Agilent Model 54835A/45A/46A Oscilloscopes
 Ease of use with high performance
Trigger setup controls set mode and basic parameters
Service Policy
Display shows waveforms and graphical user interface
 Power
Measurements
 This Book
 Contents
 To check the keyboard To check the LEDs
Contents
No Display Trouble Isolation
To remove and replace the backlight inverter board
 Replaceable Parts
To remove and replace the floppy disk drive
 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
 Required when using 2 or more Agilent 1144A active probes
Accessories available
Accessories available
Agilent 1144A MHz Active Probe
 Agilent
 Acquisition
Specifications & characteristics
Specifications & characteristics
 Specifications & characteristics Vertical
 Whichever is larger
Horizontal
Offset Accuracy
Post-trigger
 Specifications & characteristics Trigger
 Specifications & characteristics Display
Measurements
 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
 To verify basic oscilloscope operation
Press the Default Setup key on the front panel
Graphical Interface Enable Button
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
 Test Interval Dependencies
See Also
 Averaging
Let the Instrument Warm Up Before Testing
Clear Display
 To test the dc calibrator
Enable the graphical interface
Procedure
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
 Connect the equipment
Specification
To test voltage measurement accuracy
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
 To Set Vertical Scale and Position
Set the scale from the table Set the offset from the table
 To test offset accuracy
To test offset accuracy
Use the following table for steps 6 through
Volts/div Position Supply Tolerance Limits
 To test offset accuracy
 Real Time
Specification Equivalent Time
To test bandwidth
Equivalent Time Test
 Displayed. Note the Vamptd1 reading
Calculate the response using the formula
Select Vamptd from the Voltage submenu of the Measure menu
 Real Time Test
MΩ, 500 MHz Test on 54835A, 54845A, and 54846A
 To test time measurement accuracy
Equivalent Time Mode Procedure
To test time measurement accuracy
Equivalent Time ≥16 averages
 Horizontal Setup for Equivalent Time Procedure
Waveform for Time Measurement Accuracy Check
 Acquisition Setup for Equivalent Time Procedure
Source Selection for Delta Time Measurement
 Measurement Settings for Time Interval Measurement
For valid statistical data
 New Measurement Settings for Delta Time Measurement
 Real-Time Mode Procedure
Measurement Definitions for Real Mode Procedure
 Click Close
 Set horizontal time/div to 5 ns/div
Acquisition Setup for Trigger Sensitivity Test
To test trigger sensitivity
To test trigger sensitivity
 Setting the Markers for a 0.5 Division Reference
Turn on Channel 1 and turn off all other channels
 Procedure-Auxiliary Trigger Test
If a test fails
Page
 Amplitude Input Channel Chan 4/Ext Resistance
Agilent Technologies 54835A/45A/46A Oscilloscope
Test Limits Results Vmax Vmin/5 =
Voltage Scale Coupling Supply Limits Channel
 Channel 2 GSa/s
Realtime Channel 4 GSa/s
Channel 8 GSa/s
∆Time edge#101 Limits
 Calibrating and Adjusting
 Calibrating and Adjusting
 Let the Oscilloscope Warm Up Before Adjusting
Loading New Software
 To check the power supply
To check the power supply
Disconnect the oscilloscope power cord and remove the cover
Equipment Critical Specifications Recommended Model/Part
 Power Supply Voltage Limits
Supply Voltage Specification Limits
 Equipment Required
 To check the flat panel display FPD
Flat-Panel Display Specifications
When to Use this Procedure
To check the flat panel display FPD
 Click Start
Starting the Screen Test
 Repeat steps 6 and 7 for all colors
Screen Test
 Self calibration
To run the self calibration
To run the self calibration
Calibration time
 If calibration fails
Click Start, then follow the instructions on the screen
Clear Cal Memory Protect to Run self calibration
Click here to start calibration
Page
 Troubleshooting
 Troubleshooting
 To install the fan safety shield
To install the fan safety shield
Disconnect the instrument power cord and remove the cover
Installing the Fan Safety Shield
 To troubleshoot the instrument
To troubleshoot the instrument
 Primary Trouble Isolation Flowchart
Primary Trouble Isolation
 Primary Trouble Isolation
Perform power-up
Power-on Display Default Graphical Interface Disabled
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
 Check the fan connections
Remove the cabinet and install the fan safety shield
No Display Trouble Isolation
Sequence
 Completed its power-on test LEDs do not come on,
Power-on
Power supply indicator Isolation flowchart
Configure the motherboard
 Not, the problem may be with
Power to the instrument.
