RFI Management for Single Dish Radio Astronomy at NRAO Green Bank. Some Considerations. Single dish RA is more vulnerable to RFI than array configurations. Protection and source-mitigation are the preferred options but not always possible.
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Receive (Rx) Antenna
Equipment Under Test (EUT)
PowerTx(dBm) = Pmeasured(dBm) + Lspace(dB) – Gantenna(dB) – Gamplifier(dB) + Lcables(dB)
~3:1 or 5dB SNRatio
…but anechoic chamber prediction said worst-case emissions exceed ITU-R line limit by 22dB....17dB discrepancy????
60s integration time of test vs. ITU-R line limitassumed 2000s integration:
10Log(60/2000) = -15dB (close enough)