Dear GNU Radio Community,
I am working on VOR signal reception using the USRP N210 in GNU Radio Companion. I am encountering an issue with signal reception after applying a low pass filter at 200 Hz. The desired 90 Hz, 130 Hz, and 150 Hz signals are not visible in the frequency spectrum. Instead, a 40 Hz signal dominates, and the 90 Hz signal appears suddenly with low gain and then disappears.
Project Details:
- Daughterboard: WBX (default)
- Antenna: VERT900 (TX/RX)
- Modulation: Message signals of 90 Hz and 120 Hz are modulated on a 1.02 kHz subcarrier and then further modulated on a 1.1 GHz carrier.
This modulated signal is transmitted from a signal generator using the same antenna and received by the USRP N210 in GRC. The signal spectrums are attached.
Could you please help me identify any potential issues or missing steps in my setup?
Thank you for your assistance.
Best regards,
Muhammad Anas
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