What is the meaning of the 75 ohm or 50 ohm ,...etc rating of a coxial cable.
I have been told it is the impedence. But I don't understand it since impedance is the complex number resistance + reactance j in the phasor domain .
So the impedence is purely resistive. But what does that even mean for a signal ? Even if it was for calculating voltage dropped per what ?
I am lossed any help.
How is this value important.
Also how much bandwith does a 75 ohm coxial cable have (i.e what is the highest frequency it can handle and the lowest frequency it can handle ? )
And would different ohm rated coaxial cables have an effect on the highest and lowest frequencies it could handle?
I have been told it is the impedence. But I don't understand it since impedance is the complex number resistance + reactance j in the phasor domain .
So the impedence is purely resistive. But what does that even mean for a signal ? Even if it was for calculating voltage dropped per what ?
I am lossed any help.
How is this value important.
Also how much bandwith does a 75 ohm coxial cable have (i.e what is the highest frequency it can handle and the lowest frequency it can handle ? )
And would different ohm rated coaxial cables have an effect on the highest and lowest frequencies it could handle?