Clive, most of the "magic" of Multi IQ is likely about how the target signal is processed not what and how many simultaneous individual constituent frequencies are transmitted by the coil.  There is ample evidence from those who have actually measured the individual frequency components being transmtted by the coil for the various Equinox modes, that all four of the. Park and Field modes across the board likely, simply use the two frequencies of 7.8 khz and 39 khz (5 to 1 frequency ratio) combin