenuator, 30 dB Fixed Frequency: 50 MHz 11708A Accuracy: ±0.05 dB Power Sensor Frequency Range: 50 MHz to 26.5 GHz 8485D (Opt P08, P13, P13) Amplitude Range: –65 dBm to –55 dBm Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 525 Frequency Range: 50 MHz to 50 GHz a. Maximum frequency of the sweeper must be equal to or greater than the maximum frequency of the preamplifier option. Figure 17-6 Frequency Response Test Setup Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 526: Procedure

    13.Enter the power sensor calibration factor into the power meter. 14.For frequencies 3.6 GHz and above, press AMPTD Y Scale, then Presel Center to center the preselector filter for an optimum amplitude measurement. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 527 9 GHz ±3.5 dB 11 GHz ±3.5 dB 13 GHz ±3.5 dB 14 GHz ±4.0 dB 17 GHz ±4.0 dB 20 GHz ±4.0 dB 23 GHz ±4.0 dB 26 GHz ±4.0 dB Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 528: Scale Fidelity

    Frequency: 10 MHz to 26.5 GHz 11500E 1 meter (2 required) VSWR: < 1.4:1 Cable, BNC Frequency: 10 MHz 10503A 120 cm Synthesized Sweeper Output Level Accuracy: 0 to –15 dBm: ±1.0 dB Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 529: Procedure

    Input/Output, More, Freq Ref In, External FREQ Channel, Center Freq, 50, MHz SPAN X Scale, Span, 1, MHz AMPTD Y Scale, Ref Level, 0, dBm Meas Setup, Average/Hold Number, 10, Enter Trace/Detector, Trace Average Peak Search Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 530 Select the next External attenuator setting. b. Press the Restart key to trigger a 10 sweep average. c. Enter the delta marker value into Table 17-8. d. Check delta marker reading against the test limits. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 531 Functional Tests Scale Fidelity Table 17-8 Scale Fidelity Results Minimum Marker Delta Value Maximum External Attenuator Setting (dB) (dB) (dB) Reference –11.0 –9.0 –21.0 –19.0 –31.0 –29.0 –41.0 –39.0 –51.0 –49.0 Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 532 Functional Tests Scale Fidelity Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 533: 18 Instrument Software

    Keysight Technologies N9040B UXA Signal Analyzer Service Guide 18 Instrument Software What You Will Find in This Chapter Instrument Software Overview on page 534 Software Licensing on page 534 Software Updates on page 535 Instrument Measurement Application Software on page 535...

  • Page 534: Instrument Software Overview

    The other exception is N9051B. Software Licensing All application software needs to have a valid license in order to be available for use. This also includes the spectrum analyzer application (N9060B). Keysight Technologies N9040B UXA Signal Analyzer Service Guide...

  • Page 535: Software Updates

    To determine what revisions are compatible, and if a further updates are required, please see the software compatibility information on the instrument measurement application software download web page listed above. Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 536 Instrument Software Software Updates Keysight Technologies N9040B UXA Signal Analyzer Service Guide...
  • Page 537 Index Numerics removal A4A1 CPU memory card A16 reference assembly removal part number A4A1 memory card 50 ohm load A1A2 front panel interface removal 50 ohm/75 ohm minimum loss board A4BT1 CPU board battery part number part number A1A3 LCD post-repair setup part number A5 disk drive...
  • Page 538 309, 311, 312, 313, 316, 318, 319, AC probe computer block diagram 323, 337, 338, 341, 342, 343, 344, broadband preamplifiers contacting Keysight 473, power splitters corrections menu external VGA monitor RF limiters description advisory messages...
  • Page 539 H1G, 1 GHz Analysis messages Bandwidth keypad advisories handle part number error see bail handle Keysight Technologies errors hardware contacting warnings external Sales and Service offices , 304, 306, 308, 309, 311, messages, warning splash screen 312, 313, 316, 318, 319, 323, 337,...
  • Page 540 Index RF Flatness menu description RF Front End packaging test equipment see A13 RF Front End parts post-repair Assembly replaceable tests. See functional tests RF input connector performance verification tests timebase key description part number vs functional tests top brace RF limiters post-repair procedures part number...
  • Page 541 Index yellow LED , 48, yig filter see A12 YTF see A12 YTF Index-541...
  • Page 542 This information is subject to change without notice. © Keysight Technologies 2015-2019 Edition 1, June 2019 N9040-90006 www.keysight.com...

This manual is also suitable for:

N9040bN9040b option 526N9040b option 550N9040b option 544

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