8-Slot PXI Backplane Installation Guide
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Electrical Requirements
PXI Connectors
The PXI connectors (J11-J18, J2-J9) have pin descriptions defined in the
PXI hardware Specification
. The connectors are shown in Figure 3.
Figure 3.
PXI Connectors
System Reference Clock
The 8-Slot Backplane supplies the PXI 10 MHz system clock signal
(PXI_CLK10) independently to each peripheral slot. An independent
buffer (having a source impedance matched to the backplane and a skew of
less than 250 ps between slots) drives the clock signal to each peripheral
slot. You can use this common reference clock signal to synchronize
multiple modules in a measurement or control system. You can drive
PXI_CLK10 from an external source through the PXI_CLK10_IN pin
on the P2 connector of the Star Trigger Slot or 10 MHz IN pin on the J1
connector. Refer to the
PXI Specification
for the Pinout for the Star Trigger
Slot. Sourcing an external clock on either of these pins automatically
replaces the backplane’s 10 MHz source.
1
Slot 1 (Controller Slot)
2
Slot 2 (Star Trigger Slot)
3
Slots 3-8 (Peripheral Slots)
1
2
3
