Keysight Technologies X Series Service Manual
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Keysight Technologies X Series Service Manual

Uxg agile signal generators
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Keysight UXG X-Series Agile
Signal Generators
N5191A
N5193A
Service
Guide

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Summary of Contents for Keysight Technologies X Series

  • Page 1 Keysight UXG X-Series Agile Signal Generators N5191A N5193A Service Guide...
  • Page 2 COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH government requirements THESE TERMS, THE WARRANTY beyond those set forth in the © Keysight Technologies, Inc. 2015 - TERMS IN THE SEPARATE EULA shall apply, except to the 2017 AGREEMENT WILL CONTROL.
  • 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/uxg 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 Order Parts Fast............57 Shipping a Defective Assembly Back to Keysight Technologies ..... . .58 Frequency and Hardware Options.
  • Page 7 Contents Assembly Removal and Installation Overview ........95 Assembly Removal and Installation Procedure .
  • Page 8 Contents Removal Procedure ........... . .138 Replacement Procedure .
  • Page 9 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 10 • SCPI Basics SCPI Reference • Basic Function Commands • LXI System Commands • System Commands • Analog Modulation Commands • SCPI Command Compatibility • Troubleshooting Service Guide • Replaceable Parts • Assembly Replacement • Post-Repair Procedures • Safety and Regulatory Information •...

  • Page 11: Troubleshooting

    Keysight Technologies Agile Signal Generator Service Guide Troubleshooting Before Troubleshooting These troubleshooting instructions are for use by qualified personnel. To avoid electrical shock, do not perform any troubleshooting unless qualified. The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the instrument from all voltage sources before it is opened.

  • Page 12: Esd Information

    Troubleshooting 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 using two types of static-safe workstation protection: — conductive table-mat and wrist-strap combination —...

  • Page 13: Contacting Keysight Technologies

    Troubleshooting 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 at: http://www.Keysight.com/find/assist.

  • Page 14: 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 15: Overall Description

    Troubleshooting Overall Description The overall description provides a function overview of the Keysight UXG agile signal generators. The major functional blocks shown in the "Assemblies and Modules" and "Analog RF Block Diagram" are described in this section. — A1 Front Panel —...

  • Page 16: Overall Block Diagram

    32 - 40 GHz 10 - 20 GHz Band 3 25.6 - 32 GHz 0.01 - 40 GHz Band 2 20 - 25.6 GHz Band 1 A19 40 GHz Doubler (Option 540) A16 Frequency Multiplier 3 dB Doubler A20 Output Leveling Module 5.4-12 GHz 14 dB High Band 5.4 –...

  • Page 17: Assemblies And Modules

    Standard: RF out Front Option 1EM: RF out Rear Pulse Sync From DAC Board A1 Front Panel Pulse Video From DAC Board LF Out From DAC Board A20 Output Leveling Module Hi Band Detector A1A1 Front Panel - A20A1 Coupler Pulse Gate/In To DAC Board A15 RF Deck - A20A2 Detector...

  • Page 18: A1 Front Panel

    Troubleshooting A1 Front Panel The signal generator accepts inputs through the front panel hardkeys and the display softkeys, and provides outputs on the front panel display and through the RF output connector. Depending on the model, features, and options, the front panel may have modulation input/output BNC connectors installed but not operational (if the option associated with that connector is not installed).

  • Page 19: A2 Power Supply

    Troubleshooting A2 Power Supply The power supply has an internal line fuse that cannot be replaced. If the fuse opens, the power supply must be replaced. Voltages The main power supply is a switching supply designed with an automatic line- voltage and frequency selection.

  • Page 20: A5 Infrastructure Board

    Troubleshooting A5 Infrastructure Board The Infrastructure Board provides the following functions: — Connection between the CPU Carrier Board and Mother Board — Local power supplies from +12VDC for Infrastructure Board and CPU Carrier Board — CPU Power OK signal to CPU for booting process —...

  • Page 21: A8 Solid State Drive

    Troubleshooting A8 Solid State Drive The A8 Solid State Drive provides 480 GB of removable storage. All user information is stored on the SSD. The instrument operates without the SSD, but is unable to store user data. A9 External PCIe I/O Board The A9 provides external PCIe I/O control from the external instrument.

  • Page 22: A13 Rear Panel I/O Port Module

    Troubleshooting A13 Rear Panel I/O Port Module The Rear Panel I/O Fast Control Port board is a single removable module that fits into the rear panel slot on the UXG instrument. There are two configurations for the Rear Panel I/O Fast Control Port board, Option CC1 or CC2.

  • Page 23: A16 Frequency Multiplier

    Troubleshooting Highband/Midband/Lowband modules found on the block diagram. In addition, this board contains the I/O circuitry for external modulation input signals, pulse input/output signals, as well as the LF OUTPUT (Low-Frequency Output) port. Also, the A15 board converts the analog voltages, as detected by the Highband and Lowband detectors, to the digital signals required by the DAC Board for ALC control.

  • Page 24: A18 Lowband Output Module

    Troubleshooting A18 Lowband Output Module A18 Lowband Output Module is responsible for accepting Lowband and a portion of Midband signals, and adjusting these to the appropriate power level for frequencies between .01 to 3 GHz. This is achieved by passing the signals through a series of amplifiers, attenuators, and filters before passing the signal on to the output stage.

  • Page 25: Rear Panel

    Troubleshooting Rear Panel The rear panel contains the power line module, LAN, GPIB, 2 USB, PCIe, BNC 10 MHz input, BNC 10/100MHz output, BNC 10 MHz EFC, BNC System sync output 10 MHz, 100 MHz or 250 MHz, BNC System sync input 10 MHz, 100 MHz or 250 MHz, 6 GHz output SMA female connector, 6 GHz input SMA female connector and A13 Auxiliary I/O modules (Option CC1, 100 pins LVDS binary data format or Option CC2 50 pins BCD data format).
  • Page 26 Troubleshooting Highband and Midband Path - Frequencies Greater than 3.0 GHz The output of the DAC board 0.65 to 1.5 GHz is routed to the A14, Lowband/Highband Switch. Then, via the A14 High band path the signal is routed to A16 Frequency Multiplier. Depending on the desired output frequency, the signal is routed to proper doublers, 1st doubler, 2nd doubler, 3rd doubler and/or 4th doublers within the frequency multiplier.
  • Page 27 Troubleshooting Output Power Level/Automatic Leveling Control The output power control circuitry, commonly referred to as the ALC loop, comprises the following: — Two detectors: the Lowband Coupler/Detector (frequencies ≤ 3 GHz) in the A18 Lowband Output Module and the Highband Coupler/Highband Detector (frequencies >...

  • Page 28: Getting Started With Troubleshooting

    If this rare and unlikely symptom occurs it’s a potentially hazardous condition. Do not try to repair, instead, return the signal generator to Keysight Technologies for service. For the instrument to meet performance specifications and for accurate self-test results, allow a warm up period of 45 minutes within an operational temperature range of 0 to 55 °C.
  • Page 29 Troubleshooting No GPIB Activity page 44 Unleveled Conditions page 46 page 48 Troubleshooting the RF Path page 52 Troubleshooting Harmonic Spurious page 55 Troubleshooting Non-Harmonic Spurious Keysight Agile Signal Generator Service Guide...

