Differences

This shows you the differences between two versions of the page.

--- filters [2024/10/04 01:33] – river
+++ filters [2024/10/04 01:57] (current) – river
@@ Line 63: / Line 63: @@
 Testing one board, at 870 MHz, RL forwards was -17.41dB, backwards -17.04dB. S21 forwards -1.69dB, backwards -1.67dB. I think it probably doesn't matter which way it is connected.
+I noticed the return loss numbers are significantly different from earalier measurements, which as seen in picture above are around -30dB, not -17dB. I don't think I changed anything. Maybe because the LiteVNA was left to warm up? That is a huge difference though. I tried recalibrating and then got numbers around -25dB, closer to what we had before.