I've been reading on amplifier's output impedance. It's common collector amplifier. Take a look
Let me first warn you that circuit in red frame has not been calculated, meaning, I didn't calculate base resistor divider for some specific bias. I just put them there because for what I want to know they doesn't matter.
I want to know what is output impedance of circuit on the right, in red frame, at emitter. I read that it's Rsource/beta
But in this case what is Rsource? Is it output impedance of circuit on the left? If that's the case then Rsource is 330 ohms? Then if beta for 2n2222 is 100, output impedance of circuit on the right should be 3.3 ohms?
On the other hand, R1 could be interpreted as a load resistor on circuit on the left and then output impedance of circuit on the left would be Rc||Rl(R1)?

Let me first warn you that circuit in red frame has not been calculated, meaning, I didn't calculate base resistor divider for some specific bias. I just put them there because for what I want to know they doesn't matter.
I want to know what is output impedance of circuit on the right, in red frame, at emitter. I read that it's Rsource/beta

But in this case what is Rsource? Is it output impedance of circuit on the left? If that's the case then Rsource is 330 ohms? Then if beta for 2n2222 is 100, output impedance of circuit on the right should be 3.3 ohms?
On the other hand, R1 could be interpreted as a load resistor on circuit on the left and then output impedance of circuit on the left would be Rc||Rl(R1)?