A Ka-band chirped-pulse Fourier transform microwave spectrometer

► Design and characterization of a 25-40 GHz CP-FTMW spectrometer. ► Measured transitions of OCS and isotopologues in natural abundance. ► Measured transitions of acetaldehyde and isotopologues in natural abundance. ► Kraitchman substitution structure of two lowest energy conformers of ethyl formate. ► Discussion of spurious signals in broadband measurements.