Hi all, We have a X310 SDR with release version 3.14.1.1 of UHD. We are obtaining IQ samples from 4 channels. My question is, X310 includes Automatic Gain Control in samples depending on signal power? I say that because in the datasheet I couldn't find any information about that but I observed differences in power level depending on if SDR gives samples in int or in float format. Clarification: When SDR gives samples in int format and after I'm interpreting that sample the signal power is different than if I obtain samples in float format. Best regards Sergio -- *INFORMÁTICA EL CORTE INGLÉS* *Sergio Parreño Gomez* *Área Seguridad Electrónica - DEFENSA* _________________________________________________________________________________________________________________ M. +34 671 746 106 Travesía de Costa Brava, 4 Mirasierra | 28034 Madrid | España *www.iecisa.com <http://www.iecisa.com/>* -- Este mensaje, y en su caso, cualquier fichero anexo al mismo, puede contener información confidencial, siendo para uso exclusivo del destinatario, quedando prohibida su divulgación copia o  distribución a terceros sin la autorización expresa del remitente. Si Vd. ha recibido este mensaje erróneamente, se ruega lo  notifique al remitente y proceda a su borrado. Gracias por su colaboración. This message (including any attachments) may contain confidential information. It is intended for use by the recipient only. Any dissemination, copying or distribution to third parties without the express consent of the sender is strictly prohibited. If you have received this message in error, please delete it immediately and notify the sender. Thank you for your collaboration.

On 11/22/2019 02:38 AM, Sergio Parreño Gómez via USRP-users wrote: > Hi all, > We have a X310 SDR with release version 3.14.1.1 of UHD. We are > obtaining IQ samples from 4 channels. > My question is, X310 includes Automatic Gain Control in samples > depending on signal power? I say that because in the datasheet I > couldn't find any information about that but I observed differences in > power level depending on if SDR gives samples in int or in float format. > > Clarification: When SDR gives samples in int format and after I'm > interpreting that sample the signal power is different than if I > obtain samples in float format. > Best regards > Sergio > > The float values will be scaled into {-1.0,+1.0}. The "wire" format will always be in 16-bit complex short ints, so the SDR itself has no way of knowing what host-side format you're using. I don't think ANY of the daugter-cards that are normally used with X310 have hardware AGC of any kind, and the DSP engine in the X310 doesn't implement any AGC of any kind.