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Thanks for the response and that correction in the first remark.
So if I u derstood correctly, even though an induction loop is missing a significant E-Field, and only has a magnetic component, I can use a standard RF spectrum analyzer or simple tuner circuit to capture a modulated inductors...
Hey everyone,
I have a question about induction loops, for example those used for hearing assistance or other short-range communication applications. I assume that they are magnetically coupled systems whereby the transmitter generates current in a parallel resonant circuit tuned to a specific...
Hi everyone.
I'm going to be teaching a second semester undergraduate electronic circuits course this year. It covers magnetism and AC circuits using resistors, capacitors, and inductors. So essentially passive RL and RC circuits.
I remember when I took this course I found it rather dull...
Another question on RF interference.
I understand sparks cause serious RF interference. But I'm trying to understand the physics. From my understanding, an arc of several thousand volts causes ionization. But why does ionization generate rather powerful electromagnetic waves?
To add to my...
Question that popped in my head. Refer to a statement from Cisco regarding interference on 2.4 GHz signals from this page:
I'm curious what physically about a metal fence causes interference when the spacing is on the order of a 1/2 or 1/4 wavelength? At first I was considering the concept of...
Thank you for the response. Your example of the hearing loop system was perfect.
Although I think there was some confusion in the way I phrased my questions. Some responses:
1) in response to "Speech signals ARE the modulation":
Yes, technically speech is modulation. But most RF context...
I'm going to revive this post for a hypothetical question.
Suppose we CAN build an antenna that is 75km long. What else would require us to modulate speech signals?
So we'd have some type of transmitter, transmitting a direct speech signal at say 1kW.
Would that be a 1kW audible signal heard...
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