  • Page 30: Self Test Overview

    Troubleshooting Self Test Overview The philosophy behind the self test is, “It is better to pass a defective signal generator than to fail a good signal generator.” The self test is designed as a diagnostic tool used to check instrument hardware. The self test does not require the signal generator to be adjusted before self-tests will pass.
  • Page 31 Troubleshooting A file in the instrument contains this dependency knowledge for the signal generator to use when identifying the most independent failure. Therefore, if A1, A2, and A3 self tests all fail, the signal generator reports A1 as the most independent failure.

  • Page 32: Running Self Test

    Troubleshooting Running Self Test Self tests are a series of internal complex tests that test the interconnects between individual circuit components and assemblies. Captured data is externally compared to expected results, thereby providing a current valuation of the signal generators functions. Run a complete self test when initially setting up the signal generator, after an assembly has been replaced;...
  • Page 33 Troubleshooting 1. Disconnect all unnecessary external cables, including GPIB, LAN, and USB cables. 2. Set the signal generator to Preset. Press System > Power On/Preset. If Power On is not set to (Preset) then press Power On and select Preset. 3.
  • Page 34 Troubleshooting 4. Locate the number and name of the failed test for your signal generator model in Table 1-1. The second column in the table lists the assembly in which the failure is likely to have occurred or other troubleshooting information for that test.
  • Page 35 Troubleshooting Table 1-1 Self Test Failures Sel f Test Failure Number Go to troubleshooting section: A2 Power Supply PSI: PS Interface Self Tests 101 - 104 Replace A2. Go to replacement section page 108 A11 Reference Module REF: Reference Main/Mezz Self Tests 301 - 407 Replace A11.
  • Page 36 Troubleshooting Table 1-1 Self Test Failures Sel f Test Failure Number Go to troubleshooting section: A17 Agile Mod/Filter AMF: Agile Mod Filter Self Tests 1001 - 1102 Replace A17. Go to replacement section page 119 A20 Output Leveling Module HBD: High Band Detector Self Tests 1201 - 1203 Replace A20.

  • Page 37: Self-Tests 5Xx: A12 Dac Board Self-Test Errors

    Troubleshooting Self-Tests 5xx: A12 DAC Board Self-Test Errors 507 DAC Output Test Disconnect the semi-rigid W9, 6 GHz rear panel jumper (shown in Figure 1-2). Connect the 6 GHz OUT port to a signal analyzer. Check for a 6 GHz signal at approximately 15 dBm.

  • Page 38: Unable To Run Self-Test Check (Instrument Does Not Power-On)

    Troubleshooting Unable to Run Self-Test Check (Instrument Does Not Power-On) If self-tests will not run, the most likely cause is a faulty A2 Power Supply, A6 CPU Carrier, or A7 CPU assembly. The A6 CPU Carrier and A7 CPU assembly rely on correct power supply voltages.

  • Page 39: Boot-Up Routine

    Troubleshooting Boot-up Routine The Boot-up routine is only necessary IF (at this time) Self-Tests cannot be performed or completed for some unknown reason. If you are unable to run a complete self test, monitor the boot-up routine to perhaps isolate a faulty assembly. The entire procedure should be completed, if possible, prior to troubleshooting an identified faulty assembly.
  • Page 40 Troubleshooting 10.With the unit still off, on the A5 Infrastructure board, refer to Figure 1-3 visually inspect and verify that only the +5V_STBY (5STBY) status green LED is lit. Other LED’s are off. 11.Turn the signal generator on, refer to Figure 1-3 to visually inspect and verify the connectivity (LINK) LED’s are lit.
  • Page 41 Troubleshooting Figure 1-4 Power Supply LEDs - Standby 14.Turn the signal generator on, refer to Figure 1-5 to visually inspect and verify the power on status LED’s are lit. The red PRG LED only turns on at an initial power-up and then goes off. —...
  • Page 42 Troubleshooting 15.Troubleshoot all items that did not function as expected. — May require firmware to be downloaded into the instrument so FPGA code is correct. Not upgrading the firmware to the current version could cause errors during instrument boot-up. — Only perform option backup if the CPU has been verified as the fault.

  • Page 43: The Green Front Panel Power Switch Led Or Yellow Standby Led Is Not Working

    Troubleshooting The Green Front Panel Power Switch LED or Yellow Standby LED is Not Working The power switch and standby LEDs are controlled by the +5V_STBY standby line. The +5V_STBY standby line is supplied by the A2 Power Supply and is routed through the A4 Mother Board, A5 Infrastructure Board and to the front panel.

  • Page 44: Troubleshooting Assembly Level Problems

    Troubleshooting Troubleshooting Assembly Level Problems To allow the power supplies to discharge, wait 30 seconds after unplugging the instrument before removing or installing any assemblies. Before permanently removing any instrument assembly, the instrument’s static and dynamic arrays must be configured for the exchange of assemblies. The process to do the appropriate configuration is performed automatically by the instrument with the “Assembly Removal and Installation Overview”...

  • Page 45: A2 Power Supply Troubleshooting

    Troubleshooting 4. Verify, by listening, that the fans are on. — If the fans are not on, go to “A3 The Fans are Not Working” on page 36, to troubleshoot them. A2 Power Supply Troubleshooting The main power supply is a switching supply designed with an automatic line- voltage and frequency selection.

  • Page 46: Check A8 Solid State Drive

    Troubleshooting Check A8 Solid State Drive 1. Turn power off 2. Remove SDD 3. Turn power on and check to see if unit boots up properly. 4. If it boot properly, turn power off, re-install the SSD and make sure it's aligned properly A3 The Fans are Not Working The four fans are connected directly to the A5 Infrastructure board.

  • Page 47: A6 Cpu Carrier And A7 Cpu Assembly Troubleshooting

    Troubleshooting — These LEDs indicate the communication between these boards. If any of the LEDs are off, check for proper FPGA revision of that assembly. Figure 1-7 A5 Infrastructure Board LEDs A6 CPU Carrier and A7 CPU Assembly Troubleshooting 1. Check A6 CPU status LEDs —...

  • Page 48: Front Panel Hardkeys Or Softkeys Are Not Functioning

    Troubleshooting Front Panel Hardkeys or Softkeys are Not Functioning Verify individual key functionality by performing the Front Panel Key Test. Pressing each key should darken the location on the front panel associated with that key. Press: Utility > Instrument Info > Front Panel Tests > Key Test —...

  • Page 49: Blank Or Missing Pixels

    Troubleshooting Blank or Missing Pixels Verify functionality by performing the front panel LCD Pixel tests. Press: Utility > Instrument Info > Front Panel Tests > Pixel Screen Tests — If the same area of the display is blank during each pixel test, replace the A1 Front Panel assembly.

  • Page 50: The Screen Saver Is Not Functioning

    Troubleshooting The Screen Saver is Not Functioning The screen saver delay can be set from 1 to 12 hours. The PIC Controller controls the screen saver by turning the LCD backlight on or off. 1. Verify the signal generator is turned on. 2.

  • Page 51: No Lan Activity

    Troubleshooting No LAN Activity The signal generator supports 100-Base T-LAN. When the signal generator is connected to an active LAN, one of the green DS1 LEDs, viewable through the rear panel, will be on and the other green DS1 LED will blink. —...

