Excitation and detection of NMR on human subjects is intrinsically limited by the interaction of the RF fields and the subject. Therefore most research focuses on the improvements of RF coils. Moving the RF frontend electronics to the coil however has a major impact on the technology and applies to all coils. Furthermore, the lack of measurements during transmission and switching represents the major gap in the detection of the spin state which poses problems for acquisition of short-lived coherences and spin dynamics under RF irradiation. Methods for reduction and omitting this dead time will be discussed.