Agilent Model 54835A/45A/46A Oscilloscopes
 Service Policy
Trigger setup controls set mode and basic parameters
Ease of use with high performance
Display shows waveforms and graphical user interface
 Measurements
Power
 This Book
 Contents
 No Display Trouble Isolation
Contents
To check the keyboard To check the LEDs
To remove and replace the backlight inverter board
 To remove and replace the floppy disk drive
Replaceable Parts
 General Information
 Model Description
Instruments covered by this service guide
Oscilloscopes Covered by this Service Guide
 Accessories supplied
Accessories supplied
 Option Number Description
Options available
Options available
 Accessories available
Accessories available
Required when using 2 or more Agilent 1144A active probes
Agilent 1144A MHz Active Probe
 Agilent
 Acquisition
Specifications & characteristics
Specifications & characteristics
 Specifications & characteristics Vertical
 Offset Accuracy
Horizontal
Whichever is larger
Post-trigger
 Specifications & characteristics Trigger
 Measurements
Specifications & characteristics Display
 Computer System/ Storage
 Rise Time figures are calculated from tr=.35/Bandwidth
CAT I and CAT II Definitions
Video Output
 General Characteristics
Agilent Technologies 54835A/45A/46A general characteristics
Agilent Technologies 54835A/45A/46A general characteristics
 Agilent Technologies 54835A/45A/46A general characteristics
 Recommended test equipment
Agilent Service software No substitution
Recommended test equipment
Agilent EPM Sensor 441A/Agilent 8482A
 Preparing for Use
 Preparing for Use
 To inspect the instrument
To inspect the instrument
 Three-wire Power Cable is Provided
To connect power
To connect power
 To connect the mouse or other pointing device
To connect the mouse or other pointing device
To attach the optional trackball
 To attach the optional trackball
 To connect the keyboard
To connect the keyboard
To connect to the LAN card
 To connect oscilloscope probes
To connect oscilloscope probes
 To connect a printer
To connect a printer
 To connect an external monitor
To connect an external monitor
To connect the Gpib cable
 To tilt the oscilloscope upward for easier viewing
To tilt the oscilloscope upward for easier viewing
 You Can Configure the Backlight Saver
To power on the oscilloscope
To power on the oscilloscope
 Graphical Interface Enable Button
Press the Default Setup key on the front panel
To verify basic oscilloscope operation
Press the Autoscale key on the front panel
 To clean the instrument
To clean the instrument
To clean the display monitor contrast filter
 Testing Performance
 See Also
Test Interval Dependencies
 Averaging
Let the Instrument Warm Up Before Testing
Clear Display
 Procedure
Enable the graphical interface
To test the dc calibrator
Connect the multimeter to the front panel Aux Out BNC
 Selecting DC in the Calibration Dialog
If the test fails
Set Aux Output to DC Set the output voltage
 To test input resistance
Input Resistance Equipment Setup
To test input resistance
25% accuracy Cables
 To test voltage measurement accuracy
Specification
Connect the equipment
To test voltage measurement accuracy
 Use the following table for steps 8 through
Voltage Measurement Accuracy Equipment Setup
Acquisition Setup for Voltage Accuracy Measurement
 Source Selection for Vavg Measurement
Scale Offset Supply Tolerance Limits
Select Channel 1 as the source for the Vavg measurement
 Set the scale from the table Set the offset from the table
To Set Vertical Scale and Position
 Use the following table for steps 6 through
To test offset accuracy
To test offset accuracy
Volts/div Position Supply Tolerance Limits
 To test offset accuracy
 To test bandwidth
Specification Equivalent Time
Real Time
Equivalent Time Test
 Displayed. Note the Vamptd1 reading
Calculate the response using the formula
Select Vamptd from the Voltage submenu of the Measure menu
 MΩ, 500 MHz Test on 54835A, 54845A, and 54846A
Real Time Test
