An arbitrary waveform generator based chirped pulse Fourier transform spectrometer operating from 260 to 295Â GHz

► We built a spectrometer that operates between 260 and 295 GHz based on CP-FT techniques. ► The spectrometer includes an active VDI multiplier chain and subharmonic mixer. ► The spectrometer has the ability to measure 35 GHz in 2 μs. ► We demonstrate that this spectrometer has frequency accuracy to within 35 kHz.