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