Re: Transmitter and Receiver on the same SDR

[Kyeong Su Shin]

Hello Oğuzhan:

Also, I think your "Signal Source" block is misconfigured. The "Frequency" of the "Signal Source" block is not the RF frequency of the signal, it is the baseband frequency of the signal (so it should be lower than the sampling rate in most cases).

The sine wave is probably aliased to 0 Hz, which is not well-transmitted by SDRs (real-world devices often cannot transmit or receive DC components well).

The gain level of the USRP source/sink blocks, as suggested by Dor, is probably the main culprit, though. If I recall correctly, USRP B200s have wide range of gain settings and is pretty much deaf at 0 dB.

Regards,

Kyeong su Shin

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보낸 사람: Oğuzhan Gedikli <ouzan_ts@hotmail.com> 대신 Discuss-gnuradio <discuss-gnuradio-bounces+ksshin=postech.ac.kr@gnu.org>
보낸 날짜: 2022년 5월 24일 화요일 오후 9:33
받는 사람: discuss-gnuradio@gnu.org <discuss-gnuradio@gnu.org>
제목: Transmitter and Receiver on the same SDR

 

Hello, I have USRP B200 and i use GNU Radio for design. I want to transmit a random signal (whatever, is'nt important for now) I am using the TX/RX port as transmitter and the RX2 port as receiver. I can transmit signal without any problems but i can't receive it from other port. I am sending screenshots to you. If you are help me, i would be glad. Thank you.