Solenoids are preset Normal operating pattern
Board video signals
 Power Supply Trouble Isolation Flowchart
 Power Supply Trouble Isolation
Power Supply Trouble Isolation
Check the power supply voltages
Approximate Resistance Values, Each Power Supply to Ground
 Power Supply Distribution
Replace any shorted assembly
Override the Remote Inhibit signal
Power-up Sense Resistor Connection
 Check +15 V Bias and Remote Inhibit cabling
Replace the power supply
Routing of +15 V Bias and Remote Inhibit Signals
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
 To check the keyboard
When you are finished, click Close
Test Procedure
To check the keyboard
 Troubleshooting Procedure
Re-assemble the instrument
 Test by Rows
To check the LEDs
To check the LEDs
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
 Signal
To check the Svga display board video signals
To check the Svga display board video signals
Video Signals
 Backlight Inverter Board Input Voltages Input Pin #
To check the backlight inverter voltages
To check the backlight inverter voltages
Backlight OFF Backlight on
 Post Code Listing
Post Code Listing AMI Motherboard only
Post Code Listing AMI Motherboard only
Checkpoint Code Description
 Color settings next
Keyboard BAT command is issued
Unblocking command
Next
 Display memory read/write test next
Clearing the memory below 1 MB for the soft reset next
2Eh
2Fh
 Winbios Setup next
Keyboard reset command next
Command next
After Winbios Setup next
 9Ch
9Bh
Coprocessor text next
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
 Agilent Technologies Service Note Describes Upgrade Details
To configure the motherboard jumpers and set up the Bios
 J37, J39
Configuring the AMI Series 727 Motherboard Jumpers
J46
Series 727 Motherboard Jumpers
 J25J24 J37
MHz Clock Is Required
J2J21 J11 J12
 Press F1 to run the Winbios setup
To configure the AMI Series 727 Winbios Parameters
 System Keyboard Absent
Do the following within the setup program
Winbios Keyboard Commands
Do steps h-l only if Your System has 64 Mb RAM
 Load Optimal Defaults
Exit the Setup program, saving the changes you made
Configuration Item Setting
Primary
 Configuring the AMI Series 757 Motherboard for 200 MHz CPU
Series 757 Rev C Motherboard Jumpers
 Pin
 Do not Press F2
 When to Do this Procedure
 Series 757 System Bios Settings with 1.44 Mbyte floppy drive
 Configuring the AMI Series 757 Motherboard for 300 MHz CPU
Series 757 Rev D Motherboard Jumpers
 J14 J16
 AMI Atlas-III PCI/ISA
 Do the following within the setup program
 Series 757 System Bios Settings with 120 Mbyte floppy drive
 Off
FIC VA-503A Motherboard
Core S1-1 S1-2 S1-3 S1-4
Ratio S2-1 S2-2
 Under the Power Management Setup, change these settings
Under the PnP/PCI Configuration, change these settings
 To troubleshoot the acquisition system
Under Integrated Peripherals, change these settings
Isolating Acquisition Problems
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
 Probe Board failed
Temperature Sense failed
Fiso failed
Offset DAC failed
 Interpolator failed
Scroll Mode Counter failed
Timer 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
 Select About Infiniium... from the Help Menu
Enable the Graphical Interface
Software Revisions
Software Revisions
Page
 Replacing Assemblies
 Replacing Assemblies
 Remove all accessories from the instrument
To return the instrument to Agilent Technologies for service
 Cover Fasteners
To remove and replace the cover
To remove and replace the cover
 To disconnect the cable
To disconnect and connect Mylar flex cables
To disconnect and connect Mylar flex cables
To reconnect the cable
 To remove and replace the AutoProbe assembly
To remove and replace the AutoProbe assembly
Disconnect the power cable and remove the cover
Disconnecting W13
 Avoid Damage to the Ribbon Cable and Faceplate
Pushing Out the AutoProbe Faceplate
 Removing the Probe Power and Control Assembly
To remove and replace the probe power and control assembly
To remove and replace 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
 Disconnecting W16, W20, and the Backlight Cables
Front Panel Side Screws
 Keep Long Screws Separate for Re-assembly
Front Panel Cover Plate Screws
 Removing the Cursor Keyboard
Removing the backlights
 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
 Disconnect these cables from the Svga display board
Removing the Scope Interface and Svga Display Boards
 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 floppy disk drive
To remove and replace the floppy disk drive
To remove and replace the motherboard
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
 Removing and replacing SIMMs on the AMI motherboard
To remove and replace RAM SIMMs or Sdram DIMMs
To remove and replace RAM SIMMs or Sdram DIMMs
Removing RAM SIMMs
 Do Not Remove the Attenuators from the Acquisition Board
To remove and replace an attenuator
To remove and replace an attenuator
 If You Permanently Replace Parts
Removing an Attenuator
 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
 To replace the acquisition hybrid
Do not USE Excessive Force
 Hybrid Connector
Removing the Hybrid Connector
 Replaceable Parts
 Unlisted Parts
Ordering Replaceable Parts
Listed 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
 MP61 MP17 MP62 or MP63 MP15 and MP49
Exploded Views
Exploded Views
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
 MP12
Sleeve and Accessory Pouch
MP14 MP52 MP70 MP72
H10 MP20 MP13 H19 H26 MP19
 Attenuator Assembly
 Replaceable Parts List
Replaceable Parts List
 Agilent Part Des Number
QTY
 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
 Disk Drives
Acquisition System
Front Panel
Attenuators
 Gpib Interface Card
Probe Power and Control
Svga Display Card
 Acquisition Block Diagram
 Attenuator Theory
Attenuator Theory
Acquisition Theory
Acquisition Board
 Acquisition Theory
 Acquisition Modes
Scope Interface Board
Page
 Supplementary Information
Manufacturer’s Name
Manufacturer’s Address
 Product Regulations
 Restricted Rights Legend
 Product Warranty