LCU: the control unit dedicated for local oscillator subsystem in ESA HIFI/Herschel project

Piotr Orleański; Mirosław Ciechanowicz; Małgorzata Michalska; Witold Nowosielski; Mirosław Rataj; Marek Winkler

doi:10.1117/12.675028

26 April 2006 LCU: the control unit dedicated for local oscillator subsystem in ESA HIFI/Herschel project

Piotr Orleański, Mirosław Ciechanowicz, Małgorzata Michalska, Witold Nowosielski, Mirosław Rataj, Marek Winkler

Proceedings Volume 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV; 61590R (2006) https://doi.org/10.1117/12.675028
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 2005, Wilga, Poland

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.

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Piotr Orleański, Mirosław Ciechanowicz, Małgorzata Michalska, Witold Nowosielski, Mirosław Rataj, and Marek Winkler "LCU: the control unit dedicated for local oscillator subsystem in ESA HIFI/Herschel project", Proc. SPIE 6159, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments IV, 61590R (26 April 2006); https://doi.org/10.1117/12.675028

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