DIP Switch

The PCIe-8383 has a DIP switch with four switches, which can be found on the top-left corner of the board as shown in the PCIe-8383 block diagram. Refer to the PCIe-8383 Theory of Operation page linked below to view the block diagram.

Figure 5. PCIe-8383 DIP Switch

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BIOS Switch

The BIOS switch enables the BIOS compatibility feature. The BIOS switch is disabled by default.

Enabling BIOS compatibility requires the installation of MXI-Express BIOS Compatibility software on the host PC. Refer to the Compatibility with Host PCs page linked below for more information on BIOS compatibility.

Table 6. BIOS Switch Functions
Position Function
Left (default) Disabled
Right Enabled

RESERVED Switch

The RESERVED DIP switch has no function and should be kept in its default position (left).

CLK Switch

The CLK sets the clocking mode. The PCIe-8383 supports two clocking modes: spread spectrum clocking (SSC) and constant frequency clocking (CFC). SSC can reduce radiated emissions and some types of electrical noise in the system. The CLK switch is set to SSC mode by default.

Table 7. CLK Switch Functions
Position Function
Left (default) SSC mode
Right CFC mode

WAKE Switch

The WAKE DIP switch enables the target PXI chassis to wake up the host PC when you press the chassis power button. The WAKE switch is enabled by default.

Table 8. WAKE Switch Functions
Position Function
Left Disabled
Right (default) Enabled