STRINGHETTI, LUCALUCASTRINGHETTICUTTAIA, FRANCESCOFRANCESCOCUTTAIAMENNELLA, ANIELLOANIELLOMENNELLASANDRI, MAURAMAURASANDRI2024-06-242024-06-242007http://hdl.handle.net/20.500.12386/35222This document has been issued in the frame of ASI contract that has been released for the activities of Planck-LFI Phase E2 Scope of this document is to give a description of a new and unexpected feature found during the warm tests at system level in the LFI FFT spectrum of the scientific data. The scope of the document is two folds - Describe the feature so to open a dedicated NCR - Describe a proposal of a dedicated test in order to characterize the featureELETTRONICOenResearch reportFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_17 Instrumentation – telescopes, detectors and techniques