The basic properties of the signal flow graph are:
- Signal Flow Graphs are applicable to linear systems
- It consists of nodes and branches. A node is a point representing a variable or signal. A branch indicates the functional dependence of one signal on another
- A node adds the signals of all incoming branches and transmits this sum to all outgoing branches
- Signals travel along branches only in a marked direction and is multiplied by the gain of the branch
- The algebraic equations must be in the form of cause and effect relationship