  • Page 52: No Front Panel Usb Activity

    Troubleshooting No Front Panel USB Activity The front panel Type-A USB connectors support data transfers. Not all USB memory sticks are compatible with the Type-A USB connector on this signal generator. Go to www.Keysight.com/find/x-series for a list of USB storage devices that work with this signal generator.

  • Page 53: No Rear-Panel Usb Activity

    Troubleshooting No Rear-Panel USB Activity The rear-panel type Mini-B 5 pin USB connector is used for remotely controlling the signal generator using SCPI commands. 1. Connect a USB cable between a controller PC that has been configured to communicate through a USB cable and the signal generator. The PC should detect the signal generator almost immediately.

  • Page 54: No Gpib Activity

    Troubleshooting No GPIB Activity The signal generator supports a general purpose interface bus (GPIB). The GPIB enables communication with compatible devices such as external controllers. 1. Replace the GPIB cable with a known working cable. 2. Send a SCPI command to the signal generator. 3.

  • Page 55: Error Messages

    Troubleshooting Error Messages For more information on Error Messages refer to the documentation CD, N5191-90002, or online at: http://literature.cdn.keysight.com/litweb/pdf/N5191-90010.pdf Keysight Agile Signal Generator Service Guide...

  • Page 56: Troubleshooting Unlevels

    Troubleshooting Troubleshooting Unlevels An Automatic Leveling Control (ALC) loop on the A20 Output Leveling Module provides leveled output power. The ALC loop is a feedback control system that monitors RF power and maintains power 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 57 Troubleshooting Table 1-2 Maximum Output Power Maximum Output Power (Option 520/52E) Frequency Standard Option AT1/AT2 Option AT1/AT2 Electronic Attenuator Electronic Attenuator Bypassed Inline 10 MHz to 13 GHz +10 dBm +10 dBm −1 dBm > 13 GHz to 18 GHz +10 dBm +10 dBm −4 dBm...

  • Page 58: Troubleshooting The Rf Path

    Troubleshooting Troubleshooting the RF Path Troubleshooting the RF Path procedure: — Preset the signal generator — Turn User Max Settable off (System-> User Max Settable Power-> User Max Settable Power State -> off) — Set a frequency — Open ALC loop (ALC Off) —...
  • Page 59 Troubleshooting Table 1-3 Device Output Power - 20 GHz Models Output Frequency (GHz) ≥ 0.01 to < 1.43 ≥ 1.43 to < 2.85 ≥ 2.85 to < 5.70 ≥ 5.70 to < 11.4 ≥ 11.4 to < 20.0 N Mul tiplier A17J5 Frequency ≥...
  • Page 60 Troubleshooting Table 1-4 Device Output Power - 40 GHz Models Output Frequency (GHz) ≥ .01 to < 1.43 ≥ 1.43 to < 2.85 ≥ 2.85 to < 5.70 ≥ 5.70 to < 11.4 ≥ 11.4 to < > < 22.8 22.8 to 40.0 Mul tiplier...
  • Page 61 Troubleshooting Table 1-4 Device Output Power - 40 GHz Models Output Frequency (GHz) ≥ .01 to < 1.43 ≥ 1.43 to < 2.85 ≥ 2.85 to < 5.70 ≥ 5.70 to < 11.4 ≥ 11.4 to < > < 22.8 22.8 to 40.0 Mul tiplier...

  • Page 62: Troubleshooting Harmonic Spurious

    Troubleshooting Troubleshooting Harmonic Spurious Harmonics are multiples of the fundamental output frequency produced by a signal generator. Specifically, the second harmonic is two times the output frequency and its amplitude is measured relative to the fundamental (carrier) output frequency amplitude; the power lever of a harmonic is expressed as -xx dBc.

  • Page 63: Troubleshooting Harmonic Spurious By Fundamental Frequency

    Troubleshooting Troubleshooting Harmonic Spurious by Fundamental Frequency Harmonic spurious problems will most likely be associated with the A16 (Frequency Multiplier), A17 (Agile Mod/Filter), A18 (Low Band Output Module), or A19 (40 GHz Doubler) if Option 540 is installed. Table 1-5 Harmonic Spurious Failed Frequency Most Likely Cause...

  • Page 64: To Verify Harmonic Performance At The Rf Output

    Troubleshooting To Verify Harmonic Performance at the RF Output 1. Signal Generator Settings a. Set the frequency of the signal generator to the harmonic frequency being measured. For example, when planning to measure the second harmonic of a 1 GHz signal, set the frequency of the signal generator to 2 GHz.

  • Page 65: Troubleshooting Non-Harmonic Spurious

    Troubleshooting Troubleshooting Non-Harmonic Spurious Non-harmonic spurious responses are unwanted signals that are not related to the fundamental output frequency but are produced by the internal frequency synthesis section of the signal generator. There are many different groupings a spur can fall into. The grouping determines what assembly is most likely generating the spur.
  • Page 66 Troubleshooting Keysight Agile Signal Generator Service Guide...

  • Page 67: Replaceable Parts

    1. Determine the part number. 2. Determine the quantity required. 3. Mail this information to the nearest Keysight Technologies office or, in the U.S., call the hot-line number listed in the following section. To order a part not listed in the replaceable parts lists, mail the following information to the nearest Keysight Technologies office.

  • Page 68: Shipping A Defective Assembly Back To Keysight Technologies

    Keysight Technologies. (Keysight Technologies pays postage on boxes mailed within the 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 Agile Signal Generator Service Guide...

  • Page 69: Frequency And Hardware Options

    Replaceable Parts Frequency and Hardware Options The following options are available with the Keysight X-Series signal generators. Frequency Options N5191A N5193A 10 MHz to 20 GHz frequency range 10 MHz to 40 GHz frequency range Hard ware Options N5191A N5193A Type-N (f) RF output connector Move all connectors to rear panel Add mechanical + solid state attenuator assembly...

