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FRONT PANEL
DISPLAY
CONTAOL
(PUSHBUTTONS)
Figure 8-1. Multimeter Block Diagram
8-18. DETAILED THEORY OF OPERATION
. Input Circuitry
. Ohms Current Source
. A/D Converter
. A/D Controller
. Main Controller
. AC to DC Converter
IMOADD>
HP 3457A Multimeter
8-5