 To test time measurement accuracy
Equivalent Time Mode Procedure
To test time measurement accuracy
Equivalent Time ≥16 averages
 Waveform for Time Measurement Accuracy Check
Horizontal Setup for Equivalent Time Procedure
 Source Selection for Delta Time Measurement
Acquisition Setup for Equivalent Time Procedure
 For valid statistical data
Measurement Settings for Time Interval Measurement
 New Measurement Settings for Delta Time Measurement
 Measurement Definitions for Real Mode Procedure
Real-Time Mode Procedure
 Click Close
 To test trigger sensitivity
Acquisition Setup for Trigger Sensitivity Test
Set horizontal time/div to 5 ns/div
To test trigger sensitivity
 Turn on Channel 1 and turn off all other channels
Setting the Markers for a 0.5 Division Reference
 If a test fails
Procedure-Auxiliary Trigger Test
Page
 Test Limits Results Vmax Vmin/5 =
Agilent Technologies 54835A/45A/46A Oscilloscope
Amplitude Input Channel Chan 4/Ext Resistance
Voltage Scale Coupling Supply Limits Channel
 Channel 8 GSa/s
Realtime Channel 4 GSa/s
Channel 2 GSa/s
∆Time edge#101 Limits
 Calibrating and Adjusting
 Calibrating and Adjusting
 Loading New Software
Let the Oscilloscope Warm Up Before Adjusting
 Disconnect the oscilloscope power cord and remove the cover
To check the power supply
To check the power supply
Equipment Critical Specifications Recommended Model/Part
 Supply Voltage Specification Limits
Power Supply Voltage Limits
 Equipment Required
 When to Use this Procedure
Flat-Panel Display Specifications
To check the flat panel display FPD
To check the flat panel display FPD
 Starting the Screen Test
Click Start
 Screen Test
Repeat steps 6 and 7 for all colors
 To run the self calibration
To run the self calibration
Self calibration
Calibration time
 Clear Cal Memory Protect to Run self calibration
Click Start, then follow the instructions on the screen
If calibration fails
Click here to start calibration
Page
 Troubleshooting
 Troubleshooting
 Disconnect the instrument power cord and remove the cover
To install the fan safety shield
To install the fan safety shield
Installing the Fan Safety Shield
 To troubleshoot the instrument
To troubleshoot the instrument
 Primary Trouble Isolation
Primary Trouble Isolation Flowchart
 Power-on Display Default Graphical Interface Disabled
Perform power-up
Primary Trouble Isolation
Check the display
 Run the Knob and Key selftest and the LED selftest
Run oscilloscope self-tests
Check the front panel
 No Display Trouble Isolation Flowchart
 No Display Trouble Isolation
Remove the cabinet and install the fan safety shield
Check the fan connections
Sequence
 Power supply indicator Isolation flowchart
Power-on
Completed its power-on test LEDs do not come on,
Configure the motherboard
 Solenoids are preset Normal operating pattern
Power to the instrument.
Not, the problem may be with
Board video signals
 Power Supply Trouble Isolation Flowchart
 Check the power supply voltages
Power Supply Trouble Isolation
Power Supply Trouble Isolation
Approximate Resistance Values, Each Power Supply to Ground
 Override the Remote Inhibit signal
Replace any shorted assembly
Power Supply Distribution
Power-up Sense Resistor Connection
 Routing of +15 V Bias and Remote Inhibit Signals
Replace the power supply
Check +15 V Bias and Remote Inhibit cabling
Check for the oscilloscope display onscreen
 Pin Supply +3V Offset Data Probe ID Ring Clk +12
To check probe power outputs
To check probe power outputs
 Test Procedure
When you are finished, click Close
To check the keyboard
To check the keyboard
 Re-assemble the instrument
Troubleshooting Procedure
 To check the LEDs
To check the LEDs
Test by Rows
LED Test Screen
 When you are finished, click Close
 Messages Vary Slightly
To check the motherboard, CPU, and RAM
To check the motherboard, CPU, and RAM
 To check the Svga display board video signals
To check the Svga display board video signals
Signal
Video Signals
 To check the backlight inverter voltages