  • Page 70: Assemblies, Cables, And Hardware

    Replaceable Parts Assemblies, Cables, and Hardware Refer to Table 2-1 Table 2-2 for X-Series Agile signal generators. Table 2-1 Assemblies and Hardware Description Part Number Figure Number A1 Front Panel light color W1312-60151 dark color W1312-60250 includes the following parts: (also order the appropriate nameplate and overlay for your instrument) A1A1 Front Panel Interface Board A1A2 Keypad Board...
  • Page 71 Replaceable Parts Table 2-1 Assemblies and Hardware Description Part Number Figure Number Overlay, Front Panel, left, 1EM light color N5191-80010 dark color N5191-80030 Overlay, Front Panel, right, 1EM light color N5191-80011 dark color N5191-80031 A2 Power Supply N5191-60153 A3 Fan Module N5191-60154 A4 Motherboard N5191-60005...
  • Page 72 Replaceable Parts Table 2-1 Assemblies and Hardware Description Part Number Figure Number A20 Output Leveling Assembly Option AT2/520/52E, tested N5191-60370 Option AT2/520/52E/1EM, tested N5191-60371 Option 520/52E, tested N5191-60372 Option 520/52E/1EM, tested N5191-60373 Option AT2/540/54E, tested N5191-60374 Option AT2/540/54E/1EM, tested N5191-60375 Option 540/54E, tested N5191-60376 Option 540/54E/1EM, tested...
  • Page 73 Replaceable Parts Table 2-1 Assemblies and Hardware Description Part Number Figure Number Strap Handle Assembly - includes the following parts light color N5191-60103 dark color N5191-60183 Strap Assembly Ground Spring Handle Retainer - Qty 2 End Cap - Qty 2 Screw - machine M5 x 0.8, 18 mm LG, TX - Qty 2 Keysight Agile Signal Generator Service Guide...
  • Page 74 Replaceable Parts Table 2-2 Cables Reference Description Part Number Figure Designator Number Cable Assembly - Coaxial A31/A40 50-Ohm MCX-Male Bulkhead Front 8121-2587 Mounted BNC-Female 975 mm-LG, Color clip "Brown/Orange" to "EXT2" 2-22 2-23 Cable Assembly - Coaxial A31/A40 50-Ohm MCX-Male Bulkhead Front 8121-2587 Mounted BNC-Female 975 mm-LG, Color clip "Brown/Yellow"...
  • Page 75 Replaceable Parts Table 2-2 Cables Reference Description Part Number Figure Designator Number Cable Assembly - RF, Semi-Rigid, Multiplier High Band Output to Mod Filter N5191-20126 2-14 High Band Input 2-15 2-16 2-17 Cable Assembly - RF, Semi-Rigid, Mod Filter Low Band Output to Low Band N5191-20239 2-14 Board Input.
  • Page 76 Replaceable Parts Table 2-2 Cables Reference Description Part Number Figure Designator Number Cable Assembly, Ribbon, Transfer Switch N5191-60113 2-20 Cable Assembly, Ribbon, Mechanical Attenuator, UNM N5191-60114 2-20 Cable Assembly, Ribbon, Front Panel N5191-60107 2-22 Cable Assembly-Coaxial A31/A40 50-Ohm MCX-Male BNC-Female 8121-2580 750mm-LG, Color clip "Brown/Red"...

  • Page 77: Hardware

    Replaceable Parts Hardware This section lists part numbers for hardware and other instrument parts in your signal generator. — “Front Panel” on page 68 — “Rear Panel” on page 69 — “Assemblies and Cables” — "Major Assemblies" on page 70 —...
  • Page 78 Replaceable Parts Front Panel Figure 2-1 Front Panel View - light color Figure 2-2 Front Panel View - dark color Item Description Item Description RF Connector W2 - Ext 1 Input USB ports W1 - Ext 2 Input RPG Knob W3 - Gate/Pulse/Trigger Input W6 - LF Output W5 - Video Output...
  • Page 79 Replaceable Parts Rear Panel Figure 2-3 Rear Panel View Item Description PCIe x8l 10/100 MHz OUT SYSTEM SYNC IN RF SYNC OUT Host USB FCP (Option CC1 or CC2) Device USB GPIB Trig 2 Trig 3-14 Trig 1 6 GHz INPUT - W9 6 GHz OUTPUT - W9 EFC IN 10 MHz IN...
  • Page 80 Replaceable Parts Assemblies and Cables Figure 2-4 Major Assemblies Description Part Number A1 Front Panel light color W1312-60151 dark color W1312-60250 A2 Power Supply N5191-60153 A3 Fan Module N5191-60154 A5 Infrastructure Board not field replaceable A6 CPU Carrier Board N5191-60331 A7 CPU N5191-60332 A8 Solid State Drive...
  • Page 81 Replaceable Parts Figure 2-5 Microdeck Assemblies Description Part Number A15 RF Deck Interface N5191-60044 A16 Frequency Multiplier N5191-60002 A17 Agile Mod/Filter 5087-7357 A18 Lowband Output Module N5191-60006 A19 40 GHz Doubler (Option 540/54E) 5087-7405 A20 Output Leveling Assembly Table 2-1 Keysight Agile Signal Generator Service Guide...
  • Page 82 Replaceable Parts Figure 2-6 Outer Instrument Cover and Associated Parts Item Description Part Number Strap Handle assembly light color N5191-60103 dark color N5191-60183 Rear Panel Feet light color 5041-9611 dark color 5041-7903 Outside Instrument Cover light color N5191-00012 dark color N5191-00068 Bottom Feet light color...
  • Page 83 Replaceable Parts Figure 2-7 Bottom Covers Item Description Part Number Rear Bottom Cover N5191-00004 Front Bottom Cover N5191-00003 Keysight Agile Signal Generator Service Guide...
  • Page 84 Replaceable Parts Figure 2-8 Rear Panel Assemblies Item Description Part Number A8 Solid State Drive N5191-60139 A13 Module, LVDS I/O Interface (Rear Panel I/O Port) N5191-60137 A13 Module, BCD I/O Interface (Rear Panel I/O Port) N5191-60138 Keysight Agile Signal Generator Service Guide...
  • Page 85 Replaceable Parts Figure 2-9 Fan Module Item Description Part Number A3 Fan Module N5191-60154 Keysight Agile Signal Generator Service Guide...
  • Page 86 Replaceable Parts Figure 2-10 Motherboard Item Description Part Number A4 Motherboard N5191-60005 Keysight Agile Signal Generator Service Guide...
  • Page 87 Replaceable Parts Figure 2-11 Midplane Board Item Description Part Number A10 Midplane Board N5191-60009 Keysight Agile Signal Generator Service Guide...
  • Page 88 Replaceable Parts Figure 2-12 CPU Board Assemblies Item Description Part Number A6 CPU Carrier Board N5191-60331 A7 CPU N5191-60332 A8 Solid State Drive N5191-60139 A9 External PCIe I/O Board N5191-60017 Keysight Agile Signal Generator Service Guide...
  • Page 89 Replaceable Parts Figure 2-13 DAC/Reference Assemblies Description Part Number A11 Reference Module N5191-60145 A12 DAC Board N5191-60001 A14 Lowband/Highband Switch N5191-60014 N5191-20117 N5191-20118 Keysight Agile Signal Generator Service Guide...

  • Page 90: W14 Cable Assembly - Rf, Semi-Rigid, Multiplier High Band Output To Mod Filter N5191-20126

    Replaceable Parts Figure 2-14 Microdeck Cables Option 520/52E, UNM Item Description Part Number Cable Assembly - RF, Semi-Rigid, Agile Cleanup Bypass Output N5191-20122 Cable Assembly - RF, Semi-Rigid, Agile Cleanup Output to Multiplier Input N5191-20123 Cable Assembly - RF, Semi-Rigid, Low Band Output to Mod Filter Low Band N5191-20238 Input Cable Assembly - RF, Semi-Rigid, Multiplier Low Band Output to Mod Filter Low...

  • Page 91: Note: For Instruments With Serial Prefix < My/Sg/Us5619Xxxx, Cables W12

    Replaceable Parts Figure 2-15 Microdeck Cables Option 520/52E, AT1/AT2, UNM Item Description Part Number Cable Assembly - RF, Semi-Rigid, Agile Cleanup Bypass Output N5191-20122 Cable Assembly - RF, Semi-Rigid, Agile Cleanup Output to Multiplier N5191-20123 Input Cable Assembly - RF, Semi-Rigid, Low Band Output to Mod Filter Low N5191-20238 Band Input Cable Assembly - RF, Semi-Rigid, Multiplier Low Band Output to Mod...

