Top left: raw averaged spectra (blue = on, red = off). Note that the horizontal axis has increasing frequency to the right. The galactic foreground is visible in both positions around channel 470. Mid right: coarsely calibrated spectrum with four offset sub-bands corrected by adjusting their level to that of neighbouring sub-bands. Also shown in green is a second order baseline fit. Bottom left: baseline subtracted spectrum where obvious spikes have been interpolated out. A comparison with the LAB survey spectrum is shown in golden/yellow. The detailed line shape agreement is excellent apart from a portion that is obviously asscociated with an unstable sub-band. Note that the galactic foreground has mostly been subtracted out in the EMBRACE spectrum with only a negative residual remaining.