ADLINK PXI-8570 - Manual (Page 13)

Installation • 9
is the drive letter of your CDROM)
3. This setup program will copy the necessary files to your hard drive
automatically. When the hardware installation process is complete,
reboot the computer for the changes to take effect.
2.5 Hardware Installation
2.5.1 Jumper Setting (only for PXI-8570)
Spread Spectrum Jumper Setting
When PXI-8570 plugged into the system slot, it provides a discrete clock signal to
each of the peripheral slot defined as a PCI clock (CLK0, CLK1, CLK2, CLK3,
CLK4, CLK5, and CLK6).
An important feature of the PCI/PXI-8570 extension modules is that they support
33MHz/66MHz clock operating environment. As system clock increase,
electromagnetic interference (EMI) becomes a challenge for the system
designers. PXI-8570 adopts a spread-spectrum clock generator to help user to
deal with this difficult task.
Spread spectrum clocking speeds up and slows down the clock within a few
percent of its fundamental frequency. By reducing the peak amplitudes, the
system will more likely meet EMI emission compliance standards. In other words,
spread spectrum clocking distributes the energy that was originally concentrated
on one frequency over a wider band. This method dramatically reduces the
amount of EMI.
You can follow Figure 2.1 to turn on the spread spectrum clock generator.
Spread Spectrum Control JP1
OFF (default)
1 2 3
ON
1 2 3
Figure 2.1 Spread Spectrum Jumper Settings
M66EN Jumper Setting
PXI-8570 supports 64-bit or 32-bit PCI buses operating at 66MHz or 33MHz. A
bundled link can support the full bandwidth of 64-bit/66MHz PCI bus. You can