Page 1 Keysight N5166B CXG N5171B/72B/73B EXG N5181B/82B/83B MXG X-Series Signal Generators Service Guide...
Page 2 DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY beyond those set forth in the TERMS IN THE SEPARATE EULA shall apply, except to the © Keysight Technologies, Inc. AGREEMENT WILL CONTROL. extent that those terms, rights, or 2012-2019 licenses are explicitly required...
Page 3 Where to Find the Latest Information Documentation is updated periodically. For the latest information about these products, including instrument software upgrades, application information, and product information, browse to one of the following URLs, according to the name of your product: http://www.keysight.com/find/mxg To receive the latest updates by email, subscribe to Keysight Email Updates at the following URL: http://www.keysight.com/find/MyKeysight...
Page 5: Table Of Contents
Contacting Keysight Technologies ........
Page 6 Contents Overview..............54 Model Number .
Page 7 Contents Self Tests Do Not Run or Self Tests Run Slowly........96 5.
Page 8 Contents 512 Reference Unlocked ..........130 508 Synthesizer Unlocked.
Page 9 Contents 9. CPU and Disk Drives What You Will Find in This Chapter ..........177 CPU Assembly Overview.
Page 10 Contents Self Tests ............. .227 Calibration Data.
Page 11 How to Order Parts ............278 Shipping a Defective Assembly Back to Keysight Technologies ..... . 279 Assemblies, Cables, and Hardware .
Page 12 Contents Tools Required ............338 Removal Procedure .
Page 13 Contents Removal Procedure ........... . . 369 Replacement Procedure .
Page 14 Contents Replacement Procedure ..........394 A7 Micro-Deck (N5173B/83B only - Option 1EM) .
Page 15 Contents Backup Licenses............423 Restore Factory Waveforms .
Page 16 Contents Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 17 Documentation Overview • Safety Information Installation Guide • Receiving the Instrument • Environmental & Electrical Requirements • Basic Setup • Accessories • Operation Verification • Regulatory Information • Signal Generator Overview User’s Guide • Setting Preferences & Enabling Options • Basic Operation •...
Page 18 • Getting Started with Remote Operation Programming Guide • Using IO Interfaces • Programming Examples • Programming the Status Register System • Creating and Downloading Files • Creating and Downloading User-Data Files • SCPI Basics SCPI Reference • Basic Function Commands •...
Page 19: Overview
Before an Instrument Repair on page 30 After an Instrument Repair on page 31 Instrument Serial Numbers on page 32 Contacting Keysight Technologies on page 33 Returning a Signal Generator for Service on page 34 Lithium Battery Disposal on page 35...
Page 20: Service Manual Revision History
Overview Service Manual Revision History Service Manual Revision History N5180-90059 May 1, 2012 Initial release of the N5171B/72B, N5181B/82B MXG Signal Generators. May 1, 2015 Initial release of the N5173B EXG and N5183B MXG Microwave Analog Signal Generators. February 2018 Added new part information for introduction of new Keysight color palette for external parts (charcoal gray and other gray tones).
Page 21: Before You Start Troubleshooting
Overview Before You Start Troubleshooting Before You Start Troubleshooting Before troubleshooting, complete the following tasks: — Familiarize yourself with the safety symbols marked on the instrument and read the general safety considerations in the front of this guide. — Read the general safety considerations below. —...
Page 22: General Safety Considerations
Overview General Safety Considerations General Safety Considerations The following safety notes apply specifically to signal generators. These notes also appear in other chapters of this service guide as required. These servicing instructions are for use by qualified personal only. To avoid electrical shock, do not perform any servicing unless you are qualified to do so.
Page 23 Overview General Safety Considerations Many of the assemblies in this instrument are very susceptible to damage from electrostatic discharge (ESD). Perform service procedures only at a static-safe workstation and wear a grounding strap. These troubleshooting instructions are for use by qualified personnel.
Page 24: Instrument Options
Overview Instrument Options Instrument Options Table 1-1 Options Description Digital Output Connectivity with N5102A Digital Input Connectivity with N5102A Instrument Security Internal Solid State Memory LO In/Out for Phase Coherency Upgrade BBG memory from 32 Msa to 256 Msa Upgrade BBG memory from 32 Msa to 512 Msa Upgrade BBG memory from 32 Msa to 1 Gsa Upgrade BBG memory from 256 Msa to 512 Msa Upgrade BBG memory from 512 Msa to 1 Gsa...
Page 25 Overview Instrument Options Table 1-1 Options Description Frequency Range - 9 kHz to 1 GHz Frequency Range - 9 kHz to 3 GHz Frequency Range - 9 kHz to 6 GHz Frequency Range - 9 kHz to 13 GHz Frequency Range - 9 kHz to 20 GHz Frequency Range - 9 kHz to 31.8 GHz Frequency Range - 9 kHz to 40 GHz BBG 60 MHz Bandwidth - 32 Msa...
Page 26: Service Equipment You Will Need
Overview Service Equipment You Will Need Service Equipment You Will Need There are certain things that will be required to troubleshoot, adjust, and test the X-Series Signal Sources. They include the following: — Calibration Application Software — Misc Test Equipment Tools you will need Figure 1-1 TORX Tool Hand Tool...
Page 27: Esd Information
Overview ESD Information ESD Information Protection from Electrostatic Discharge Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a static-safe workstation. Figure 1-2 shows an example of a static-safe workstation using two types of ESD protection: —...
Page 28: Electrostatic Discharge (Esd) Protective Supplies
Overview ESD Information Electrostatic Discharge (ESD) Protective Supplies Description Part Number ESD connector end cap front-panel RF output 1401-0247 ESD connector end cap-GPIB 1252-5007 2 X 4 Ft. Antistatic Table Mat with 15 FT. Ground Wire 9300-0797 5 Ft. Grounding Cord (for wrist strap) 9300-0980 Adjustable Antistatic Wrist Strap 9300-1367...
Page 29: Calibration Application Software
Overview ESD Information Calibration Application Software Information regarding the N7822A Calibration Application Software for CXG/EXG/MXG Signal Generators can be found at the following web site: www.keysight.com/find/calibrationsoftware Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 30: Before An Instrument Repair
Overview Before an Instrument Repair Before an Instrument Repair Before replacing any instrument assembly, perform the related Pre-Repair Procedures found in Chapter 16, “Pre and Post-Repair Procedures”. Doing so will ensure that all required instrument information and calibration data will be properly preserved once the assembly replacement is completed.
Page 31: After An Instrument Repair
Overview 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. Most of these tests are done using the N7822A Calibration Application Software for CXG/EXG/MXG Signal Generators.
Page 32: Instrument Serial Numbers
Overview 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. Whenever you contact Keysight about your instrument, have the complete serial number available.
Page 33: Contacting Keysight Technologies
Overview Contacting Keysight Technologies Contacting Keysight Technologies Before contacting Keysight, read the warranty information that is shipped with your signal generator. If your signal generator is covered under a maintenance agreement, be familiar with its terms. Assistance with test and measurements needs, and information on finding a local Keysight office is available on the Web http://www.Keysight.com/find/assist...
Page 34: Returning A Signal Generator For Service
Returning a Signal Generator for Service Use the information in this section if you need to return the signal generator to Keysight Technologies. Packaging the Signal Generator 1. Use the original packaging materials or a strong shipping container that is made of double-walled, corrugated cardboard with 159 kg (350 lb.)
Page 35: Lithium Battery Disposal
When the battery on the A3 RF assembly is exhausted and/or ready for disposal, dispose of it according to your country’s requirements. You can return the battery to your nearest Keysight Technologies Sales and Service office for disposal, if required.
Page 36 Overview Lithium Battery Disposal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 37: Boot Up And Initialization
Keysight Technologies X-Series Signal Generators Service Guide 2 Boot Up and Initialization What You Will Find in This Chapter This chapter provides information on the following: Typical Instrument Boot-up Process Flow on page 38 Potential Problems During Boot Process on page 39...
Page 38: Typical Instrument Boot-Up Process Flow
5. After the instrument is turned on for a few seconds the Keysight Technologies BIOS splash screen is displayed for about 10-15 seconds. If the Keysight Technologies logo is not displayed refer to the “Instrument Display Is Blank”...
Page 39: Potential Problems During Boot Process
Boot Up and Initialization Potential Problems During Boot Process Potential Problems During Boot Process This section describes potential problems that may occur if there is an internal hardware issue that prohibits the instrument from completing a full boot up to the signal generator application.
Page 40: Yellow Standby Front Panel Led Is Not Working
Boot Up and Initialization Potential Problems During Boot Process Yellow Standby Front Panel LED is Not Working The yellow standby LED is controlled by the +5.1 VDC standby line. The +5.1 VDC standby line is supplied by the A1 Power Supply and is routed through the A3 RF assembly to the front panel through ribbon cable W1.
Page 41 Boot Up and Initialization Potential Problems During Boot Process 4. Remove the 4 screws attaching the front frame assembly to the chassis and tilt it down so that you have access to the rear of the A6A1 Front Panel Interface board assembly. 5.
Page 42: Green Power On Front Panel Led Is Not Working
Boot Up and Initialization Potential Problems During Boot Process Green Power On Front Panel LED is Not Working The power on LED is controlled by the +3.35 VD voltage line from the A1 Power Supply. When the instrument is turned on by pressing the A6A3 front panel power switch the +3.35 VDF line is routed through the A3 RF assembly to the front panel through ribbon cable W1.
Page 43 Boot Up and Initialization Potential Problems During Boot Process Figure 2-3 DS311 +3.35 VDF LED Is DS311 on (green)? a. If DS311 is not on go to Chapter 8, “Power Supply” to determine why the +3.35 VDF is not turning on. b.
Page 44: Fans Are Not All Operating
Boot Up and Initialization Potential Problems During Boot Process Fans are Not All Operating The four instrument fans are connected directly to the A1 Power Supply. The fan motors are AC motors, with a DC to AC inverter built into the motor hub. The control, voltage, and filtering for the fans are integrated into the A1 Power Supply.
Page 45: Instrument Display Is Blank
Boot Up and Initialization Potential Problems During Boot Process Instrument Display Is Blank A problem of a blank display 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 46 Boot Up and Initialization Potential Problems During Boot Process Figure 2-5 Connection Expert Instrument Identification Has the instrument been correctly recognized by the Connection Expert? a. If yes, the instrument processor is running and communicating. Proceed to step b. If not, replace the A5 CPU assembly. 7.
Page 47 Boot Up and Initialization Potential Problems During Boot Process 9. In the Command field on the Interactive IO window type :SYST:COMM:LAN:IP? and press Send & Read to retrieve the instrument’s IP address. Is the IP address that is returned valid for your local area network? a.
Page 48 Boot Up and Initialization Potential Problems During Boot Process Figure 2-7 Instrument Internal Web Page 11.To verify that the video controller of the instrument is functioning properly select Signal Generator Web Control from the left side of the screen. After a few moments you should see a new window with a normal instrument display similar to what it shown in Figure...
Page 49 Boot Up and Initialization Potential Problems During Boot Process Figure 2-8 Web Control Instrument Display Does the instrument display look normal through the Web Control interface? a. If yes, the video controller is working properly. Proceed to step b. If not, the video controller is the most likely cause of the problem. Replace the A3 RF Assembly.
Page 50: Instrument Hangs At The Bios Splash Screen
Boot Up and Initialization Potential Problems During Boot Process Instrument Hangs at the BIOS Splash Screen Troubleshooting an issue causing the instrument boot process to hang during the BIOS splash screen is being displayed, or shortly thereafter is going to be limited.
Page 51: Instrument Cannot Completely Load Or Run The Operating System
Boot Up and Initialization Potential Problems During Boot Process Instrument Cannot Completely Load or Run the Operating System If the instrument does not complete the boot process and arrive at the normal instrument display after being turned on it will hopefully just be due to a software issue, so that is what we will try to fix first.
Page 52 Boot Up and Initialization Potential Problems During Boot Process Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 53: Instrument Information And Calibration Data
Keysight Technologies X-Series Signal Generators Service Guide 3 Instrument Information and Calibration Data What You Will Find in This Chapter This chapter provides information on the following: Overview on page 54 Model Number on page 55 Serial Number on page 56...
Page 54: Overview
Instrument Information and Calibration Data Overview Overview There are four types of instrument information that one should be concerned about when an assembly is being removed and replaced. They are: — Model Number — Serial Number — Option Licenses — Calibration Data While the direction given in Chapter 16, “Pre and Post-Repair Procedures”...
Page 55: Model Number
Instrument Information and Calibration Data Model Number Model Number The model number of the instrument is not programmed into it. Every time the instrument boots up it checks to see what hardware is installed and determines from that what its model number should be. If for some reason the model number is not correct it means that there is either a hardware problem somewhere in the instrument or that some of the hardware is not connected properly.
Page 56: Serial Number
Instrument Information and Calibration Data Serial Number Serial Number When an instrument leaves the factory, it has its serial number saved in two different locations along with an encrypted license code. This is saved in the A5 CPU assembly and the A3 RF assembly. Neither location is accessible to the user or service technician.
Page 57: Option Licenses
Instrument Information and Calibration Data Option Licenses Option Licenses Option licenses are stored in two different locations in the instrument, the A5 CPU assembly and the A3 RF assembly. However, the instrument will only use those that are in the A5 CPU assembly. The licenses in the A3 RF assembly are for backup purposes only.
Page 58 Instrument Information and Calibration Data Option Licenses Figure 3-1 Service Boot Screen 6. Using the front panel arrow keys scroll down to Start main firmware service menu and press Select. 7. When the service menu warning screen is displayed press Continue. 8.
Page 59: Backup Licenses
Instrument Information and Calibration Data Option Licenses Backup Licenses If the A3 RF assembly is replaced the licenses that are in the A5 CPU memory will need to be backed up to the backup storage location in the new A3 RF assembly so that there will be a copy of them in case the A5 CPU assembly should ever need replacement.
Page 60 Instrument Information and Calibration Data Option Licenses 10.The instrument will copy the licenses from the A5 CPU memory to the backup location on the new A3 RF assembly and load the instrument firmware. 11.If the error listed above is seen at this point cycle the instrument power once more and it should then be gone.
Page 61: Calibration Data
Instrument Information and Calibration Data Calibration Data Calibration Data Instrument calibration data is stored in three different location types: 1. Factory Calibration Data - Non-volatile memory on the assembly for which it is intended. 2. Working Data - Volatile memory on the A5 CPU. 3.
Page 62: What Happens At Boot Up
Instrument Information and Calibration Data Calibration Data After an instrument adjustment is performed the adjustment data can be saved to overwrite data. If an overwrite data file does not already exist for the assembly being adjusted one will be created at that time. The only data that will be written to the overwrite data file is the arrays that were changed from the factory values during the adjustment.
Page 63 Instrument Information and Calibration Data Calibration Data A restore needs to be performed whenever an assembly with factory calibration data saved on it is installed during a repair. This can also be useful if adjustments have been performed, but not yet backed up, and for some reason the data needs to be removed and have the instrument revert to the factory calibration data.
Page 64 Instrument Information and Calibration Data Calibration Data Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 65: Self Test
Keysight Technologies X-Series Signal Generators Service Guide 4 Self Test What You Will Find in This Chapter This chapter provides information on the following: Self Test Overview on page 66 Limits on page 67 Multiple Failures on page 68 Running Self Test on page 69...
Page 66: Self Test Overview
Self Test Self Test Overview Self Test Overview Self Tests are a series of internal tests designed as a diagnostic tool to check instrument hardware functionality and basic performance under controlled conditions. If the test results fall within predetermined limits a pass is reported. Self Tests do not require the signal generator to be adjusted before they will pass.
Page 67: Limits
Self Test Limits Limits Self Test limits are initially loaded into the signal generator at the factory. However, the limits are updated as needed when the instrument firmware is updated. If for some reasons the Self Test limits are missing, reinstall the instrument firmware to reload them.
Page 68: Multiple Failures
Self Test Multiple Failures Multiple Failures If more than one test result falls outside the limits, the Self Test routine evaluates the failures and reports the most likely cause of the failure. This can best be understood by using the following hypothetical example: —...
Page 69: Running Self Test
Self Test Running Self Test Running Self Test The Self Tests can all be run at once or one test at a time. For the purpose of initial troubleshooting of an instrument it is highly recommend that they all be run at once to let the instrument evaluate which failure, if any, is the most significant.
Page 70 Self Test Running Self Test Figure 4-2 Initial Self Test Message If self test takes longer than 10 minutes to complete, go to Chapter 8, “Power Supply” to troubleshoot a possible power supply failure. 4. Press Run Complete Self Test. An activity bar displays on the screen indicating the test progress.
Page 71 Self Test Running Self Test Figure 4-4 All Self Tests Passed Message Figure 4-5 Self Test Failure Message If the signal generator fails only one test, the number of the failed test displays. If the signal generator fails more than one test, the test number of the most likely cause of the failure displays, as shown in Figure 4-5.
Page 72 Self Test Running Self Test Table 4-1 Self Tests Self Test Failure Number Resolution 100 Digital Self Tests Replace the A3 RF assembly Go to “Troubleshooting Self Test 102” on page 90 Go to “Power Supply Status Quick-Check” Chapter 8, “Power Supply.”...
Page 73 Self Test Running Self Test Table 4-1 Self Tests Self Test Failure Number Resolution Go to “Troubleshooting Self Test 704” on page 91 800 BB Analog Baseband Self Tests 801 - 804 Replace the A2 Vector Module 900 BB RF Self Tests 901 - 905 Go to “Troubleshooting Self Test 901 to 905”...
