Service Guide Publication Number 54932- 97006 October 2013 © Agilent Technologies, Inc.
The Agilent Technologies Infiniium 90000 Oscilloscope at a Glance Ease of use with high performance The Agilent Technologies Infiniium oscilloscopes combine unprecedented ease-of-use with highperformance digitizing oscilloscope functionality to simplify your design and analysis measurement tasks. • Traditional oscilloscope front-panel interface provides direct access to the controls needed for most troubleshooting tasks.
In This Service Guide This guide provides the service information for the Agilent Technologies 90000 Q- Series oscilloscopes. It is divided into seven chapters. Chapter 1, "General Information," describes which oscilloscope models are covered by this guide, supplied accessories, and where to find the specifications for the 90000 QSeries oscilloscopes. Chapter 2, "Calibration," describes the types of calibrations, and how and when to run the user calibration procedure.
1 Instruments covered by this service guide Accessories supplied 7 Specifications and Characteristics 7 General Information 6
Instruments covered by this service guide Oscilloscopes manufactured after the date this manual was released may be different from those described in this manual. The release date of this manual is shown on the title page. This manual will be revised when necessary. If you have an oscilloscope that was manufactured after the release of this manual, please check the Agilent Technologies website at www.agilent.com to see whether a newer version of this manual is available.
Chapter 1: General Information Accessories supplied Accessories supplied The following accessories are supplied. • Mouse • Stylus • Keyboard • Front panel cover • Calibration cable (the 50 GHz and 62 GHz bandwidth models include a second calibration cable for the RealEdge inputs) • Connector Savers (qty.
Chapter 1: General Information Specifications and Characteristics 8
2 Running a self calibration Calibration 11
Calibration A calibration is simply an oscilloscope self- adjustment. The purpose of a calibration is performance optimization. There are three ways to calibrate an Infiniium oscilloscope: • User mode, also known as a normal calibration, user calibration, or self calibration. User mode includes the minimum set of calibrations and is intended to be run by oscilloscope users. The user must be logged in as an administrator to run a self calibration.
Chapter 2: Calibration Running a self calibration Running a self calibration Let the Oscilloscope Warm Up Before Adjusting. Warm up the oscilloscope for 30 minutes before starting the calibration procedure. Failure to allow warm up may result in inaccurate calibration. The self calibration uses signals generated in the oscilloscope to calibrate channel sensitivity, offsets, and trigger parameters.
Chapter 2: Calibration Running a self calibration Figure 2-1 Calibration Dialog Box Clear this check box before starting calibration Click here to start calibration 4 Click Start, then follow the instructions on the screen. The routine will ask you to do the following steps: a Disconnect everything from all inputs and Cal Out. b Indicate whether you want to run time scale and interleave correction calibrations.
3 Vertical Performance Verification 15 Offset Accuracy Test 16 DC Gain Accuracy Test 23 Analog Bandwidth - - Maximum Frequency Test Time Scale Accuracy (TSA) Test 37 Performance Test Record 39 Testing Performance 28
This section describes performance test procedures. Performance Test Interval The procedures in this section may be performed for incoming inspection and should be performed periodically to verify that the oscilloscope is operating within specification. The recommended test interval is once per year or after 2000 hours of operation. Performance should also be tested after repairs or major upgrades. Performance Test Record A test record form is provided at the end of this section.
Chapter 3: Testing Performance Vertical Performance Verification This section contains the following vertical performance verification tests: • • • • Offset Accuracy Test DC Gain Accuracy Test Analog Bandwidth - - Maximum Frequency Test Time Scale Accuracy (TSA) Test 15
Offset Accuracy Test CAUTION Ensure that the input voltage to the oscilloscope never exceeds ±5 V. Let the oscilloscope warm up before testing. The oscilloscope under test must be warmed up (with the oscilloscope application running) for at least 30 minutes prior to the start of any performance test. Specifications Offset Accuracy ≤ 3.5 V: ±(2% of channel offset + 1% of full scale + 1 mV) > 3.5 V: ±(2% of channel offset + 1% of full scale) Full scale is defined as 8 vertical divisions.
Chapter 3: Testing Performance Offset Accuracy Test b When the Acquisition Setup window appears, enable averaging and set the # of averages to 256 as shown below. 3 Configure the scope to measure Average voltage on channel 1 as follows: a Change the vertical scale of channel 1 to 10 mV/div. b Click the V avg measurement on the left side of the screen.
Chapter 3: Testing Performance Offset Accuracy Test c When the Enter Measurement Info window appears, ensure that the V avg function is set up as follows and then click OK: Source = Channel 1 Measurement Area = Entire Display 4 Press [Clear Display] on the scope and wait for the #Avgs value (top right corner of screen) to return to 256. Record the scope's mean V avg reading in the Zero Error Test section of the Performance Test Record.
Chapter 3: Testing Performance Offset Accuracy Test 6 Repeat step 5 for the remaining vertical sensitivities for channel 1 in the Zero Error Test section of the Performance Test Record. 7 Press [Default Setup], then turn off channel 1 and turn the channel 2 display on. 8 Configure the scope to measure V avg on Channel 2 as follows: a Select Setup > Acquisition. When the Acquisition Setup window appears, enable averaging and set the # of averages to 256.
Chapter 3: Testing Performance Offset Accuracy Test Offset Gain Test Procedure 1 Make the connections to scope channel 1 as shown below.
