Switch out the X1 Oscillator on a RPI

Question

Just like a lot of people I'm using a RPi as a NTP server. There is a nice thread about it here: Switch out the X1 Oscillator on a RPI 2/3

User @colintd had a brilliant answer about switching the stock oscillator with a TCXO and he also mentions: "As a 3V3 part it needed AC coupling via a 1nF capacitor, and the DC level setting with 240K & 100K resitors"

I was wondering if he (or anyone) can explain how this capacitor and resistors are connected? Perhaps a small circuit diagram?

Many thanks!

PS. As a newbie here I wasn't able to reply to the original thread, hence a new one.

Answer 1

I tried to ping @colintd via a comment for you. I suppose they suggest making a DC voltage divider with R1=100K and R2=240K, and feeding it the AC signal from the TCXO via the 1nF capacitor.

^{simulate this circuit – Schematic created using CircuitLab}