Page 74: Self Test Descriptions
Self Test Self Test Descriptions Self Test Descriptions 100 Digital Self Tests The Digital Self Tests are designed to test the digital section of the A3 RF assembly. 101 Digital FPGA Checks This test checks the ability to communicate properly with the three FPGAs situated on the A3 RF assembly.
Page 75: 300 Synthesizer Self Tests
Self Test Self Test Descriptions 204 Internal Oscillator Check This test checks the proper operation of the internal 10MHz reference oscillator. For triple-loop boards, the 10MHz reference oscillator is an OCXO. For single-loop boards, the 10MHz reference oscillator is a TCXO. This test adjusts the tune DAC to nudge the internal 10MHz reference.
Page 76 Self Test Self Test Descriptions 303 Offset VCO Detector (MXG) This test checks that the offset VCO outputs a signal at various tuning voltages and that the power can be detected downstream with a power detector. The VCO should be able to oscillate from a tuning voltage of around -0.3V to over +16V.
Page 77 Self Test Self Test Descriptions 312 Sum VCO Detector This test checks that the sum VCO outputs a signal at various tuning voltages. This test is performed with the sum loop opened. 313 Sum Attenuator (MXG) This test checks that the adjustable sum attenuator is working properly. The sum VCO is first set to open loop mode.
Page 78: 400 Output Self Tests
Self Test Self Test Descriptions 400 Output Self Tests The Output Self Tests are designed to test the output RF section as well as the ALC section of the A3 RF assembly. 401 Output Voltages This test checks some supply voltages as well as bias voltages on the FET amplifiers within the output section to ensure that they are properly biased.
Page 79: 500 Modulation Self Tests
Self Test Self Test Descriptions 409 ALC Detector Offset (Model N5166B, N5171B, N5172B, N5181B, N5182B) This test checks that the ALC Detector Offset DAC can properly adjust the ALC logger circuitry. This test is performed in open-loop mode. The RF is minimized by setting the ALC Mod DACs appropriately.
Page 80: 600 Attenuator Self Tests
Self Test Self Test Descriptions 503 FM DACs (Option UNT) This test checks that the FM DACs are working. The output of each DAC is connected directly to the ABUS. The test sets each FM DAC to output various DC levels and measures the resultant voltage. 504 FM Attenuators (Option UNT) This test checks that the FM attenuators are working.
Page 81: Bb Digital Self Tests (Model N5166B, N5172B, N5182B)
Self Test Self Test Descriptions 603 RPP Trip Status (Model N5166B, N5171B, N5172B, N5181B, N5182B) This test makes sure that the RPP is not tripped. In normal operation, the RPP should never be tripped. 700 BB Digital Self Tests (Model N5166B, N5172B, N5182B) The BB Digital Self Tests are designed to test the digital section of the A2 Baseband Generator assembly.
Page 82: Bb Analog Baseband Self Tests (Model N5166B, N5172B, N5182B)
Self Test Self Test Descriptions 707 User Clock Test (Option 653, 655, 656, or 657) This test checks the user clock functionality on the A2 Baseband Generator assembly. The user clock is generated digitally from within DSP and is recreated with the user clock DAC. The ARB must be turned on for the user clock to be functional.
Page 83: 1100 Mw Alc Self Tests (Model N5173B, N5183B)
Self Test Self Test Descriptions 902 Quadrature DAC This test checks the quadrature loop circuitry on the A2 Baseband Generator assembly. 903 IQ Modulation This test checks the ability of the IQ modulator to modulate a signal on the RF path.
Page 84 Self Test Self Test Descriptions 1103 MW ALC Level This test checks the ALC Level DAC and related circuitry. 1104 MW ALC Modulation HB This test checks the High-Band ALC modulation driver circuitry. This test runs in open-loop mode so that the integrator will not contribute to this test. In addition, the RF is turned OFF during this test using the pulse modulator;...
Page 85: 1200 Mw Multiplier Self Tests (Model N5173B, N5183B)
Self Test Self Test Descriptions otherwise cause offset errors. The Bulk R errors are most evident at high ALC detector levels. Therefore, the RF power is set high for an ALC Detector voltage of -1.5V by adjusting the ALC MOD Offset DAC. 1110 MW ALC Log BreakPoint This test checks that the ALC Log Break Point DAC can properly adjust the ALC logger circuitry, and ultimately, the RF power.
Page 86: 1300 Mw Mod Filter Self Tests (Model N5173B, N5183B)
Self Test Self Test Descriptions 1203 MW Multiplier Second Attenuator This test checks the performance of the multiplier second attenuator by referencing key attenuations states against the 0dB (thru) setting. The input detector is switched in to measure the 0 dB state. This measured voltage is then used as a reference for switching in and measuring subsequent attenuations states.
Page 87: 1400 Mw 40Ghz Doubler Self Tests (Model N5173B, N5183B With Option 532 Or 540)
Self Test Self Test Descriptions 1304 MW Mod Filter RF Paths This test checks the filter paths through the A7A3 Mod Filter assembly. Various frequencies within a band, typically at each end and in the middle, are checked against known input levels. Discrepancies with filter paths are verified through absolute and delta voltage measurements.
Page 88 Self Test Self Test Descriptions 1505 Apps FPGA - QDR Memory Test This test checks the QDR SRAM memory chips that are connected to the Apps SX FPGAs. All of the testing is performed internally from a state machine within the SX FPGAs.
Page 89 Self Test Self Test Descriptions 1512 RT – BB FBI This test checks the flexible bus interface (FBI) line for connectivity from the A2 Baseband Generator to the A7 Real Time Baseband Generator assembly. The FBI line consists of a differential pair of signals. The FBI line originate from the A2 Baseband Generator assembly ARB FPGA and goes to the A7 Real Time Baseband Generator assembly FX FPGA.
Page 90: Troubleshooting Self Test 102
Self Test Troubleshooting Self Test 102 Troubleshooting Self Test 102 A self test 102 failure can be caused by a number of possible causes; A1 Power Supply, A2 Vector, or the A3 RF assembly. Self test 102 is the JTAG Chain check (Joint Test Action Group).
Page 91: Troubleshooting Self Test 704
Self Test Troubleshooting Self Test 704 Troubleshooting Self Test 704 Self test 704 validates the 100 MHz Reference clock signal that originates on the A3 RF assembly and is the clock pulse for the ARB FPGA on the A2 Vector assembly.
Page 92: Troubleshooting Self Test 901 To 905
Self Test Troubleshooting Self Test 901 to 905 Troubleshooting Self Test 901 to 905 These self tests validate the LO signal from the output of the synthesizer section of the A3 RF assembly. There is circuitry on the A3 RF assembly that cannot be isolated specifically to the A3 RF assembly by self tests, including the associated vertical SMA connector (J2004) that is on the A3 RF assembly.
Page 93 Self Test Troubleshooting Self Test 901 to 905 8. Set up the generator: a. Press Preset b. Press Frequency and set to 1 GHz c. Press I/Q, and set I/Q to On 9. The output signal frequency from J2004 should be 1 GHz at 0 dBm ±5 dB . 10.Repeat steps 7b and 8b for frequencies 2, 3, 4, 5 and 6 GHz.
Page 94: Troubleshooting Self Test 1105
Self Test Troubleshooting Self Test 1105 Troubleshooting Self Test 1105 A self test 1105 failure can be caused by the A3 RF assembly or the A7 Micro Deck. The following procedure will help identify the defective assembly. 1. After running a complete self test, where self test 1105 failed, press View Test Info.
Page 95 Self Test Troubleshooting Self Test 1105 —If the power level is NOT as expected at all frequencies, replace the A3 RF assembly. Depending on the interaction of the ALC circuit, the measured output power may increase as the frequencies increase. Frequencies above 2 GHz are controlled by the High Band ALC detector and will not be visible when making measurements in the Low Band ALC detector range.
Page 96: Self Tests Do Not Run Or Self Tests Run Slowly
Self Test Self Tests Do Not Run or Self Tests Run Slowly Self Tests Do Not Run or Self Tests Run Slowly If self tests will not run or run slowly, the most likely cause is a faulty A1 Power Supply or A5 CPU assembly.
Page 97: Service And Utility Menus
Keysight Technologies X-Series Signal Generators Service Guide 5 Service and Utility Menus What You Will Find in This Chapter This chapter provides information on the following: Service and Utility Menus Overview on page 98 Boot Service Menu on page 99...
Page 98: Service And Utility Menus Overview
Service and Utility Menus Service and Utility Menus Overview Service and Utility Menus Overview Service Menus There are two areas in the instrument that have service menus that will be covered in this chapter. They are: — Boot Service Menu —...
Page 99: Boot Service Menu
Service and Utility Menus Boot Service Menu Boot Service Menu The boot service menu is accessed when the instrument is first turned on and allows the selection of several service related utilities. To enter the boot service menu: 1. Turn the instrument off by using the front panel power button. 2.
Page 100 Service and Utility Menus Boot Service Menu When the instrument boots up in firmware recovery mode the display will appear as shown in Figure 5-2. At this point the instrument firmware can be loaded. If selected by accident, reboot the instrument to return it to normal operation. Use this feature if the normal instrument firmware installation process will not work.
Page 101 Service and Utility Menus Boot Service Menu -256, File name not found; /USER/PTRAIN/LAST The instrument will correct these errors after the power is cycled again. However, the instrument will not be able to recover from the following error by itself: -310, System error;...
Page 102: Main Firmware Service Menu
Service and Utility Menus Main Firmware Service Menu Main Firmware Service Menu The Main Firmware Service Menu that is accessed through the boot service menu provides for the following functions: — Boot while ignoring user or last state, or without persistent state —...
Page 103: Recovery Mode
Service and Utility Menus Main Firmware Service Menu Figure 5-5 Main Firmware Service Menu, Page 2 Figure 5-6 Main Firmware Service Menu, Page 3 Figure 5-7 Main Firmware Service Menu, Page 4 These menu selections are: Recovery Mode This will start the recovery firmware. This is used for recovery of corrupted firmware and/or FPGA images.
Page 104: Bootup In Factory Preset State (Ignore Last/User State)
Service and Utility Menus Main Firmware Service Menu If selected by accident, reboot the instrument to return it to normal operation. Use this feature if the normal firmware installation process will not work. See Chapter 19, “Instrument Firmware and Operating System” for information on how to reinstall the instrument firmware.
Page 105: Boot In No Hardware Mode
Service and Utility Menus Main Firmware Service Menu Boot in no hardware mode Starts the instrument firmware without support for the hardware. This will result in multiple error messages stating that hardware could not be found. Preset persistent state Deletes the instrument persistent state. Performs the same function as the Restore System Settings to Default Values function under the Utility, Power On / Preset menu.
Page 106: Done
Service and Utility Menus Main Firmware Service Menu — Power Verify — ALC Modulator Bias Adjustment Done Executes the selected service menu function(s) and loads the instrument firmware. Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 107: Utility Service Menu
Service and Utility Menus Utility Service Menu Utility Service Menu The Utility menu provides access to many different functions, not all are service related. In this section, only the service related functions will be covered. Information on the rest can be found in the instrument User’s Guide. Figure 5-8 Utility Menu I/O Config...
Page 108 Service and Utility Menus Utility Service Menu Time/Date This is used to set the time and date of the instrument. The user is expected to adjust this to their specific time zone. For servicing, this needs to be set if the A3BT1 Backup Battery is replaced during servicing.
Page 109: Display
Service and Utility Menus Utility Service Menu Ref Oscillator Tune This adjustment is intended for use by the user to make any fine tuning they would like to the frequency output of the instrument. This adjustment is not the same as the Reference Internal Standard Calibration provided with the Performance Verification and Adjustment software for servicing the instrument.
Page 110 Service and Utility Menus Utility Service Menu — System memory size and usage — And more… Figure 5-11 Diagnostic Info Screen RPP Trip Log This information is only for N5166B, N5171B, N5172B, N5181B, and N5182B instruments. If the instrument reverse power protection has ever been tripped, information on the circumstances of the trip can be found here.
Page 111 Service and Utility Menus Utility Service Menu Installed Board Info This is a list of the installed board assembly information. The assemblies listed here will vary depending on the model number and options installed. Figure 5-12 is an example of a typical Installed Board Info screen. Figure 5-12 Typical Installed Board Information The part numbers of the assemblies on this screen will most likely not match...
Page 112 Service and Utility Menus Utility Service Menu Table 5-1 Possible Installed Assembly Part Numbers Assembly Part # N5180-60203 N5180-60239 N5180-60279 N5180-60173 N5180-60150 N5180-60238 N5180-60278 N5180-60151 N5180-60145 N5180-60280 0950-2870 0950-3295 N5180-60172 RT App Front Panel N5180-60158 a. If the installed assembly is a refurbished assembly it could be a -69xxx part number instead of -60xxx.
Page 113 Service and Utility Menus Utility Service Menu Figure 5-13 Front Panel Tests Menu Pixel Test The Pixel Test verifies that the pixels in the liquid crystal display all function properly. Cycle through the different colors and verify that all pixels display the corresponding color.
Page 114: Service
Service and Utility Menus Utility Service Menu Service The service menu contains functions that are needed to complete assembly replacements. Remove Assembly The idea behind the Remove Assembly menu, and all the “Prepare” functions within it, was to do any data transfer needed before removing an assembly that needed to be replaced.
Page 115 Service and Utility Menus Utility Service Menu Figure 5-14 Service Menu Remove and Install Assemblies Install Assembly The “Finalize” routines contained within the Install Assembly menu are meant to perform certain required tasks after one of the assemblies listed is replaced. These assemblies include the following: —...
Page 116 Service and Utility Menus Utility Service Menu N5172B N5182B For the rest of the models in this series, and other assemblies for the models listed above, nothing has ever been implemented for these function, so there currently is no use of this menu for them. For information on when these routines should be run see Chapter 16, “Pre and Post-Repair...
Page 117 Service and Utility Menus Utility Service Menu While there may be other sensors that meet the required parameters, the recommended USB power sensors are shown in Table 5-2. When using one of these USB power sensors it will take approximately 1 hour for them all to complete.
Page 118 Service and Utility Menus Utility Service Menu adjustment will take to complete. Because of this, the recommended connection type is USB. When selecting a power meter/sensor to use for this adjustment the following parameters need to be considered: Frequency Range: 10 MHz to 6 GHz Power Level: -70 to +20 dBm While there may be other sensors that meet the required parameters, the recommended USB power sensors are shown in...
Page 119 Service and Utility Menus Utility Service Menu Figure 5-15 Power Verify and Managed Code Control Service Menu Managed Code Control This control allows the disabling of the application and test software within the instrument. App Harness The application harness is only used in the N5172B and N5182B instruments, as it supports the use of certain real-time digital modulation applications.
Page 120 Service and Utility Menus Utility Service Menu If the App Harness is turned Off the instrument power will need to be cycled for it to come back on. If for some reason this software appears to be corrupt reload the instrument firmware to reinstall the App Harness software.
Page 121 Service and Utility Menus Utility Service Menu As shown in Figure 5-17, once one of these calibrations has been run the date of the calibration will be displayed on the screen for this menu. If there is no date displayed in the menu the Factory Calibration selection will not be available and the Enhanced Factory Calibration will need to be run.
Page 122 Service and Utility Menus Utility Service Menu —IQ Skew Calibration —IQ Internal Channel Correction Fine Calibration —IQ Internal Channel Correction Calibration PM These adjustments are built into the instrument calibration and test ¼ harness. It will take approximately 1 hours for these adjustments to complete, depending on the power meter/sensor used.
Page 123 Service and Utility Menus Utility Service Menu These adjustments are built into the instrument calibration and test harness. It will take approximately ½ an hour for these adjustments to complete, depending on the power meter/sensor used. Once this routine is started it cannot be paused, only aborted.
Page 124 Service and Utility Menus Utility Service Menu Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 125: Troubleshooting
Keysight Technologies X-Series Signal Generators Service Guide 6 Troubleshooting What You Will Find in This Chapter This chapter provides information on the following: Overview on page 126 Power On Issues on page 126 Communication Issues on page 127 Unlocked Issues on page 130...
Page 126: Overview
Troubleshooting Overview Overview This chapter is intended to address some of the most common failures. While not all the answers may be found here, the information contained in this chapter should give some guidance that will allow a skilled technician to isolate the assembly at fault.
Page 127: Communication Issues
Troubleshooting Communication Issues Communication Issues There are several different communication ports that the instrument can use for remote control and communication. They are: — GPIB — LAN — USB There are also USB ports on both the front and rear of the instrument that can be used to connect memory devices to.
Page 128: Usb
Troubleshooting Communication Issues 3. Verify that the instrument IP address is set to the same address that the PC trying to communicate with it is using by pressing Utility, I/O Config, LAN Setup. 4. Verify that the PC attempting to communicate with the instrument can identify it using the Keysight Connection Expert.
Page 129 Troubleshooting Communication Issues 1. Insert the flash memory device into a PC and verify that it has a FAT file system. 2. Try a different FAT file system flash memory device from a different manufacturer in the instrument, as not all flash memory devices are compatible.
Page 130: Unlocked Issues
Troubleshooting Unlocked Issues Unlocked Issues There are two basic types of phase detector unlock errors that the instrument could have; reference unlock and synthesizer unlock. The reference unlock error number is 512 while the synthesizer unlocks are 508. There is only one 512 reference unlock error and 5 possible 508 synthesizer unlock errors.
Page 131: 508 Synthesizer Unlocked
Troubleshooting Unlocked Issues Internal Reference Unlocked Use the following procedure to troubleshoot a 512 Reference Unlocked error when using the internal frequency reference oscillator: 1. Disconnect any cable attached to the REF IN port on the rear panel of the instrument.
Page 132 Troubleshooting Unlocked Issues phase lock loops to be unlocked. In this case both the reference and the synthesizer unlock error messages would be present. So before troubleshooting a synthesizer unlocked condition make sure that there is no reference unlock error. If there is, resolve the reference unlock condition first. For the CXG and EXG series instruments there are two possible synthesizer unlock errors: —...
