In my lab experiment (http://www.ele.uri.edu/courses/ele436/labs/expA2.pdf), My amplitude modulated wave is not displaying the vertical lines-the high frequency waves of carrier (as shown in accompanied figure).
top- message signal; bottom = modulated wave(here overmodulated)
top- message signal;bottom = modulated wave(here m<1) What could be the possible reason for it. Has flickering display of oscilloscope caused the problem?. How it can be corrected?