Agilent Model 54835A/45A/46A Oscilloscopes
Service Guide
Service Policy
Trigger setup controls set mode and basic parameters
Glance
Ease of use with high performance
Trigger Setup Auxiliary Trigger Input
Power
Display and Graphical Interface
Horizontal
In This Book
Contents 1 General Information
Contents
3 Testing Performance
4 Calibrating and Adjusting
6 Replacing Assemblies
5 Troubleshooting
8 Theory of Operation
7 Replaceable Parts
General Information
Instruments covered by this service guide
General Information
Oscilloscopes Covered by this Service Guide
Accessories supplied
Accessories supplied
Users Quick Start Guide
Programmer’s Guide and Programmer’s Quick Reference
Options available
Options available
Accessories available
Accessories available
Chapter 1 General Information
Service Kit includes service software and fan safety shield
Accessories available
Fan Safety Shield clips onto side of chassis with cover removed
Chapter 1 General Information
Specifications & characteristics
Specifications & characteristics
Chapter 1 General Information
Acquisition
Agilent 54835A - 500 MHz 4-channel mode
Specifications & characteristics Vertical
Agilent 54845A - 1.5 GHz 2-channel mode
Agilent 54845A - 1.0 GHz 4-channel mode
Chapter 1 General Information
Specifications & characteristics
Horizontal
0 to -1 s or one full screen width
Chapter 1 General Information
Specifications & characteristics Trigger
Specifications & characteristics Display
Chapter 1 General Information
Measurements
Specifications & characteristics FFT
Chapter 1 General Information
Computer System/ Storage
Chapter 1 General Information
Specifications & characteristics
CAT I and CAT II Definitions
1-13
Agilent Technologies 54835A/45A/46A general characteristics
Agilent Technologies 54835A/45A/46A general characteristics
General Characteristics
Chapter 1 General Information
Chapter 1 General Information
Agilent Technologies 54835A/45A/46A general characteristics
Chapter 1 General Information
Recommended test equipment
Recommended test equipment
Recommended Test Equipment
Preparing for Use
Preparing for Use
To inspect the instrument
Setting Up the Oscilloscope
To inspect the instrument
To connect power
To connect power
A 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
3 Press the Default Setup key on the front panel
To verify basic oscilloscope operation
1 Connect an oscilloscope probe to channel
4 Press the Autoscale key on the front panel
To clean the display monitor contrast filter
To clean the instrument
To clean the instrument
Chapter 2 Preparing for Use
Testing Performance
Specifications
To test the dc calibrator
Testing Interval
Testing Performance
Equipment Required
Self-Test Verification
Performance Test Procedures
Specifications
Test Record
Operating Hints
2 Enable the graphical interface
To test the dc calibrator
3 Press Default Setup to set the oscilloscope to default conditions
1 Connect the multimeter to the front panel Aux Out BNC
9 The DVM should read near -2.500 V. Record the reading. V2 =
To test input resistance
1 Connect the equipment
To test voltage measurement accuracy
To test voltage measurement accuracy
Equipment Required
2 Press Default Setup to set the oscilloscope to default conditions
9 Select Channel 1 from the Setup menu
16 With the channel keys, set the active channel OFF and the next ON
2 Press Default Setup to set the oscilloscope to default conditions
To test offset accuracy
3 Select Acquisition from the Setup menu
6 Select Channel 1 from the Setup menu
11 Repeat steps 6 through 10 for the other lines in the table
Specification Equivalent Time
To test bandwidth
To test bandwidth
Real Time
= 20log
response dB
487 mV
= 20log 10 0.871 = -1.19dB
20 Select Acquisition from the Setup menu
To test time measurement accuracy
10 Select Acquisition from the Setup menu
Source Selection for Delta Time Measurement
Acquisition Setup for Equivalent Time Procedure
16 Change the signal generator frequency to 100 MHz 10 ns period
New Measurement Settings for Delta Time Measurement
2 Select Acquisition from the Setup menu
7 Clear measurements
1 Press Default Setup 2 Select Acquisition from the Setup menu
To test trigger sensitivity
Chapter 3 Testing Performance
4 Set horizontal time/div to 5 ns/div
5 Turn on Channel 1 and turn off all other channels
17 Adjust the horizontal sweep speed to 1 ns/div
Page
Performance Test Record
Agilent Technologies
Agilent 54845A/46A 395 ns ± 53 ps
394.922 to 395.078 ns
