Answers for frame 13: a. linear check at or Just before midpoint of
b. convergent check each or every input.
c. divergent check any output for normal indication.
14. There are two other types of signal flow paths which are found in many
systems: switching and feedback. These are shown in figure 19.
igure 1 9.
Switching circuits are common in all types of systems. To check this
type of signal flow path, simply check to see which circuits are affected by
changing the position of the switch. Feedback circuits are common in many
types of communications, control, and computer systems. To check a feedback
circuit, modify the feedback (change it by either completely disconnecting it
or by changing its value with a control) while checking the output. There
should be a noticeable indication in the output when the feedback is
If a troubleshooter is checking to see which circuits are affected by a
trouble, ("through the use of a switch") he is probably checking a_________
type of signal flow path. If he is checking a feedback type
of signal flow path, he is modifying the______________________ while
checking the effect on the___________________________ .