The triangular Heisenberg antiferromagnet is the classic example of the frustrated magnet, here the ground state forms a non-collinear 120° structure. A number of different theoretical techniques reveal that the spectrum is renormalized downward from the energies predicted by linear spin-wave theory and that the excitations are strongly damped. Here we wish to investigate the excitation spectrum of the distorted triangular lattice antiferromaget alpha-CaCr2O4 where unexpectedly the distortion is such that it maintain the 120° structure over a large range of exchange interactions. The data will be used to distinguish between models of the exchange interactions and look for departures from linear spin-wave theory.