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Proceedings Paper

A new phase-lock algorithm for the ALMA receivers
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Paper Abstract

In this work, a new phase-lock algorithm for the Local Oscillator system of the ALMA receiver is presented. This new algorithm replaced the look-up table based scheme used originally in the ALMA receivers. In this new scheme all variables are adjusted dynamically on each lock attempt, except for the YIG oscillator frequency limits. The new developed is able to correct aging and non-linearity of the YIG oscillators used in the LO system. The provided solution reduces the locking time in up to a factor of ten, improving lock success rate up to 99.91%.

Paper Details

Date Published: 24 September 2012
PDF: 11 pages
Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 845232 (24 September 2012); doi: 10.1117/12.926777
Show Author Affiliations
Juan Pablo Garcia, ALMA Observatory (Chile)
Claudio Alvarez Barros, ALMA Observatory (Chile)


Published in SPIE Proceedings Vol. 8452:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI
Wayne S. Holland, Editor(s)

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