Specifications

Chapter 7: Theory of Operation
Backplane Assembly
125
Backplane Assembly
The backplane assembly is a device on the PCI Express (PCIe) bus connected by a PCI
Express cable to the motherboard. The backplane assembly receives +12 V DC power
through a power interface board from the bulk supply, and all voltages are derived
from switching power regulators and other circuitry. Most of the switching and circuitry
are on the backplane board, with some distribution and generation done on the
acquisition boards. Figure 7- 5 shows a block diagram of the functions contained on the
backplane assembly.
Figure 7-5 Backplane Block Diagram
The colors in the diagram represent different signal groups. The backplane provides
power (red), clock generation (pink), trigger (green), and calibrator (yellow) functions
to the oscilloscope, as well as communications and control for the PC software (blue).
The PC connects to the measurement system through PCIe to the main FPGA.
Connections to all other circuits go through the main FPGA.
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