Page 133 Troubleshooting Unlocked Issues Table 6-1 Applicable Adjustments for Synthesizer Unlocks Loop Unlocked Adjustments to Run FracN Synthesizer FracN KV Calibration Offset Synthesizer Offset Pretune Calibration Synthesizer Offset KV Calibration Synthesizer Sum Pretune Calibration Synthesizer Sum Attenuation Calibration Synthesizer Sum KV Calibration a.
Page 134: Unleveled Issues
Troubleshooting Unleveled Issues Unleveled Issues An Automatic Leveling Control (ALC) loop in the instrument provides leveled output power. The ALC loop is a feedback control system that monitors the RF power and maintains it at the user-selected level. The RF path must provide a minimum power level to the ALC loop for the ALC loop to work correctly.
Page 135: N5171B, N5181B
Troubleshooting Unleveled Issues Since the hardware within the ALC loop differs by instrument model, follow the troubleshooting procedure below for the instrument being serviced. N5171B, N5181B These instruments do not have any other assembly inside the ALC loop other than the A3 RF assembly. So, the ALC detectors, the ALC control, and the ALC modulators are all located on the A3 RF assembly.
Page 136 Troubleshooting Unleveled Issues 5. Run the following adjustments: ALC Linearity Calibration Absolute Power Calibration ALC Calibration 6. If the adjustments fail or the unlevel condition persists, replace the A3 RF assembly. I/Q Modulator Unlevel If the I/Q modulator is turned on without a modulating signal, either from the internal A2 Vector BBG assembly or from the front panel I or Q Inputs, the instrument will display an unlevel condition when the RF power is turned On.
Page 137: N5173B, N5183B
Troubleshooting Unleveled Issues Figure 6-1 I/Q Modulator Cable and Port Locations 9. Inspect both W7 (W14, W15, and W16 if option 012 is installed) and W8 and replace them if any damage is detected. If the cables are not damaged, or new ones do not resolve the unlevel condition, proceed to step 12.
Page 138 Troubleshooting Unleveled Issues 5 MHz to <2.0 GHz 2.0 GHz to <3.2 GHz 3.2 GHz to Maximum Frequency limit 5 MHz to <2.0 GHz In this frequency range both the ALC detector and modulators used are located on the A3 RF assembly. However, the ALC reference DAC, integrator, and summing amplifier are all located on the A7A1 Microwave ALC control assembly.
Page 139 Troubleshooting Unleveled Issues Figure 6-2 Less Than 3.2 GHz Internal ALC Leveling Loops 8. Connect a spectrum analyzer to A3 J2002 with the following settings: — Center Frequency = 1 GHz — Span = 20 MHz — Reference Level = +20.0 dBm 9.
Page 140 Troubleshooting Unleveled Issues — If the DC voltage does not measure at least +10V proceed to step 14. 12.Adjust the power level of the signal generator to -20 dBm by pressing AMPTD, -20 dBm. 13.Verify that the DC voltage measured at the output of W23 measures -8V or less: —...
Page 141 Troubleshooting Unleveled Issues 6. Verify that the Set Atten setting is set to 0 dB. 7. Referring to Figure 6-2, remove W20 from A3 J2002. 8. Connect a spectrum analyzer to A3 J2002 through a 20 dB attenuator with the following settings: —...
Page 142 Troubleshooting Unleveled Issues 1. Return the instrument to a known state by pressing Preset. 2. Tune the signal generator to a frequency that is causing the unlevel condition by pressing FREQ, <frequency> GHz. 3. Turn the RF on by pressing RF On/Off so that the LED below it comes on. 4.
Page 143 Troubleshooting Unleveled Issues be calculated by dividing the signal generator output frequency by the multiplier that it uses. The multipliers for the different frequency ranges in this band are listed in Table 6-3. 8. Calculate the spectrum analyzer center frequency by dividing the signal generator output frequency by the corresponding multiplier listed in Table 6-3.
Page 144 Troubleshooting Unleveled Issues Figure 6-4 External ALC Leveling Loop 3. Return the instrument to a known state by pressing Preset. 4. Tune the signal generator to a frequency that is causing the unlevel condition by pressing FREQ, <frequency> GHz. 5. Connect the RF output of the signal generator to the input of a spectrum analyzer with the following settings: —...
Page 145 Troubleshooting Unleveled Issues 9. If the external ALC loop is functioning properly the unlevel indicator should not be on at this point and the signal level on the spectrum analyzer should be somewhere near 0 dBm. — If the signal level is not correct or the unlevel condition remains, proceed to step 10.
Page 146: Maximum Power Out Check
Troubleshooting Maximum Power Out Check Maximum Power Out Check Perform the following procedure to verify that the instrument is capable of providing the maximum power output level required: 1. Return the instrument to a known state by pressing Preset. 2. Turn the ALC loop Off by pressing AMPTD and set ALC to Off. 3.
Page 147 Troubleshooting Maximum Power Out Check Table 6-5 N5181B, N5182B Maximum Power Level Frequency Range Standard Option 1EA >5 GHz to 6 GHz +16 dBm +18 dBm Table 6-6 N5173B, N5183B Maximum Power Level (Option 513, 520) Frequency Range Standard Option 1EA 9 kHz to 3.2 GHz +18 dBm +23 dBm...
Page 148: Rear Panel Bnc Connectors
Troubleshooting Rear Panel BNC Connectors Rear Panel BNC Connectors There are many different rear panel BNC connectors that provide many different instrument functions. While the performance verification tests, as well as the Self Tests, do not test the functionality of these, the user may report that one or more of these functions is not working properly.
Page 149 Troubleshooting Rear Panel BNC Connectors Table 6-8 Rear Panel BNC Connector versus Chapter Connectors Verification Procedure Location Chapter 12, “Baseband Generators” A2 Vector BBG Assembly A3 RF Assembly Chapter 10, “RF Assembly” A7 Micro-Deck Assembly Chapter 11, “Micro-Deck Assembly” Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 150: Amplitude Modulation Issues (Option Unt)
Troubleshooting Amplitude Modulation Issues (Option UNT) Amplitude Modulation Issues (Option UNT) Depending on the instrument model number a problem with amplitude modulation could be caused by different assemblies due to the different hardware configurations. Refer to the section below for the model number being serviced for information on isolating the cause of the problem.
Page 151 Troubleshooting Amplitude Modulation Issues (Option UNT) AM Calibration If the failure persists after the adjustment replace the A3 RF assembly. 3.2 GHz to Max Frequency Since the amplitude modulation generator and the modulator used for amplitude modulation in this frequency range are not contained on the same assembly the issue will need to be isolated to the assembly causing the problem.
Page 152 Troubleshooting Amplitude Modulation Issues (Option UNT) Figure 6-8 Amplitude Modulation Drive Location – A7A1 Test Point 40 11.Setup the oscilloscope as follows: — Amplitude scale = 500 mv/div — Horizontal scale = 1 ms/div 12.A signal like that shown in Figure 6-9 should be seen on the oscilloscope screen.
Page 153 Troubleshooting Amplitude Modulation Issues (Option UNT) If the measured voltage is greater than or equal to 2.5 Vpp replace the A7 Micro Deck assembly. 14.Run the following adjustment: AM Calibration If the failure persists after the adjustment replace the A3 RF assembly. Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 154: Pulse Modulation Issues (Option Unw)
Troubleshooting Pulse Modulation Issues (Option UNW) Pulse Modulation Issues (Option UNW) Depending on the instrument model number a problem with pulse modulation could be caused by different assemblies due to the different hardware configurations. Refer to the section below for the model number being serviced for information on isolating the cause of the problem.
Page 155 Troubleshooting Pulse Modulation Issues (Option UNW) 4. Set the signal level to 0 dBm by pressing AMPTD, 0 dBm. 5. Set the Pulse Width to 2 µsec by pressing Pulse, Pulse Width, 2 µsec. 6. Set the Pulse Period to 4 µsec by pressing Pulse Period, 4 µsec. 7.
Page 156 Troubleshooting Pulse Modulation Issues (Option UNW) Figure 6-11 Pulse Modulation Drive Signal – A7A1 U77 Pin 2 12.If either no signal is seen on the oscilloscope, the level is less than 3.2 Vpp, the period is not 4 µs, or the pulse width is not 2 µs, replace the A3 RF assembly.
Page 157: Front Panel Assembly
Keysight Technologies X-Series Signal Generators Service Guide Front Panel Assembly What You Will Find in This Chapter This chapter provides information on the following: Assembly Overview on page 158 Troubleshooting on page 161...
Page 158: Assembly Overview
Front Panel Assembly Assembly Overview Assembly Overview The A6 Front Panel assembly contains most of the user interface to the instrument. This includes the: — Power Switch — Display — Keyboard — USB Interface — Front Panel Interface Power Switch The front panel power switch is a momentary switch that is located on the A6A3 Power Switch assembly.
Page 159: Usb Interface
Front Panel Assembly Assembly Overview The Rotary Pulse Generator (RPG) is also located on the A6A4 Keyboard assembly. As the RPG is rotated it generates pulses. The faster it is rotated the narrower the pulses it generates. The pulses are routed to the keyboard controller on the A6A1 Front Panel Interface board, and then to the A5 CPU assembly via the USB hub located on the A6A1 Front Panel Interface board.
Page 160 Front Panel Assembly Assembly Overview The A6A1 Front Panel Interface board handles all the communication between the user interface functions listed previously in this chapter and the rest of the instrument. The circuits contained on this board include: — Four Port USB Hub (only 3 are used) —...
Page 161: Troubleshooting
Front Panel Assembly Troubleshooting Troubleshooting While the entire A6 Front Panel assembly can be replaced as one unit, it is much more cost effective, and highly recommended, to only replace the lower level assembly responsible for a given failure. To provide access to the internal circuitry required to perform the troubleshooting procedures in this section the instrument outer cover and inner bottom cover will first need to be removed.
Page 162 Front Panel Assembly Troubleshooting RPG Failures If there is an RPG failure and the front panel key test passes the problem is most likely either the A6A4 Keyboard, the A6A1 Front Panel Interface board, or the ribbon cable W3 that connects them together. To isolate the problem, use the following procedure: 1.
Page 163: Usb Interface Not Working
Front Panel Assembly Troubleshooting LED Blink Test Failures If any of the front panel status LEDs do not work use the following procedure to isolate the problem: 1. Remove the front panel from the instrument while leaving W1 connected to both the instrument and the front panel assembly. See Chapter 15, “Assembly Replacement,”...
Page 164 Front Panel Assembly Troubleshooting The status of the initialization routine can be verified by observing the status LEDs provided on the A6A1 Front Panel Interface board. The normal operation of these LEDs can be seen in Table 7-3. Table 7-3 A6A1 Front Panel Interface Status LEDs Function Normal Operation...
Page 165: Supply Voltages
Front Panel Assembly Troubleshooting If any of the LEDs are not behaving as described, proceed to the next section to verify that the A6A1 Front Panel Interface board has the correct power supply voltages. Supply Voltages There are only two instrument DC power supply voltages used by the A6A1 Front Panel Interface board.
Page 166 Front Panel Assembly Troubleshooting Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 167: Power Supply
Keysight Technologies X-Series Signal Generators Service Guide Power Supply What You Will Find in This Chapter This chapter provides information on the following: — Assembly Overview on page 168 Troubleshooting on page 170...
Page 168: Assembly Overview
Power Supply Assembly Overview Assembly Overview There are no user replaceable components inside the A1 Power Supply assembly. There are also voltage levels within it that could be hazardous to your health. As such, the cover on the A1 Power Supply assembly should NEVER be removed and no probes or anything else of any kind should ever be inserted into it, whether there is power applied to it or not.
Page 169: Instrument Turn On
Power Supply Assembly Overview All analog voltages (VA) are referenced to the analog common (ACOM), and all digital voltages (VD) are referenced to the digital common (DCOM). The +5.1 VSB supply is reference to the digital common. The A1 Power Supply assembly also provides the following outputs: —...
Page 170: Troubleshooting
Power Supply Troubleshooting Troubleshooting To allow the power supplies to discharge, wait 30 seconds after unplugging the instrument before removing or installing any covers or assemblies. To provide access to the internal circuitry required to perform the troubleshooting procedures in this section the instrument outer cover and inner bottom cover will first need to be removed.
Page 171 Power Supply Troubleshooting Figure 8-1 Power On Shortcuts Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 172: Power Supply Status Quick-Check
Power Supply Troubleshooting Power Supply Status Quick-Check For a quick check of the status of all the DC voltages refer to Table 8-2 Figure 8-2 for a visual check of the supply voltages with the use of LEDs on the A3 RF assembly.
Page 173: Measure Voltage Levels
Power Supply Troubleshooting Figure 8-2 Power Supply Voltage LED Locations If any of the LEDs are not on when they should be, go to the “Measure Voltage Levels” section in this chapter to verify that the problem is the A1 Power Supply and not the filtering on the A3 RF assembly.
Page 174 Power Supply Troubleshooting Figure 8-3 A1 Power Supply Connector at A3 J10 Table 8-3 Power Supply Connector Voltage Levels −15VA −15VA −15VA −15VA ACOM +32VA ACOM ACOM ACOM ACOM ACOM ACOM +15VA +15VA +15VA +15VA +15VA +15VA ACOM ACOM ACOM ACOM ACOM ACOM...
Page 175 Power Supply Troubleshooting Table 8-3 Power Supply Connector Voltage Levels ACOM ACOM ACOM ACOM ACOM ACOM −7VA −7VA −7VA −7VA −7VA −7VA_SENSE ACOM ACOM ACOM ACOM ACOM ACOM_SENSE DCOM DCOM DCOM DCOM DCOM DCOM_SENSE N.C. +12VD +12VD +12VD +12VD +12VD DCOM DCOM DCOM...
Page 176 Power Supply Troubleshooting Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 177: Cpu And Disk Drives
Keysight Technologies X-Series Signal Generators Service Guide CPU and Disk Drives What You Will Find in This Chapter This chapter provides information on the following: CPU Assembly Overview on page 178 Disk Drive Assembly Overview on page 180 CPU Troubleshooting on page 181...
Page 178: Cpu Assembly Overview
CPU and Disk Drives CPU Assembly Overview CPU Assembly Overview The A5 CPU assembly contains an Intel Atom processor running a Win CE operating system. It controls all activities in the signal generator and translates information entered from the front panel keys as well as remote communication, such as LAN, GPIB, USB, and communicates the necessary instructions on the internal buses to the instrument hardware.
Page 179 CPU and Disk Drives CPU Assembly Overview Figure 9-2 Diagnostic Info Screen Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 180: Disk Drive Assembly Overview
CPU and Disk Drives Disk Drive Assembly Overview Disk Drive Assembly Overview The A4 Solid State Disk Drive is only installed in the N5166B, N5172B, and N5182B instruments. A small portion of it is used for the storage of instrument real-time application software, while the majority of the drive is reserved for user data files.
Page 181: Cpu Troubleshooting
CPU and Disk Drives CPU Troubleshooting CPU Troubleshooting CPU failures could manifest themselves in a broad range of failure symptoms. If there is a CPU assembly failure some of the possible symptoms could be: — Instrument will not boot up —...
Page 182: Communication Failure To Internal Assemblies
CPU and Disk Drives CPU Troubleshooting Communication failure to internal assemblies Make sure that the connections to each of the internal assemblies is solid and tight. When some assemblies are replaced others can become slightly dislodged, causing communication errors, and assemblies to fail to be identified.
Page 183: Disk Drive Troubleshooting
CPU and Disk Drives Disk Drive Troubleshooting Disk Drive Troubleshooting Disk Drive failures could manifest themselves in a broad range of failure symptoms. If there is a drive failure some of the possible symptoms could be: — Instrument does not recognize SSD and displays memory errors —...
Page 184 CPU and Disk Drives Disk Drive Troubleshooting This will format the entire disk drive, both the partition used for the firmware application software and the user stored data files. Because of this, once the formatting is complete the instrument firmware will need to be reloaded, and all user files will be lost.
Page 185: 10 Rf Assembly
Keysight Technologies X-Series Signal Generators Service Guide 10 RF Assembly What You Will Find in This Chapter This chapter provides information on the following: A3 RF Assembly Overview on page 186 A3 RF Assembly Troubleshooting on page 199...
Page 186: A3 Rf Assembly Overview
RF Assembly A3 RF Assembly Overview A3 RF Assembly Overview Refer to Chapter 13, “Block Diagrams,” for a visual description of the major blocks of circuitry contained in the A3 RF assembly. The part number and serial number of the A3 RF assembly installed in an instrument can be seen on the Utility, Instrument Info, Installed Board Info screen, as shown in Figure...
Page 187: Self Tests
RF Assembly A3 RF Assembly Overview The CXG and EXG A3 RF assemblies are basically the same thing. However, they are programmed differently. The difference between the A3 RF assemblies in the CXG, EXG, and MXG RF instruments is in the Reference and Synthesizer sections. The difference between the A3 RF assemblies in the EXG and MXG Microwave instruments is in the Synthesizer section.
Page 188: Synthesizer Section
RF Assembly A3 RF Assembly Overview Additionally, the Reference section in the MXG instruments provides the following reference signals: — 500 MHz to synthesizer offset phase lock loop — 1 GHz to synthesizer mixer LO The internal reference oscillator for all the MXG instruments, as well as the EXG microwave instruments, is an OCXO, while the internal reference oscillator for the CXG and EXG RF instruments is a TCXO.
Page 189: Synthesizer Multiplier / Divider Section
RF Assembly A3 RF Assembly Overview The Synthesizer section can also be frequency modulated by the FM output of the Function Generator / Trigger Control section for the FM portion of option UNT, AM, FM, Phase Modulation. There are several adjustments related to the Synthesizer section found in the performance verification and adjustment software for these instruments, which will be covered later in this chapter.
Page 190: Rf Output Section
RF Assembly A3 RF Assembly Overview Table 10-1 Synthesizer Multiplier / Divider Ranges Input Frequency Multiplier / Divisor Output Frequency 750 MHz to 1.5 GHz 1.5 to 3 GHz 750 MHz to 1.5 GHz 3 to 6 GHz There is one adjustment that is related to the Synthesizer Multiplier / Divider section found in the performance verification and adjustment software for these instruments, which will be covered later in this chapter.
Page 191 RF Assembly A3 RF Assembly Overview There are four different output bands contained within the RF Output section to cover the instrument frequency range, as seen in Table 10-2. Table 10-2 A3 RF Output Frequency Bands RF Output Band RF Instruments Microwave Instruments High Band >3.0 GHz to 6.0 GHz...
Page 192 RF Assembly A3 RF Assembly Overview The Low Band signal can also be switched to provide the input to the Het Band block. Het Band The heterodyne band block provides output frequencies from 5 MHz to just below 250 MHz. It generates these frequencies by mixing Synthesizer Multiplier / Divider section output frequencies of 1.005 GHz to just below 1.25 GHz with the 1 GHz frequency reference from the Reference section.
