Agilent Technologies Infiniium 90000 Q-Series Especificaciones descargar pdf (Pagina 133)

Chapter 7: Theory of Operation

Power Supply

133

Power Supply

The power supply is a +12 V bulk supply that is removable, exchangeable, and safety-

approved. It transforms AC power to the main +12 V 100A supply and a small +5 V

supply. The +5 V supply is standby power and is always on whenever AC power is

applied. The +5 V supply is used only by supervisory circuits that monitor and control

all other supplies. In the event of a safety shutdown from the supervisory circuits, LEDs

turn on to indicate the cause of the shutdown. They remain lit until AC power is

removed from the bulk supply.

The +12 V bulk supply is used to create all other supplies in the instrument. +12 V is

turned on by the power switch on the front panel. It is turned off under software

control when a shutdown is requested, or by the supervisory circuits when a fault occurs.

The +12 V bulk supply performs some internal fault sensing and drives LEDs on the

backplane board to indicate its status. It also provides an I

C bus, which is connected

to the main FPGA.

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Agilent Technologies Infiniium 90000 Q-Series Especificaciones Pagina 133