  • Page 92: Option 540/54E, 2.4 Mm Connector, Unm

    Replaceable Parts Figure 2-16 Microdeck Cables Option 540/54E, UNM Item Description Part Number Cable Assembly - RF, Semi-Rigid, Agile Cleanup Bypass Output N5191-20122 Cable Assembly - RF, Semi-Rigid, Agile Cleanup Output to Multiplier N5191-20123 Input Cable Assembly - RF, Semi-Rigid, Low Band Output to Mod Filter Low N5191-20238 Band Input Cable Assembly - RF, Semi-Rigid, Multiplier Low Band Output to Mod...

  • Page 93: W23 Cable Assembly - Rf, Semi-Rigid, Mod Filter Output To 40 Ghz Doubler N5191-20240

    Replaceable Parts Figure 2-17 Microdeck Cables Option 540/54E, AT1/AT2, UNM Item Description Part Number Cable Assembly - RF, Semi-Rigid, Agile Cleanup Bypass Output N5191-20122 Cable Assembly - RF, Semi-Rigid, Agile Cleanup Output to Multiplier Input N5191-20123 Cable Assembly - RF, Semi-Rigid, Low Band Output to Mod Filter Low N5191-20238 Band Input Cable Assembly - RF, Semi-Rigid, Multiplier Low Band Output to Mod...
  • Page 94 Replaceable Parts Figure 2-18 1EM Cables - Option 520/52E Item Description Part Number Cable Assembly - RF, Semi-Rigid, Mech Attn Output to RF N5191-20137 Out, Option 520/52E, 3.5 mm Connector, 1EM Cable Assembly - RF, Semi Rigid, Mech Attn Output to RF N5191-20146 Out, Option 520/52E, Type N Connector, 1EM Cable Assembly - RF, Semi-Rigid, Mod Filter Output to...
  • Page 95 Replaceable Parts Figure 2-19 1EM Cables - Option 540/54E Item Description Part Number Cable Assembly - RF, Semi-Rigid, Mech Attn Output to RF N5191-20139 Out, Option 540/54E, 2.4 mm Connector, 1EM Cable Assembly - RF, Semi-Rigid, 40 Doubler Output to N5191-20178 Coupler Input, Option 540/54E, 1EM Keysight Agile Signal Generator Service Guide...
  • Page 96 Replaceable Parts Figure 2-20 Microdeck Ribbon Cables Item Description Part Number Cable Assembly, Ribbon, Transfer Switch N5191-60113 Cable Assembly, Ribbon, Mechanical Attenuator, UNM N5191-60114 Keysight Agile Signal Generator Service Guide...

  • Page 97: W30 Cable Assembly, Line Voltage N5191-60102

    Replaceable Parts Figure 2-21 Line Module Description Part Number A21 Line Module) N5191-60104 W30 Cable Assembly, Line Voltage N5191-60102 Keysight Agile Signal Generator Service Guide...
  • Page 98 Replaceable Parts Figure 2-22 Front Panel Cables Figure 2-23 Front Panel Cables to Microdeck Keysight Agile Signal Generator Service Guide...
  • Page 99 Replaceable Parts Item Description Part Number Cable Assembly - Coaxial A31/A40 50-Ohm MCX-Male Bulkhead Front 8121-2587 Mounted BNC-Female 975 mm-LG, Color clip "Brown/Orange" to "EXT2" Cable Assembly - Coaxial A31/A40 50-Ohm MCX-Male Bulkhead Front 8121-2587 Mounted BNC-Female 975 mm-LG, Color clip "Brown/Yellow" to "EXT1" Cable Assembly - Coaxial A31/A40 50-Ohm MCX-Male Bulkhead Front 8121-2589 Mounted BNC-Female 675 mm-LG, Color clip "Brown/Green"...

  • Page 100: Miscellaneous

    Replaceable Parts Miscellaneous This section lists part numbers for miscellaneous items that can be used with your signal generator. Documentation Description Part Number Getting Started Guide N5191-90003 Service Guide N5191-90007 The UXG Agile Signal Generator online documentation can also be found on the web at http://www.Keysight.com/find/N5193A Electrostatic Discharge (ESD) Protective Supplies...

  • Page 101: Abbreviations Used In Part Descriptions

    Replaceable Parts Abbreviations Used in Part Descriptions This section defines the reference designators, abbreviations, and option numbers that are used in the part descriptions throughout this chapter. Reference Definition Designator assembly attenuator lamp electrical connector; jack cable; transmission path; wire Abbreviation Definition buttonhead (screws)
  • Page 102 Replaceable Parts Keysight Agile Signal Generator Service Guide...

  • Page 103: Assembly Replacement

    Keysight Technologies Agile Signal Generator Service Guide Assembly Replacement Before You Replace an Assembly 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.

  • Page 104: Tools You Will Need

    Assembly Replacement Tools you will need Figure 3-1 TORX Tool Description Keysight Part Number TORX Hand Driver - Size T-8 8710-1614 TORX Hand Driver - Size T-10 8710-1623 TORX Hand Driver - Size T-15 8710-1622 TORX Hand Driver - Size T-20 8710-1615 5/8 inch nut driver source locally...

  • Page 105: Assembly Removal And Installation Overview

    Assembly Replacement Assembly Removal and Installation Overview Assembly Removal and Installation Procedure This section is meant to be a high level overview of the process for replacing an assembly. 1. Faulty/bad assembly is identified by using the troubleshooting information Chapter 2.
  • Page 106 Assembly Replacement Figure 3-2 Hardware Assembly Installation and Removal Softkeys Keysight Agile Signal Generator Service Guide...

  • Page 107: After Replacing Or Repairing An Assembly

    Assembly Replacement After Replacing or Repairing an Assembly After you have replaced or repaired an assembly, certain performance tests may have to be performed. Refer to Chapter 4, “Post-Repair Procedures and Operational Performance Verification”, on page 157, for the list of performance tests required for each assembly.

  • Page 108: Assemblies You Can Replace

    Assembly Replacement Assemblies You Can Replace — Infrastructure board not replaceable. Contact Keysight Technologies. — “Outer Cover” on page 99 — “Inner Bottom Covers” on page 101 — “Front Frame” on page 103 — “A2 Power Supply” on page 108 —...

  • Page 109: Outer Cover

    Assembly Replacement Outer Cover Tools Required — T-20 driver Removal Procedure Refer to Figure 3-3 for this procedure. 1. Disconnect the power cord. 2. Using the T-20 driver, loosen the screws (1) and remove the strap handles (2) from both sides of the instrument. 3.

  • Page 110: Replacement Procedure

    Assembly Replacement Replacement Procedure 1. Reverse the order of the removal procedures. When sliding the outer cover back on the signal generator keep fingers away from the back of the front panel. They can get severely pinched. 2. Recommended torque for all screws is 21 in–lbs. Keysight Agile Signal Generator Service Guide...

