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@InProceedings{rutkowski:icalepcs2019-mopha124,
author = {I. Rutkowski and K. Czuba and M.G. Grzegrzółka},
title = {{Local Oscillator Rear Transition Module for 704.42 MHz LLRF Control System at ESS}},
booktitle = {Proc. ICALEPCS'19},
pages = {516--519},
paper = {MOPHA124},
language = {english},
keywords = {controls, LLRF, monitoring, cavity, operation},
venue = {New York, NY, USA},
series = {International Conference on Accelerator and Large Experimental Physics Control Systems},
number = {17},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2020},
issn = {2226-0358},
isbn = {978-3-95450-209-7},
doi = {10.18429/JACoW-ICALEPCS2019-MOPHA124},
url = {https://jacow.org/icalepcs2019/papers/mopha124.pdf},
note = {https://doi.org/10.18429/JACoW-ICALEPCS2019-MOPHA124},
abstract = {This paper describes the specifications, architecture, and measurements’ results of the MTCA-compliant Local Oscillator (LO) Rear Transition Module (RTM) board providing low phase noise clock and heterodyne signals for the 704.42 MHz Low Level Radio Frequency (LLRF) control system at the European Spallation Source (ESS). The clock generation and LO synthesis circuits are based on the module presented at ICALEPCS 2017. The conditioning circuits for the input and output signals must simultaneously achieve the desired impedance matching, spectral purity, output power as well as the phase noise requirements. The reference conditioning circuit presents an additional challenge due to input power range being significantly wider than the output range. The circuits monitoring the power levels of critical signals and voltages of supply rails for remote diagnostics as well as the programmable logic devices used to set the operating parameters via Zone3 connector are described.},
}