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Adjust the signal from the signal generator until its frequency is almost identical to the signal from the power pack. Observe the crash softball trace vary with time in the usual beat fashion. Get a student to check that the wave pattern on the oscilloscope seems to match the voice pattern from the earphones. Point out the carrier wave and the amplitude modulated signal on the oscilloscope. This prac should take 1 to 1. Return to Contents The following is can you rotate a pdf example Practical Report totate. The Prac itself is NO LONGER required by the syllabus but can still be used to provide students with an example of how to write Physics Practical Reports.