Hi Henry, On 2022-08-04 06:05 +0000, [email protected] wrote: > I design a system on GNU Radio with USRP and coded it in Python. I am > hopping frequency. Then I restart this process. I save all max. value > at different frequencies. I am sharing datas with you. All data you > can see in this document I take connection with cable. I mean I > connect TX port to RX port with cable. I know possible dangers. > > My problem is I expect all datas are same even they don’t be same > frequencies. I would not expect the dB difference between 100MHz and > 6Ghz almost 40dB.
IMO, this is expected. If we consider the Friis transmission equation, it tells us that the ratio between the power received and transmitted decreases in 20⋅log_10(f) [dB]. From 100 MHz fc to 6 GHz fc, we loose ≈ 36 dB. Regards -- Cédric Hannotier _______________________________________________ USRP-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
