Planck-LFI CPV: Phase Switch tuning and verification

Date Issued
2009
Author(s)
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Davis, Richard
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Wilkinson, Althea
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Franceschet, Cristian
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GREGORIO, Anna
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Leonardi, Rodrigo
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Lowe, Stuart
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Meinhold, Peter
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Mendes, Luis
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Poutanen,Torsti
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Tomasi, Maurizio
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Zonca, Andrea
Abstract
This document describes the activities performed during the first phase switch (PSW) tuning and verification test performed during CPV. The objective of this test, composed of two steps, is to find the optimal bias currents to the front-end phase switches that balance the wave amplitude in the two-phase switch states. An optimal balance has an impact on the receiver isolation, therefore the first part of the test (P_PVP_LFI_0004_01, namely tuning) was performed before the tuning of the front-end modules amplifiers. The second part (P_PVP_LFI_0004_02, namely verification) was performed after the tuning of the front-end modules to verify the impact on phase switch balancing of different amplifiers biases. The test was performed only on 30 and 44GHz RCAs as planned.
Volume
PL-LFI-PST-RP-065
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