6. If input signals are of opposite polarity, pull the CH2 10. Measure the horizontal difference (in divisions) be
INVERT knob to invert the CH2 display (signals may be of tween corresponding points on the two waveforms,
opposite polarity due to 180° phase difference; if so. take
this into account in the final calculation).
11. Multiply the difference (in divisions) by 45° /division
to obtain the exact amount of phase difference.
7. Adjust CHI and CH2 VOLTS/DIV and associated
CAL (Variable) controls for displays that are equal and
about five divisions in amplitude.
8. Set the SEC/DIV switch for a sweep rate which dis
plays about one cycle of reference waveform.
9. Adjust the SEC/DIV CAL (Variable) control for a
one cycle reference signal (CHI) of exactly 8 divisions be
tween the 2nd and 10th graticule lines.
NOTE
Each division o f graticule represents 45° o f cycle
<360° 4- 8 divisions * /division). Therefore,
the sweep rate may he stared in terms o f degrees
as 45° /division.
REV A SEP 1979
305 Operators
29
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