Matrix Switching A matrix switch connects multiple inputs to
multiple outputs and therefore offers more switching flexibility than a
multiplexer. Use a matrix for switching low-frequency (less than 10 MHz)
signals only. A matrix is arranged in rows and columns. For example,
a simple 3x3 matrix could be used to connect three sources to three test
points as shown below.
Any one of the signal sources can be connected t o any one of the test
inputs. Be aware that with a matrix, it is possible to connect more than
one source at the same time. It is important to make sure that dangerous
or unwanted conditions are not created by th ese connections.
Form C (SPDT) Switching The 34903A Actuator contains 20 Form C
switches (also called single-pole, double-throw). You can use Form C
switches to route signals but they are typically used to control external
devices.
Source 2
Test 1 Test 2 Test 3
Source 3
Source 1
NC
COM
NO
NC
COM
Channel Open
(NC Contact Connected) Channel Closed
(NO Contact Connected)
NO
NO = Normally Open
NC = Normally Closed
3
Chapter 3 System Overview
Signal Routing and Switching
59