Page 193 RF Assembly A3 RF Assembly Overview Table 10-3 Attenuator Switching Versus User Selection Attenuation Atten 1 Atten 2 Atten 3 Value 40 dB 10 dB 5 dB 20 dB 40 dB 10 dB 5 dB Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 194: Automatic Level Control Section
RF Assembly A3 RF Assembly Overview In addition to three switchable attenuator sections, Atten 1 contains an input selection switch as well as a bypass switch. It has the ability to switch in 5 dB to 55 dB of attenuation. Atten 2 contains only one switchable attenuator section, 20 dB.
Page 195: Function Generator / Trigger Control Section
RF Assembly A3 RF Assembly Overview Amplitude Modulation (Option UNT) The AM output of the Function Generator / Trigger Control section is used to provide the modulating signal for analog amplitude modulation. This modulating signal is amplified in the Automatic Level Control section and summed with the ALC reference and temperature compensation DAC outputs.
Page 196: Instrument Interface Section
RF Assembly A3 RF Assembly Overview If option 303 or option UNT is installed the LF Function Generator can route its available functions to the rear panel LF OUT port. Trigger Control The Trigger Control is used to route either one of the instrument internal trigger signals to the rear panel TRIG 1 or TRIG 2, or an external trigger to the internal trigger circuitry.
Page 197: Rear Panel Bnc Input / Output Section
RF Assembly A3 RF Assembly Overview Figure 10-2 Instrument Interface Locations – A3 RF Assembly Rear Panel BNC Input / Output Section There are nine different rear panel BNC inputs and outputs that are used for triggering the instrument, triggering an external device, providing a low frequency function generator, locking the references of multiple instruments, and other functions.
Page 198 RF Assembly A3 RF Assembly Overview Many of these connectors can be internally routed to output different internally generated signals. So, they may be configured by the user to provide different output signals. Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 199: A3 Rf Assembly Troubleshooting
RF Assembly A3 RF Assembly Troubleshooting A3 RF Assembly Troubleshooting A3 RF assembly faults could manifest themselves in a broad range of failure symptoms. While there are many circuits and multiple sections on the A3 RF assembly it is very limited in the amount of measurement points for troubleshooting.
Page 200: Synthesizer Section
RF Assembly A3 RF Assembly Troubleshooting 3. If the instrument has option 1ER, flexible reference input, verify that the FREQ, More, Reference Oscillator, Ref Oscillator Ext Freq setting is set to 10 MHz. 4. If the unlock persists, replace the A3 RF assembly. Self Tests There are a series of Self Tests related directly to the Reference section.
Page 201 RF Assembly A3 RF Assembly Troubleshooting 3. Run the “Synthesizer Related Adjustments” listed later in this section. 4. If the failure persists, replace the A3 RF assembly. Synthesizer unlocked If there are any synthesizer unlocked errors see the “508 Synthesizer Unlocked”...
Page 202: Synthesizer Multiplier / Divider Section
RF Assembly A3 RF Assembly Troubleshooting 5. Synthesizer Sum Kv Calibration This adjustment is used to determine tuning sensitivity of the sum phase lock loop. 6. Synthesizer FracN Kv Calibration This adjustment is only applicable for MXG instruments. This adjustment is used to determine tuning sensitivity of the FracN phase lock loop.
Page 203 RF Assembly A3 RF Assembly Troubleshooting Figure 10-3 Synthesizer Multiplier / Divider Section Output – Vector 4. Tune the instrument to a frequency that exhibits the power level issue. 5. Connect a spectrum analyzer to A3 J2004. 6. Configure the spectrum analyzer with the following settings: —...
Page 204 RF Assembly A3 RF Assembly Troubleshooting N5173B, N5183B The output of this section can be measured at J2004, which is used to route the signal to the A7 Micro-Deck assembly input for frequencies of 3.2 GHz and above. However, since the A7 Micro-Deck will multiply the frequency of the signal to achieve the desired output frequency, the output frequency of this section will not match the output frequency selected by the user.
Page 205 RF Assembly A3 RF Assembly Troubleshooting Figure 10-4 Synthesizer Multiplier / Divider Section Output - Microwave 4. Tune the instrument to a frequency that exhibits the power level issue. 5. Connect a spectrum analyzer to A3 J2004. 6. Calculate the Synthesizer Multiplier / Divider output frequency by dividing the frequency of the signal source output by the corresponding A7 Multiplier listed in Table...
Page 206: Rf Output Section
RF Assembly A3 RF Assembly Troubleshooting Self Tests There are four Self Tests related directly to the Synthesizer Multiplier / Divider section. They are numbers 317 through 320. See Chapter 4, “Self Test,” for a description of each of the tests. If there are Self Test failures, see Table 4-1 instructions on how to proceed with determining a resolution for the failure.
Page 207 RF Assembly A3 RF Assembly Troubleshooting Microwave Instruments (N5173B, N5183B) If the instrument is having a power level issue below 3.2 GHz it will need to be isolated to either the A3 RF assembly or the A7 Micro-Deck assembly. If there is a power level issue at 3.2 GHz and above, see the “N5173B, N5183B”...
Page 208 RF Assembly A3 RF Assembly Troubleshooting — Span = 10 MHz — Reference Level = +10 dBm 9. Since A3 J2002 is before the output attenuator on the A7 Micro-Deck assembly the output level at A3 J2002 should be equal to the ALC Level. To find the ALC Level press AMPTD, Atten/ALC Control, Atten Hold On and read the Set ALC Level listed on the fourth softkey.
Page 209: Automatic Level Control Section
RF Assembly A3 RF Assembly Troubleshooting Before replacing an A3 RF assembly for a RF Output section Self Test failure be sure run the “RF Output Related Adjustments” listed later in this section. Also, be sure to verify the power supply voltages by seeing the “Power Supply Status Quick-Check”...
Page 210 RF Assembly A3 RF Assembly Troubleshooting — Sweep Out Interface LF Function Generator This functionality is only available with either option UNT, AM, FM, Phase Modulation or 303, Multifunction Generator. However, it is also used to provide the modulation signal for option UNW, Narrow Pulse Modulation. The LF Function Generator provides the modulating signals for analog amplitude modulation, frequency modulation, phase modulation, and pulse modulation.
Page 211: Instrument Interface Section
RF Assembly A3 RF Assembly Troubleshooting Sweep Out Interface See the “SWEEP OUT” section of the Rear “Rear Panel BNC Input / Output Section” later in this chapter. Instrument Interface Section For problems with the instrument communication, see the “Communication Issues”...
Page 212 RF Assembly A3 RF Assembly Troubleshooting 6. Set the power level to 0 dBm by pressing AMPTD, 0 dBm. 7. Turn amplitude modulation on by pressing AM, AM On. 8. Set the AM Source to EXT 1 by pressing AM Source, EXT 1. 9.
Page 213 RF Assembly A3 RF Assembly Troubleshooting 18.If either of the EXT inputs is not working run the External Mod Inputs Calibration adjustment from the performance verification software. If this does not correct the problem, replace the A3 RF assembly. LF OUT This procedure is only applicable with option 303, Multifunction Generator or option UNT, AM, FM, Phase Modulation.
Page 214 RF Assembly A3 RF Assembly Troubleshooting Figure 10-7 LF OUT – Sinewave Signal 10.The waveform generated can be changed to either Sine, Triangle, Square, Pos Ramp, or Neg Ramp by pressing LF Out, Setup LF Out Source, LF Out Waveform and selecting the desired waveform. The Triangle waveform is shown in Figure 10-8.
Page 215 RF Assembly A3 RF Assembly Troubleshooting SWEEP OUT This procedure will verify that the SWEEP OUT output is functioning properly. It will require the use of an oscilloscope. 1. Return the instrument to a known state by pressing Preset. 2. Connect the source rear panel SWEEP OUT connector to channel 1 of an oscilloscope.
Page 216 RF Assembly A3 RF Assembly Troubleshooting PULSE This procedure will verify that the PULSE input is functioning properly. While the use of this input may typically be thought of as a trigger for pulse modulation, it can also be used without the pulse modulation option. Because of this there are two procedures below for testing the functionality of this input;...
Page 217 RF Assembly A3 RF Assembly Troubleshooting — Amplitude = 1 Vpp — Offset = 0.5 V 13.Connect the function generator output to the rear panel PULSE input connector. 14.Turn the sweep on by pressing SWEEP, Sweep, Freq On. 15.At this point the signal on the spectrum analyzer display should be sweeping across the frequency range every two seconds.
Page 218 RF Assembly A3 RF Assembly Troubleshooting — Amplitude = 1 Vpp — Offset = 0.5 V 10.Connect the function generator output to the rear panel PULSE input connector. 11.Turn pulse modulation on by pressing Pulse, Pulse On. 12.Set the spectrum analyzer to video trigger with a trigger level of -30 dBm. 13.At this point the signal on the spectrum analyzer display should be a pulsed signal with a pulse width of 200 µs and a period of 1 ms, as shown Figure...
Page 219 RF Assembly A3 RF Assembly Troubleshooting 2. Turn the output power on by pressing RF On/Off so that the LED below it comes on. 3. Connect the source RF output to the input of a spectrum analyzer. 4. Setup the spectrum analyzer with the following settings: —...
Page 220 RF Assembly A3 RF Assembly Troubleshooting 20.If the signal is not sweeping across the spectrum analyzer display replace the A3 RF assembly. Output This procedure will require the use of an oscilloscope. 1. Return the instrument to a known state by pressing Preset. 2.
Page 221 RF Assembly A3 RF Assembly Troubleshooting Figure 10-11 TRIG 1 and Trig 2 Sweep Out Signals 11.If either of the signals on the oscilloscope is not working, replace the A3 RF assembly. REF IN The standard external reference that can be used to lock the instrument to an external device or system is a 10 MHz sinewave signal with a power level of -3.5 to +20 dBm.
Page 222 RF Assembly A3 RF Assembly Troubleshooting Figure 10-12 External Reference Indicator 8. Reduce the power level of the additional source to -3 dBm and verify that the EXTREF indicator is still on and that there is no reference unlock error on the display.
Page 223 RF Assembly A3 RF Assembly Troubleshooting Power Level Test 8. Reduce the power level of the additional source to -3 dBm and verify that the EXTREF indicator is still on and that there is no reference unlock error on the display. 9.
Page 224 RF Assembly A3 RF Assembly Troubleshooting 4. Verify that the power level is +4 dBm or greater, accounting for any cable loss, and that the frequency is 10 MHz +/-1 Hz, as shown in Figure 10-13. 5. If the power level or frequency does not meet the requirements run the “Reference Related Adjustments”...
Page 225: 11 Micro-Deck Assembly
Keysight Technologies X-Series Signal Generators Service Guide 11 Micro-Deck Assembly What You Will Find in This Chapter This chapter provides information on the following: A7 Micro-Deck Assembly Overview on page 226 A8 BNC Bypass Board Overview on page 232 A7 Micro-Deck Assembly Troubleshooting on page 233...
Page 226: A7 Micro-Deck Assembly Overview
Micro-Deck Assembly A7 Micro-Deck Assembly Overview A7 Micro-Deck Assembly Overview Refer to Chapter 13, “Block Diagrams,” for a visual description of the major blocks of circuitry contained in the A7 Micro-Deck assembly. The information in this chapter is for the N5173B and N5183B instruments, which will be referred to as microwave instruments since they have the ability to operate above 6 GHz.
Page 227: Self Tests
Micro-Deck Assembly A7 Micro-Deck Assembly Overview Self Tests There is an extensive number of Self Tests for the A7 Micro-Deck assembly. All the 1100, 1200, 1300, and 1400 series Self Tests are for the A7 Micro-Deck assembly. See Chapter 4, “Self Test,” for more information on these tests.
Page 228: Frequency Range
Micro-Deck Assembly A7 Micro-Deck Assembly Overview Frequency Range There are four frequency range options available in the microwave instruments, as shown in Table Frequency Range Option Frequency Range 9 kHz to 13 GHz 9 kHz to 20 GHz 9 kHz to 31.8 GHz 9 kHz to 40 GHz To cover the different frequency range options there are two variations of the A7 Micro-Deck assembly.
Page 229: Automatic Level Control
Micro-Deck Assembly A7 Micro-Deck Assembly Overview Desired Output Frequency Multiplier Input Frequency 3.2 GHz to 5 GHz 3.2 GHz to 5 GHz 5 GHz to 10 GHz 2.5 GHz to 5 GHz 10 GHz to 20 GHz 2.5 GHz to 5 GHz For frequencies above 20 GHz the A7A4 40 GHz Doubler is used to double the 10 GHz to 20 GHz output of the A7A2 20 GHz Frequency Multiplier.
Page 230: Amplitude Modulation
Micro-Deck Assembly A7 Micro-Deck Assembly Overview In this frequency range the ALC detector used is on the A7 Micro-Deck and the modulators are on the A3 RF assembly. 3.2 GHz and Above In this frequency range the ALC detector and modulator used are both on the A7 Micro-Deck assembly.
Page 231 Micro-Deck Assembly A7 Micro-Deck Assembly Overview A7AT1 Section Atten Setting 5 dB 10 dB 20 dB 40 dB 40 dB 0 dB 5 dB 15 dB 25 dB 35 dB 45 dB 55 dB 65 dB 75 dB 85 dB 95 dB 105 dB 115 dB...
Page 232: A8 Bnc Bypass Board Overview
Micro-Deck Assembly A8 BNC Bypass Board Overview A8 BNC Bypass Board Overview The A8 BNC Bypass board isolation circuit is a filter that minimizes interference caused when external equipment is connected to the rear panel external ALC IN connector. The circuit isolates DC voltage and high frequency signal components that might be present between different grounding paths.
Page 233: A7 Micro-Deck Assembly Troubleshooting
Micro-Deck Assembly A7 Micro-Deck Assembly Troubleshooting A7 Micro-Deck Assembly Troubleshooting A7 Micro-Deck assembly faults could manifest themselves in a broad range of failure symptoms. While there are many assemblies on the A7 Micro-Deck assembly it can only be replaced as an assembly, so isolating the fault to one of the lower level assemblies will not be necessary.
Page 234: Amplitude Modulation
Micro-Deck Assembly A7 Micro-Deck Assembly Troubleshooting Amplitude Modulation If there are any amplitude modulation issues, see “Amplitude Modulation Issues (Option UNT)” Chapter 6, “Troubleshooting” Pulse Modulation If there are any pulse modulation issues, see “Pulse Modulation Issues (Option UNW)” Chapter 6, “Troubleshooting” Self Tests There is a series of Self Tests related directly to the A7 Micro-Deck assembly.
Page 235: Rear Panel Bnc Connectors
Micro-Deck Assembly A7 Micro-Deck Assembly Troubleshooting This adjustment measures the absolute power at the mid-point of the ALC vernier and generates a cross calibration file for the ALC calibration and attenuator calibration. This adjustment also calibrates the first two attenuator steps (bypass, 0 dB and 5 dB), covering the frequency range of 50 MHz to 40 GHz.
Page 236 Micro-Deck Assembly A7 Micro-Deck Assembly Troubleshooting — Span = 10 MHz — Reference level = +10 dBm 9. Turn the output power on by pressing RF On/Off so that the LED below it comes on. 10.The power level of the signal on the spectrum analyzer display should be approximately 0 dBm, minus any loss through the coupler, connectors, and cable.
Page 237 Micro-Deck Assembly A7 Micro-Deck Assembly Troubleshooting 23.Adjust the Ext Leveling Amptd Offset on the source until the power level displayed on the source equals the spectrum analyzer marker level, +/-1 dB. 24.Once the power level displayed on the source equals the spectrum analyzer marker level, set the power level on the source to 0 dBm by pressing AMPTD, 0 dBm.
Page 238 Micro-Deck Assembly A7 Micro-Deck Assembly Troubleshooting Figure 11-2 Z AXIS OUT Signal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 239: A8 Bnc Bypass Board Troubleshooting
Micro-Deck Assembly A8 BNC Bypass Board Troubleshooting A8 BNC Bypass Board Troubleshooting The intent of the A8 BNC Bypass board is to isolate ALC circuitry ground, chassis ground, and external equipment ground from each other. Diodes are used to shunt DC current and capacitors to remove interference components to ground.
Page 240 Micro-Deck Assembly A8 BNC Bypass Board Troubleshooting Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 241: 12 Baseband Generators
Keysight Technologies X-Series Signal Generators Service Guide 12 Baseband Generators What You Will Find in This Chapter This chapter provides information on the following: A2 Vector BBG Assembly Overview on page 242 A7 Real-Time BBG Assembly Overview on page 244 A7A1 Real-Time Aux.
Page 242: A2 Vector Bbg Assembly Overview
Baseband Generators A2 Vector BBG Assembly Overview A2 Vector BBG Assembly Overview Refer to Chapter 13, “Block Diagrams,” for a visual description of the major blocks of circuitry contained in the A2 Vector BBG assembly. The part number and serial number of the A2 Vector BBG assembly installed in an instrument can be seen as the BB entry on the Utility, Instrument Info, Installed Board Info screen, as shown in Figure...
Page 243: Digital Section
Baseband Generators A2 Vector BBG Assembly Overview Digital Section The digital section receives a 100 MHz clock signal from the A3 RF assembly at P500. This reference clock is multiplied and divided within the assembly to provide different clock frequencies for the different circuits on the assembly. There are several adjustments related to the digital section found in the performance verification and adjustment software for these instruments, which will be covered later in this chapter.
Page 244: A7 Real-Time Bbg Assembly Overview
Baseband Generators A7 Real-Time BBG Assembly Overview A7 Real-Time BBG Assembly Overview The A7 Real-Time BBG assembly is only included in instruments with Option 660. The A7 Real Time BBG assembly contains a general purpose real-time digital signal processor featuring a single I/Q channel. The presence of the A7 Real-Time BBG assembly installed in an instrument can be seen as the RT App entry on the Utility, Instrument Info, Installed Board Info screen, as shown in...
Page 245: A7A1 Real-Time Aux. Power Supply Overview
Baseband Generators A7A1 Real-Time Aux. Power Supply Overview A7A1 Real-Time Aux. Power Supply Overview The A7A1 Real-Time Aux. Power Supply provides the A7 Real-Time BBG assembly with the +12 volts DC power it requires to operate. The power supply operates off the instrument AC power line voltage it gets from the A1 Power Supply assembly auxiliary AC output.
Page 246: A2 Vector Bbg Assembly Troubleshooting
Baseband Generators A2 Vector BBG Assembly Troubleshooting A2 Vector BBG Assembly Troubleshooting A2 Vector BBG assembly faults could manifest themselves in a broad range of failure symptoms. This section will address the most common failure symptoms. To provide access to the internal circuitry required to perform the troubleshooting procedures in this section the instrument outer cover and inner top cover will first need to be removed.
Page 247: Waveform Memory Issues
Baseband Generators A2 Vector BBG Assembly Troubleshooting If the 100 MHz reference signal is missing the instrument will give many error messages when the instrument is powered on. These will be errors such as: -240,"Hardware error;BBG clock generator error: Internal VCO is unlocked" -240,"Hardware error;BBG clock generator error: Internal 800 MHz clock missing"...
Page 248: Rf Signal Path Level Issues
Baseband Generators A2 Vector BBG Assembly Troubleshooting RF Signal Path Level Issues The troubleshooting information in this section is assuming that there is no problem with the RF power level when not using digital modulation, the problem only exists when digital modulation is turned on. If this is not the case, resolve any power level issue with the digital modulation turned off before continuing with this procedure.
Page 249: Unleveled Conditions
Baseband Generators A2 Vector BBG Assembly Troubleshooting 4. Tune the instrument to a frequency that exhibits the power level issue when using digital modulation. 5. Connect a spectrum analyzer to A3 J2004. 6. Configure the spectrum analyzer with the following settings: —...
