Filter
Top Products
161
Chapter 8: Theory of Operation
Agilent 1680A,AD-series Logic Analyzer Theory
Agilent 1680A,AD-series Logic Analyzer Theory
PC Motherboard. The Agilent 1680A,AD-series benchtop analyzer is built
around an x86 ATX motherboard. The motherboard serves as the system
backplane through PCI slots and IEEE 1394 ports. The hard drive, flexible disk
drive, and communications ports are all integrated into the 1680A,AD-series logic
analyzer through the PC motherboard. PCI slots are used to house LAN, video,
and the IEEE 1394 interface.
PC Software System. The user interface and I/O run on the PC motherboard
under Microsoft Windows ® 2000 Professional operating system. This is the
primary software system. Windows ® 2000 Professional operating system. This is
the primary software system. Windows ® 2000 Professional provides all the
graphics drivers needed to create the front panel interface as well as providing all
of the software necessary to access the disk drives, to drive printers, and to
process input from pointing devices and the keyboard. Standard Windows ®
drivers are also used for I/O boards installed in the PCI slots and devices
connected to LAN, video, and the IEEE 1394 interface.
Disk Drives. The Agilent 1680A,AD-series logic analyzer contains a 3.5” hard
disk drive as well as a 3.5” micro flexible disk drive.
Flat Panel Display. The Agilent 1680A,AD-series logic analyzer includes an
active matrix thin flim transistor (AM-TFT) liquid crystal color flat panel display
(LCD). The LCD had a resolution of 800 x 600 (SVGA resolution) that measures
12.1 diagonally.
Luminance is software selectable at either 60% luminance or 100% luminance.
The display’s luminance is controlled from the user interface by sending
commands to the IEEE 1394 processor which in turn sends commands to the
front panel microcontroller where luminance is controlled. This board plugs into
a PCI slot on the PC motherboard and has a cable that drives the display.
An inverter is used to provide power to the two fluorescent lamps that make up
the backlight of the liquid crystal display. The inverter’s output voltage is derived
from a +12 V input. The inverter is a separate OEM component that is powered
from the power distribution board.
A custom SVGA display board plugs into a PCI slot. The SVGA board drives the
flat panel display and can also drive a standard external CRT display.
Networking. Networking is accomplished using an OEM board that plugs into a
PCI slot.
Other I/O. The parallel port, audio port, keyboard port, mouse port, serial port,
and USB ports are all integrated onto the motherboard.