Chapter 3: Testing Performance Offset Accuracy Test is set up as follows and then click OK: Source = Channel 1 Measurement area = Entire Display 4 Set the channel 1 offset value to 400.0 mV. This can be done using the front panel control or: a Pull down the Setup menu and select Channel 1 or click the Channel 1 setup icon. b Change the vertical sensitivity (Scale) of channel 1 to 10 mV/div. c Click the Offset control arrows to change the offset value or click on the offset value and enter 400.
Chapter 3: Testing Performance Offset Accuracy Test 7 Change the channel 1 offset value to - 400.0 mV. 8 Set the Cal Out voltage to - 400.0 mV. 9 Press [Clear Display] on the scope, wait for the #Avgs value (top left corner of screen) to return to 256, and then record the DMM voltage reading as VDMM- and the scope Vavg reading as VScope- in the Offset Gain Test section of the Performance Test Record. 10 Change the channel 1 offset value to 0 mV. 11 Set the Cal Out voltage to 0 mV.
Chapter 3: Testing Performance DC Gain Accuracy Test DC Gain Accuracy Test CAUTION Ensure that the input voltage to the oscilloscope never exceeds ±5 V. Let the oscilloscope warm up before testing. The oscilloscope under test must be warmed up (with the oscilloscope application running) for at least 30 minutes prior to the start of any performance test. Specifications DC Gain Accuracy ±2% of full scale at full resolution channel scale (±2.5% for 5 mV/div) Full scale is defined as 8 vertical divisions.
Chapter 3: Testing Performance DC Gain Accuracy Test Procedure 1 Make the connections to scope channel 1 as shown below.
Chapter 3: Testing Performance DC Gain Accuracy Test b When the Acquisition Setup window appears, enable averaging and set the # of averages to 256 as shown below. 3 Set the Cal Out voltage (VCal Out) to +30 mV as follows: a Select Utilities > Calibration Output. b Change the Signal Output function to DC (top left corner). c Set the Level to 30 mV. d Click Close. 4 Set the channel 1 vertical sensitivity value to 10 mV/div.
Chapter 3: Testing Performance DC Gain Accuracy Test c Select the Vavg measurement as shown below.
Chapter 3: Testing Performance DC Gain Accuracy Test Record the mean reading 6 Change the Cal Out voltage to - 30 mV. 7 Press [Clear Display] on the scope, wait for the #Avgs value to return to 256 and then record the DMM voltage reading and the scope V avg reading in the DC Gain Test section of the Performance Test Record. 8 Calculate the DC gain using the following expression and record this value in the DC Gain Test section of the Performance Test Record.
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Analog Bandwidth - - Maximum Frequency Test CAUTION Ensure that the input voltage to the oscilloscope never exceeds ±5 V. Let the oscilloscope warm up before testing. The oscilloscope under test must be warmed up (with the oscilloscope application running) for at least 30 minutes prior to the start of any performance test. Specification Analog Bandwidth (-3 dB) DSO/DSAX92004Q 20.0 GHz DSO/DSAX92504Q 25.
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Description Critical Specifications Recommended Model/ Part Numbers Connector Saver 3.
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Connections for all oscilloscope models, channels 1- 4 Microwave CW Generator E8257D Power meter N1912A Oscilloscope Power splitter 11667C Connection saver Power sensor cable 11901A adapter Microwave cable Power sensor N1922A 11901C adapter Notes • Connect output 1 of the 11667C splitter to the scope Channel n input directly using the 11901A adapter and a connector saver, without any additional cabling or adapters.
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test Connections for 50 and 62 GHz oscilloscope models, channels 1R- 3R Microwave CW Generator E8257D Power meter N1912A Oscilloscope Power splitter Anritsu V241C Power sensor cable Power sensor N8488A Microwave cable Gore 67 GHz Notes • Connect output 1 of the V241C splitter to the scope Channel n input directly without any additional cabling or adapters. • Minimize the use of any adapters. • Ensure that 1.
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test d Select Setup > Acquisition and then set up the acquisition parameters as follows: Memory Depth = Automatic Sampling rate = 160 GSa/s (maximum) Sin(x)/x Interpolation = Auto Averaging = Disabled e Select Measure > Voltage > V rms.
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test f When the Enter Measurement Info window appears, configure this measurement as follows: Source = Channel 1 Measurement Area = Entire Display RMS Type = AC 7 Set the generator to apply a 50 MHz sine wave with a peak- to- peak amplitude of about 4 divisions. • Use the following tables to determine the approximate required signal amplitude. The amplitude values in the tables are not absolutely required.
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test 8 Measure the input power to the scope channel and convert this measurement to Volts RMS using the expression: V in = P meas × 50Ω For example, if the power meter reading is 4.0 μW, then Vin = (4.0*10- 6 * 50Ω)1/2 = 14.1 mVrms. Record the RMS voltage in the Analog Bandwidth - Maximum Frequency Check section of the Performance Test Record (Vin @ 50 MHz).
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test 11 Change the generator frequency to the maximum value for the model being tested as shown in the table below. It is not necessary to adjust the signal amplitude at this point in the procedure.
Chapter 3: Testing Performance Analog Bandwidth -- Maximum Frequency Test 16 Change the scope setup as follows: a Change the channel vertical sensitivity to 20 mV/div. b Reset the horizontal scale to 16 ns/div (to display 8 cycles of a 50 MHz waveform). 17 Change the generator output as follows: a Reset the generator frequency to 50 MHz. b Change the amplitude to the value suggested for this sensitivity in Table 3- 1.
