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