4535 611 98931 iE33 Service Manual Page 79
CSIP Level 1 Theory of Operation: Physical Structure
AC Tray
• Filters input voltage and contains a circuit breaker
• Supplies line voltage (100, 120, 230, or 240 Vac) to the Platform Power Supply and Acquisi-
tion Power Supply
• Supplies line voltage to the OEM transformer and OEM relay for OEM operation.
HV Switcher (Figure 4-4)
• Converts ±15 Vdc and +48 Vdc from the Acquisition Power Supply to ±HV (±30 to ±120
Vdc)
• Supplies ±HV to the NAIM HV regulators for low-pass filtering to reduce power supply noise
and to the Channel Boards through the Acquisition Frontplane (for all transmit waveforms
except CW)
• During CW, turns off power converters supplying ±HV bus and switches the ±15 Vdc to the
±HV bus
• Routes HV to the transducer connector, to provide power for HV mux devices in the trans-
ducer and to power pulsers of the matrix array
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