To check the backlight inverter voltages
Backlight Inverter Board Input Voltages Input Pin #
Backlight OFF Backlight on
 Post Code Listing AMI Motherboard only
Post Code Listing AMI Motherboard only
Post Code Listing
Checkpoint Code Description
 Unblocking command
Keyboard BAT command is issued
Color settings next
Next
 2Eh
Clearing the memory below 1 MB for the soft reset next
Display memory read/write test next
2Fh
 Command next
Keyboard reset command next
Winbios Setup next
After Winbios Setup next
 Coprocessor text next
9Bh
9Ch
9Dh
 Motherboard / floppy drive configurations Bios setup
To configure the motherboard jumpers and set up the Bios
To configure the motherboard jumpers and set up the Bios
 To configure the motherboard jumpers and set up the Bios
 To configure the motherboard jumpers and set up the Bios
Agilent Technologies Service Note Describes Upgrade Details
 J46
Configuring the AMI Series 727 Motherboard Jumpers
J37, J39
Series 727 Motherboard Jumpers
 J25J24 J37
MHz Clock Is Required
J2J21 J11 J12
 To configure the AMI Series 727 Winbios Parameters
Press F1 to run the Winbios setup
 Winbios Keyboard Commands
Do the following within the setup program
System Keyboard Absent
Do steps h-l only if Your System has 64 Mb RAM
 Configuration Item Setting
Exit the Setup program, saving the changes you made
Load Optimal Defaults
Primary
 Series 757 Rev C Motherboard Jumpers
Configuring the AMI Series 757 Motherboard for 200 MHz CPU
 Pin
 Do not Press F2
 When to Do this Procedure
 Series 757 System Bios Settings with 1.44 Mbyte floppy drive
 Series 757 Rev D Motherboard Jumpers
Configuring the AMI Series 757 Motherboard for 300 MHz CPU
 J14 J16
 AMI Atlas-III PCI/ISA
 Do the following within the setup program
 Series 757 System Bios Settings with 120 Mbyte floppy drive
 Core S1-1 S1-2 S1-3 S1-4
FIC VA-503A Motherboard
Off
Ratio S2-1 S2-2
 Under the PnP/PCI Configuration, change these settings
Under the Power Management Setup, change these settings
 Isolating Acquisition Problems
Under Integrated Peripherals, change these settings
To troubleshoot the acquisition system
To troubleshoot the acquisition system
 Acquisition Trouble Isolation 1
 Acquisition Trouble Isolation 2
 Acquisition Trouble Isolation 3
 Acquisition Trouble Isolation 4
To D Converter Failed
Return the Known Good Attenuator to Original Channel
 Fiso failed
Temperature Sense failed
Probe Board failed
Offset DAC failed
 Timer failed
Scroll Mode Counter failed
Interpolator failed
Timebase failed
 Attenuator Click Test
To troubleshoot attenuator failures
To troubleshoot attenuator failures
 Attenuator Connectivity Test
Repeat steps 1 through 3 for the remaining input channels
Swapping Attenuators
 Attenuator Assembly Troubleshooting
 Software Revisions
Enable the Graphical Interface
Select About Infiniium... from the Help Menu
Software Revisions
Page
 Replacing Assemblies
 Replacing Assemblies
 To return the instrument to Agilent Technologies for service
Remove all accessories from the instrument
 Cover Fasteners
To remove and replace the cover
To remove and replace the cover
 To disconnect and connect Mylar flex cables
To disconnect and connect Mylar flex cables
To disconnect the cable
To reconnect the cable
 Disconnect the power cable and remove the cover
To remove and replace the AutoProbe assembly
To remove and replace the AutoProbe assembly
Disconnecting W13
 Pushing Out the AutoProbe Faceplate
Avoid Damage to the Ribbon Cable and Faceplate
 To remove and replace the probe power and control assembly
To remove and replace the probe power and control assembly
Removing the Probe Power and Control Assembly
Avoid Interference with the Fan
 To remove and replace the backlight inverter board
To remove and replace the front panel assembly
To remove and replace the backlight inverter board
Removing the Backlight Inverter Board
 Removing the BNC Nuts
To remove and replace the front panel assembly
SMB Cable W18 and Comp Wire W19
 Front Panel Side Screws
