VPSTX is wired to 3.3Volts. I want to give it +5V to increase the power. This changes Rout from 27 ohms to 16 ohms. I tried using the CR95HF EMI FILTER CALULATION tool to work out component values, without success.
As a baseline, I looked at the 3 volt case, since I already had the answer. I opened the tool and found most of the values default to the values on the board. VPSTX is set to 3 volts and Rin is set to 27 ohms. I had to change Rrx from 0 to 330 and Crx to 1E+12F (infinite capacitor in series). The result (section 2) was C11 = C12 = 41pF and C2 = 301pF. That C11 and C12 value is half of the 82pF used on the board.
When I changed VPSTX to +5 and Rin to 16, the tool gave me C11 = C12 = 29pF and C2 = 301pF. I tried 66pF (and lifted L8 so I could connect +5V) and got much worse performance than before.
In Summary, what am I misunderstanding about the tool, and what are the correct values for attaching +5V to VPSTX?
Thanks for reading this.