East Asian VLBI Network (EAVN)

Brief Summary of NSRT26 Receiving System

Figure 6 shows a flow diagram of the VLBI receiving system in NSRT26. NSRT26 has the receivers for 5 frequency bands, L (1.4 GHz), S/X (2.3/8.4 GHz), C (5 GHz), K (22 GHz), and Q (43 GHz), while NSRT26 joins in EAVN observations at only K-band in 2019A semester. The K-band receiver is cooled HEMT receivers with dual circular polarizers. The observable frequency range and the typical receiver noise temperature are shown in Table 4. The total system noise temperatures at K-band is typically 42 K. The RF signal is down-converted with three stages, and analog-digital conversion and digital filtering of the IF signal is conducted using either the Digital Baseband Converter (DBBC) system or the Chinese VLBI Data Acquisition System (CDAS).

Figure 5: Flow diagram of signals from receiver to recorder for TMRT65.

Figure 6: Flow diagram of signals from receiver to recorder for NSRT26.



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EAVN ( East Asia VLBI Network )