Disconnecting W16, W20, and the Backlight Cables
 Front Panel Cover Plate Screws
Keep Long Screws Separate for Re-assembly
 Removing the backlights
Removing the Cursor Keyboard
 Removing the Acquisition Assembly
To remove and replace the acquisition board assembly
To remove and replace the acquisition board assembly
 To remove and replace the LAN interface board
To replace the board, reverse the removal procedure
To remove and replace the LAN interface board
Removing the LAN Interface Board
 Removing the Gpib Interface Board
To remove and replace the Gpib interface board
To remove and replace the Gpib interface board
 Removing the Scope Interface and Svga Display Boards
Disconnect these cables from the Svga display board
 To separate the scope interface board and Svga display board
To separate the scope interface board and Svga display board
 To remove and replace the Option 200 sound card
To replace the card, reverse the removal procedure
To remove and replace the Option 200 sound card
 Removing the Hard Disk Drive
To remove and replace the hard disk drive
To remove and replace the hard disk drive
 To remove and replace the motherboard
To remove and replace the floppy disk drive
To remove and replace the floppy disk drive
Removing the Floppy Disk Drive Screws
 Removing the Motherboard Torx Screws
Disconnect these cables from the motherboard
To remove and replace the motherboard
 To remove and replace the motherboard
 Removing Power Supply Cables
To remove and replace the power supply
To remove and replace the power supply
 To remove and replace the fan
To install the fan, reverse this procedure
To remove and replace the fan
Removing Fan Fasteners
 Removing the CPU
To remove and replace the CPU
To remove and replace the CPU
 To remove and replace RAM SIMMs or Sdram DIMMs
To remove and replace RAM SIMMs or Sdram DIMMs
Removing and replacing SIMMs on the AMI motherboard
Removing RAM SIMMs
 Do Not Remove the Attenuators from the Acquisition Board
To remove and replace an attenuator
To remove and replace an attenuator
 Removing an Attenuator
If You Permanently Replace Parts
 Self Test
To reset the attenuator contact counter
To reset the attenuator contact counter
 Repeat for each channel you need to change
Attenuator Relay Actuations Setup
Attenuator Channel box, select the channel you are changing
 To remove the acquisition hybrid
To remove and replace an acquisition hybrid
To remove and replace an acquisition hybrid
 Do not USE Excessive Force
To replace the acquisition hybrid
 Removing the Hybrid Connector
Hybrid Connector
 Replaceable Parts
 Listed Parts
Ordering Replaceable Parts
Unlisted Parts
Direct Mail Order System
 Plug Type Cable Plug Description Length Color Country In/cm
Power Cables and Plug Configurations
Power Cables and Plug Configurations
 Exploded Views
Exploded Views
MP61 MP17 MP62 or MP63 MP15 and MP49
Front Frame and Front Panel
 Fan and Acquisition Assembly
 H12 H24 H25 MP55 MP60 H11
Power Supply and PC Motherboard
A10 MP57
 Exploded Views
 A4A1W24/25 A4A4
 Exploded Views
 Exploded Views
 H23 A4A2
FIC VA-503A Motherboard for PC Motherboard Configuration
W17W20 A15 W14 W11 A19 W16 A14 W24/25 W27 W22 A4A1
 Exploded Views
 MP14 MP52 MP70 MP72
Sleeve and Accessory Pouch
MP12
H10 MP20 MP13 H19 H26 MP19
 Attenuator Assembly
 Replaceable Parts List
Replaceable Parts List
 QTY
Agilent Part Des Number
 DRAM-SIMM 2MX32 8 MB Simm
 DRAM-DIMM 16MX32 64 MB Dimm
 Fans
 Cables
 Display BD. Jumper
Page
 Theory of Operation
 Theory of Operation
 Block-Level Theory
Power Supply Assembly
FPD Monitor Assembly
 Front Panel
Acquisition System
Disk Drives
Attenuators
 Gpib Interface Card
Probe Power and Control
Svga Display Card
 Acquisition Block Diagram
 Acquisition Theory
Attenuator Theory
Attenuator Theory
Acquisition Board
 Acquisition Theory
 Scope Interface Board
Acquisition Modes
Page
 Supplementary Information
Manufacturer’s Name
Manufacturer’s Address
 Product Regulations
 Restricted Rights Legend
 Product Warranty