I am trying to determine the output impedance of a buffer using the run terminator wizard. The expected answer is 150 ohm. But the terminator says it's 50 ohms. See attachment.

Assuming output impedance is 150 ohms, I have a 168 ohm tx line (also tried with a 168 ohm termination to ground before the load).

The series resistor should be 18 ohms, but it's 56 ohms with a bunch of warnings --

**Warning: driver impedance is rather large.**

**Wide driver impedance tolerance may hinder termination.**

Hello Hithesh,

The termination wizard shows the driver output impedance is 49.6 ohms. The effective impedance seen by the driver (looking toward the receiver) is 106.6 ohms. 106.6 ohms - 49.6 ohms = 57 ohms. That is what the termination wizard is suggesting. I hope that helps you out.

Best regards,

Ed.