Hi, > > From: "Marcus D. Leech" <[email protected]> > > On 11/05/2020 06:42 PM, Lukas Haase via USRP-users wrote: > > > Hi, > > > > > > I m studying: > > > > > > https://files.ettus.com/performance_data/ubx/UBX-without-UHD-corrections.pdf > > > [...] > > > Would be great if someone could confirm. > > > [...] > > > > The only way you can relate the dB values in your FFT display to > > power-as-seen-at-the-RF-connector is using an external calibration source, > > and you'll have to do this exercise over your entire expected > > operating-parameter space. RF analog components will NOT provide exacty > > the same gain/loss levels across their entire operating range. > > Yes, I am aware of that but my question related specifically to > https://files.ettus.com/performance_data/ubx/UBX-without-UHD-corrections.pdf > because I want to sanity-check my measurements (and I want to know how much > off I am compared to the figures).
The reason why I am asking about this is because I would like to cross-check my measurements. My original question was about RX gain but it actually also relates to TX gain. With an X310 and UBX-160, TX Gain=0 and sending out a full-scale sinusoid at 915MHz, I measure approx. -2.5dBm. This is not consistent at all with the file above (assuming I interpret how "gain" is defined correctly, hence my original question). Would anyone with an UBX-160 be so kind to confirm/disconfirm which power level I would expect to see? (Preferably at 915MHz with TXgain=0 and full-scale sinusoid but I'm happy with any other configuration that I can x-check). Thank you! Lukas _______________________________________________ USRP-users mailing list [email protected] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
