Resonant Magnet-Field Antennas Pt.2:AM-Modulation & Measuring Bandwidth, Q-Factor and Damping-Factor
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- Опубліковано 14 жов 2024
- Roger demonstrates with many experiments how Amplitude-Modulation (AM) works and how you can easily measure the Q-Factor of a tank-circuit (aka LC-resonant-circuit) with everyday test-equipment.
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Of course the concept of the Q-Factor, Bandwidth and Damping-Factor is explained and as always in this series: Only one simple formula to remember :-)
Further Links:
Part 1 of this video-series → • Resonant Magnet-Field ...
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Very interesting, thank you.
I love the way you explain and illustrate in real world these concepts in a practical manner, without burying the audience in math or going into esoteric tangents. Very good. Thank you. I wish I had found your videos when they were first published.
I'm learning a lot from this series, thank you Roger. I appreciate the thorough review of basic RC concepts as much of this information is often taken for granted by net instructors. The result is an incomplete understanding by those of us who are attempting to teach ourselves new skills or augment old ones after a career in a different specialty. Thanks again.
brilliant educational series, appreciate your work, thankyou for sharing... ✌😎
Very valuable information your are sharing here that too with lot of explanation on the concepts and practically showing us with experiments, thank you very much.
very details explaination and equipments to support. this. make me much easy to understanding, thanks.
Getting smarter with each episode and thinking about application of these ideas.👍🏽
Love this series! Thanks again!
Thank you so much. This is finally coming together for me.
Thank you very much excellent explanation
The carrier freq is the first harmonic. What you called the first harmonic is the second harmonic.
Using method 3 to measure Q, couldn’t you simply use the resonant frequency and the time interval (from beginning of oscillation to 1/2 amplitude point of oscillation) to calculate the number of cycles instead of counting each wave?
Also, seems to me method 3 would be most accurate because the granularity of the measurement using this method seems greatest.
Perfect video.. :) Thank you.. :) .. tell me please, your oscilloscope and signal generator are both in 50 ohms impedance mode or why do you use mega ohms..?
When you couple a signal into (or out of a) LC tank-circuit, you have to know that with high Q-factors the so called resonane-resistance can be several Megohms. For not changing the Q-factor you have to couple in/out the signal with at least 10 Megohms (better 100 Megohms).
Function generators with their 50 Ohms output would basically short out an LC tank-circuit.
@@KainkaLabs I see your point, but then resistance has an effect on the damping constant of oscillation(high resistance in series with LC circuit) .... thank you...
Hi, .. Thanks too much sir.
U.S. is down to 3khz bandwidth now on AM. They have pretty much killed audio quality
That's interesting, I hadn't heard that...does anyone know if that was to accommodate HD AM?