17-11-2018, 09:01 PM
Just realised that the audio modulation is slightly more complex than the video. In the absence of modulation, the carrier in an AM signal isn't zero, it's a finite value. When the audio swings +ve the output of the modulator rises, when it swings -ve the output falls. Falls to zero at 100% modulation.
Hence:
Modulated_audio <= (k + Audio) * Carrier;
where k i s a constant equal to half the p-p audio amplitude.
Hence:
Modulated_audio <= (k + Audio) * Carrier;
where k i s a constant equal to half the p-p audio amplitude.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