Page 250: I/Q Calibration Failures
Baseband Generators A2 Vector BBG Assembly Troubleshooting I/Q Calibration Failures Many times, user experienced I/Q calibration failures can be difficult to reproduce. It is best to know what calibration type the user was having failures with – DC, User, or Full. If DC or User was used, the settings that they were using will also need to be known.
Page 251: I And Q Input Issues
Baseband Generators A2 Vector BBG Assembly Troubleshooting I and Q Input Issues Since there is no performance verification test for the I and Q inputs this procedure will provide a method for verifying the functionality of these inputs when the user reports a failure with them. This procedure will require the use of a function generator and a spectrum analyzer.
Page 252 Baseband Generators A2 Vector BBG Assembly Troubleshooting 13.Again, the signal on the spectrum analyzer should now resemble that shown in Figure 12-4 and the UNLEVEL indicator should be off. Figure 12-4 I and Q Inputs Modulated 14.If either input does not appear to be working, verify that the cables connecting the inputs to the A2 Vector BBG assembly are properly connected and not damaged, as shown in Figure...
Page 253: Rear Panel Bnc Connectors
Baseband Generators A2 Vector BBG Assembly Troubleshooting Figure 12-5 I and Q Input Connections – Front Panel Rear Panel BNC Connectors There are multiple rear panel BNC connectors on the A2 Vector BBG assembly. For these to be functional one of the baseband generator options must be installed in the instrument (653, 655, 656, 657).
Page 254 Baseband Generators A2 Vector BBG Assembly Troubleshooting 4. On the source press Mode, Dual ARB, Select Waveform. 5. Highlight SINE_TEST_WFM and press Select Waveform. 6. Turn the Arb on by pressing Arb On. 7. The I and Q output signals on the oscilloscope should resemble that seen Figure 12-6.
Page 255 Baseband Generators A2 Vector BBG Assembly Troubleshooting — I Bar OUT to Channel 3 — Q Bar OUT to Channel 4 3. Setup the oscilloscope with the following settings: — All Channels volts per division = 100 mV — Horizontal scale per division = 500 ns 4.
Page 256 Baseband Generators A2 Vector BBG Assembly Troubleshooting Figure 12-8 Q OUT versus Q Bar OUT 11.If any of the signals do not look like that shown, replace the A2 Vector BBG assembly. BB TRIG 1, BB TRIG 2, EVENT 1, PAT TRIG All four of these connectors can be used as either an input or an output, so the functionality of both will need to be verified.
Page 257 Baseband Generators A2 Vector BBG Assembly Troubleshooting 4. Setup the function generator with the following settings: — Function = Square wave — Frequency = 1 Hz — Amplitude = 1 VP-P — Offset = +0.5 V 5. Tune the instrument to 1 GHz by pressing FREQ, 1 GHz. 6.
Page 258 Baseband Generators A2 Vector BBG Assembly Troubleshooting Figure 12-9 BNC Inputs Gated Waveform 17.Select the EVENT 1 input by pressing Patt Trig 1 BNC Source, Event 1. 18.Connect the function generator output to the EVENT 1 connector. 19.The signal on the spectrum analyzer should now be alternating between the CW signal and the playing of the waveform file shown in Figure 12-9 a rate equal to the frequency of the function generator.
Page 259 Baseband Generators A2 Vector BBG Assembly Troubleshooting Outputs The following procedure will play a waveform file, route a marker output to all four of the BNC connectors, and display the signal from each output on an oscilloscope. This will verify that each is functioning as an output. This procedure will require the use of an oscilloscope.
Page 260: Self Tests
Baseband Generators A2 Vector BBG Assembly Troubleshooting Figure 12-10 BNC Outputs Marker 1 13.If any of the outputs do not look like that shown, replace the A2 Vector BBG assembly. Self Tests There are a series of Self Tests related directly to the A2 Vector BBG assembly. They are the 700, 800, and 900 series tests.
Page 261: I/Q Related Adjustments
Baseband Generators A2 Vector BBG Assembly Troubleshooting I/Q Related Adjustments There are eight I/Q related adjustments in the performance verification and adjustment software. They are: 1. IQ Abus Calibration Corrects the imperfections in the internal ABUS on the A2 Vector BBG assembly.
Page 262: A7 Real-Time Bbg Assembly Troubleshooting
Baseband Generators A7 Real-Time BBG Assembly Troubleshooting A7 Real-Time BBG Assembly Troubleshooting Troubleshooting of the A7 Real-Time BBG assembly is going to be very limited due to the nature of the assembly. This will be limited to the following, and should normally be performed in this order: 1.
Page 263: Power Supply Verification
Baseband Generators A7 Real-Time BBG Assembly Troubleshooting Figure 12-11 A7 Real-Time BBG Assembly Partial Identification If this is seen the assembly will not function properly or pass the associated Self Tests. Determine which of the possible reasons listed above are causing the assembly to not identify properly before continuing.
Page 264: Self Test
Baseband Generators A7 Real-Time BBG Assembly Troubleshooting — If all the power supply LEDs, as well as DS17, are on, proceed to the next troubleshooting procedure. — If DS17 is off, replace the A7 Real-Time BBG assembly. Figure 12-12 A7 Real-Time BBG Assembly Power Supply LED Locations Self Test There are a series of Self Tests for the A7 Real-Time BBG assembly.
Page 265: A7A1 Real-Time Aux. Power Supply Troubleshooting
Baseband Generators A7A1 Real-Time Aux. Power Supply Troubleshooting A7A1 Real-Time Aux. Power Supply Troubleshooting The AC power source from the A1 Power Supply assembly that powers the A7A1 Real-Time Aux. Power Supply is on whenever there is AC power supplied to the instrument, whether it is turned on or not.
Page 266 Baseband Generators A7A1 Real-Time Aux. Power Supply Troubleshooting Figure 12-13 A7A1 Real-Time Aux. Power Supply LED and Cables Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 267: 13 Block Diagrams
Keysight Technologies X-Series Signal Generators Service Guide 13 Block Diagrams What You Will Find in This Chapter This chapter contains block diagrams of the major assemblies in the instrument as well as the interconnections between them and expected power levels.
Page 268: Overview
Block Diagrams Overview Overview The objective of the block diagrams is to provide a functional overview of the signal generator hardware. Becoming familiar with this information before starting to service the product will be of great benefit. For a detailed description of the main functionality of the assemblies covered in the block diagrams see the information found in the associated chapter for each.
Page 269: Block Diagram Symbols
Block Diagrams Block Diagram Symbols Block Diagram Symbols Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 270: Mxg A3 Rf Assembly (503 / 506)
MXG A3 RF Assembly 100 MHz 0 dBm +/-3 dB N5181B, N5182B – Option 503 & 506 A3 RF Assembly W6 To A2 P500 J5000 100 MHz Synthesizer Reference 10 MHz 10 MHz FracN Loop Sum Loop OCXO 62.5 – 125 MHz Signal ÷16 Conditioning...
Page 271: Cxg/Exg A3 Rf Assembly (501 / 503 / 506)
CXG / EXG A3 RF Assembly 100 MHz 0 dBm +/-3 dB N5166B, N5171B, N5172B – Option 501, 503, & 506 A3 RF Assembly W6 To A2 P500 J5000 100 MHz Reference 10 MHz TCXO Synthesizer 100 MHz 1 – 50 MHz VCXO Flexible REF IN...
Page 272: Mxg A3 Rf Assembly (513 / 520 / 532 / 540)
MXG A3 RF Assembly 100 MHz 0 dBm +/-3 dB N5183B – Option 513, 520, 532, & 540 A3 RF Assembly J5000 100 MHz Synthesizer Reference 10 MHz 10 MHz FracN Loop Sum Loop OCXO 62.5 – 125 MHz Signal ÷16 Conditioning 50 MHz...
Page 273: Exg A3 Rf Assembly (513 / 520 / 532 / 540)
EXG A3 RF Assembly 100 MHz 0 dBm +/-3 dB N5173B – Option 513, 520, 532, & 540 A3 RF Assembly J5000 100 MHz Reference 10 MHz 10 MHz OCXO Signal Conditioning 50 MHz x2, x5 ÷2 Synthesizer Multiplier Chain 1 –...
Page 274: Mxg / Exg A7 Microdeck Assembly (513 / 520)
EXG / MXG A7 Micro-Deck Assembly A7 Micro-Deck Assembly N5173B, N5183B – Option 513 & 520 A7A2 20 GHz Frequency Multiplier 4 – 5 GHz 8 – 10 GHz A7A3 Mod-Filter 2.5 – 5 GHz 2.5 – 5.0 GHz 8.0 – 10 GHz 10 –...
Page 275: Mxg / Exg A7 Microdeck Assembly (532 / 540)
EXG / MXG A7 Micro-Deck Assembly A7 Micro-Deck Assembly N5173B, N5183B – Option 532 & 540 A7A2 20 GHz Frequency Multiplier 4 – 5 GHz 8 – 10 GHz A7A3 Mod-Filter 2.5 – 5 GHz 2.5 – 5.0 GHz 8.0 – 10 GHz 10 –...
Page 276: A2 Vector Bbg Assembly (N5166B / N5172B / N5182B)
A2 Vector BBG Assembly N5166B, N5172B, N5182B A2 Baseband Generator Assembly IQ Modulator RF Section 250 MHz – 6 GHz 250 MHz – 6 GHz -20 to +5 dBm RF Output +0 dBm +/-6 dB RF Input 4.5 GHz LPF From A3 J2004 Balun To A3 J2003...
Page 277: 14 Replacement Parts
What You Will Find in This Chapter This chapter provides information on the following: How to Order Parts on page 278 Shipping a Defective Assembly Back to Keysight Technologies on page Assemblies, Cables, and Hardware on page 280 Hardware on page 295...
Page 278: How To Order Parts
If you do not have web access, or the parts you are interested in cannot be found in the parts list provided, contact your local Keysight Technologies sales and service office with the following information: — Product model number —...
Page 279: Shipping A Defective Assembly Back To Keysight Technologies
United States.) If you are outside the United States, do not use the return address label; instead, address the box to the nearest Keysight Technologies sales and service office. Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 280: Assemblies, Cables, And Hardware
Replacement Parts Assemblies, Cables, and Hardware Assemblies, Cables, and Hardware In early 2016 Keysight introduced a new instrument design platform that uses the Keysight color palette of darker colors for the external parts. Parts in this chapter that are referred to as "Dark color" are for this new color palette, while the "Light color"...
Page 281 Replacement Parts Assemblies, Cables, and Hardware Table 14-1 Assemblies, Chassis, and Cables Description Part Number N5182B Light color N5180-60442 Dark color N5180-60471 N5183B Light color N5180-60263 Dark color N5180-60467 A6A1, PCA, Front Panel Interface N5180-60428 A6A2, USB Interface Assembly N5180-60411 PCA, USB Interface W2, Ribbon Cable, USB Interface A6A3, Power Switch Assembly...
Page 282 Replacement Parts Assemblies, Cables, and Hardware Table 14-1 Assemblies, Chassis, and Cables Description Part Number A6MP7, Display Side Support W1312-20216 A6MP8, RFI Gasket, Front Frame 8160-0660 A7 Real Time BBG Assembly N5180-60429 N5172B, N5182B, Option 660 only A7A1 Real Time Aux Power Supply N5180-60430 N5172B, N5182B, Option 660 A7A1MP1 Real Time BBG Aux Power Supply Cover...
Page 283 Replacement Parts Assemblies, Cables, and Hardware Table 14-1 Assemblies, Chassis, and Cables Description Part Number Front Panel RF Output Connector Spacer Type-N Output Connector N5180-20056 3.5 mm Output Connector E8251-20068 2.4 mm Output Connector None J1 Rear Panel RF Output Connector Type-N Female 1250-3968 3.5 mm Female...
Page 284 Replacement Parts Assemblies, Cables, and Hardware Table 14-1 Assemblies, Chassis, and Cables Description Part Number Cable Clamp, Fan Power Cables to Main Chassis 1400-3140 Cable Clamp, W10 Wire Harness to Main Chassis (Option 660) 1400-3357 Cable Clamp, W6 Semi-Rigid Cable to A2 Vector BBG Assy (N5166B, N5172B, 1400-3461 N5182B) 1400-1265...
Page 285 Replacement Parts Assemblies, Cables, and Hardware Table 14-1 Assemblies, Chassis, and Cables Description Part Number W7, Semi-Rigid Cable, A3 RF Assy J2004 to A2 Vector BBG Assy P1 N5180-20187 W8, Semi-Rigid Cable, A2 Vector BBG Assy P2 to A3 RF Assy J2003 N5180-20188 W9, Semi Rigid Cable, A3 RF Assy J4000 to RF Output N5166B, N5171B, N5172B, N5181B, N5182B...
Page 286 Replacement Parts Assemblies, Cables, and Hardware Table 14-1 Assemblies, Chassis, and Cables Description Part Number W26, Semi-Rigid Cable, A7A3 Mod-Filter J4 to A7A4 40 GHz Multiplier J1 N5180-20210 (532/540) W27, Semi-Rigid Cable, A7A4 40 GHz Doubler J2 to A7A5 Coupler Input (532/540) N5180-20044 W27, Semi-Rigid Cable, A7A4 40 GHz Doubler J2 to A7A5 Coupler Input (532/540) N5180-20047...
Page 287 Replacement Parts Assemblies, Cables, and Hardware Table 14-2 CXG A3 RF Assemblies Frequency Option Description New Assembly Exchange Assembly Part Number Part Number N5166B All Options - Front Panel Output N5180-60473 N5180-69473 Table 14-3 EXG A3 RF Assemblies Frequency Option Description New Assembly Exchange Assembly...
Page 288 Replacement Parts Assemblies, Cables, and Hardware Table 14-4 MXG A3 RF Assemblies Frequency Option Description New Assembly Exchange Assembly Part Number Part Number N5181B Option UNM - Front Panel Output N5180-60456 N5180-69456 Option UNM - Front Panel Output N5180-60457 N5180-69457 Option 1EM - Rear Panel Output N5180-60425 N5180-69425...
Page 289 Replacement Parts Assemblies, Cables, and Hardware Table 14-5 Accessories Description Part Number Front Panel Impact Cover Light color N5180-40016 Dark color N5180-40019 Rack Mount Flange Kit Light color 1CM010A Dark color 1CM110A Handle Kit Light color 1CN006A Dark color 1CN106A Rack Mount Kit with Handles Light color 1CP004A...
Page 290 Table 14-6 Attaching Hardware Attach Qty Part Type Size Tool Torque Number A1 Power Supply Assembly Main Chassis 0515-1715 Pan Head M3 x 0.5 T-10 9 in-lbs (40 mm) A2 Vector BBG Assembly Main Chassis 0515-0374 Pan Head M3 x 0.5 T-10 9 in-lbs (10 mm)
Page 291 Table 14-6 Attaching Hardware Attach Qty Part Type Size Tool Torque Number A6A3, Power Switch Assembly A6 Front Panel Assembly 0515-1227 Flat Head M3 x 0.5 T-10 9 in-lbs (6 mm) A6A4 PCA, Keypad A6 Front Panel Assembly 0515-0430 Pan Head M3 x 0.5 T-10 9 in-lbs...
Page 292 Table 14-6 Attaching Hardware Attach Qty Part Type Size Tool Torque Number A7A3 Mod-Filter Assembly A7 Micro-Deck Assembly 0515-1410 Pan Head M3 x 0.5 T-10 9 in-lbs (20 mm) A7A4 40 GHz Doubler Attenuator Bracket 0515-0372 Pan Head M3 x 0.5 T-10 9 in-lbs (8 mm)
Page 293 Table 14-6 Attaching Hardware Attach Qty Part Type Size Tool Torque Number Rear Panel GPIB Connector A3 RF Assembly 0380-4993 Standoff M3 x 0.5 7 mm 9 in-lbs (17.5 mm) 2190-0586 Lock Washer Rear Panel A3 RF Assembly 0515-1227 Flat Head M3 x 0.5 T-10 9 in-lbs...
Page 294 Table 14-6 Attaching Hardware Attach Qty Part Type Size Tool Torque Number Rear Panel Ground 0515-0372 Pan Head M3 x 0.5 T-10 9 in-lbs (8 mm) Rear Panel A7 Micro-Deck Assembly 0515-1227 Flat Head M3 x 0.5 T-10 9 in-lbs (6 mm) 0515-0372 Pan Head...
Page 295: Hardware
Replacement Parts Hardware Hardware This section shows the hardware and other instrument parts in your signal generator. — Front Panel View page 296 — Rear Panel View page 297 — Rear Panel Cable Connectors - Option 012 page 299 — Main Chassis with Inside Covers page 300 —...
Page 296: Front Panel
Replacement Parts Hardware Front Panel Figure 14-1 Front Panel View Item Description Part Number A6MP3, Overlay, Front Panel left light color N5180-80033 dark color N5180-80071 Nameplate A6MP5, RPG Knob light color W1312-40017 dark color W1312-40179 A6MP1, Main Keypad light color N5180-40011 dark color N5180-40018...
Page 297: Rear Panel
Replacement Parts Hardware Rear Panel Figure 14-2 Rear Panel View Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 298 Replacement Parts Hardware Figure 14-3 Rear Panel View - N5173B/83B Item Description Part Number Rear Panel Table 14-1 Screw, machine M3.0 x 8 0515-0372 Screw-Machine Pan-HD Torx-T8 M2.5 x 0.45 6mm-LG 0515-0366 (N5166B/N5172B/N5182B only) Lock washer 2190-0068 Hex nut 2950-0054 Rear Panel Hole Plug 6960-0517 LO IN Rear Panel Connector assembly (Option 012)
Page 299 Replacement Parts Hardware Figure 14-4 Rear Panel Cable Connectors - Option 012 Item Description Part Number LO IN Rear Panel Connector assembly 1250-1666 W16 LO OUT to LO IN Semi-Rigid Jumper Cable N5180-20178 LO OUT Rear Panel Connector assembly 1250-1666 DAC CLK IN Rear Panel Connector assembly 1250-1666 Flat Washer...
Page 300: Main Chassis With Inside Covers
Replacement Parts Hardware Main Chassis with Inside Covers Figure 14-5 Main Chassis with Inside Covers Item Description Part Number Main Chassis Inside Top Cover W1312-00126 Main Chassis Inside Bottom Cover W1312-00127 Screw - machine M3.0 x 08 FL-TX 0515-1227 Screw - machine M3.0 x 08 PN-TX 0515-0372 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 301 Replacement Parts Hardware Figure 14-6 Chassis Corner Nuts Item Description Part Number Chassis Corner Nut W1312-20038 SST PoP-Rivet 0361-1894 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 302: Outer Instrument Cover And Associated Parts
Replacement Parts Hardware Outer Instrument Cover and Associated Parts Figure 14-7 External Parts Item Description Part Number Front Panel Impact Cover light color N5180-40016 dark color N5180-40019 Hole Plug, Instrument Cover Side light color W1312-40024 dark color N9020-40014 Screw, Flat Head, M5 x 0.8, Torx T-20 0515-0708 Instrument Outer Cover light color...
Page 303 Replacement Parts Hardware Item Description Part Number Bottom Feet light color 5041-9167 dark color 5041-7906 Tilt Stand 1460-1345 Strap Handle assembly light color W1312-60097 dark color N5180-60287 not shown Hole Plug, Bottom Feet light color W1312-40032 dark color N9020-40007 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 304: Assemblies And Cables
Replacement Parts Assemblies and Cables Assemblies and Cables This section shows the assemblies and cables in your signal generator. — Front Panel Assemblies page 305 — A6A2 USB Interface Assembly Parts page 307 — A6A3 Power Switch Assembly Parts page 307 —...
Page 305: Front Panel Assemblies
Replacement Parts Assemblies and Cables Figure 14-8 Front Panel Assemblies Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 306 Replacement Parts Assemblies and Cables Item Description Part Number A6A2, USB Interface Assembly N5180-60411 (includes W2) W2, Ribbon Cable, A6A1 Front Panel Interface J15 to A6A2 USB Board N5180-60186 W38, Cable Harness, A6A1 Front Panel Interface J6 to A6A3 Power 8121-1383 Switch J1 A6A3, Power Switch Assembly PCA, Power Switch Keypad, Power...
Page 307: A6A2 Usb Interface Assembly Parts
Replacement Parts Assemblies and Cables Figure 14-9 A6A2 USB Interface Assembly Parts Item Description Part Number A6A2 USB Interface Assembly N5180-60411 USB Board W2, Ribbon Cable, A6A1 Front Panel N5180-60186 Interface J15 to A6A2 USB Board J3 Figure 14-10 A6A3 Power Switch Assembly Parts Item Description Part Number...
Page 308: A6A5 Display Lcd Assembly Parts
Replacement Parts Assemblies and Cables Figure 14-11 A6A5 Display LCD Assembly Parts Item Description Part Number A6A5 Display LCD Assembly N5180-60412 LCD Display W37, Ribbon Cable, A6A1 Front 8121-1902 Panel Interface J7 to LCD Input Compression Spring Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 309: A6Mp4, Display Mount And Filter Assembly
Replacement Parts Assemblies and Cables Figure 14-12 A6MP4, Display Mount and Filter Assembly Item Description Part Number A6AMP4 Display Mount and Filter Assembly N5180-60413 Filter - LCD Glass Display Boot Display Hold-Down Boot Compression Spring Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 310: Front Panel Rf Connector/Spacer/Bracket W/ W9 Semi-Rigid Cable Assembly Parts
Replacement Parts Assemblies and Cables Figure 14-13 Front Panel RF Connector/Spacer/Bracket w/ W9 Semi-Rigid Cable Assembly Parts Item Description Part Number J1 Front Panel RF Output Connector Type-N Female 1250-3968 3.5 mm Female 08673-60040 2.4 mm Female 5063-1700 Spacer Type-N Output Connector N5180-20056 3.5 mm Output Connector E8251-20068...
Page 311: Assemblies Top View - N5166B, N5171B/72B/81B/82B
Replacement Parts Assemblies and Cables Figure 14-14 Assemblies Top View - N5166B, N5171B/72B/81B/82B Description Part Number Front Panel Table 14-1 A1 Power Supply Assembly N5180-60414 A2 Vector BBG Assembly N5166B, N5172B, N5182B N5180-60415 A7 Real Time BBG Assembly N5172B, N5182B, Option 660 only N5180-60429 A7A1 Real Time Aux Power Supply N5172B, N5182B, Option 660 N5180-60430...
