A single-channel analyser (SCA) counts the number of voltage pulses whose height falls within an adjustable range. A multi-channel analyser (MCA) sorts the pulses according to height and counts the number in each spectral window to give a spectral energy distribution. Does this mean the resolution of spectrums with an MCA will be better than with a SCA? Are there any other advantages to using a MCA over a SCA? Are there any advantages to using a SCA over a MCA? I can't really think of any aside from resolution.