The sine[19:0] signals you are monitoring are analog signals, which you can view better in Analog wave mode. You can choose to display a given signal as Digital or Analog in the Waveform window.
- In the Waveform window, select the
- Right-click to open the popup menu, and select
, as shown in the figure
- Right-click to open the popup menu again, and select
as shown in the figure