Chapter 3: Testing Performance Time Scale Accuracy (TSA) Test Time Scale Accuracy (TSA) Test This procedure verifies the maximum TSA specification for the oscilloscope. Equipment Required Equipment Critical Specifications Recommended Model/Part Synthesized sine wave source Output Frequency: ≥ 10 MHz Output Amplitude: 0 dBm Frequency Resolution: 0.1 Hz Agilent E8257D PSG 10 MHz frequency reference Output Frequency: 10 MHz Absolute Freq. Error: < ±0.0275 ppm Agilent 53132A opt.
Chapter 3: Testing Performance Time Scale Accuracy (TSA) Test Connections Connect the equipment as shown in the following figure. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Procedure Configure the sine wave source to output a 0 dBm (600 mVpp) sine wave into 50 ohms with a frequency of 10.00002000 MHz. Adjust source amplitude such that displayed sine wave is 600 mVpp. Press [Default Setup] on the oscilloscope. Set channel 1's vertical scale to 100 mV/div. Set the oscilloscope sample rate to 100 kSa/s.
Chapter 3: Testing Performance Performance Test Record Performance Test Record Agilent Technologies Agilent 90000 Q-Series Oscilloscopes Model Number _____________________ Tested by___________________ Serial Number ___________________________ Work Order No.
Chapter 3: Testing Performance Performance Test Record Offset Gain Test Vertical Sensitivity Channel 1 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 2 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 3 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 4 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 1R 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 3R 1
Chapter 3: Testing Performance Performance Test Record DC Gain Accuracy Test Vertical Sensitivity Channel 1 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 2 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 3 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 4 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel 1R 10 mV/div 20 mV/div 50 mV/div 100 mV/div 200 mV/div 500 mV/div 1 V/div Channel
Chapter 3: Testing Performance Performance Test Record Analog Bandwidth - Maximum Frequency Check Max frequency: DSOX/DSAX92004Q = 20 GHz, DSOX/DSAX92504Q = 25 GHz, DSOX/DSAX93304Q = 32 GHz, DSOX/DSAX95004Q = 50 GHz, DSOX/DSAX96204Q = 62 GHz .
Chapter 3: Testing Performance Performance Test Record Time Scale Accuracy Measured Time Scale Error (ppm) Years Since Calibration (years) Low Test Limit (ppm) High Test Limit (ppm) Pass/Fail ___________ ___________ ___________ ___________ ___________ 43
Chapter 3: Testing Performance Performance Test Record 44
4 Primary Trouble Isolation 47 Power Supply Troubleshooting 52 Setting Up the BIOS 56 Motherboard Verification 57 Display Troubleshooting 58 Acquisition/Backplane Assembly Troubleshooting Keyboard Troubleshooting 62 LED Troubleshooting 63 Touch Screen Troubleshooting 64 Oscillator Board Troubleshooting 65 Checking Probe Power Outputs 66 Before You Contact Agilent 67 Troubleshooting 60
Troubleshooting The service strategy for troubleshooting oscilloscopes is to isolate problems to a faulty assembly, then use the disassembly and assembly procedures in the "Replacing Assemblies" chapter to replace the defective assembly. Read the Safety Notices at the back of this guide before servicing the oscilloscope. Before performing any procedure, review any cautions and warnings included in the procedures.
Chapter 4: Troubleshooting Primary Trouble Isolation Primary Trouble Isolation The main procedural tool in this chapter is the flowchart. The Primary Trouble Isolation flowchart in Figure 4- 1 shows the entire troubleshooting path from a failed oscilloscope to a working one, and directs you to other sections in this chapter where the procedures are described in detail. Reference letters on the flowcharts point to procedural steps that explain the brief instructions in the chart.
Chapter 4: Troubleshooting Primary Trouble Isolation A Perform power-up. Connect the oscilloscope power cord and press the power button in the lower left corner of the front panel. If the oscilloscope is working properly, it will take several minutes to start up. The LEDs on the front panel should all illuminate brightly for several seconds, then dim. If the LEDs do not light up, refer to “LED Troubleshooting” later in this chapter.
Chapter 4: Troubleshooting Primary Trouble Isolation D Check the front panel response by running the Keyboard and LED self tests. Follow these steps to verify correct keyboard operation. 1 Select Self Test from the Utilities menu. 2 Select Keyboard Test from the Self Test drop- down list box, then click Start Test. The Front Panel Keyboard Test window appears with a symbolic representation of the keyboard. See Figure 4- 3.
Chapter 4: Troubleshooting Primary Trouble Isolation The Front Panel LED Test screen appears, showing a symbolic representation of all front panel LED indicators. See Figure 4- 4. Figure 4-4 LED test screen 3 Repeatedly press the [Single] button on the front panel to step through and highlight each LED symbol in the test screen. You can also step through the LEDs by pressing the << Prev or Next >> buttons on the screen. Verify that the corresponding LEDs on the front panel are the only ones illuminated.
Chapter 4: Troubleshooting Primary Trouble Isolation E Run a self calibration. 1 Complete a self calibration by following the procedures in chapter 2. 2 If the calibration test fails, look at the details to find the channel associated with the failure. • If the failure is associated with a RealEdge Technology channel, replace the two acquisition boards associated with the RealEdge Technology.
Chapter 4: Troubleshooting Power Supply Troubleshooting Power Supply Troubleshooting This section provides information to help you isolate the problem to the assembly level when the power system is not operating properly. There are two sets of LEDs on the backplane assembly. Seeing which of these LEDs are illuminated will help you identify the reason and the remedy for the power failure.
