Tektronix 475A User Manual

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CHOP is more suitable for low-frequency signals. The
reference signal should precede the comparison signal
in time.
4. If the signals are of opposite polarity, set the
INVERT switch to invert the Channel 2 display.
5.
Set the CH 1 and CH 2 VOL TS/DIV switches and the
CH 1 and CH 2 V AR controls to produce displays
that are equal in amplitude.
6. Use vertical pos1t1on controls to vertically center
both signals around the center horizontal graticule
line.
7. Set the TIME/DIY switch to show about one cycle of
the waveform. Position the display and adjust the
8. Measure the horizontal difference between cor-
responding points
on the waveforms at a common
horizontal graticule line (at 50% of risetime) and cal-
culate
the phase difference using the following
formula:
Phase
Difference
(degrees)
horizontal
difference X
(divisions)
sweep
rate
(degrees/div)
MEASURE
TIME FROM
ATO B
VAR TIME/DIY control to place one reference signal I
8
DIVISIONS
cycle in exactly eight divisions at the 50% risetime t-1••--- (3600) ----1
points (see Figure 21 ). Each division of the graticule
now represents
45° of the cycle (360° 7 8 divisions)
and
the sweep rate can be stated as 45° /division.
@ 465B/DM44 Operators
465/DM·0-15
Figure 21. Phase difference.
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Tektronix 475A Specifications

General

Brand	Tektronix
Model	475A
Category	Measuring Instruments
Language	English