Properties of ILT J163035.93+355042.5/PSR J1630+3550, where the panels show the following (top to bottom). (1) LoTSS image at a centre frequency of 144 MHz with a 20″ resolution, contours show total intensity starting at 0.5 mJy beam⁻¹ and increase by factors of 2, and colours show fractional linear polarisation with a peak of 32%. The beam size is shown at the lower left corner. (2) Faraday spectrum (original – grey dashed line; RM CLEANed – blue line) computed from RM GRID processing using the LoTSS polarisation image data. The red cross shows the peak at 8.65 rad m⁻². (3) Folded polarisation pulse profile from a 20-min observation at 149 MHz with 78 MHz bandwidth and 512 pulse profile bins. Lower panel: normalised flux density (arbitrary units) for total intensity (Stokes I, black line), linear polarisation (L, red dashed line), and circular polarisation (Stokes V, blue dotted line). Upper panel: polarisation position angle (arbitrary average offset from 0 deg). (4) Faraday spectrum (original – grey line; RM CLEANed – black line) computed using PSR J1630+3550 pulsar data. The grey dashed line shows the RM CLEAN component at 9.486 ± 0.025 rad m⁻², prior to the ionospheric RM subtraction.