Excitation pulse is ubiquitous in Nuclear Magnetic Resonance (NMR) spectroscopy, being the starting point of all experiments. The standard method is to excite the spins on resonance. However due to phenomenon of chemical shifts the resonance frequency of spins are dispersed over a range. The challenge is then to excite the spins with different resonance frequency with same pulse whose amplitude is smaller than spread of frequency of the spins. In this talk we present two methods to address this problem of broadband control. The method of multiple sweep and chirp excitation.