394.947 to 395.053 ns
300 mVpp at 500 MHz
To check the power supply
Calibrating and Adjusting
Equipment Required
Operating Hints
Self Calibration Interval and Hardware Adjustments
Calibrating and Adjusting
Mainframe Cal Factor Memory Error
Equipment Required
Calibration Procedures
Loading Default Oscilloscope Settings
Loading New Software
Chapter 4 Calibrating and Adjusting
Chapter 4 Calibrating and Adjusting
To check the power supply
To check the power supply
Refer to the following figure for testpoint locations
Connect the common lead of the voltmeter to the GND test point
To check the 715 Hz auxiliary output probe compensation squarewave
Chapter 4 Calibrating and Adjusting
To check the flat panel display FPD
Flat-Panel Display Specifications
When to Use this Procedure
Chapter 4 Calibrating and Adjusting
5 Click Start
To check the flat panel display FPD
6 Select a color by clicking the radio button for that color
8 Repeat steps 6 and 7 for all colors
To check the flat panel display FPD
To run the self calibration
To run the self calibration
Equipment Required
Let the Oscilloscope Warm Up Before Running the Self Calibration
To run the self calibration
4 Click Start, then follow the instructions on the screen
Clear Cal Memory Protect to Run self calibration
If calibration fails
Page
Troubleshooting
Safety
Troubleshooting
ESD Precautions
Tools Required
Default Setup
To install the fan safety shield
To troubleshoot the instrument
To troubleshoot the instrument
Troubleshooting
Chapter 5 Troubleshooting
Troubleshooting
To troubleshoot the instrument
A Perform power-up
Primary Trouble Isolation
B Check the display
Primary Trouble Isolation
D Check the front panel
C Run oscilloscope self-tests
E Run the Knob and Key selftest and the LED selftest
Primary Trouble Isolation
No Display Trouble Isolation Chart
Chapter 5 Troubleshooting
Check fan connections and power-on
Power-up
A Remove the cabinet and install the fan safety shield
No Display Trouble Isolation
B Check the fan connections
sequence
Power-On Sequence with External Monitor Connected
Chapter 5 Troubleshooting
Power-on
No Display Trouble Isolation
Chapter 5 Troubleshooting
No Display Trouble Isolation
POST memory test message
Chapter 5 Troubleshooting
Power Supply Trouble Isolation Flowchart
No Display Trouble Isolation
A Check the power supply voltages
Power Supply Trouble Isolation
Power Supply Trouble Isolation
Power Supply Voltage Limits
D Override the Remote Inhibit signal
C Replace any shorted assembly
Power Supply Trouble Isolation
Reconnect Assemblies and Cables
Power Supply Trouble Isolation
F Replace the power supply
E Check +15 V Bias and Remote Inhibit cabling
G Check for the oscilloscope display onscreen
To check probe power outputs
To check probe power outputs
To check the keyboard
To check the keyboard
1 Disconnect the power cord and remove the cover
To check the LEDs
To check the LEDs
Test by Rows
To check the LEDs
5 When you are finished, click Close
To check the motherboard, CPU, and RAM
To check the SVGA display board video signals
To check the SVGA display board video signals
To check the backlight inverter voltages
To check the backlight inverter voltages
Chapter 5 Troubleshooting
POST Code Listing AMI Motherboard only
POST Code Listing AMI Motherboard only
POST Code Listing
Chapter 5 Troubleshooting
POST Code Listing AMI Motherboard only
Uncompressed Initialization Codes
Chapter 5 Troubleshooting
POST Code Listing AMI Motherboard only
Completed post-video ROM test processing. If the EGA/VGA controller is not found, performing
Chapter 5 Troubleshooting
POST Code Listing AMI Motherboard only
The memory size was adjusting for relocation and shadowing. Clearing the Hit message next
Chapter 5 Troubleshooting
POST Code Listing AMI Motherboard only
Required initialization before the Coprocessor test is over. Initializing the Coprocessor next
To configure the motherboard jumpers and set up the BIOS
To configure the motherboard jumpers and set up the BIOS
5-30
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
Chapter 5 Troubleshooting
Configuring the AMI Series 727 Motherboard Jumpers
Series 727 Motherboard Jumpers
fan will cause the CPU to overheat and malfunction
AVOID DAMAGE TO THE CPU BY CORRECTLY CONFIGURING THE JUMPERS
A 100-MHz Clock Is Required
5-33
5 Press F1 to run the WINBIOS setup
1 Connect the power cable to the oscilloscope
To configure the motherboard jumpers and set up the BIOS
To configure the AMI Series 727 WINBIOS Parameters
