Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 122597 10.12737/stp-122202614 cvvckw Results of current research Results of current research Results of current research Modern digital backend systems for the radio telescopes of the Quasar VLBI network Modern digital backend systems for the radio telescopes of the Quasar VLBI network https://orcid.org/0000-0002-9870-3489 Маршалов Дмитрий Александрович Marshalov Dmitriy Aleksandrovich marshalov@iaaras.ru

кандидат технических наук;

candidate of technical sciences;

 https://orcid.org/0000-0003-1577-9638 Гренков Сергей Александрович Grenkov Sergey Aleksandrovich grenkov@iaaras.ru

кандидат технических наук;

candidate of technical sciences;

 Бердников Антон Сергеевич Berdnikov Anton Sergeevich as.berdnikov@iaaras.ru https://orcid.org/0000-0001-9872-4215 Федотов Леонид Васильевич Fedotov Leonid Vasilevich fedotov@iaaras.ru

доктор технических наук;

doctor of technical sciences;

 Институт прикладной астрономии РАН Санкт-Петербург Россия Institute of Applied Astronomy RAS Saint Petersburg Russian Federation Институт прикладной астрономии РАН Санкт-Петербург Россия Institute of Applied Astronomy RAS Saint Petersburg Russian Federation Институт прикладной астрономии РАН Санкт-Петербург Россия Institute of Applied Astronomy RAS Saint Petersburg Russian Federation Институт прикладной астрономии РАН Санкт-Петербург Россия Institute of Applied Astronomy RAS Saint Petersburg Russian Federation 12 2 119 124 07 11 2025 16 02 2026 https://naukaru.ru/en/nauka/article/122597/view

This paper presents modern digital signal conversion systems used for radio telescopes of the Quasar VLBI network. We briefly trace the evolution of signal conversion equipment from analog and hybrid solutions to a multifunctional digital backend system (MDBE) providing fully digital processing of received signals over a wide frequency range. The architecture, main technical characteristics, and operating modes of MDBE are described, along with specific features of its application on the RT-13 and RT-32 radio telescopes. It is shown that the use of MDBE enables unification of signal conversion hardware, supports both broadband and narrowband very long baseline interferometry modes, and allows spectral and radiometric observations to be implemented within a single hardware–software platform. We give examples of practical applications demonstrating the system’s efficiency, stability of signal path parameters, and compatibility with national and international data recording and transmission standards. Prospects for further development of the system and expansion of the range of scientific and applied problems are also discussed.

This paper presents modern digital signal conversion systems used for radio telescopes of the Quasar VLBI network. We briefly trace the evolution of signal conversion equipment from analog and hybrid solutions to a multifunctional digital backend system (MDBE) providing fully digital processing of received signals over a wide frequency range. The architecture, main technical characteristics, and operating modes of MDBE are described, along with specific features of its application on the RT-13 and RT-32 radio telescopes. It is shown that the use of MDBE enables unification of signal conversion hardware, supports both broadband and narrowband very long baseline interferometry modes, and allows spectral and radiometric observations to be implemented within a single hardware–software platform. We give examples of practical applications demonstrating the system’s efficiency, stability of signal path parameters, and compatibility with national and international data recording and transmission standards. Prospects for further development of the system and expansion of the range of scientific and applied problems are also discussed.

 radio telescope radio astronomical equipment signal conversion system digital signal processing radio telescope radio astronomical equipment signal conversion system digital signal processing

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