Dual Trace Phase Difference Measurements
(Figure 16)
Phase comparison between any two signals of the same
frequency can be determined using the dual trace feature of
the instrument To make these comparisons, use the
following procedures:
1. Set both the CHI and CH2 Vertical Coupling to
AC.
2. Set Vertical Mode to CHOP or ALT (CHOP is more
suitable for low frequency signals; ALT for the higher fre
quency signals). Position both display traces to the center
horizontal graticule line.
3. Set Trigger Source to CHI, and Trigger Mode to
AUTO.
4. Adjust the TRIGGER LEVEL for a stable display.
5. Connect the reference signal to CHI INPUT connect
or, and comparison signal to CH2 INPUT connector.
CHANNEL 1 CHANNEL 2
MEASURE
TIME FROM
A TO B
HORIZONTAL
DIFFERENCE
FORMULA:
HORIZONTAL y DEGREES/
DIFFERENCE * DIVISION
(A TO Bl
PHASE DIFFERENCE
EXAMPLE
0.6 x 46V . o
DIVISION OIVISION "
(2237-21) 2424-18
Figure IS. Example of dual tract phata diffarenca measurement.
&
28
305 Operators
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