Service manual

Getting Started 13Chapter 1
Installing VXI Instruments
This section shows how to install A-, B-, and C-Size VXI instruments
(modules) in an E8408A mainframe, including:
• Slot 0 Functions
• Installation Guidelines
• Installing C-Size Instruments
• Installing A- and B-Size Instruments
Slot 0 Functions The E8408A mainframe has 4 slots labeled 0 through 3. Any VXI instrument
can be installed in slots 1 through 3. However, slot 0 is reserved for devices
capable of providing the system’s slot 0 functionality, such as the E1406A
Command Module (GPIB) or E8491A (IEEE 1394). This functionality
includes:
• locating instruments installed in the mainframe
• managing (arbitrating) data flow across the backplane
• providing the system clock (SYSCLK - 16 MHz)
Installation
Guidelines
1 Multiple instruments that combine to create a virtual instrument (e.g.,
a scanning multimeter), and instruments which access the backplane
local bus should be installed in adjacent slots.
2 To prevent damage to VXI instruments, do not install instruments
unless the Power On/Standby switch is in Standby position.
3 Insert the instrument into the mainframe by aligning the instrument
with the card guides inside the mainframe. Slowly push the
instrument into the slot until it seats in the backplane connectors.
The front panel of the instrument should be even with the front edges
of the mainframe.
When installing or removing an instrument in Slot 0, you will need to
move the front panel protective bumper aside. Restore the bumper to
its original position after the instrument is installed or removed.
4 Tighten the retaining screws on the top and bottom of the module.
WARNING All instruments within the VXI mainframe are grounded
through the mainframe chassis. During installation, tighten
the instrument’s retaining screws to secure the instrument
to the mainframe and to make the ground connection.
Note The E8408A is shipped with 1-slot (E8408-44305) and/or 3-slot
(E8400-44306) plastic filler panels that do not provide EMC protection.
To comply with EMC requirements, order 1-slot metal filler panels
(E8400-60202) to cover empty mainframe slots.