  • Page 111: Inner Bottom Covers

    Assembly Replacement Inner Bottom Covers Tools Required — T-10 driver Removal Procedure Refer to Figure 3-4 Figure 3-5 for this procedure. 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to “Outer Cover” on page 3.
  • Page 112 Assembly Replacement Figure 3-4 Rear Bottom Cover Figure 3-5 Front Bottom Cover Keysight Agile Signal Generator Service Guide...

  • Page 113: Front Frame

    Assembly Replacement Front Frame Tools Required — T-20 driver — needle-nose pliers — socket wrench and 1/2-inch slotted deep socket Removal Procedure Use a soft surface or a soft cloth to protect the front frame while performing this procedure. 1. Disconnect the power cord. 2.
  • Page 114 Assembly Replacement 6. Refer to Figure 3-7. Before removing the following cables, it is necessary to identify them with a label of some kind in order to reinstall them in the correct location. Unplug cables W1, W2, W3, W4, W5, and W6 from the Microdeck.
  • Page 115 Assembly Replacement 7. Refer to Figure 3-8. Using the T-20 driver, remove the six screws (1) (0515-2044). Figure 3-8 Front Frame Removal The six screws that attach the front frame to the chassis are recommended to be one-time use only hardware. These should be replaced with the new screws (0515-2044) if available. These screws are provided in the front panel replacement kit.
  • Page 116 Assembly Replacement 8. Refer to Figure 3-9. Separate the front frame slightly from the chassis. Remove the cables from the cable clip shown if necessary to provide slack for the grey cables. Figure 3-9 Remove Cables from Clip 9. Refer to Figure 3-10.

  • Page 117: Replacement Procedure

    Assembly Replacement 10.Before removing the cables from the front frame, it is necessary to identify them with a label of some kind in order to reinstall them in the correct location. 11.Refer to Figure 3-11. Using the 1/2-inch slotted deep socket remove the nut and washer from each connector from inside the front panel.

  • Page 118: A2 Power Supply

    Assembly Replacement A2 Power Supply Tools Required — T-10 driver Removal Procedure Refer to Figure 3-14 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover from the signal generator. Refer to “Outer Cover” on page 3. Remove the front bottom cover from the signal generator. Refer to “Inner Bottom Covers”...
  • Page 119 Assembly Replacement 5. Refer to Figure 3-13. Unplug the line module (1) from the power supply. Figure 3-13 Unplug Line Module 6. Refer to Figure 3-14. Using the T-10 driver, remove the eight screws (1) (0515-1946) that secure the power supply to the chassis. Figure 3-14 A2 Power Supply Screws Removal Keysight Agile Signal Generator Service Guide...

  • Page 120: Replacement Procedure

    Assembly Replacement 7. Refer to Figure 3-15. Remove the power supply by pulling up on the attached handle. Figure 3-15 A2 Power Supply Removal Replacement Procedure 1. Reverse the order of the removal procedure. Ensure the power supply is seated properly and the connector pins are not bent. 2.

  • Page 121: Microdeck Assembly

    Assembly Replacement Microdeck Assembly Tools Required — T-10 driver — socket wrench and 5/16 inch slotted deep socket Removal Procedure This procedure is to remove the Microdeck from the instrument as a complete assembly. It is not necessary to remove the Microdeck assembly from the instrument in order to replace any of the Microdeck sub-assemblies.
  • Page 122 Assembly Replacement Figure 3-16 Microdeck Cables Keysight Agile Signal Generator Service Guide...
  • Page 123 Assembly Replacement 5. Refer to Figure 3-17. Using the 5/16 inch slotted socket, remove semi-rigid cables W10 and W11. Disconnect one end of the output cable as shown. This procedure is to remove the Microdeck from a UNM instrument. To remove the Microdeck from a 1EM instrument (connectors at the rear) it will be necessary to remove cables W18, W20, or W22 (dependent on the option).

  • Page 124: Replacement Procedure

    Assembly Replacement 6. Refer to Figure 3-18. Remove the six screws (1) (0515-0664) that attach the microdeck to the chassis. The microdeck can now be lifted out of the chassis. Take care to remove the correct screws that attach the microdeck to the chassis. They are located close to other screws that do not need to be removed.

  • Page 125: Microdeck Sub-Assemblies

    Assembly Replacement Microdeck Sub-Assemblies To gain access to any of the microdeck sub-assemblies it is necessary to remove the instrument outer cover and the inner bottom rear cover. Refer to “Outer Cover” on page 99 “Inner Bottom Covers” on page 101.
  • Page 126 Assembly Replacement Figure 3-19 Microdeck Sub-Assemblies Keysight Agile Signal Generator Service Guide...

  • Page 127: A16 Frequency Multiplier

    Assembly Replacement A16 Frequency Multiplier Tools Required — T-10 driver — 5/16 inch open-ended wrench — socket wrench and 5/16 inch slotted deep socket Removal Procedure 1. Refer to Figure 3-20. Remove cables W13 and W14. Using the 5/16 inch slotted socket remove cable W11.
  • Page 128 Assembly Replacement Replacement Procedure 1. Reverse the order of the removal procedure. When replacing the Frequency Multiplier, align with the guide pins on the deck. 2. Recommended torque for all screws is 9 in–lbs. 3. Recommended torque for all cable connectors is 9 in–lbs. 4.

  • Page 129: A17 Agile Mod/Filter

    Assembly Replacement A17 Agile Mod/Filter Tools Required — T-10 driver — 5/16” open-ended wrench Removal Procedure 1. Refer to Figure 3-21. Remove cables W12, W13, and W14. For Option 540/54E instruments also remove cables W23 and W25. Option 540/54E instrument is shown. Option 520/52E instruments will have a different cable at the W25 location that will need to be removed.
  • Page 130 Assembly Replacement 2. Remove the four screws (1) (0515-0664) that attach the A17 Agile Mod/Filter to the deck. The Agile Mod/Filter can now be lifted from the deck. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Recommended torque for all screws is 9 in–lbs. 3.

  • Page 131: A18 Lowband Output Module

    Assembly Replacement A18 Lowband Output Module Tools Required — T-10 driver — 5/16 inch open-ended wrench — socket wrench and 5/16 inch slotted deep socket Removal Procedure 1. Refer to Figure 3-22. Remove cables W12 and W15. Using the 5/16 inch slotted socket remove cable W10.
  • Page 132 Assembly Replacement Replacement Procedure 1. Reverse the order of the removal procedure. 2. Recommended torque for all screws is 9 in–lbs. 3. Recommended torque for all cable connectors is 9 in–lbs. 4. Replace the inner bottom rear cover and the instrument outer cover. Refer “Inner Bottom Covers”...

  • Page 133: A19 40 Ghz Doubler - Option 540/54E Only

    Assembly Replacement A19 40 GHz Doubler - Option 540/54E Only Tools Required — T-10 driver — 5/16” open-ended wrench Removal Procedure 1. Refer to Figure 3-23. Remove cables W23 and W25. Also disconnect the cable at the location indicated. Figure 3-23 A19 40 GHz Doubler Cables and Screws 2.
  • Page 134 Assembly Replacement Replacement Procedure 1. Reverse the order of the removal procedure. 2. Recommended torque for all screws is 9 in–lbs. 3. Recommended torque for all cable connectors is 9 in–lbs. 4. Replace the inner bottom rear cover and the instrument outer cover. Refer “Inner Bottom Covers”...

