I'm facing a doubt in transient simulation in ADS.
In many setups I've seen placing a resistor in series to the transient voltage step generator. Placing the series resistor, and simulating the below circuit, I obtain the plots which follow.
My goal is to simulate just the reflection between a step generator and a matched transmission line. I don't understand if the step generator already includes a series resistor in the ADS component (I guess not, and this is the reason why we place the 50 ohm resistor). However, what I don't understand is that at the node 'bbb' the voltage is 0.5 V (as it can be seen from the plot). Since no reflection should occur, should not the node 'bbb' be equal to 1 V? I'm thinking about a practical setup: if we set the signal generator with impedance 50 ohm and next in series we place a matched load (50 ohm), should not be the node 'bbb' at the same voltage of the signal generator (no reflections i.e. no variations)?
Thanks in advance!