Hi Howard, thanks for your design, I'm working on my design and I'm facing 'wrong' sequences when I swipe (manually) the transponder across the loop. Fixed transponder causes about 100% good readings. Mostly the error seems to be a missing zero bit (no reverse). To give an idea 1600 of 2000 packets are correct (considering the full length of the frame). Also the errors are located in two 'burst' of wrong packets (maybe wire crossing?). Do you have any number to check if I have to debug further or the values seem 'right'. At the moment I'm spitting out every packet I receive, without any check for repetition. The wrong packets do not repeat in sequence.