Arash, While Marcus’ response is certainly correct it does little in providing a practical answer to your question.
I use an X310 with TwinRX daughterboards and have found that it is inadvisable to use input levels to the TwinRX daughterboard greater than -30dBm because higher levels than that tend to result in distortion/compression issues. I don’t know what the damage threshold is for the input ports on the TwinRX daughterboard. For my radio astronomy applications I use an input level of -60dBm and that seems to work quite well for me. I don’t know if other daughterboards for the X310 have different input-level behavior. Perhaps this response will give you ball park answers that you can use. Regards, Joe > On Jul 14, 2020, at 3:53 AM, Marcus Müller via USRP-users > <usrp-users@lists.ettus.com> wrote: > > Hi Arash, > > The input power is not defined by the motherboard (X310) you're using, > but by the analog frontend daughterboard (like TwinRX, UBX-160, SBX,…) > you've plugged in to these. > > On 14.07.20 11:38, Arash Jafari via USRP-users wrote: >> National Instrument congratulation!! very bad documentation. > > … > > Best regards, > Marcus Müller > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com