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Proceedings Paper

LCU: the control unit dedicated for local oscillator subsystem in ESA HIFI/Herschel project
Author(s): Piotr Orleański; Mirosław Ciechanowicz; Małgorzata Michalska; Witold Nowosielski; Mirosław Rataj; Marek Winkler
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Paper Abstract

The Local Oscillator Subsystem is a part of the HIFI (Heterodyne Instrument for Far Infrared) project, an infrared heterodyne instrument for astronomical observations on the ESA satellite HERSCHEL. The Local Oscillator Subsystem (LO), provides the signals (480 to 1910 GHz) to the fourteen HIFI input mixers. The subsystem consists of three assemblies: the synthesizer unit (LSU assembly) generates the reference signals in K/Ka Bands, the signals are then distributed to 14 sets of amplifiers and multipliers (LOU assembly. The Local Oscillator Control Unit (LCU assembly) provides the main interface between LO and HIFI/Herschel power and telemetry systems. The unit supplies LO, decodes the HIFI macro-commands, programs and monitors the LSU/LOU parameters and finally controls the operation of the whole LO. This paper presents the general overview of the LO Subsystem and LCU unit. The authors focus on the reliability aspects of the LCU. The methods of biasing, in a "safe" way, of the sensitive microwave components (hardware realization and software procedures) are described in more detailed form.

Paper Details

Date Published: 26 April 2006
PDF: 6 pages
Proc. SPIE 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 61590R (26 April 2006); doi: 10.1117/12.675028
Show Author Affiliations
Piotr Orleański, Space Research Ctr. (Poland)
Mirosław Ciechanowicz, Max-Planck-Inst. for Radioastronomie (Germany)
Małgorzata Michalska, Space Research Ctr. (Poland)
Witold Nowosielski, Space Research Ctr. (Poland)
Mirosław Rataj, Space Research Ctr. (Poland)
Marek Winkler, Space Research Ctr. (Poland)

Published in SPIE Proceedings Vol. 6159:
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV
Ryszard S. Romaniuk, Editor(s)

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