WINBIOS Keyboard Commands
6 Do the following within the setup program
System Keyboard Absent
Do steps h-l ONLY if Your System has 64 Mb RAM
Chapter 5 Troubleshooting
7 Exit the Setup program, saving the changes you made
To configure the motherboard jumpers and set up the BIOS
Series 727 System Configuration Settings
Configuring the AMI Series 757 Motherboard for 200 MHz CPU
Chapter 5 Troubleshooting
VRM Connector
J5, J6, J7, J8
To configure the jumpers, set J5, J6, J7, J8, and J14 as shown in the following figure. Note that the pairs of pins on J6 and J7 are shorted the pairs of pins on J5 and J8 are open and all pins on J14 are open
XXXXXX KB OK WAIT INS Pressed RUN SETUP Press F1 to Run SETUP
AMI Atlas-III PCI/ISA BIOS Release AMD-K6tm-/200 Checking NVRAM
Press F2 to load default values and continue
Messages Vary Slightly
To configure the motherboard jumpers and set up the BIOS
6 Do the following within the setup program
WINBIOS Keyboard Commands
When to Do this Procedure
To configure the motherboard jumpers and set up the BIOS
c Exit the BIOS Setup and save the changes you made
Series 757 System BIOS Settings with 1.44 Mbyte floppy drive
To configure the motherboard jumpers and set up the BIOS
Chapter 5 Troubleshooting
Configuring the AMI Series 757 Motherboard for 300 MHz CPU
Series 757 Rev D Motherboard Jumpers
The jumpers you must check are J5, J6, J7, J8, J14, J15 and J16. You must also install a 2.2
5 Press F1 to run the WINBIOS setup
1 Connect the power cable to the oscilloscope
To configure the motherboard jumpers and set up the BIOS
3 Connect an external keyboard and a mouse to the oscilloscope
WINBIOS Keyboard Commands
c Under Standard Setup, select Floppy A. Select Not Installed. Exit the Floppy A block. d Under Standard Setup, select Floppy B. Select Not Installed. Exit the Floppy B block
System Keyboard Absent
Series 757 System BIOS Settings with 120 Mbyte floppy drive
To configure the motherboard jumpers and set up the BIOS
To configure the motherboard jumpers and set up the BIOS
1 Set the PWR Power supply type select jumper to
To Configure the FIC Series VA-503A Motherboard BIOS Parameters
Use this procedure to set the FIC VA-503A motherboard BIOS
5-48
To troubleshoot the acquisition system
To troubleshoot the acquisition system
Chapter 5 Troubleshooting
To troubleshoot the acquisition system
Acquisition Trouble Isolation 1 of
Chapter 5 Troubleshooting
To troubleshoot the acquisition system
Acquisition Trouble Isolation 2 of
Chapter 5 Troubleshooting
To troubleshoot the acquisition system
Acquisition Trouble Isolation 3 of
A A to D Converter Failed
To troubleshoot the acquisition system
Return the Known Good Attenuator to Original Channel
B FISO failed
E Temperature Sense failed
C Probe Board failed
D Offset DAC failed
K Interpolator failed
To troubleshoot attenuator failures
To troubleshoot attenuator failures
4 Repeat steps 1 through 3 for the remaining input channels
2 Press the Default Setup key, then the Autoscale key
To troubleshoot attenuator failures
Swapping Attenuators
To troubleshoot attenuator failures
Chapter 5 Troubleshooting
Enable the Graphical Interface
Software Revisions
Select About Infiniium... from the Help Menu
Software Revisions
Page
Replacing Assemblies
Replacing Assemblies
ESD Precautions
Tools Required
2 Remove all accessories from the instrument
To return the instrument to Agilent Technologies for service
3 Protect the instrument by wrapping it in plastic or heavy paper
5 Seal the shipping container securely
To remove and replace the cover
To disconnect and connect Mylar flex cables
To remove and replace the AutoProbe assembly
1 Disconnect the power cable and remove the cover
To remove and replace the AutoProbe assembly
3 To replace the AutoProbe assembly, reverse the above procedure
To remove and replace the AutoProbe assembly
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
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
6-10
To remove and replace the front panel assembly
9 To replace the front panel assembly, reverse the above procedure
To remove and replace the keyboard and flat-panel display assemblies
Keep Long Screws Separate for Re-assembly
To remove and replace the keyboard and flat-panel display assemblies
PREVENT GLASS BREAKAGE
prevent cleaner from corroding FPD connections
6-13
To remove and replace the keyboard and flat-panel display assemblies
To remove and replace the acquisition board assembly
