Hi all, Using RFX1800 daughterboard and two computer, I sent a signal from one usrp to the other. The signal's frequency is 100KHz and usrp sink at 1.7GHz. Also usrp Source is at 1.7Ghz. Sample Rate is chosen 1M so decimation 64 and interpolation 128. Usrp sink gain is useles I guess, because I change it but nothing change at the receiver part. ( when signal's amplitude is 1). Using a multiply constant(values : 10,20,30....etc) obtain increase of gain at the receiver part. Anyway this is not a big problem, My problem is when I transmit a signal at 100kHz, (no use Multiply constant) ,observe two signals which is transmitted signal at 100Khz and the other is at 0 Hz. And this signal (at 0Hz) has 45-50dB gain and transmited signal has 10 dB gain. Without a multiply constant I couldn't observe transmitted signal. Do you know why I observe an extra signal at 0Hz.
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