User`s guide

71
Chapter 3 System Overview
Signal Routing and Switching
3
Multiplexer Switching Multiplexers allow you to connect one of
multiple channels to a common channel, one at a time. A simple 4-to-1
multiplexer is shown below. When you combine a multiplexer with a
measurement device, like the internal DMM, you create a scanner.
For more information on scanning, see page 77.
Multiplexers are available in several types:
One-Wire (Single-Ended) Multiplexers for common LO
measurements. For more information, see page 301.
Two-Wire Multiplexers for floating measurements. For more
information, see page 301.
Four-Wire Multiplexers for resistance and RTD measurements. For
more information, see page 302.
Very High Frequency (VHF) Multiplexers for switching frequencies up
to 2.8 GHz. For more information, see page 312.
Common
Channel 1
Channel 2
Channel 4
Channel 3
34970A Refresh UG.book Page 71 Wednesday, February 17, 2010 12:34 PM