Chapter 4: Troubleshooting Power Supply Troubleshooting PS01 ON ON ON ON PS02 ON ON ON ON LED PS03 ON ON OFF OFF PS04 ON OFF ON OFF Type of Fault Supply late Supply late Supply late Supply late ON ON ON ON OFF OFF OFF OFF ON ON OFF OFF ON OFF ON OFF Under-voltage Under-voltage Under-voltage Under-voltage OFF OFF OFF OFF OFF OFF OFF OFF OFF ON ON ON OFF OFF X ON OFF ON OFF X Over-voltage Over-voltage Over-voltage Over-voltage Power button pushed at wrong time PS11 ON ON ON ON PS12 ON ON ON O
Chapter 4: Troubleshooting Power Supply Troubleshooting PS71 ON ON ON ON PS72 ON ON ON ON LED PS73 ON ON OFF OFF PS74 ON OFF ON OFF Type of Fault Supply late Supply late Supply late Supply late ON ON ON ON OFF OFF OFF OFF ON ON OFF OFF ON OFF ON OFF Under-voltage Under-voltage Under-voltage Under-voltage OFF OFF OFF OFF OFF OFF OFF OFF OFF ON ON ON OFF OFF X ON OFF ON OFF X Over-voltage Over-voltage Over-voltage Over-voltage Power button pushed at wrong time What To Do Replace Backplane Ass
Chapter 4: Troubleshooting Power Supply Troubleshooting LED Type of Fault What To Do AOT0* Over-temperature Replace acquisition assembly 4 AOT1* Over-temperature Replace acquisition assembly 4 AOT2* Over-temperature Replace acquisition assembly 3 AOT3* Over-temperature Replace acquisition assembly 3 AOT4* Over-temperature Replace acquisition assembly 2 AOT5* Over-temperature Replace backplane assembly 2 AOT6* Over-temperature Replace backplane assembly 1 AOT7* Over-temperature Rep
Chapter 4: Troubleshooting Setting Up the BIOS Setting Up the BIOS If the BIOS settings become corrupt, the Infiniium oscilloscope PC motherboard will not recognize the hard drive and the oscilloscope may not start. To configure the motherboard BIOS parameters to the default settings, follow these steps: 1 Connect the power cable to the oscilloscope. 2 Connect the external keyboard to the rear panel.
Chapter 4: Troubleshooting Motherboard Verification Motherboard Verification If you have been through the Power Supply Troubleshooting section of this chapter and the oscilloscope still does not stay powered up, the problem may be with the motherboard. To diagnose this problem, follow these steps. 1 Remove the top panel. 2 Turn the oscilloscope on. If the unit beeps once after about 5 to 10 seconds but fails to boot up, the motherboard is defective and needs to be replaced.
Chapter 4: Troubleshooting Display Troubleshooting Display Troubleshooting Figure 4-8 Display Troubleshooting Flowchart &RQQHFW H[WHUQDO PRQLWRU WR 9*$ SRUW 7XUQ RQ SRZHU 'RHV GLVSOD\ DSSHDU RQ H[W PRQLWRU" 1R 5HSODFH PRWKHUERDUG
Chapter 4: Troubleshooting Display Troubleshooting WARNING INJURY CAN RESULT! Use caution when the oscilloscope fan blades are exposed as they can cause injury. Disconnect the power cable before working around the fans. Use extreme caution in working with the oscilloscope when the cover is removed. If the procedure requires you to have the cover off, be careful not to let these fan blades come in contact with any part of your body.
Chapter 4: Troubleshooting Acquisition/Backplane Assembly Troubleshooting Acquisition/Backplane Assembly Troubleshooting This section describes which board assembly to replace if any of the scope self tests fail. When the self- test error message file is generated it is sent to the following location: C:\ProgramData\Agilent\Infiniium\selftest\SelfTestLog.txt The error message usually indicates the channel with the error.
Chapter 4: Troubleshooting Acquisition/Backplane Assembly Troubleshooting Test Group and Test Name Acq Flash RAM Tests Error Type Assembly to Replace Merwig6, Merwig7, Hedwig12, Hedwig13, Hedwig14, Hedwig15, Oak6 Replace acquisition assembly 4. If error still occurs, put original acquisition assembly back into scope and replace backplane assembly. Test is currently not being run.
Chapter 4: Troubleshooting Keyboard Troubleshooting Keyboard Troubleshooting If some of the knobs fail the keyboard self test but some work properly, replace the rear board of the keyboard assembly. If none of the knobs work properly, replace the front board of the keyboard assembly. If any of the keys do not work properly but the LEDs light up, replace the front board of the keyboard assembly. If the keys still do not work properly, check the incoming cables.
Chapter 4: Troubleshooting LED Troubleshooting LED Troubleshooting LED Failure During System Start- Up When power is turned on to the scope, the front panel LEDs should all illuminate brightly for several seconds, then dim. The RealEdge LED (on 50 and 62 GHz models) should pulse off and on. When the Infiniium software starts up, the LEDs should turn off.
Chapter 4: Troubleshooting Touch Screen Troubleshooting Touch Screen Troubleshooting Figure 4-9 Touch screen flowchart 'RHV WKH WRXFK VFUHHQ ZRUN"
Chapter 4: Troubleshooting Oscillator Board Troubleshooting Oscillator Board Troubleshooting If you encounter any problems with the oscillator board, first check all cabling and connections to ensure they are secure and tight: • Check the connection between the oscillator board and the backplane board. • Check the 10 GHz DRO output cable. • Check the reference to the oscillator board cable. • Check the 32 GHz DRO power cable (50 and 62 GHz models).
