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250- .0564
SE T l
If I -------------- - --- -- ----------- -- - - -- - - C ALIBRATION
FtGURE 1
SINE ADJ B ABOUT CORRECT, BUT SINE
ADJ A TOO F' AR CW• ROT ATE "A'' CCW
UNTIL BOTTOM IS LESS FLAT ANO TOP
MORE F'ULL AND ROUND.
FIGURE 2
SfNE ADJ B TOO F'AR ccw. ROTATE cw
UNTIL TOP IS PROPER SHAPE. fF · BOTH
TO~ AND BOTTOM ARE FLAT, REDUCE
AMPLITUDE WITH SINE ADJ B (CW ROTA-
TION) ANO AO.JUST "A" TO RE-CENTER
WAVEFORM (SYMMETRICAL SHAPE).
F'IGURE 3
NOT ENOUGH ADJUSTMENT OF' EITHER "A"
OR n9tt. IN CREASE AMPLITUDE (CW) WITH
s I NE ADJ 8 A N O A D J u s T ft A " cw T O .R E -
CENTER WAVEFORM•
F'tGURE 4
APPROXIM ATELY OPTIMUM SETTING. OF "A"
ANO "8" AND NOW AN AD"USTMENT OF" SINE
ADJ C WILL ROUND THE BOTTOM OF THE
WAVEFORM PROPERLY•
FtGUAE: 5
SINE ADJ c MADE PROPERLY. OPTIMUM
SINE WAVEFORM.
THE n9rt ADJUSTMENT ADOS SIGNAL TO THE SHAPING CIRCUIT; CCW ROTATION
CAUSES ~LATTENING, CW ROTATION CAUSES THE SINE WAVE TO APPROACH A
TRIANGLE WAVE. "A" ADJUSTMENT CONTROLS DC LEVEL ANO RE-CENTERS THE
WAVEF"ORM. "C" ADJUSTMENT SERVES TO SHAPE ONLY THE BOTTOM OF THE
WAVEFORM.