The linearity response of the Planck-LFI flight model receivers
A. Mennella, F. Villa, L. Terenzi, F. Cuttaia, P. Battaglia, M., Bersanelli, R.C. Butler, O. D'Arcangelo, E. Artal, R. Davis, M. Frailis, C., Franceschet, S. Galeotta, A. Gregorio, N. Hughes, P. Jukkala, D. Kettle,, V.-H. Kilpi\"a, M. Laaninen, P.M. Lapolla, R. Leonardi
TL;DR
This paper analyzes the linearity response of Planck-LFI receivers, focusing on signal compression at 30 and 44 GHz, and models the effects to ensure accurate in-flight calibration.
Contribution
It provides a detailed model of receiver linearity and compression, demonstrating minimal impact on calibration accuracy during flight.
Findings
Signal compression is characterized and modeled accurately.
Non-linearity effects on calibration are negligible.
The model aids in understanding receiver behavior during operation.
Abstract
In this paper we discuss the linearity response of the Planck-LFI receivers, with particular reference to signal compression measured on the 30 and 44 GHz channels. In the article we discuss the various sources of compression and present a model that accurately describes data measured during tests performed with individual radiomeric chains. After discussing test results we present the best parameter set representing the receiver response and discuss the impact of non linearity on in-flight calibration, which is shown to be negligible.
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