  • Page 135: A20 Output Leveling Assembly

    Assembly Replacement A20 Output Leveling Assembly Tools Required — T-10 driver — 5/16” open-ended wrench Removal Procedure 1. For Option 520/52E instruments, refer to Figure 3-24. For Option 540/54E instruments, refer to Figure 3-25. For Option 520/52E 1EM instruments, refer to Figure 3-26.
  • Page 136 Assembly Replacement Figure 3-24 Option 520/52E - Remove Existing A20 Output Leveling Assembly (Front Panel RF Output) Keysight Agile Signal Generator Service Guide...
  • Page 137 Assembly Replacement Figure 3-25 Option 540/54E - Remove Existing A20 Output Leveling Assembly (Front Panel RF Output) Keysight Agile Signal Generator Service Guide...
  • Page 138 Assembly Replacement Figure 3-26 Option 520/52E 1EM - Remove Existing A20 Output Leveling Assembly (Rear Panel RF Output) Keysight Agile Signal Generator Service Guide...
  • Page 139 Assembly Replacement Figure 3-27 Option 540/54E 1EM - Remove Existing A20 Output Leveling Assembly (Rear Panel RF Output) Keysight Agile Signal Generator Service Guide...
  • Page 140 Assembly Replacement Figure 3-28 Option 520/52E AT1/AT2 - Remove Existing A20 Output Leveling Assembly (Front Panel RF Output with Option AT1/AT2) Keysight Agile Signal Generator Service Guide...
  • Page 141 Assembly Replacement Figure 3-29 Option 540/54E AT1/AT2 - Remove Existing A20 Output Leveling Assembly (Front Panel RF Output with Option AT1/AT2) Keysight Agile Signal Generator Service Guide...
  • Page 142 Assembly Replacement Figure 3-30 Option 520/52E AT1/AT2, 1EM - Remove Existing A20 Output Leveling Assembly (Rear Panel RF Output with Option AT1/AT2) Keysight Agile Signal Generator Service Guide...
  • Page 143 Assembly Replacement Figure 3-31 Option 540/54E AT1/AT2, 1EM - Remove Existing A20 Output Leveling Assembly (Rear Panel RF Output with Option AT1/AT2) Keysight Agile Signal Generator Service Guide...
  • Page 144 Assembly Replacement Replacement Procedure 1. Reverse the order of the removal procedure. 2. Recommended torque for all screws is 9 in–lbs. 3. Recommended torque for all cable connectors is 9 in–lbs. 4. Replace the inner bottom rear cover and the instrument outer cover. Refer “Inner Bottom Covers”...

  • Page 145: A3 Fan Module

    Assembly Replacement A3 Fan Module Tools Required — T-10 driver Removal Procedure 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to “Outer Cover” on page 3. Place the signal generator upside down on a flat surface. 4.

  • Page 146: Replacement Procedure

    Assembly Replacement 5. Refer to Figure 3-33. Unplug the fan wires from the Infrastructure board. 6. Using the T-10 driver remove the nine screws (1) (0515-0663) that attach the fan assembly to the chassis. The fan assembly can now be removed from the chassis.

  • Page 147: Rear Panel Plugins

    Assembly Replacement Rear Panel Plugins Tools Required — T-15 driver Removal Procedure 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to “Outer Cover” on page 3. Refer to Figure 3-34. Remove the A8 Solid State Drive (1) and the A13 Module (2) by using the T-15 driver to loosen the thumb screws where indicated and pulling out of the rear panel.

  • Page 148: Cpu

    Assembly Replacement Tools Required — T-10 driver — Flat blade screwdriver Removal Procedure To avoid internal calibration failures and potential post-repair errors, before replacing the CPU board, the instrument’s static and dynamic arrays must be configured for the exchange of assemblies. The process to do the appropriate configuration is performed with the Hardware Assembly Installation and Removal front panel softkeys.
  • Page 149 Assembly Replacement Figure 3-35 CPU Assembly Removal Keysight Agile Signal Generator Service Guide...

  • Page 150: Replacement Procedure

    Assembly Replacement Figure 3-36 CPU Assembly Removal from Chassis Replacement Procedure 1. Reverse the order of the removal procedures. 2. Recommended torque for all screws is 9 in–lbs unless otherwise noted. Keysight Agile Signal Generator Service Guide...

  • Page 151: Cpu Board Replacement

    Assembly Replacement CPU Board Replacement 1. Refer to Figure 3-37. Using the T-10 driver, remove the 4 screws (1) (0515-2141) that attach the CPU board to the carrier board. Remove the heat sink. Carefully lift the CPU board to disengage from the connector and lift off of the carrier board.

  • Page 152: Finalize Cpu Installation

    Assembly Replacement 3. To replace the CPU board, carefully align the screw holes with the standoffs on the carrier board. Press down on the CPU board to engage with connector. Replace the heat sink and the 4 screws. Torque to 6 inch-lbs.
  • Page 153 Assembly Replacement 4. Once the boot process is complete, press System, Instrument Info, Diagnostic Info. The display should show all the installed options as shown in Figure 3-39. Figure 3-39 Instrument Information Keysight Agile Signal Generator Service Guide...

  • Page 154: Dac/Reference/Lb Switch Assembly

    Assembly Replacement DAC/Reference/LB Switch Assembly Tools Required — T-10 driver — Flat blade screwdriver Removal Procedure 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to “Outer Cover” on page 3. Place the signal generator flat with the front-panel facing you. 4.
  • Page 155 Assembly Replacement Figure 3-40 Remove Semi -Rigid Cables Keysight Agile Signal Generator Service Guide...
  • Page 156 Assembly Replacement 7. Refer to Figure 3-41 Figure 3-42. Using the T-10 driver, remove the 2 screws (1) (0515-1103) that attach the DAC/Ref/LB Switch assembly to the chassis. Use two flat blade screwdrivers in the DAC assembly notches to pry out the assembly and disconnect it from the Midplane board. Figure 3-42 shows the placement of the flat blade screwdriver in the notch.
  • Page 157 Assembly Replacement Figure 3-42 DAC/Ref/LB Switch Assembly Removal from Chassis Keysight Agile Signal Generator Service Guide...

  • Page 158: Replacement Procedure

    Assembly Replacement Replacement Procedure 1. Reverse the order of the removal procedures. When reinstalling the DAC./Reference assembly into the chassis, take care to ensure the connectors on the Midplane board are engaged and the pins are not bent. 2. Recommended torque for all screws is 9 in–lbs unless otherwise noted. DAC/Reference/LB Switch Disassembly Refer to Figure...
  • Page 159 Assembly Replacement 1. Remove cables W7 and W8. 2. Refer to Figure 3-44. To separate the Reference assembly from the DAC assembly, remove the 6 screws (1) (0515-1946) on the bottom. Figure 3-44 Reference/DAC Separation 3. Refer to Figure 3-45. To remove the LB/HB Switch assembly, remove the 4 screws (1) (0515-0372) that attach the switch to the DAC board.
  • Page 160 Assembly Replacement To reassembly the Reference/DAC/LB assembly: 1. Reverse the order of the removal procedures. 2. Recommended torque for all screws is 9 in–lbs unless otherwise noted. 3. Recommended torque for the cables is 9 in-lbs. Keysight Agile Signal Generator Service Guide...

