Backplane Assembly - Keysight 90000 X Series Service Manual

Chapter 7: Theory of Operation

Backplane Assembly

Backplane Assembly
The backplane assembly is a device on the PCI Express (PCIe) bus connected
by two SATA cables to the motherboard. The backplane assembly receives +12V
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- 4 shows a block diagram
of the backplane board.
Figure 7-4 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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