To remove and replace the acquisition board assembly
To remove and replace the LAN interface board
Chapter 6 Replacing Assemblies
To remove and replace the LAN interface board
To remove and replace the GPIB interface board
To remove and replace the GPIB interface board
Acquisition cable W11 Keyboard cable W16
To separate the scope interface board and SVGA display board
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
To remove and replace the floppy disk drive
To remove and replace the motherboard
To remove and replace the floppy disk drive
7 Disconnect these cables from the motherboard
6-23
To remove and replace the motherboard
To remove and replace the power supply
To remove and replace the power supply
To remove and replace the fan
To remove and replace the fan
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
To remove and replace an attenuator
To remove and replace an attenuator
Do Not Remove the Attenuators from the Acquisition Board
To remove and replace an attenuator
Chapter 6 Replacing Assemblies
If You Permanently Replace Parts
Removing an Attenuator
To reset the attenuator contact counter
11 In the Attenuator Channel box, select the channel you are changing
To reset the attenuator contact counter
13 Repeat for each channel you need to change
Chapter 6 Replacing Assemblies
To remove and replace an acquisition hybrid
To remove and replace an acquisition hybrid
4 Loosely install the two M2 pan-head screws
3 Remove the two screws to remove the connector
2 Follow the procedure for removing the hybrid
The Hybrid Connector
1 Remove the acquisition board from the instrument
Ordering Replaceable Parts Listed Parts Unlisted Parts
Replaceable Parts
Power Cables and Plug Configurations Exploded Views
Replaceable Parts List
Ordering Replaceable Parts
Replaceable Parts
Power Cables and Plug Configurations
Power Cables and Plug Configurations
Power Cables and Plug Configurations
Chapter 7 Replaceable Parts
Exploded Views
Chapter 7 Replaceable Parts
Exploded Views
Fan and Acquisition Assembly
Chapter 7 Replaceable Parts
Exploded Views
Power Supply and PC Motherboard
Chapter 7 Replaceable Parts
Exploded Views
Exploded Views
Chapter 7 Replaceable Parts
Exploded Views
Chapter 7 Replaceable Parts
Exploded Views
Chapter 7 Replaceable Parts
120 Mbyte Floppy Drive Configuration for PC Motherboard Configuration
Chapter 7 Replaceable Parts
Exploded Views
Chapter 7 Replaceable Parts
FIC VA-503A Motherboard for PC Motherboard Configuration
Exploded Views
W17W20 A15 W14 A5 W11 A19
Exploded Views
Chapter 7 Replaceable Parts
Chapter 7 Replaceable Parts
Sleeve and Accessory Pouch
Exploded Views
Old version
Attenuator Assembly
Chapter 7 Replaceable Parts
Exploded Views
Replaceable Parts List
Replaceable Parts List
Chapter 7 Replaceable Parts
Replaceable Parts List Replaceable Parts
Exchange Assemblies
External Chassis Parts
Replaceable Parts List Replaceable Parts
Chapter 7 Replaceable Parts
Description
Adapter board w/ 4 connectors - 120 MB drive to ribbon cables
Replaceable Parts List Replaceable Parts
Chassis assembly compatible w/FIC motherboard configuration
Chapter 7 Replaceable Parts
All Configurations
Replaceable Parts List Replaceable Parts
PROBE I/O ASSEMBLY older style consists of MP16, MP54, and W13
Chapter 7 Replaceable Parts
INSULATOR-120 Mbyte FLOPPY DRIVE only on upgraded units
Replaceable Parts List Replaceable Parts
Chapter 7 Replaceable Parts
Cables
ACQUISITION CABLE w/ AMP-LATCHr connector on each end
Replaceable Parts List Replaceable Parts
ACQUISITION CABLE w/ AMP-LATCHr connector on one end
Chapter 7 Replaceable Parts
Page
Block-Level Theory Power Supply Assembly FPD Monitor Assembly
Theory of Operation
SVGA Display Card GPIB Interface Card Probe Power and Control
Acquisition System Front Panel Disk Drives Attenuators Motherboard
Chapter 8 Theory of Operation
Block-Level Theory
Theory of Operation
Acquisition System
Block-Level Theory
Front Panel
Disk Drives
Block-Level Theory
Probe Power and Control
SVGA Display Card
GPIB Interface Card
Chapter 8 Theory of Operation
Acquisition Block Diagram
Block-Level Theory
TIME BASE
Attenuator Theory
Acquisition Theory
Attenuator Theory
Acquisition Theory
Acquisition Theory
Acquisition Modes
Scope Interface Board
Page
DECLARATION OF CONFORMITY
Safety
Product Name
Model Numbers
Product Regulations
Safety
Emissions
Immunity
Safety
Document Warranty
Safety Symbols
Hazardous voltage symbol
Limitation of Warranty
Product Warranty
Exclusive Remedies
Assistance
