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Recently I calculated the Vm and the Vc. However I think the value is ackward and strange.

This is the scope image: enter image description here

With the information: enter image description here

This is what I have done: enter image description here

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It seems right to me , at least the shape I can’t say much about the value though because I don’t know the details of this case

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wrong --> Looks like your frequency varies from 3KHz to about 1.5KHertz.

Variation is 3 cycles per division, to 1.5 cycles per division, at 500uSec per division, thus 6KHz to 3KHz.

wrong -->The deltaF is 1,500 Hertz, suggesting 15 volts is the modulation input.

The correct deltaF is 3,000Hz, which at 100 Hertz/volt suggests 30 volts is the peak-peak modulation input.

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  • \$\begingroup\$ Can we calculate it like this: f=cycles/time = 25/5*10^-3 = 5000Hz then the Baseband = 5kHz ... Because I do not see the 3Khz and 1500Hz \$\endgroup\$ Aug 21 '20 at 21:00

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