I have tried a few times to wrap my head around this but I need it dimmed down a shade, all help appreciated.
One of my coworkers is bringing their son in to help me and learn about AV. Because he's a Boy Scout, I'm hoping to hit a few merit badge requirements at the same time. Looking over the "Radio" MB requirements, I see great opportunity to walk through wireless coordination but I realized that I don't actually know the method by which my digital units (Shure QLX-D) work.
I assumed FM due to the the ~360kHz width of a channel but all I can find from the manual under "Modulation Type" is "Shure proprietary digital". Anyone have any resources or avenues to look down so I can understand better to actually somewhat teach it?
So we're discussing about amplitude modulation and one of the questions presented to us is what if the carrier signal has a significantly lower frequency than the modulating signal or the "message" signal and vice versa? The only thing that I can read about this is the one I found on dspstackexchange and I don't quite understand the top rated comment but I do understand the second to the last comment where as I understand that it doesn't matter which is which since modulation is commutative. So if the modulating signal has a higher frequency, then it will just carry the carrier frequency.
I also tested it on Proteus where the audio signal is 500kHz and the carrier signal is 100kHz and the output is looks like the carrier signal but a little bit distorted.
Going back to the question, can someone help me understand what the relationship between carrier signal and modulating signal? What happens if one's frequency is higher than the other?
amplitude for both AC is 5V. Frequency is the only difference between them.
So, I've looked for an oscilloscope and found out that I can't afford them. (Great :( ). Then I found these DIY sound card oscilloscopes and I have an HP laptop lying around in my house.
I don't know whether this is sufficient for me to analyze signals using transistors or some very basic circuits like amplitude modulation, clippers, clampers, etc. If any one of you guys had experience with this please tell me.
Here's the link to the video of the sound card oscilloscope: https://www.youtube.com/watch?v=5s-zocXvk2I
Thanks!
So I understand that AM radio encodes the sound signal in the radio wave by amplitude modulation, so as the radio wave is sent out, the amplitude (signal strength) - controlled by how much power you put into the transmitter - varies in each wave.
What I don't understand is that since the strength of a radio wave will vary with the distance you are from the transmitter, why doesn't AM radio have interference or fail when you are moving? Especially in a car or a plane? Wouldn't the reduction in the signal strength as you move wreck the amplitude modulated signal?
Hey guys, I put together a video showing how and why I use amplitude modulation with granular synths to get more rhythm in my drones. Hopefully you find it useful. https://youtu.be/_-8uHyZERAM
Hi guys, i'm searching a download for amplitude modulatio audio fx. Someone can help me?
Why does shortwave use am rather than fm? (I know fm would require new receivers and transmitters)
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