Specifications
Table Of Contents
- General Information
- Preparing for Use
- To inspect package contents
- To connect power
- To connect the mouse, keyboard, LAN, printer, and GPIB cable
- To connect the standard 10073C probes
- To connect optional InfiniiMax oscilloscope probes
- To connect the digital probe
- Digital probe lead set
- To tilt the oscilloscope upward for easier viewing
- To turn on the oscilloscope
- To turn off the oscilloscope
- To verify basic oscilloscope operation
- Installing application programs on Infiniium
- Changing Windows System Settings
- To clean the oscilloscope
- Testing Performance
- Calibrating and Adjusting
- Troubleshooting
- To install the fan safety shield
- To troubleshoot the oscilloscope
- Primary Trouble Isolation
- No Display Trouble Isolation
- To check the backlight inverter voltages
- To check the display board video signals
- Power Supply Trouble Isolation
- To check probe power outputs
- To Check the keyboard
- To check the LEDs
- To check the motherboard, CPU, and RAM
- To setup the BIOS
- To troubleshoot the acquisition system
- Software Revisions
- Replacing Assemblies
- To return the oscilloscope to Agilent Technologies for service
- To remove and replace the top cover
- To remove and replace the bottom sleeve
- To disconnect and connect Mylar flex cables
- To remove and replace the CD-ROM drive
- To remove and replace the AutoProbe assembly
- To remove and replace the internal digital input cable (MSO models only)
- To remove and replace the backlight inverter board
- To remove and replace the front panel assembly
- To remove and replace the keyboard, touch screen, and flat-panel display assemblies
- To remove and replace the acquisition board assembly
- To remove and replace the PCI bridge board
- To remove and replace the display board
- To remove and replace the hard disk drive
- To remove and replace the motherboard
- To replace the Intel motherboard with the ADLINK motherboard
- To remove and replace the power supply
- To remove and replace the fan controller board
- To remove and replace a fan
- To remove and replace the probe power and control assembly
- Replaceable Parts
- Theory of Operation
- Index
Chapter 8: Theory of Operation
Block-Level Theory
152
Power Supply Assembly
The AC input to the power supply is 100–240 VAC, +/-10%. Maximum input power is 440W. The
AC input frequency is 47 to 63 Hz.
Filtered voltages of +5.1 V, –5.2 V, +12.2 V, 3.3 V, and –12.2 V are supplied and distributed
throughout the oscilloscope.
FPD Monitor Assembly
The Flat Panel Display (FPD) monitor is a thin film liquid-crystal display (TFT-LCD). This FPD
is an 8.4-inch diagonal, 1024 by 768 pixel XGA color monitor. The assembly requires +3.3 V and
+12 V from the power supply.
A twin fluorescent back light provides illumination for the LCD. The Backlight Inverter assembly
converts the +12 V to +300-1000 volts (acrms) and drives the back light.
Acquisition System
The acquisition system includes four attenuator assemblies on the acquisition board. The
attenuators condition the signal, which is then digitized and stored by the acquisition board. The
graphics board provides the system control interface from the motherboard, and also interfaces
the acquisition board to the display board for display of the acquired data. More detailed theory
on the acquisition system follows this top-level block theory.
Attenuators
The attenuators provide the appropriate impedance matching and all the attenuation and gain
selection for each input channel. The attenuators are part of the acquisition board.
Front Panel
The front panel is read and controlled by a micro controller IC. This device contains a
microprocessor, RAM, ROM, and a DUART for communication with the microprocessor on the
main assembly. The micro controller is located on the keyboard and communicates with the
system control circuitry through an RS-232 cable. It reads the keys and knobs and controls the
LED indicators.
The elastomeric keypad has 30 keys, all dedicated to a single function to improve ease of use. A
conductive element on the inside of each key shorts a gap on the underlying keyboard circuit.
The keyboard controller detects this short and sends the proper keypress information to the
system controller on the motherboard.
There are eleven dedicated knobs. Each knob controls a mechanical encoder. The output of the
encoder is a 2-bit gray code that is read by the micro controller for direction and distance turned.
A push button controls the power through a Remote Inhibit sense line that is routed to the power
supply.
Disk Drives
The hard disk drive is a high-capacity, shock-resistant unit. It is used to store the oscilloscope
operating system and certain system configuration data.
The drive can also be used to store and recall oscilloscope setups and waveforms.