Double click on the input source, select a sinusoidal generator and set the value to 1V and a frequency of 50 Hz
For analyzing the corresponding output voltage fix a voltage pin to the output resistor
From menu Analysis select Transient… and set a range of time of 1 sec
The transient analysis window appears
Now let’ s run an AC Analysis from 1Hz to 1MHz, selecting AC Transfer Characteristic from AC Analysis