Power Up Routine - Agilent Technologies 16800 Series Service Manual

8
Theory of Operation
Front Panel Touch Screen (Option 103)
Attached to the front panel assembly (in models ordered
with Option 103) is a Touch Screen Control module used to
implement the touch screen. The touch screen controller
board is a 3M SC801U. Mounted in front of the flat panel
display is a touch screen grid connected directly to the
touch screen controller. The controller interprets touch
presses and communicates with the host CPU via USB.

Power Up Routine

The power up routing includes the following:
• Boot sequence (more on page 177).
• Product install (more on page 181).
• Software recovery methods (more on page 181).
• Self test (more on page 182).
Boot Sequence
The 16800 Series logic analyzers having the serial number
prior to MY50370000 are shipped with the Windows XP
Professional operating system. The 16800 Series logic
analyzers having the serial number MY50370000 or higher
are shipped with the Windows 7 operating system.
After power is applied to the frame, the basic input/output
system (BIOS) is the first thing to run. Among other things,
the BIOS is responsible for enumerating plug- and- play (PnP)
devices in the system and doing a "power on self test"
(POST). All of the CPU (motherboard) RAM is checked
during POST- - however, subtle memory problems may not be
detected by this simple test. If any hardware that the BIOS
detects is malfunctioning at a fundamental level, then the
BIOS reports an error to the display (if available). If things
are OK, control is turned over to the operating system.
On Windows XP, during startup, the Agilent logo is displayed
by the system BIOS, then a few other messages, and finally
the preliminary Windows XP startup screens.
On Windows 7, you are automatically logged on to the
system using the Administrator account and the Windows 7
desktop is displayed.
During the first phase of the Windows startup, the kernel is
loaded along with various system drivers. Prior to the video
drivers loading, video is only displayed to the same video
16800 Series Portable Logic Analyzers Service Guide 177