Agilent Technologies 34972A User Manual page 75

The internal DMM provides a universal input front-end for measuring a
variety of transducer types without the need for additional external
signal conditioning. The internal DMM includes signal conditioning,
amplification (or attenuation), and a high resolution (up to 22 bits)
analog-to-digital converter. A simplified diagram of the internal DMM is
shown below.
Analog
Signal
Input
Conditioning
Signal
Analog to
Amp Digital
Converter
Chapter 3 System Overview
Measurement Input
To/From
Earth
Main
Referenced
Processor
Section
= Optical Isolators
3
75