LQI is quality etc reason of 40% I had Tx a bit near to Rx and it was simple case of being over swamped. Normally you would expect this to be as high as possible but I have set alarm to go off at 40% and 45% in the Core. Also when I was testing and took photo one of the patch antennas was actually upside down and one was right side up! Not ideal :-)
dBm is showing the strength of signal ie the typical antenna you have on a JR/Futaba/Spekky is normally a 2db gain antenna. If we see the output attenuated then the dB figure will alter. The Core uses patch antennas same as the Weatronic did achieving 180deg perfect radiation from antenna, these antennas achieve a greater all round output with no ‘squashed doughnut’ radiation patterns such of those from the end of a normal dipole antenna. For example if you cover the top of the patch antennas with your hand you are attenuating the output hence the change in dBm figure.