  • Page 161: Rear Panel

    Assembly Replacement Rear Panel Tools Required — T-10 driver — T-15 driver — 5/16” open-ended wrench Removal Procedure 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to “Outer Cover” on page 3. Refer to Figure 3-46.
  • Page 162 Assembly Replacement 4. Refer to Figure 3-47. Remove the BNC cap and screw. 5. Using the 5/8-inch nut driver, remove the 5 nuts (1) that attach the connectors to the rear panel. Using the open-end wrench, remove the W9 cable (2). Using the hex driver, remove the 2 hex screws (3) from the connector.

  • Page 163: Replacement Procedure

    Assembly Replacement Replacement Procedure 1. Reverse the order of the removal procedures. 2. Refer to Figure 3-48. Torque screw (3) (0515-0430) to 6 in-lbs. Recommended torque for all other screws is 9 in–lbs. 3. Refer to Figure 3-47. Using the 5/8-inch nut driver, torque the connector nuts (1) to 21 in-lbs.

  • Page 164: Rf Connector

    Assembly Replacement RF Connector Tools Required — T-20 driver — 5/16-in open-end wrench driver Removal Procedure 1. Disconnect the power cord. 2. Remove the outer-cover from the signal generator. Refer to “Outer Cover” on page 3. Perform step 1 through step 9 of the front frame removal procedure.
  • Page 165 Assembly Replacement 5. Refer to Figure 3-50. Using the open-end torque wrench, loosen and remove the RF connector from the bracket. Figure 3-50 Remove RF Connector Keysight Agile Signal Generator Service Guide...

  • Page 166: Replacement Procedure

    Assembly Replacement Replacement Procedure 1. Reverse the order of the removal procedures. 2. Refer to Figure 3-51. When reinstalling the RF connector, carefully hand tighten the connector while at the same time using needle nose pliers to align the semi-rigid cable to mate correctly with the back of the RF connector.

  • Page 167: Post-Repair Procedures And Operational Performance Verification

    Keysight Technologies Agile Signal Generator Service Guide Post-Repair Procedures and Operational Performance Verification Post Repair Procedures This chapter provides information that will enable you to return an instrument to full operation following the replacement of any instrument assembly. The following tables list the adjustments and performance verification tests needed after an assembly replacement.

  • Page 168: Assembly A20

    Post-Repair Procedures and Operational Performance Verification Assembly A20 For Serial Prefixes < xx5646xxxx Before replacing the A20 assembly, check the Hardware ID (HWID) for the installed Electronic Attenuator (EAT) and the High Band Detector. This will determine what adjustments and performance tests need to be run after the A20 replacement.
  • Page 169 Post-Repair Procedures and Operational Performance Verification For Serial Prefixes ≥ xx5646xxxx and newer HWID numbers After the A20 assembly is replaced, perform the following adjustments and performance tests: Ad justments Required Ad justment Name Calibration Array Restore Abus Calibration Open Loop Relative Amplitude Calibration ALC Detector Linearity Calibration ALC Detector Flatness Calibration Open Loop Absolute Amplitude Calibration...

  • Page 170: Post Repair Adjustments Table

    Post Repair Adjustments Adjustments Calibration Array Default Calibration Array Restore Abus Calibration Reference Mezzanine DRO Adjust Reference 100 MHz VCO Tank DAC Calibration Reference 100 MHz Kv Curve Calibration Reference 300 MHz Output Power Calibration Reference Mezzanine DRO Kv Curve Adjustment Reference Main Timebase Frequency Adjustment M40X Cal Array Port Calibration (Option 540/54E) M20X Power Calibration...

  • Page 171: Post Repair Performance Tests Table

    Post Repair Tests Performance Tests Self Tests Maximum Output Power Power Level Accuracy (Option AT1/AT2) Non-Harmonic Spurious Harmonic and Sub-Harmonic Spurious Pulse Modulation On/Off Ratio (Option PM1/PM2) Internal FM Deviation Accuracy (Option UNT/UT1) Internal FM Distortion (Option UNT/UT1) Internal Phase Modulation Deviation Accuracy (Option UNT) Internal Phase Modulation Distortion (Option UNT/UT1)
  • Page 172 Post-Repair Procedures and Operational Performance Verification Keysight Agile Signal Generator Service Guide...

  • Page 173: Safety And Regulatory

    Keysight Technologies Agile Signal Generator Service Guide Safety and Regulatory This chapter provides information on the following: — “General Safety Considerations” on page 164 — “Lithium Battery Disposal” on page 166 — “Assistance” on page 166 — “Certification” on page 166...

  • Page 174: General Safety Considerations

    Safety and Regulatory General Safety Considerations The following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its meaning before operating this instrument. Warning denotes a hazard. It calls attention to a condition or situation that could result in personal injury or loss of life.
  • Page 175 Safety and Regulatory Replace battery only with the same or equivalent type recommended. Discard used batteries according to manufacturer’s instructions. If this product is not used as specified, the protection provided by the equipment could be impaired. This product must be used in a normal condition (in which all means for protection are intact) only.

  • Page 176: Lithium Battery Disposal

    When the battery on the A14 CPU 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. Figure 5-1...

  • Page 177: Instrument History

    Keysight Technologies Agile Signal Generator Service Guide Instrument History How to Use this Chapter This chapter documents changes that have been made to the N519xA signal generators. If your signal generator is an early version these changes may affect it.

  • Page 178: May 2017

    Instrument History May 2017 Serial prefix ≥ US/MY/SG MY5646xxxx: Introduction of new Keysight color palette for external parts (charcoal gray and other gray tones). Added new part numbers for new color parts. New part numbers for A19 40 GHz Doubler and most versions of A20 Output Leveling Assembly.

  • Page 179: December 9, 2014

    Instrument History December 9, 2014 Initial release of the N5193A, UXG Signal Generators (N5193A only) — Serial prefix US/MY/SG5418 — Firmware release A.01.10 Keysight Agile Signal Generator Service Guide...
  • Page 180 Instrument History Keysight Agile Signal Generator Service Guide...
  • Page 181 Index Index Numerics A4 Mother Board description 40 GHz Doubler A5 Infrastructure Board description description troubleshooting A1 Front Panel A6 CPU Carrier description description A1 LCD Display replacement troubleshooting troubleshooting A10 Midplane A7 CPU description description A11 Reference Module replacement description troubleshooting A12 DAC Board...
  • Page 182 Infrastructure Board blank or missing pixels description block diagram inner bottom covers, replacement boot-up routine Install Assembly softkey instrument history contacting Keysight Technologies Keysight Technologies description contacting CPU Carrier returning a signal generator description LAN, no activity DAC Board...
  • Page 183 Index performance tests, required after repair A2 Power Supply pixels, blank or missing A3 Fan Module post-repair procedures A5 Infrastructure Board Power Supply A6 CPU Carrier description A7 CPU blank or missing pixels error messages Rear Panel front panel hardkeys or softkeys description harmonic spurious Rear Panel I/O Port Module...
  • Page 184 This information is subject to change without notice. © Keysight Technologies 2015-2017 Edition 1, May 2017 N5191-90007 www.keysight.com...

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