Chapter 4: Troubleshooting Checking Probe Power Outputs Checking Probe Power Outputs Probe power outputs are on the front panel, in the lower left corner of the 3.5mm inputs. Refer to Figure to check the power output at the connectors. Measure the voltages with respect to the ground terminal on the front panel, located near Aux Out. Measure the voltages at pins 2 and 5 only (+12V and - 12V). These supplies, and all others, come from the front panel.
Chapter 4: Troubleshooting Before You Contact Agilent Before You Contact Agilent If you have read this Troubleshooting chapter and have unresolved questions about troubleshooting the oscilloscope, be ready to provide system information such as the current software version and installed options. This information will be useful when you contact Agilent Technologies. To find and save system information, follow these steps: 1 Select Help > About Infiniium.
Chapter 4: Troubleshooting Before You Contact Agilent 68
5 ESD Precautions 70 Tools Required 70 Returning the Oscilloscope to Agilent Technologies for Service 71 Removing and Replacing the Top Panel and Motherboard 72 Removing and Replacing the Hard Disk Drive 77 Removing and Replacing the Power Supply 78 Removing and Replacing the Front Panel Assembly and Bottom Panel 79 Removing and Replacing Front Panel Assembly Parts 86 Removing and Replacing RealEdge Components 91 Removing and Replacing the Acquisition Boards/Backplane Assembly 94 Setting the Calibration Fa
Replacing Assemblies Use the procedures in this chapter when removing and replacing assemblies and parts in the Agilent Technologies oscilloscopes. In general, the procedures that follow are placed in the order to be used to remove a particular assembly. The procedures listed first are for assemblies that must be removed first. The graphics in this chapter are representative of the oscilloscope at the time of this printing. Your unit may look different.
Chapter 5: Replacing Assemblies Returning the Oscilloscope to Agilent Technologies for Service Returning the Oscilloscope to Agilent Technologies for Service Before shipping the oscilloscope, contact Agilent Technologies, Inc. for more details. 1 Write the following information on a tag and attach it to the oscilloscope.
Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard Removing and Replacing the Top Panel and Motherboard Note that all sheet metal holes that are supposed to have screws placed in them are marked by lines on four sides of the hole. 1 Remove the four M3 screws that connect the top panel to the rear. When replacing, use a Torx T10 to torque to 5 in- lbs. Figure 5-1 2 Slide the top panel back 1 to 2 inches and then lift it off.
Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard 3 Disconnect the PCIe cable by pressing down on the locking tab and pulling the cable. Figure 5-4 4 Disconnect the red SATA cable. Figure 5-5 5 Disconnect the display cable (left circle in photo) and the standby switch cable (right circle, next to the SATA cable).
Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard 6 Disconnect the two USB cables. Figure 5-7 7 Disconnect the power cable from the four locations shown in the next three figures.
Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard Figure 5-10 8 If you need to replace the motherboard fan, disconnect the cable from the fan to the motherboard now. Otherwise, you do not need to disconnect it. Figure 5-11 9 Disconnect the USB controller cable.
Chapter 5: Replacing Assemblies Removing and Replacing the Top Panel and Motherboard 10 Remove the PCIe cable from the motherboard and set it aside to put on the new motherboard. 11 Remove the six M3 screws from the motherboard. When replacing, torque the screws to 5 in- lbs. Figure 5-13 12 Pull the motherboard away from the back panel and then lift it out. Place the motherboard in an anti- static bag. 13 To reassemble the motherboard, reverse the above procedure.
Chapter 5: Replacing Assemblies Removing and Replacing the Hard Disk Drive Removing and Replacing the Hard Disk Drive 1 Loosen the two screws on back of the hard disk drive. Figure 5-15 2 Pull the hard drive out. Figure 5-16 3 Remove the four screws connecting the disk drive to the bottom of the plate. 4 To replace the hard disk drive, reverse this procedure.
Chapter 5: Replacing Assemblies Removing and Replacing the Power Supply Removing and Replacing the Power Supply WARNING SHOCK HAZARD! If the power supply is defective it could have a dangerous charge on some capacitors. This charge could remain for many days after removing power from the supply. 1 Loosen the rear panel screw and lower the handle. Figure 5-17 2 Remove the power supply. 3 Reverse the procedure to replace the power supply.
Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel Removing and Replacing the Front Panel Assembly and Bottom Panel 1 Remove the top panel as described previously. Disconnect the two USB cables and the display and standby switch cables as described previously. Unsnap the locking clip to remove the USB cable. Also disconnect the front panel power cable from the backplane board.
Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel 3 Turn the oscilloscope upside- down and remove the four M3 screws connecting the bottom panel to the back panel. When replacing, torque the screws to 5 in- lbs. Figure 5-20 4 Remove the five M3 screws from the bottom panel. Figure 5-21 5 Remove the bottom panel.
Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel 6 Disconnect each input cable from each of the four attenuator connectors using a 5/16- inch Hex torque wrench. When reconnecting, torque to 8 in- lbs. The length of the cable will guide the installation (longest cable on left, shortest cable on right). Figure 5-22 7 Disconnect the attenuator power cable from each input channel attenuator.
Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel 9 Disconnect the Aux Out and Cal Out cables from both the front panel and the backplane board. Pull straight back to remove the cables from the backplane board. CAUTION: Be sure to pull straight back to avoid bending or breaking the connection to the backplane board. When reconnecting, gently reinsert each cable. You will hear a snap when it is fully seated.
Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel 2 Disconnect the cable connecting the pilot cables to the RealEdge auxiliary module. When reconnecting, torque the connectors to 8 in- lbs. using a 5/8- in. hex torque wrench. Figure 5-28 3 Disconnect the RealEdge assembly power cables. Figure 5-29 4 Remove the four M3 screws.
Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel 5 Gently remove the RealEdge assembly, keeping the cables from getting caught. Gently slide it toward the back, careful to avoid catching any parts on the sheet metal flange on the chassis. Figure 5-31 6 Flip the RealEdge assembly over and disconnect the remaining cables: two input cables, two attenuator cables, and the two cables coming from the 32 GHz DRO.
Chapter 5: Replacing Assemblies Removing and Replacing the Front Panel Assembly and Bottom Panel Finishing Removal of the Front Panel 1 To finish removing the front panel, remove the four M3 screws (two on each side) connecting the front panel to the bottom of the chassis. When replacing, torque the screws to 5 in- lbs. Figure 5-33 2 Pull off the front panel, carefully feeding the USB cable through the opening. 3 To replace the front panel assembly, reverse this procedure.
Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts Removing and Replacing Front Panel Assembly Parts Remove the front panel assembly as described in the previous section. Front Panel Clutches, Connectors, and Knobs WARNING This step will ruin the clutch. You will have to replace the clutch with a new one. 1 Use a thin item such as a ribbon to protect the oscilloscope from scratches, and pull on the dark gray plastic clutches to pop them off of the oscilloscope.
Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts 3 Remove the six screws from the back of the front panel. Figure 5-36 4 If the oscilloscope is a 20, 25, or 32 GHz model, it will have a filler plate covering Trig Out and Aux Trig. Remove this plate from the back of the front panel by removing the nuts and washers from the cables. Figure 5-37 Remove nuts and washers 5 Lift off the front panel bezel.
Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts 6 The front circuit board of the keyboard assembly is connected to the front bezel. If you need to remove and replace only this front board, push the snap tabs out of way with a screwdriver and pull out the board. 7 Disconnect the autoprobe cable and backlight cable. Figure 5-39 8 Remove the two M3 screws, top right and bottom left, connecting the rear board of the keyboard assembly to the deck, and remove the board.
Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts Cal Connector (Power Button) Assembly 1 Remove the two screws connecting the cal bracket to the front deck. When replacing, use a power driver and T- 10 bit to torque the screws to 8 in- lbs. Figure 5-41 2 Remove the cal connector assembly from the front panel deck. Carefully pull the cables through the front deck. Replace individual parts as needed.
Chapter 5: Replacing Assemblies Removing and Replacing Front Panel Assembly Parts 3 Remove the four M3 screws (two on each side) connecting the display to the deck. When reinstalling, torque to 5 in- lbs. Figure 5-44 Attenuators (20, 25, and 33 GHz Models) 1 Remove the four screws connecting each attenuator to its bracket. When reconnecting, torque the screws to 8 in- lbs. 2 Remove the four attenuators by removing the nut of the attenuator from the threads of the 3.5 mm connector.
Chapter 5: Replacing Assemblies Removing and Replacing RealEdge Components Removing and Replacing RealEdge Components This section describes how to remove and replace the RealEdge modules and the attenuator components of the RealEdge assembly. 1 Remove the RealEdge assembly as described previously. 2 Remove the two screws from the back of the top RealEdge module as shown below. When replacing, torque to 5 in- lbs.
Chapter 5: Replacing Assemblies Removing and Replacing RealEdge Components 4 Carefully remove the RealEdge module. Figure 5-48 5 Remove the two screws on the side of the attenuator. When replacing, torque to 5 in- lbs. Figure 5-49 6 Loosen the SMA connector from the male SMA connector on the 1.85 connector. When replacing, torque the connector to 8 in- lbs. Figure 5-50 7 Remove the attenuator assembly.
Chapter 5: Replacing Assemblies Removing and Replacing RealEdge Components 8 Remove the two screws connecting the attenuator to the bracket. When replacing, hand tighten the screws and then back off the screw one full turn to allow the frame to move. Tighten the screws after the connector is tightened. Figure 5-51 9 Repeat these steps to remove and replace the bottom RealEdge module and attenuator.
Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly Removing and Replacing the Acquisition Boards/Backplane Assembly Use these procedures to remove and replace the acquisition and backplane assemblies and individual acquisition boards. When necessary, refer to other removal procedures. The graphics in this chapter are representative of the oscilloscope at the time of this printing. Your unit may look different.
Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly 5 Disconnect the cables from the rear panel (four cables for 33 GHz and lower models; six cables for 50 GHz and 62 GHz models), using 5/8 (left photo) and 5/16 (right photo) drivers. When reconnecting, torque the nut and washers to 18 in- lbs. Figure 5-54 6 If you need to replace the oscillator board, remove the four M3 screws connecting the board to its tray and disconnect all attached cables.
Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly 8 Remove the four M4 screws from the rear panel of the chassis. When replacing, torque the screws to 18 in- lbs. Figure 5-57 9 Dress all cables into the center to keep them from getting caught. 10 Lift the entire backplane board/acquisition assembly out of the chassis and place it on another table. Use the handles, as the assembly is heavy.
Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly Removing an Acquisition Board When removing an individual acquisition board, keep in mind that acquisition board 1 is next to the oscillator board and it has the longest cable. Acquisition board 4 has the shortest cable. You may want to label the acquisition boards 1 through 4 for easy reference. 1 Carefully remove the five clock cables from the DRO to the acquisition boards using a 5/16 Torx wrench.
Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly 3 Remove the 10 M4 screws (five from each side) connecting the acquisition boards to the rear panel. Keep the oscillator board tray connected to acquisition board 1 unless you have already removed it. When reassembling, torque the screws to 18 in- lbs using a T20 driver. Figure 5-61 4 Lift off the rear panel.
Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly 7 Remove the eight remaining screws securing the acquisition trays to the backplane tray. Remove each acquisition board starting with the lowest slot (next to the oscillator board). Figure 5-63 8 Gently rock the acquisition board and guide the input cables through. Remove the acquisition board and place it upside- down in an anti- static bag to avoid crimping the cables.
Chapter 5: Replacing Assemblies Removing and Replacing the Acquisition Boards/Backplane Assembly Removing the Backplane Board from the Deck 1 Loosen the five guide pins. When replacing, torque the guide pins to 5 in- lbs using a size 6 metric open- end wrench. Figure 5-65 2 Using a T10 Torx, remove the 10 tie- down screws from the edges. When replacing, torque the screws to 5 in- lbs. Figure 5-66 3 Lift the backplane assembly off the deck.
Chapter 5: Replacing Assemblies Setting the Calibration Factors after Replacing an Acquisition Board Setting the Calibration Factors after Replacing an Acquisition Board You must perform a user calibration and self test procedure after replacing an acquisition board. Refer to the calibration chapter in this Service Guide for details. Let the oscilloscope warm up before testing.
Chapter 5: Replacing Assemblies Removing and Replacing the Fans Removing and Replacing the Fans WARNING AVOID INJURY! The fan blades are exposed both inside and outside the chassis. Disconnect the power cable before working around the fan. Use extreme caution in working with the oscilloscope. Failure to observe these precautions may result in injury. 1 Disconnect the power cable and remove the top panel, power supply, front panel, bottom panel, and acquisition assembly as described earlier.
Chapter 5: Replacing Assemblies Removing and Replacing the Fans 4 Clip off the end of each of the fan mounts (see Figure 5- 69) and take the fan out. Repeat for each fan that needs to be replaced. Figure 5-69 CAUTION AVOID OVERHEATING THE OSCILLOSCOPE When replacing the fan, be sure the direction of the fan air flow is coming from the inside to the outside of the oscilloscope. Check the flow arrows on the fan and check for proper flow once power is applied to the oscilloscope.
Chapter 5: Replacing Assemblies Removing and Replacing the USB Controller Cable Removing and Replacing the USB Controller Cable 1 Remove the top panel. 2 Remove the two self- tapping screws from the top edge of chassis. When replacing, torque the screws to 3 in- lbs. Figure 5-70 3 Disconnect both ends of the cable.
Chapter 5: Replacing Assemblies Removing and Replacing the USB Controller Cable 4 Pull the connector cable out of the oscilloscope. Figure 5-72 5 To replace the USB controller cable, reverse the procedure. Be careful not to overtighten the screws.
Chapter 5: Replacing Assemblies Removing and Replacing the USB Controller Cable 106
6 Ordering Replaceable Parts 108 Listed Parts 108 Unlisted Parts 108 Direct Mail Order System 108 Exchange Assemblies 108 Exploded Views 109 Replaceable Parts List 114 Replaceable Parts
Replaceable Parts This chapter describes how to order replaceable assemblies and parts for the Agilent 90000 Q- Series oscilloscopes. Service support for this oscilloscope is replacement of parts to the assembly level. Ordering Replaceable Parts Listed Parts To order a part in the parts list, quote the Agilent Technologies part number, indicate the quantity desired, and address the order to the nearest Agilent Technologies Sales Office.
Chapter 6: Replaceable Parts Exploded Views Exploded Views Front Panel 109
Chapter 6: Replaceable Parts Exploded Views Fan and Acquisition Assembly 110
Chapter 6: Replaceable Parts Exploded Views Oscillator Assembly 111
Chapter 6: Replaceable Parts Exploded Views Power Supply and PC Motherboard 112
Chapter 6: Replaceable Parts Exploded Views External 113
Chapter 6: Replaceable Parts Replaceable Parts List Replaceable Parts List The following table is a list of replaceable parts. The information given for each part consists of the following: • Reference designation. • Agilent Technologies part number. • Total quantity (QTY) in oscilloscope or on assembly. The total quantity is given once and at the first appearance of the part number in the list. • Description of the part. Replaceable Parts Ref. Des.
Chapter 6: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des.
Chapter 6: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des.
Chapter 6: Replaceable Parts Replaceable Parts List Replaceable Parts Ref. Des.
Chapter 6: Replaceable Parts Replaceable Parts List 118
7 Motherboard Assembly 122 Acquisition Assembly 123 Backplane Assembly 125 Oscillator Assembly 129 Front Panel Assembly 130 RealEdge Technology Assembly Power Supply 133 132 Theory of Operation
Chapter 7: Theory of Operation Figure 7-1 Oscilloscope block diagram 120
Theory of Operation This chapter describes the basic structure of the oscilloscope and how the parts interact. The 90000 Q- Series oscilloscopes are comprised of five or six main assemblies, depending on the model of the oscilloscope: a motherboard assembly, an acquisition assembly, a backplane assembly, an oscillator assembly, and a front panel assembly for all models, plus a RealEdge Technology Assembly for 50 GHz and 62 GHz bandwidth models. Each oscilloscope also has a bulk power supply.
