GE VALUTROL MAIN CONTROL MODULE Instructions Manual page 19

GEK-24994
WAVEFORMS
All illustrations were photographed in the forward motoring quadrant with zero volts on center line at 2 msec per dlvislOn.
2 msec/div
10 volts/division
FIG.1S OSCILLATOR (OSC)
2 rnsec/div
Typical of SA, SB & SC
SB lags SA by 120
0
SC lags SB by 120 0
FIG. 17 SYNCHRONIZING SIGNAL (SA)
-0
2 msec/div
2 volts/division
FIG. 16 INITIAL PULSE (IPU)
2 msec/div
With an AC tachometer at 450
RPM
1 volt/ division
FIG. 18 SPEED FEEDBACK (SFB)
-0
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