This is NOT the typical DC output volt-
age waveform. One output SCR is not
functioning. Note the “gap” in the wave-
form. One SCR gate is disconnected to
simulate an open or non-functioning out-
put SCR. Each vertical division repre-
sents 50 volts and each horizontal divi-
sion represents 2 milliseconds in time.

Note: Scope probes connected at
machine output terminals: (+) probe to
positive terminal, (-) probe to negative
terminal.

Volts/Div.......................50 V/Div.
Horizontal Sweep...... 2 ms/Div.
Coupling..............................DC
Trigger..........................Internal

Scope Settings