Polarimetric profiles for PSRs J0125-2327, J0613-0200, and J1022+1001, as measured with the NUPPI backend at 1.4 GHz. The black lines represent the total intensity (Stokes parameter I), the red lines indicate the linear polarization (L), and the blue lines represent the circular polarization (V). The left panels show the profiles obtained using the IFA calibration method, while polarimetric profiles in the right panels were formed using the calibration method presented in Sect. 3, that uses the METM method of PSRCHIVE. All NUPPI observations centered at 1.484 GHz are shown. The observations were normalized to the maximum value of the total intensity.