Page 312 Replacement Parts Assemblies and Cables Description Part Number Cable Clamp, W6 Semi-Rigid Cable to A2 Vector BBG Assy (N5166B, N5172B, 1400-3461 N5182B) W1, Ribbon Cable, A3 RF Assy P5 to A6A1 Front Panel Interface J10 N5180-60183 W4, Coaxial Cable, A6 Front Panel I Input to A2 Vector BBG Assy J15 N5180-60435 W5, Coaxial Cable, A6 Front Panel Q Input to A2 Vector BBG Assy J16 N5180-60435...
Page 313: Assemblies Top View - N5173B/83B (Options 513/520)
Replacement Parts Assemblies and Cables Figure 14-15 Assemblies Top View - N5173B/83B (Options 513/520) Description Part Number Front Panel Table 14-1 A1 Power Supply Assembly N5180-60414 A7 Micro-Deck Assembly (N5173B, N5183B) Table 14-1 A8 BNC Bypass Board N5173B, N5183B E8251-63665 B1 thru B4 Fan Assembly (each) N5180-60433 W1, Ribbon Cable, A3 RF Assy P5 to A6A1 Front Panel Interface J10...
Page 314 Replacement Parts Assemblies and Cables Description Part Number W21, Semi-Rigid Cable, A3 RF Assy J2004 to A7A2 20 GHz N5180-20208 Multiplier J1 W22, Coaxial Cable, A3 RF Assy J7 to A7A1 ALC Control J11 8121-1468 W23, Coaxial Cable, A7A1 ALC Control J18 to A3 RF Assy J6000 8121-1578 W24, Semi-Rigid Cable, A7A2 20 GHz Multiplier J2 to A7A3 N5180-20209...
Page 315: Assemblies Top View - N5173B/83B (Options 513/520, 1Em)
Replacement Parts Assemblies and Cables Figure 14-16 Assemblies Top View - N5173B/83B (Options 513/520, 1EM) Description Part Number Front Panel Table 14-1 A1 Power Supply Assembly N5180-60414 A7 Micro-Deck Assembly (N5173B, N5183B) Table 14-1 A8 BNC Bypass Board N5173B, N5183B E8251-63665 B1 thru B4 Fan Assembly (each) N5180-60433...
Page 316 Replacement Parts Assemblies and Cables Description Part Number W23, Coaxial Cable, A7A1 ALC Control J18 to A3 RF Assy J6000 8121-1578 W24, Semi-Rigid Cable, A7A2 20 GHz Multiplier J2 to A7A3 N5180-20209 Mod-Filter J1 W25, Semi-Rigid Cable, A7A3 Mod-Filter J2 to A7A5 Coupler Input N5180-20285 (513/520) W28, Semi-Rigid Cable, A7A5 Coupler Output to A7AT1 Atten Input...
Page 317: Assemblies Top View - N5173B/83B (Options 532/540)
Replacement Parts Assemblies and Cables Figure 14-17 Assemblies Top View - N5173B/83B (Options 532/540) Description Part Number Front Panel Table 14-1 A1 Power Supply Assembly N5180-60414 A7 Micro-Deck Assembly (N5173B, N5183B) Table 14-1 A8 BNC Bypass Board N5173B, N5183B E8251-63665 B1 thru B4 Fan Assembly (each) N5180-60433 W1, Ribbon Cable, A3 RF Assy P5 to A6A1 Front Panel Interface J10...
Page 318 Replacement Parts Assemblies and Cables Description Part Number W21, Semi-Rigid Cable, A3 RF Assy J2004 to A7A2 20 GHz N5180-20208 Multiplier J1 W22, Coaxial Cable, A3 RF Assy J7 to A7A1 ALC Control J11 8121-1468 W23, Coaxial Cable, A7A1 ALC Control J18 to A3 RF Assy J6000 8121-1578 W24, Semi-Rigid Cable, A7A2 20 GHz Multiplier J2 to A7A3 N5180-20209...
Page 319: Assemblies Top View - N5173B/83B (Options 532/540, 1Em)
Replacement Parts Assemblies and Cables Figure 14-18 Assemblies Top View - N5173B/83B (Options 532/540, 1EM) Description Part Number Front Panel Table 14-1 A1 Power Supply Assembly N5180-60414 A7 Micro-Deck Assembly (N5173B, N5183B) Table 14-1 A8 BNC Bypass Board N5173B, N5183B E8251-63665 B1 thru B4 Fan Assembly (each) N5180-60433...
Page 320 Replacement Parts Assemblies and Cables Description Part Number W20, Semi-Rigid Cable, A3 RF Assy J2002 to A7A3 Mod-Filter J3 N5180-20219 W21, Semi-Rigid Cable, A3 RF Assy J2004 to A7A2 20 GHz N5180-20208 Multiplier J1 W22, Coaxial Cable, A3 RF Assy J7 to A7A1 ALC Control J11 8121-1468 W23, Coaxial Cable, A7A1 ALC Control J18 to A3 RF Assy J6000 8121-1578...
Page 321: Assemblies Bottom View - All Models (N5182B Shown)
Replacement Parts Assemblies and Cables Figure 14-19 Assemblies Bottom View - All Models (N5182B shown) Description Part Number A3 RF Assembly Table 14-3 A3BT1 Battery 3V 620 ma-HR Ll Manganese Dioxide 1420-0533 A4 Solid State Disk Drive Assembly N5166B, N5172B, N5182B N5180-60426 A5 CPU Assembly and Thermal Pad N5180-60427...
Page 322: A3 Rf Assembly, A4 Ssd, A5 Cpu
Replacement Parts Assemblies and Cables Figure 14-20 A3 RF Assembly, A4 SSD, A5 CPU Item Description Part Number A3 RF Assembly Table 14-3 A5 CPU Assembly and Thermal Pad N5180-60427 A5MP1 CPU Heatsink and Thermal Pad N5180-60443 Screw, machine, Pan Head, Torx T8, M2.5 x 0.45, 14 mm 0515-2141 Screw, machine, Flat Head, Torx T10, M3 x 0.5, 6 mm 0515-1227...
Page 323: Rear Panel I/Q Cables - N5172B/82B Option 1Em
Replacement Parts Assemblies and Cables Figure 14-21 Rear Panel I/Q Cables - N5172B/82B Option 1EM Description Part Number RF Connector Table 14-1 W17, Coaxial Cable, Rear Panel I Input to A2 Vector BBG Assy J15 N5180-60458 W18, Coaxial Cable, Rear Panel Q Input to A2 Vector BBG Assy J16 N5180-60458 Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 324: Rear Panel Rf Connector/Spacer W/ W19 Semi-Rigid Cable Assembly Parts N5171B/72B/81B/82B
Replacement Parts Assemblies and Cables Figure 14-22 Rear Panel RF Connector/Spacer w/ W19 Semi-Rigid Cable Assembly Parts N5171B/72B/81B/82B Figure 14-23 Location of W19 and 1EM Rear Panel RF Connector- N5171B/72B/81B/82B Item Description Part Number J1 Rear Panel RF Output Connector, Type-N Female 1250-3968 Spacer, Type-N Output Connector N5180-20056...
Page 325: Rear Panel Rf Connector/Spacer W/ W19 Semi-Rigid Cable Assembly Parts N5173B/83B
Replacement Parts Assemblies and Cables Figure 14-24 Rear Panel RF Connector/Spacer w/ W19 Semi-Rigid Cable Assembly Parts N5173B/83B Item Description Part Number J1 Rear Panel RF Output Connector Type-N Female 1250-3968 3.5 mm Female 08673-60040 2.4 mm Female 5063-1700 Spacer Type-N Output Connector N5180-20056 3.5 mm Output Connector...
Page 326: Rear Panel Cables - Option
Replacement Parts Assemblies and Cables Figure 14-25 Rear Panel Cables - Option 012 Description Part Number W13, Semi-Rigid Cable, A2 Vector BBG Assy P4 to Rear Panel DAC CLK IN N5180-20186 W14, Semi-Rigid Cable, A3 RF Assy J2004 to Rear Panel LO OUT N5180-20144 W15, Semi-Rigid Cable, Rear Panel LO IN to A2 Vector BBG Assy P1 N5180-20178...
Page 327: A2 Vector Bbg Assembly Parts - N5166B/N5172B/N5182B
Replacement Parts Assemblies and Cables Figure 14-26 A2 Vector BBG Assembly Parts - N5166B/N5172B/N5182B Item Description Part Number A2 Vector BBG Assembly N5180-60415 Screw, Pan Head, M3 x 0.5, T-10. 18 mm 0515-0666 A2A1 Vector BBG Waveform Memory (N5166B, 1819-0590 N5172B - 1 required, N5182B - 2 required) Cable Clamp, W6 Semi-Rigid Cable to A2 Vector 1400-3461...
Page 328: A7 Real Time Bbg Assembly
Replacement Parts Assemblies and Cables Figure 14-27 A7 Real Time BBG Assembly Item Description Part Number A7 Real Time BBG Assembly N5180-60429 A8 Real Time BBG Jumper Board N5180-60432 2 and 4 Screw-Machine W/Crest-Cup-Con-Washer Pan-HD Torx-T10 M3 x 0.5 8mm-LG 0515-0372 W12, Cable Harness, A7A1 Real Time BBG Aux.
Page 329: B1 Through B4 Fan Assembly Parts - N5180-60433
Replacement Parts Assemblies and Cables Figure 14-28 B1 Through B4 Fan Assembly Parts - N5180-60433 Item Description Part Number Fan Assembly Fan Rivet (4) Grommet Snap Support Fan Motor Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 330: A3A1 Rear Panel Sd Memory Card (Option 006)
Replacement Parts Assemblies and Cables Figure 14-29 A3A1 Rear Panel SD Memory Card (Option 006) Item Description Part Number IC-Flash 32 GB SD Card 1819-1250 (Option 006) Rear Panel SD Memory Card Cover N5180-00027 (Option 006) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 331: 15 Assembly Replacement
Keysight Technologies X-Series Signal Generators Service Guide 15 Assembly Replacement What You Will Find in This Chapter This chapter provides information on the following: Before Replacing an Assembly on page 332 After Replacing or Repairing an Assembly on page 333...
Page 332: Before Replacing An Assembly
Assembly Replacement Before Replacing an Assembly Before Replacing an Assembly Before replacing any instrument assembly, perform the related “Pre Repair Procedures” found in Chapter 16, “Pre and Post-Repair Procedures”. Doing so will ensure that all required instrument information and calibration data will be properly preserved once the assembly replacement is completed.
Page 333: After Replacing Or Repairing An Assembly
Assembly Replacement After Replacing or Repairing an Assembly After Replacing or Repairing an Assembly After you have permanently replaced an assembly, certain configuration steps will need to be performed. Additionally, certain performance tests may have to also be performed. Refer to Chapter 16, “Pre and Post-Repair Procedures”, on page 411, for the next steps and the list of performance tests required for each...
Page 334: Assemblies You Can Replace
Assembly Replacement Assemblies You Can Replace Assemblies You Can Replace — “Outer Cover” on page 336 — “Inner Top Cover” on page 338 — “Inner Bottom Cover” on page 340 — “Front-Panel” on page 342 — “A1 Power Supply” on page 345 —...
Page 335 Assembly Replacement Assemblies You Can Replace This page intentionally left blank. Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 336: Outer Cover
Assembly Replacement Outer Cover Outer Cover Tools Required — T-20 driver Removal Procedure Refer to Figure 15-1 for this procedure. 1. Disconnect the power cord. 2. Using the T-20 driver, loosen the two screws (1) and remove the strap handle (2). 3.
Page 337 Assembly Replacement Outer Cover Figure 15-1 Outer Cover Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 338: Inner Top Cover
Assembly Replacement Inner Top Cover Inner Top Cover Tools Required — T-10 driver Removal Procedure Refer to Figure 15-2 for this procedure. 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to “Outer Cover” on page 336.
Page 339 Assembly Replacement Inner Top Cover Figure 15-2 Inner Top Cover Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 340: Inner Bottom Cover
Assembly Replacement Inner Bottom Cover Inner Bottom Cover Tools Required — T-10 driver Removal Procedure Refer to Figure 15-3 for this procedure. 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to “Outer Cover” on page 336.
Page 341 Assembly Replacement Inner Bottom Cover Figure 15-3 Inner Bottom Cover Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 342: Front-Panel
Assembly Replacement Front-Panel Front-Panel Tools Required — T-20 driver — needle-nose pliers Removal Procedure Refer to Figure 15-4 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover” on page 336, “Inner Top Cover”...
Page 343 Assembly Replacement Front-Panel 2. Recommended torque for all four screws is 21 in–lbs. 3. Perform the post-repair procedures that pertain to this replacement procedure. See Chapter 16, “Pre and Post-Repair Procedures.” Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 344 Assembly Replacement Front-Panel Figure 15-4 Front-Panel Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 345: A1 Power Supply
Assembly Replacement A1 Power Supply A1 Power Supply Tools Required — T-10 driver Removal Procedure Refer to Figure 15-5 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover” on page 336, and “Inner Top Cover”...
Page 346 Assembly Replacement A1 Power Supply Figure 15-5 A1 Power Supply (N5182B shown) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 347: A2 Vector Bbg Assembly (N5166B, N5172B, And N5182B)
Assembly Replacement A2 Vector BBG Assembly (N5166B, N5172B, and N5182B) A2 Vector BBG Assembly (N5166B, N5172B, and N5182B) Tools Required — T-10 driver — 5/16” open-ended wrench — needle-nose pliers Removal Procedure Refer to Figure 15-6 for this procedure. 1. Before replacing the A2 Vector BBG assembly see Chapter 16, “Pre and Post-Repair Procedures”, and perform the...
Page 348: Replacement Procedure
Assembly Replacement A2 Vector BBG Assembly (N5166B, N5172B, and N5182B) 9. Refer to Figure 15-6. If Option 660 is installed, use the T-10 driver to remove the four screws (1) that secure the A8 Real Time Jumper Board to the A2 Vector BBG assembly and the A7 Real Time BBG assembly. Pull up on the Real Time Jumper Board to disengage from the assemblies.
Page 349 Assembly Replacement A2 Vector BBG Assembly (N5166B, N5172B, and N5182B) Figure 15-6 A2 Vector BBG Assembly (Option 660) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 350 Assembly Replacement A2 Vector BBG Assembly (N5166B, N5172B, and N5182B) Figure 15-7 Option 012 Cables Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 351: A3 Rf Assembly (N5171B, N5181B)
Assembly Replacement A3 RF Assembly (N5171B, N5181B) A3 RF Assembly (N5171B, N5181B) Do not disconnect the RF connector cable from the A3 RF assembly or the RF connector itself. Removing the cable will result in instrument failure. Tools Required — T-10 driver —...
Page 352: Replacement Procedure
Assembly Replacement A3 RF Assembly (N5171B, N5181B) 8. Refer to Figure 15-8. Using the T-10 driver, remove the 10 screws (1) that connect the A3 RF assembly to the chassis. 9. Refer to Figure 15-10. Place the tip of a medium common screwdriver into one of the three pry slots on the A3 RF assembly and twist the screwdriver to release the board from the connector pins.
Page 353 Assembly Replacement A3 RF Assembly (N5171B, N5181B) Figure 15-8 A3 RF Assembly - Screw locations Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 354 Assembly Replacement A3 RF Assembly (N5171B, N5181B) Figure 15-9 RF Connector - Screw locations (Type-N Shown) Figure 15-10 A3 RF Assembly - Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 355 Assembly Replacement A3 RF Assembly (N5171B, N5181B) Figure 15-11 A3 RF Assembly - Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 356: A3 Rf Assembly (N5166B, N5172B, And N5182B)
Assembly Replacement A3 RF Assembly (N5166B, N5172B, and N5182B) A3 RF Assembly (N5166B, N5172B, and N5182B) Do not disconnect the RF connector cable from the A3 RF assembly or the RF connector itself. Removing the cable will result in instrument failure. Tools Required —...
Page 357: Replacement Procedure
Assembly Replacement A3 RF Assembly (N5166B, N5172B, and N5182B) “Front-Panel” on page 342 10.For Option 1EM instruments, skip to step 10. For all other instruments, refer to Figure 15-9. Using the T-10 driver, remove the 3 screws (1) that connect the RF In connector to the chassis. The RF Connector can be easily damaged.
Page 358 Assembly Replacement A3 RF Assembly (N5166B, N5172B, and N5182B) Figure 15-12 Cable Removal for RF Assembly (std) - N5166B, N5172B, and N5182B Figure 15-13 Cable Removal for A3 RF Assembly, Option 012 - N5172B and N5182B Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 359 Assembly Replacement A3 RF Assembly (N5166B, N5172B, and N5182B) Figure 15-14 Loosen A2/A7 Boards screws Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 360: A3 Rf Assembly (N5173B, N5183B)
Assembly Replacement A3 RF Assembly (N5173B, N5183B) A3 RF Assembly (N5173B, N5183B) Tools Required — T-10 driver — 5/16” open-ended wrench — Flat-head screwdriver Removal Procedure Pry slots have been provided on both sides of the A3 RF assembly to aid in removing the board.
Page 361 Assembly Replacement A3 RF Assembly (N5173B, N5183B) Figure 15-15 A7 Micro-Deck to A3 RF Assembly Interconnections 9. Refer to Figure 15-8. Using the T-10 driver, remove the 10 screws (1) that connect the A3 RF assembly to the chassis. 10.Refer to Figure 15-10.
Page 362: Replacement Procedure
Assembly Replacement A3 RF Assembly (N5173B, N5183B) Replacement Procedure When plugging in the A3 RF assembly into the A7 board, it is important to have all boards loose in order to ensure proper connector mating. Follow these steps: 1. Referring to Figure 15-15, loosen the 10 screws (1) that attach the A7A1 Microwave ALC Control assembly to the A7 Micro-Deck.
Page 363: A3Bt1 Battery
Assembly Replacement A3BT1 Battery A3BT1 Battery This battery contains lithium. Do not incinerate or puncture this battery. Do not install this battery backwards. To dispose of the battery in a safe manner. Refer to “Lithium Battery Disposal” on page 35 The battery is part of the power off circuitry.
Page 364 Assembly Replacement A3BT1 Battery Figure 15-16 A3BT1 Battery Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 365: A4 Ssd (N5166B, N5172B, And N5182B Only)
Assembly Replacement A4 SSD (N5166B, N5172B, and N5182B only) A4 SSD (N5166B, N5172B, and N5182B only) Tools Required — T-10 driver Removal Procedure Refer to Figure 15-17 Figure 15-18 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover”...
Page 366 Assembly Replacement A4 SSD (N5166B, N5172B, and N5182B only) Figure 15-17 A4 SSD Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 367 Assembly Replacement A4 SSD (N5166B, N5172B, and N5182B only) Figure 15-18 A4 SSD and A5 CPU Removal (0960-2870) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 368 Assembly Replacement A4 SSD (N5166B, N5172B, and N5182B only) Figure 15-19 A4 SSD and A5 CPU Removal (0960-3295) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 369: A5 Cpu
Assembly Replacement A5 CPU A5 CPU Tools Required — T-8 driver Removal Procedure Refer to Figure 15-18 Figure 15-20 for this procedure. There is one long pin connector attaching the A5 CPU to the A3 RF assembly. It is located on the long end of the A5 CPU board, closest to the center of the instrument.
Page 370 Assembly Replacement A5 CPU Figure 15-20 A5 CPU Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 371: A6 Front Panel Interface Scan Assembly
Assembly Replacement A6 Front Panel Interface Scan Assembly A6 Front Panel Interface Scan Assembly Tools Required — T-10 driver Removal Procedure Refer to Figure 15-21 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover”...
Page 372 Assembly Replacement A6 Front Panel Interface Scan Assembly Figure 15-21 Front Panel Interface Scan Assembly Figure 15-22 LCD Cable Locking Tabs Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 373: Usb Board
Assembly Replacement USB Board USB Board Tools Required — T-10 driver Removal Procedure 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover” on page 336, “Inner Top Cover” on page 338, and “Inner Bottom Cover”...
Page 374 Assembly Replacement USB Board Figure 15-24 USB Board Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 375: Lcd Display
Assembly Replacement LCD Display LCD Display Tools Required — T-10 driver Removal Procedure 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover” on page 336, “Inner Top Cover” on page 338, and “Inner Bottom Cover”...
Page 376 Assembly Replacement LCD Display Figure 15-25 Sub Panel Figure 15-26 LCD Display Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 377: Key Pad
Assembly Replacement Key Pad Key Pad Tools Required — T-10 driver Removal Procedure Refer to Figure 15-27 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover” on page 336, “Inner Top Cover”...
Page 378 Assembly Replacement Key Pad Figure 15-27 Key Pad Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 379 Assembly Replacement Key Pad Figure 15-28 Key Pad Screws Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 380: Power Switch
Assembly Replacement Power Switch Power Switch Tools Required — T-10 driver Removal Procedure Refer to Figure 15-29 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover” on page 336, “Inner Top Cover”...
Page 381 Assembly Replacement Power Switch Figure 15-29 Power Switch Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 382: A7 Real Time Bbg Assembly (N5172B And N5182B Option 660)
Assembly Replacement A7 Real Time BBG Assembly (N5172B and N5182B Option 660) A7 Real Time BBG Assembly (N5172B and N5182B Option 660) Tools Required — T-10 driver — 5/16” open-ended wrench — needle-nose pliers Removal Procedure Refer to Figure 15-30 for this procedure.
Page 383 Assembly Replacement A7 Real Time BBG Assembly (N5172B and N5182B Option 660) 2. Recommended torque for all T-10 screws is 9 in–lbs. 3. Perform the post-repair procedures that pertain to this replacement procedure. See Chapter 16, “Pre and Post-Repair Procedures.” Figure 15-30 A7 Real Time BBG Assembly (N5172B, N5182B Option 660) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 384: A7A1 Real Time Aux Power Supply
Assembly Replacement A7A1 Real Time Aux Power Supply A7A1 Real Time Aux Power Supply Tools Required — T-10 driver — needle-nose pliers Removal Procedure Refer to Figure 15-31 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover”...
