Agilent 34970A/34972A Data Acquisition / Switch Unit

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Chapter 5 Theory of Operation Theory of Operation This chapter is organized to provide descriptions of the circuitry contained on each schematic shown in chapter 8. A block diagram overview is provided. • System Block Diagram, on page 129 • Floating Logic, on page 130 • Memory, on page 133 • Earth-Referenced Logic, on page 134 • Power Supplies, on page 135 • Front Panel, on page 137 • Backplane, on page 138 • Internal DMM, on page 139 • <strong>Switch</strong> Modules, on page 148 • Multifunction Module, on page 161 The self-test procedures are described in chapter 6. 128
Chapter 5 Theory of Operation System Block Diagram System Block Diagram A simplified block diagram is shown below. Not all systems have an Internal DMM. In these systems, the internal DMM connections to the analog bus and the floating logic are left open. The major portions of each block are described in the following sections. 4 5 129
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Agilent 34970A/34972A Data Acquisit
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Safety Notices A CAUTION notice den
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Note: Unless otherwise indicated, t
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The Front-Panel Menu at a Glance Se
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The 34970A Rear Panel at a Glance 4
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The Plug-In Modules at a Glance For
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34907A Multifunction Module • Two
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Contents Chapter 1 Specifications D
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Contents Gain Adjustment 92 -10 VDC
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Contents Plug-In Module Disassembly
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1 1 • DC, Resistance, and Tempera
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DC Measurement and Operating Charac
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AC Measurement and Operating Charac
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Chapter 1 Specifications System Spe
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Chapter 1 Specifications Module Spe
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Typical AC Performance Graphs 34905
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Product and Module Dimensions Chapt
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Chapter 1 Specifications To Calcula
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Chapter 1 Specifications Interpreti
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Chapter 1 Specifications Configurin
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2 2 Quick Start
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Chapter 2 Quick Start To Prepare th
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Chapter 2 Quick Start To Connect Wi
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Chapter 2 Quick Start To Configure
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Chapter 2 Quick Start To Close a Ch
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Chapter 2 Quick Start If the Instru
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Chapter 2 Quick Start To Rack Mount
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3 3 Front-Panel Overview
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Chapter 3 Front-Panel Overview Fron
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Chapter 3 Front-Panel Overview Fron
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Chapter 3 Front-Panel Overview To S
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Chapter 3 Front-Panel Overview To P
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Chapter 3 Front-Panel Overview To R
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Chapter 3 Front-Panel Overview To W
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Chapter 3 Front-Panel Overview To O
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4 4 Calibration Procedures
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Chapter 4 Calibration Procedures Ag
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Chapter 4 Calibration Procedures Re
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Chapter 6 Service Self-Test Procedu
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Chapter 6 Service Self-Test Procedu
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Chapter 6 Service Disassembly Disas
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Chapter 6 Service Disassembly Inter
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Chapter 6 Service Disassembly Addit
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Chapter 6 Service Disassembly Recyc
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Chapter 6 Service Disassembly Part
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Chapter 6 Service Parts List for 34
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Agilent 34970A/34972A Data Acquisition / Switch Unit

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