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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 62.
Multiplexers are available in several types:
• One-Wire (Single-Ended) Multiplexers for common LO measurements.
For more information, see page 379.
• Two-Wire Multiplexers for floating measurements. For more
information, see page 379.
• Four-Wire Multiplexers for resistance and RTD measurements.
For more information, see page 380.
• Very High Frequency (VHF) Multiplexers for switching frequencies
up to 2.8 GHz. For more information, see page 390.
Common
Channel 1
Channel 4
Channel 3
Channel 2
Chapter 3 System Overview
Signal Routing and Switching
58