Chapter 7: Theory of Operation Motherboard Assembly Motherboard Assembly The motherboard assembly provides all system control and interface functions for the oscilloscope. The motherboard contains a microprocessor, a hard disk drive interface, ROM, RAM, keyboard and mouse interfaces, connections to the front panel assembly, and serial and parallel interfaces. Pressing the on/off button sends a signal to the motherboard.
Chapter 7: Theory of Operation Acquisition Assembly Acquisition Assembly The acquisition assembly consists of four identical acquisition boards. These four boards connect to the backplane board as shown in Figure 7- 3. Figure 7-3 Acquisition Assembly channel 4 channel 3 channel 2 channel 1 The bottom acquisition board circuitry samples, digitizes, and stores the signals for channel 1. The next higher acquisition board does the same for channel 2.
Chapter 7: Theory of Operation Acquisition Assembly Figure 7-4 Oak Module and Acquisition Components 7R 7ULJJHU RQ EDFNSODQH $'& 3RZHU DQG &RQWURO 0(0 &21 0HPRU\ 7ULJJHU &RD[ $WWHQXDWRU $'& 3UHDPS 0(0 &21 0HPRU\ 6DPSOHU 5HDO(GJH 7HFKQRORJ\ 3UHDPS $'& 0(0 &21 7ULJJHU 0HPRU\ 2DN 0RGXOH $'& &RD[ 'LIIHUHQWLDO 6LJQDO 7R 7ULJJHU RQ EDFNSODQH *+] &ORFN &RXSOHU 0(0 &21 0HPRU\ $FT )3*$ The acquisition front end (analog path) starts at the front panel input connectors, then goes through the
Chapter 7: Theory of Operation Backplane Assembly Backplane Assembly The backplane assembly is a device on the PCI Express (PCIe) bus connected by a PCI Express cable to the motherboard. The backplane assembly receives +12 V DC power through a power interface board from the bulk supply, and all voltages are derived from switching power regulators and other circuitry. Most of the switching and circuitry are on the backplane board, with some distribution and generation done on the acquisition boards.
Chapter 7: Theory of Operation Backplane Assembly Main FPGA The main FPGA (field- programmable gate array) is the only communication link from the oscilloscope hardware to the PC system. All system controls and data pass through the main FPGA. Figure 7- 6 shows the connections to the main FPGA Figure 7-6 Main Communication FPGA Connections.
Chapter 7: Theory of Operation Backplane Assembly Clock Distribution System Figure 7- 7 shows the timebase system including its circuitry.
Chapter 7: Theory of Operation Backplane Assembly The fundamental sample clock is a single- ended 10 GHz signal created by the timebase generation system. Multiple copies of this clock are created there and distributed to each Oak module and the timebase IC through semi- rigid coax cables. In each case, the single- ended signal is converted to a differential signal using a bandpass filtered 180° phase splitter implemented using microwave structures on shielded inner layers of the PCB.
Chapter 7: Theory of Operation Oscillator Assembly Oscillator Assembly The oscillator assembly consists of an oscillator board; one or two DROs (dielectric resonator oscillators), depending on the oscilloscope’s model; two SMA connectors for the 100 MHz clock; two BNC connectors for the 10 MHz clock; and a connector to the backplane board. The timebase distribution system described in the previous section is driven by a precision low- jitter 10 GHz clock generation system.
Chapter 7: Theory of Operation Front Panel Assembly Front Panel Assembly The front panel assembly consists of an LCD display board with backlight; a touch screen and touch controller; an on/off board; and a keyboard assembly, which is two boards that sit with one behind the other, connected with a pair of 60- pin board- toboard connectors. On/Off Board The on/off board interfaces with the motherboard to provide the on/off switch function, and with the backplane to provide the probe compensation output.
Chapter 7: Theory of Operation Front Panel Assembly 131
Chapter 7: Theory of Operation RealEdge Technology Assembly RealEdge Technology Assembly The RealEdge Technology assembly is included with Q- Series oscilloscope models of 50 GHz and 62 GHz (DSOX/DSAX95004Q and DSOX/DSAX96204Q). The RealEdge Technology assembly consists of a connector, a 67 GHz attenuator, three RealEdge Technology microcircuits, and a 32 GHz DRO. This Service Guide does not describe the RealEdge Technology assembly in any detail, as the technology is Agilent proprietary.
Chapter 7: Theory of Operation Power Supply Power Supply The power supply is a +12 V bulk supply that is removable, exchangeable, and safetyapproved. It transforms AC power to the main +12 V 100A supply and a small +5 V supply. The +5 V supply is standby power and is always on whenever AC power is applied. The +5 V supply is used only by supervisory circuits that monitor and control all other supplies.
Chapter 7: Theory of Operation Power Supply 134
Safety Notices This apparatus has been designed and tested in accordance with IEC Publication EN 61010-1:2001, Safety Requirements for Measuring Apparatus, and has been supplied in a safe condition. This is a Safety Class I instrument (provided with terminal for protective earthing). Before applying power, verify that the correct safety precautions are taken (see the following warnings). In addition, note the external markings on the instrument that are described under "Safety Symbols.
Notices © Agilent Technologies, Inc. 2013 No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies, Inc. as governed by United States and international copyright laws.
