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## Modulation Signal Distributor for the RT-32 Radio Telescope

Transactions of IAA RAS, issue 49, 32–36 (2019)

Keywords: FPGA (Field Programmable Gate Array), digital backend, modulation signals, radiometric observations

### Abstract

This paper presents the Modulation Signal Distributor (MSD) development report. The device has been developed in order to distribute control signals from the Multifunctional Digital BackEnd (MDBE) to the modulators in the receivers of the RT-32 radio telescope. The MSD receives the encoded bit sequence messages about the modulator’s necessary technical state; this information is transmitted from the MDBE to the MSD by an optical fiber line. The MSD contains a FPGA chip that receives the signal from the MDBE, distributes it to 10 outputs and then these modulation signals go to the antenna receivers. The MSD provides a stable delay and the data integrity control which prevents inadvertent switching of the modulators in case of any problems in the transmission line. The paper describes the operation of the MSD, its structure and data transfer protocol.

### Citation

Text
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RIS
V. K. Ivanov, E. V. Nosov. Modulation Signal Distributor for the RT-32 Radio Telescope // Transactions of IAA RAS. — 2019. — Issue 49. — P. 32–36. @article{ivanov2019, abstract = {This paper presents the Modulation Signal Distributor (MSD) development report. The device has been developed in order to distribute control signals from the Multifunctional Digital BackEnd (MDBE) to the modulators in the receivers of the RT-32 radio telescope. The MSD receives the encoded bit sequence messages about the modulator’s necessary technical state; this information is transmitted from the MDBE to the MSD by an optical fiber line. The MSD contains a FPGA chip that receives the signal from the MDBE, distributes it to 10 outputs and then these modulation signals go to the antenna receivers. The MSD provides a stable delay and the data integrity control which prevents inadvertent switching of the modulators in case of any problems in the transmission line. The paper describes the operation of the MSD, its structure and data transfer protocol.}, author = {V.~K. Ivanov and E.~V. Nosov}, doi = {10.32876/ApplAstron.49.32-36}, issue = {49}, journal = {Transactions of IAA RAS}, keyword = {FPGA (Field Programmable Gate Array), digital backend, modulation signals, radiometric observations}, pages = {32--36}, title = {Modulation Signal Distributor for the RT-32 Radio Telescope}, url = {http://iaaras.ru/en/library/paper/1965/}, year = {2019} } TY - JOUR TI - Modulation Signal Distributor for the RT-32 Radio Telescope AU - Ivanov, V. K. AU - Nosov, E. V. PY - 2019 T2 - Transactions of IAA RAS IS - 49 SP - 32 AB - This paper presents the Modulation Signal Distributor (MSD) development report. The device has been developed in order to distribute control signals from the Multifunctional Digital BackEnd (MDBE) to the modulators in the receivers of the RT-32 radio telescope. The MSD receives the encoded bit sequence messages about the modulator’s necessary technical state; this information is transmitted from the MDBE to the MSD by an optical fiber line. The MSD contains a FPGA chip that receives the signal from the MDBE, distributes it to 10 outputs and then these modulation signals go to the antenna receivers. The MSD provides a stable delay and the data integrity control which prevents inadvertent switching of the modulators in case of any problems in the transmission line. The paper describes the operation of the MSD, its structure and data transfer protocol. DO - 10.32876/ApplAstron.49.32-36 UR - http://iaaras.ru/en/library/paper/1965/ ER -