On Mon, Feb 17, 2025 at 03:15 PM, Jinxie wrote:
As for the 50 ohms, that's the 'system impedance' and there's nothing I can do
to change that!
Sure there is. Download the reference impedance renormalization utility near the top of the following page. Download instructions are at the bottom of the page.
Try various renormalization impedances until you get a reasonable response. Google AI says the impedance is around 1.5k ohms for typical 455 kHz IF filters. I'm not sure I'd trust that number, but I think you'll know when you've chosen something close to the correct value.
Brian