Page 385 Assembly Replacement A7A1 Real Time Aux Power Supply Figure 15-31 A7 Real Time Aux Power Supply Cable Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 386 Assembly Replacement A7A1 Real Time Aux Power Supply Figure 15-32 A7 Real Time Aux Power Supply Cover Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 387 Assembly Replacement A7A1 Real Time Aux Power Supply Figure 15-33 A7 Real Time Aux Power Supply Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 388: Rf Connector
Assembly Replacement RF Connector RF Connector Tools Required — T-10 driver — 5/16” open-ended wrench Removal Procedure Refer to Figure 15-34 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover from the signal generator. Refer to “Outer Cover”...
Page 389 Assembly Replacement RF Connector Figure 15-34 RF Connector Removal (Type-N Shown) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 390: Rf Connector (N5173B/83B Only - Standard)
Assembly Replacement RF Connector (N5173B/83B only - Standard) RF Connector (N5173B/83B only - Standard) Tools Required — 5/16” open-ended wrench Removal Procedure Refer to Figure 15-34 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover”...
Page 391 Assembly Replacement RF Connector (N5173B/83B only - Standard) Figure 15-35 RF Connector (2.4 mm Shown) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 392: A7 Micro-Deck (N5173B/83B Only - Standard)
Assembly Replacement A7 Micro-Deck (N5173B/83B only - Standard) A7 Micro-Deck (N5173B/83B only - Standard) Tools Required — T-10 driver — 5/16” open-ended wrench Removal Procedure Refer to Figure 15-36 for this procedure. 1. Before replacing the A7 Micro-Deck assembly see Chapter 16, “Pre and Post-Repair Procedures”...
Page 393 Assembly Replacement A7 Micro-Deck (N5173B/83B only - Standard) Figure 15-36 A7 Micro Deck (N5173B/83B only - Standard shown) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 394: Replacement Procedure
9. Torque all screws to 9 in–lbs. 10.Replace the eight screws to secure the cover of the shipping chassis. 11.Return the A7 Micro Deck to Keysight Technologies. Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 395 Assembly Replacement A7 Micro-Deck (N5173B/83B only - Standard) Figure 15-37 A7 Micro Deck Shipping Chassis Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 396: A7 Micro-Deck (N5173B/83B Only - Option 1Em)
Assembly Replacement A7 Micro-Deck (N5173B/83B only - Option 1EM) A7 Micro-Deck (N5173B/83B only - Option 1EM) Tools Required — T-10 driver — 5/16” open-ended wrench Removal Procedure The removal procedure for the Option 1EM A7 Micro Deck is identical to the removal procedure for “A7 Micro-Deck (N5173B/83B only - Standard)”...
Page 397: Replacement Procedure
Assembly Replacement A7 Micro-Deck (N5173B/83B only - Option 1EM) Replacement Procedure Refer to Figure 15-37 for this procedure. 1. Using the T-10 driver, remove the five screws (3) that secure the replacement A7 Micro Deck to its packaging. 2. Carefully slide the replacement A7 Micro Deck out of its packaging. 3.
Page 398: A8 Floating Bnc Bypass (N5173B/83B Only)
Assembly Replacement A8 Floating BNC Bypass (N5173B/83B only) A8 Floating BNC Bypass (N5173B/83B only) Tools Required — 5/8” hex-nut driver — needle-nose pliers Removal Procedure Refer to Figure 15-38 for this procedure. 1. Disconnect the power cord. 2. Remove the inner cover and outer top cover from the signal generator. Refer to “Outer Cover”...
Page 399 Assembly Replacement A8 Floating BNC Bypass (N5173B/83B only) Figure 15-38 A8 Floating BNC Bypass Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 400: B1 Through B4 Fans
Assembly Replacement B1 through B4 Fans B1 through B4 Fans Tools Required — T-10 driver — T-20 driver — needle-nose pliers Removal Procedure Refer to Figure 15-39 Figure 15-40 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover”...
Page 401 Assembly Replacement B1 through B4 Fans Figure 15-39 B1 thru B4 Fans (1 of 2) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 402 Assembly Replacement B1 through B4 Fans Figure 15-40 B1 thru B4 Fans (2 of 2) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 403: Rear Panel (N5171B/81B)
Assembly Replacement Rear Panel (N5171B/81B) Rear Panel (N5171B/81B) Tools Required — T-10 driver — 5/8” hex-nut driver (p/n: 8710-2546) Removal Procedure Refer to Figure 15-41 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover”...
Page 404 Assembly Replacement Rear Panel (N5171B/81B) Figure 15-41 N5171B/81B Rear Panel Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 405: Rear Panel (N5166B, N5172B, And N5182B)
Assembly Replacement Rear Panel (N5166B, N5172B, and N5182B) Rear Panel (N5166B, N5172B, and N5182B) Tools Required — T-8 driver — T-10 driver — 5/8” hex-nut driver (p/n: 8710-2546) — 5/16” open-ended wrench — 1/4” hex-nut driver Removal Procedure 1. Disconnect the power cord. 2.
Page 406 Assembly Replacement Rear Panel (N5166B, N5172B, and N5182B) 3. Recommended torque for all other screws is 9 in–lbs. 4. Recommended torque for all BNC connectors is 21 in–lbs. Figure 15-42 Flash Memory Card and Cover Removal Figure 15-43 N5172B/82B Option 012 Rear Panel Cables Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 407 Assembly Replacement Rear Panel (N5166B, N5172B, and N5182B) Figure 15-44 N5172B/82B Option 1EM Rear Panel I Q Connector Removal Figure 15-45 N5166B, N5172B, and N5182B Rear Panel Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 408: Rear Panel (N5173B/83B)
Assembly Replacement Rear Panel (N5173B/83B) Rear Panel (N5173B/83B) Tools Required — T-10 driver — 5/8” hex-nut driver (p/n: 8710-2546) Removal Procedure Refer to Figure 15-41 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer Cover”...
Page 409 Assembly Replacement Rear Panel (N5173B/83B) Figure 15-46 N5173B/83B Rear Panel Removal Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 410 Assembly Replacement Rear Panel (N5173B/83B) Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 411: 16 Pre And Post-Repair Procedures
Keysight Technologies X-Series Signal Generators Service Guide 16 Pre and Post-Repair Procedures What You Will Find in This Chapter This chapter provides information on the following: Pre Repair Procedures on page 412 Post Repair Procedures on page 414 Additional Tasks on page 419...
Page 412: Pre Repair Procedures
Pre and Post-Repair Procedures Pre Repair Procedures Pre Repair Procedures To ensure a successful assembly replacement there are steps that can be taken before an assembly is removed. These steps will help to ensure that vital instrument information will be properly transferred from the defective assemblies to the replacements.
Page 413 Pre and Post-Repair Procedures Pre Repair Procedures Once the backup has been performed the assembly being replaced can be removed. After installing the replacement assembly follow the post-repair procedures outlined in the “Post Repair Procedures” section of this chapter. Of course, if an instrument is inoperative the license information and calibration data cannot be backed up prior to replacing an assembly.
Page 414: Post Repair Procedures
Pre and Post-Repair Procedures Post Repair Procedures Post Repair Procedures When an assembly is replaced, ignore any error messages that appear until after the Utilities and Additional Tasks listed in Table 16-2 Table 16-3 have been completed. N5166B, N5171B/72B/81B/82B Most replacement assemblies are fully calibrated and do not require any adjustments.
Page 415 Pre and Post-Repair Procedures Post Repair Procedures Table 16-2 Post Repair Procedures for N5166B, N5171B, N5172B, N5181B, N5182B Post-Repair Procedures Utilities Calibration Array Restore Reset Mechanical Relays Additional Tasks Install Instrument Firmware Restore Licenses Restore Factory Waveforms Verify Factory I/Q Calibration Finalize RF Assembly Installation Finalize BBG Assembly Installation Backup Licenses...
Page 416 Pre and Post-Repair Procedures Post Repair Procedures a. For further information refer to Chapter 18, “Performance Verification and Adjustment Software.” b. See the “Additional Tasks” section in this chapter for detailed instructions on these tasks. c. For information on performing the instrument Self Tests refer to Chapter 4, “Self Test.”...
Page 417 Pre and Post-Repair Procedures Post Repair Procedures Table 16-3 Post Repair Procedures for N5173B, N5183B Post-Repair Procedures Utilities Calibration Array Restore Reset Mechanical Relays Additional Tasks Install Instrument Firmware Restore Licenses Backup Licenses Set Time and Date Set Hostname Front Panel Tests Self Test Adjustments RF ABUS Calibration...
Page 418 Pre and Post-Repair Procedures Post Repair Procedures Table 16-3 Post Repair Procedures for N5173B, N5183B Post-Repair Procedures Maximum Output Power Power Level Accuracy Harmonic Spurious Sub-Harmonic Spurious Non-Harmonic Spurious AM Depth Accuracy (Option UNT) AM Distortion (Option UNT) FM Distortion (Option UNT) FM Deviation Accuracy (Option UNT) AM Frequency Response (External) (Option UNT) Frequency Switching Speed (Option UNZ)
Page 419: Additional Tasks
Pre and Post-Repair Procedures Additional Tasks Additional Tasks This section contains information on additional post repair tasks that must be performed to return an instrument to normal functionality after certain assemblies have been replaced. See Table 16-2 Table 16-3 for a complete list of all process that need to be performed after an assembly replacement.
Page 420 Pre and Post-Repair Procedures Additional Tasks Figure 16-1 Factory I/Q Calibration Performed 4. If there is no Date, Range, and Method on the display that the Factory Calibration was performed, as shown in Figure 16-2, the Enhanced Factory Calibration will need to be run. Figure 16-2 Factory I/Q Calibration Not Performed 5.
Page 421: Finalize Rf Assembly Installation
Pre and Post-Repair Procedures Additional Tasks Finalize RF Assembly Installation This task is for N5166B, N5172B, and N5182B instruments and will require the use of additional test equipment. Perform this required task by following this procedure: 1. Press Utility, More, Service to enter the Service menu. 2.
Page 422 Pre and Post-Repair Procedures Additional Tasks When an A5 CPU assembly is replaced the following error messages will be displayed until the licenses are restored: 617 Configuration Error: The instrument has no frequency range option installed. Use the service procedure to recover instrument licenses from the backup.
Page 423: Backup Licenses
Pre and Post-Repair Procedures Additional Tasks Figure 16-4 Restore License Data From Backup 10.The instrument will copy the licenses from the backup location on the A3 RF assembly into the A5 CPU non-volatile memory and load the instrument firmware. 11.Once the instrument completes its boot up process all the previously licensed options should be enabled.
Page 424 Pre and Post-Repair Procedures Additional Tasks The following procedure will backup the instrument licenses from the A5 CPU assembly non-volatile memory to the backup memory location on the replacement A3 RF assembly: 1. Turn the instrument off by using the front panel power button. 2.
Page 425: Restore Factory Waveforms
Pre and Post-Repair Procedures Additional Tasks Restore Factory Waveforms This task is only for N5166B, N5172B, and N5182B instruments that do not have option SD0. As shipped from the factory there are as series of waveform files installed in the user memory portion of the A4 Solid State disk drive for many of the different digital modulation formats.
Page 426: Front Panel Tests
Pre and Post-Repair Procedures Additional Tasks Example: A-N5182B-12345 4. When completed press Enter. An external USB keyboard can be used to enter the hostname. Front Panel Tests The Front Panel Tests verify the functionality of multiple front panel operations, all of which should be verified after the instrument front panel has been repaired or replaced.
Page 427: 17 Functional Tests
Keysight Technologies X-Series Signal Generators Service Guide 17 Functional Tests What You Will Find in This Chapter This chapter provides information on the following: Functional Test Versus Performance Verification on page 428 Before Performing a Functional Test on page 429...
Page 428: Functional Test Versus Performance Verification
Functional Tests Functional Test Versus Performance Verification Functional Test Versus Performance Verification Functional tests use a minimum set of test equipment to check a much smaller range of parameters (and a limited number of data points for each parameter) than do performance verification tests. Functional tests use limits that are wider than the published specifications;...
Page 429: Before Performing A Functional Test
Functional Tests Before Performing a Functional Test Before Performing a Functional Test 1. Ensure that you have the proper test equipment. 2. Switch on the unit under test (UUT) and let it warm up (in accordance with warm-up requirements in the instrument specifications). 3.
Page 430: Relative Frequency Range And Accuracy Check
Functional Tests Relative Frequency Range and Accuracy Check Relative Frequency Range and Accuracy Check The frequency range is tested by determining the frequency accuracy relative to the timebase at the frequency limits of the signal generator. This test can be performed with a frequency counter that meets the frequency accuracy limits Table 17-1.
Page 431: Troubleshooting Problems With The Frequency Accuracy Check
Functional Tests Relative Frequency Range and Accuracy Check 10.Repeat step step 8 and step step 9 for all of the frequencies in the table that are within the frequency range of your signal generator. For frequencies <200 MHz, use Channel 3 on the frequency counter (press Freq Ratio until CH3: displays).
Page 432: Leveled Output Power
Functional Tests Leveled Output Power Leveled Output Power This test verifies that the CW output power from the signal generator is within defined limits. The following table lists the preferred equipment for this test. Test Equipment Recommended Model Power Meter Keysight E4418B or E4419A/B E-Series or equivalent Power Sensor, Keysight E9304A...
Page 433: N5171B/81B Alternative Test Procedure
Functional Tests Leveled Output Power 7. Turn modulation off: Press Mod On/Off so that the Mod On/Off LED turns off. 8. Set the frequency: Press Frequency and enter the first frequency value listed in Table 17-2. 9. Set the amplitude: Press Amplitude and enter the amplitude value for that frequency.
Page 434 Functional Tests Leveled Output Power b. Select a power meter channel (if applicable). c. Use the arrow keys to enter the frequency at which to measure the power. 9. Measure the output power level. 10.Repeat steps 6 through 9 to measure power at each of the frequencies listed in Table 17-2.
Page 435: N5166B, N5172B, And N5182B Test Procedure
Functional Tests Leveled Output Power N5166B, N5172B, and N5182B Test Procedure Test Setup 1. Connect the equipment as shown: 2. Zero and calibrate the power sensor. USB U2000A Series Power Sensors do not require the sensor to be zeroed or calibrated. 3.
Page 436 Functional Tests Leveled Output Power c. If using a power meter, configure the power meter as follows: 1. On the power meter, press the Frequency Cal Fac button. 2. If applicable, select a power meter channel. 3. Use the arrow keys to enter the frequency at which to measure the power.
Page 437 Functional Tests Leveled Output Power 15.Turn the arbitrary waveform player on: Press the ARB softkey to highlight 16.Set the frequency to the first value listed in Table 17-4: Press Frequency > 50 > MHz. 17.Set the amplitude to 7 dBm: Press Amplitude >...
Page 438: N5166B, N5172B, And N5182B Alternative Test Procedure
Functional Tests Leveled Output Power N5166B, N5172B, and N5182B Alternative Test Procedure If a USB power sensor is not available, use a power meter to measure the output power of the signal generator. Test Setup 1. Zero and calibrate the power sensor to the power meter: 2.
Page 439: Troubleshooting Problems With The Output Power Check
Functional Tests Leveled Output Power Troubleshooting Problems with the Output Power Check — Verify that you are using the appropriate power sensor. — Normally, power sensor calibration factors are automatically downloaded to the power meter when the power meter turns on. If this does not occur, manually enter the correct calibration factors for the power sensor you are using.
Page 440 Functional Tests Leveled Output Power Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 441: 18 Performance Verification And Adjustment Software
Keysight Technologies X-Series Signal Generators Service Guide 18 Performance Verification and Adjustment Software What You Will Find in This Chapter This chapter provides information on the following: Test Software Overview on page 442 Performance Verification Tests on page 442 Adjustments on page 442...
Page 442: Test Software Overview
Performance Verification and Adjustment Software Test Software Overview Test Software Overview The X-Series Signal Generators can be fully tested and adjusted with the use of the N7822A Calibration Application software. To download a copy of the Performance Verification & Adjustment software as well as find information on software licensing, visit the Keysight Calibration &...
Page 443: Utilities
Performance Verification and Adjustment Software Utilities Utilities Certain utilities are provided to properly complete the servicing of an instrument. The use of these is defined in Chapter 16, “Pre and Post-Repair Procedures” Required Test Equipment A complete list of test equipment required to perform both the performance verification testing as well as all adjustments can be found at: http://cal.software.keysight.com/MXG/Help/MXGWebHelp.htm Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 444 Performance Verification and Adjustment Software Required Test Equipment Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide...
Page 445: 19 Instrument Firmware And Operating System
Keysight Technologies X-Series Signal Generators Service Guide 19 Instrument Firmware and Operating System What You Will Find in This Chapter This chapter provides information on the following: Instrument Firmware on page 446 Operating System on page 448...
Page 446: Instrument Firmware
Instrument Firmware and Operating System Instrument Firmware Instrument Firmware The instrument firmware contains all the software required to operate all the instrument functionality. This includes the basic instrument functionality and all the optional functionality and modes. To see what version of the instrument firmware is currently being used press Utility, Instrument Info, Diagnostic Info on the instrument front panel.
Page 447: Fpga Code Versus Firmware
Instrument Firmware and Operating System Instrument Firmware a. These are the part number found on the Utility, Instrument Info, Installed Board Info screen. If there is an assembly in an instrument with a part number listed in Table 19-1 a firmware version older than that listed in the Minimum Firmware column should not be used, as it will either generate errors or not perform as intended.
Page 448: Operating System
Instrument Firmware and Operating System Operating System Operating System The operating system used in the X-Series signal generators is Windows Compact Embedded (WinCE), which is a closed embedded operating system. Characteristics of this type of operating system are: — Operating system and instrument SW are compiled together into a single code image.
Page 449 LCD Display micro deck Outer Cover key pad, replacement Power Switch Keysight Technologies, contacting Rear Panel (N5181A) Keysight Technologies, returning signal generator Rear Panel (N5182A) Rear Panel (N5183B) RF connector USB Board lcd display, replacement lists assemblies and hardware options...
Page 450 Index options, descriptions USB board, replacement outer cover, replacement output power, checking vector BBG replacement performance tests, required after repair warnings and cautions post-repair procedures power checking power supply, replacement power switch, replacement real time aux power supply real time BBG, replacement rear panel (N5173B, replacement rear panel (N5181A), replacement rear panel (N5182A), replacement...
Page 451 This information is subject to change without notice. © Keysight Technologies 2012-2019 Edition 1, August 2019 N5180-90059 www.keysight.com...

