Atec Agilent-J2300E - Manual (Page 5)

5
Acquisition Systems
There are two acquisition systems for ATM and WAN: the J2300E Agilent
Advisor mainframe and the J2900A High Speed undercradle.
J2300E Agilent Advisor Mainframe
The J2300E mainframe comprises the acquisition system for all ATM and WAN
plug-in modules plus the V series interfaces, connectors for which are present
on the body of the mainframe. For LAN measurements such as Ethernet 10/100/
1000, Token Ring and FDDI, LAN undercradles can be attached to the J2300E.
In addition, the mainframe includes a full PC running the Microsoft ®
Windows98 ® operating system on a 400 MHz processor, 256 MB of RAM, a built
in keyboard with pointing device, a Super VGA active color display, dual
PCMCIA card slots, stereo speakers and the usual printer and serial ports. The
PC is used to control the mainframe acquisition system and the acquisition
system in any attached undercradle, and to collect and post process results.
With the new 400MHz PC processor and larger momory, post capture filtering and
searches are significantly faster than before, saving valuable troubleshooting time.
Note that the PC is not used for real-time processing of measurements – this is
all done in the acquisition system and plug-in modules. This allows the PC to
handle multiple tasks such as the Dual Simultaneous Analysis feature which
involves the simultaneous control of the mainframe acquisition system and
attached undercradles, as discussed later.
J2900A High Speed Undercradle
The J2900A undercradle is similar in function to the J2300E mainframe except
that it has no built in PC but relies upon the PC contained in the J2300E ATM/
WAN or J3446E LAN mainframes to control it and to collect and post process
results. It accepts all ATM and WAN plug-in modules.
Enhanced decode view
The decode view is user configurable by ‘right clicking’ in the summary view.
The decode view has a very user-friendly, ‘one-line’ and ‘multi-line’ read out in
the summary view. Also, the decode view offers “hex to detail mapping” by
highlighting an element in the detailed view, the corresponding hex element is
highlighted in color in the ‘Hex’ section of the decodes. The reverse is also true.
The Agilent Advisor also has powerful, user-configurable 100ns resolution time-
stamp options as follows:
• Delta — shows the time interval between adjacent cells or displayed filtered
frames.
• Relative — shows the time difference between critical events and other cells in
the traffic flow; for example, if a ping is considered time-zero, cells which
arrived before or after will be time-stamped with their relative corresponding
arrival time.
• Absolute — displays events with date and time with a resolution of 100
nanoseconds.
Color mapping of the protocol layers in the decode view distinguishes each
of the layers in the data flow for easy identification, thus simplifying protocol
analysis.