Introduction; Basic Multiplexer Configurations - Keithley 7015-S Instruction Manual

2.1

Introduction

This section covers the basics for multiplex switching and is
arranged as follows:
2.2 Basic multiplex configurations: Covers the basic
multiplex configurations: quad 1 × 10 configuration, dual 1
× 20 configuration and single 1 × 40 configuration. The sig-
nificance of the backplane jumpers is also covered here.
2.3 Typical multiplex switching schemes: Explains
some of the basic ways a multiplexer can be used to switch
source or measure applications. Covers single-ended switch-
ing, differential (floating) switching and sensing.
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Multiplexing Basics
2.4 System expansion: Discusses the various configura-
tions that are possible by using multiple cards.
2.2 Basic multiplexer configurations
A simplified schematic of the Model 7015 multiplexer card
is shown in Figure 2-1. It is organized as four 1 × 10 multi-
plexer banks. Each bank has 10 inputs and one output. Two-
pole switching is provided for each multiplexer input, with
HI and LO switched. Two or more banks can be jumpered to-
gether to expand multiplexer inputs, and backplane jumpers
provide bank connections to a second card installed in a
Model 7001 or Model 7002 mainframe.
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2-1