Tektronix 475A User Manual

EXAMPLE: The horizontal difference is 0.6 division
with a sweep rate of 45° /division
as shown in Figure 21.
Substituting the
given values:
Phase 0 6 d' · · X 45°/d" · · 27°
Difference
= . IVISJons IVJslon =
HIGH RESOLUTION PHASE DIFFERENCE
More accurate phase measurements can be made by
using the X10 MAG mode to increase the sweep rate
without changing the
VAR TIME/DIV control (see
Figure 22).
EXAMPLE: If the sweep rate were increased 10 times
with the magnifier (X10
MAG), the magnified sweep rate
would
be 45 + 10 = 4.5° /division. Figure 22 shows the same
signals used
in Figure 21, but the X10 MAG push button is
depressed, resulting in a horizontal difference of 6
divisions. The phase difference
is:
Phase
Difference
horizontal
difference
(divisions)
magnified
X sweep rate
(degrees/div)
Substituting the
given values:
Phase Difference
= 6 divisions X 4.5° /division = 27°
CHANNEL1
IRE l
CHANNEL 2
FERENCE
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Figure 22. High resolution ph- diffaranca.
54
4658/DM44 Operators
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Tektronix 475A Specifications

General

Brand	Tektronix
Model	475A
Category	Measuring Instruments
Language	English