Power System

• Requirement is to develop a system that– Supplies required voltages and currents– Provide PS housekeeping measurements– Very low noise

• Present approach-- develop PS for T/V test that runs the electronics– Use VICOR recommended filtering (very likely

inadequate for ANITA flight)

• After T/V test, work on noise reduction

Power System Components for T/V Test• DC-DC Converter Box

– 7 boards at present—Room in box for an additional 2 boards

• +12V at 1A• -12V at 1A• +5V at 30A• -5V at 2A• +3.3V at 25A• +2.5V at 16A• +1.5V at 2A

• Instrument Power Box– One DC-DC Converter; Room for two

more– Relays

Only three used for T/V test

– Charge controller- in box but not hooked up for test

• Cables• 24 V Input Cable--IP Box to DC-

DC Conv.Box; +24, +12, -12• cPCI Power Cable--DC-DC Conv.

Box to cPCI; +5, +3.3, GND• cPCI Power Cable--DC-DC Conv.

Box to cPCI; +12, -12, +5, +3.3• Turf power Cable--DC-DC Conv

Box to Turf; +3.3, +2.5, +1.5, -5• 2 Housekeeping Cables—DC-DC

Conv Box & IPB to HSK Cond box; HSK signals

• Cable into T/V made in Palestine

• Bus Bar Board• Originally suggested by PD, but

based on misconception of cPCI crate

• Not needed since cPCI crate provides excellent grounding

DC=>DC Converter Boards