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2
Operation
2-1
Introduction
System 40 Custom Microwave Switch Systems are derived from the Keithley Model 7116-MWS. Because each System 40 is
unique, the 7116-MWS will be used to represent a typical configuration for switch system operating principles and troubleshoot-
ing procedures.
The Model 7116-MWS system is a 16-input microwave multiplexer. Sixteen inputs are achieved by connecting five single-pole,
four-throw switches together forming a tree switching network as shown in Figure 2-1.
1!1
IN 1
1!2
IN 2
1!3
IN 3
1!4
IN 4
1!5
IN 5
1!6
IN 6
1!7
IN 7
1!8
IN 8
1!9
IN 9
1 ! 1 0
IN 10
1 ! 1 1
IN 11
1 ! 1 2
IN 12
1 ! 1 3
IN 13
1 ! 1 4
IN 14
1 ! 1 5
IN 15
1 ! 1 6
IN 16
1 ! 2 1
1 ! 2 2
1 ! 2 3
1 ! 2 4
OUT
Figure 2-1
Tree switching network