Agilent Technologies 34970A Service Guide

A single relay is used to switch two input channels. The choice of
which channel is connected to the common is performed by relay K422.
Channels are paired 20 channels apart (Ch 1 with Ch 21, Ch 2 with
Ch 22, etc.) Relay K421 connects the common to the backplane
analog bus for use with the internal DMM.
Chapter 5 Theory of Operation
Switch Modules
150

Agilent Technologies 34970A Specifications

General

Brand	Agilent Technologies
Model	34970A
Category	Switch
Language	English