This manual is also suitable for:

N5166b cxg N5171b exg N5172b exg N5173b exg N5181b mxg N5182b mxg ... Show all

Keysight Technologies X Series Service Manual

1. Overview

1 Overview

2 Boot up and Initialization

4 Self Test

6 Troubleshooting

7 Front Panel Assembly

8 Power Supply

9 CPU and Disk Drives

10 RF Assembly

11 Micro-Deck Assembly

12 Baseband Generators

13 Block Diagrams

Assemblies and Cables

Assemblies You Can Replace - "Outer Cover" on Page 336

Inner Bottom Cover

Front-Panel

A1 Power Supply

A2 Vector BBG Assembly (N5166B, N5172B, and N5182B)

A3 RF Assembly (N5171B, N5181B)

A3 RF Assembly (N5166B, N5172B, and N5182B)

A3 RF Assembly (N5173B, N5183B)

A3BT1 Battery

A4 SSD (N5166B, N5172B, and N5182B Only)

A5 Cpu

16 Pre and Post-Repair Procedures

17 Functional Tests

18 Performance Verification and Adjustment Software

19 Instrument Firmware and Operating System

Quick Links

Chapters

Troubleshooting

Related Manuals for Keysight Technologies X Series

Summary of Contents for Keysight Technologies X Series