Hello everybody, Does anybody know what is the maximum input power level of USRP-X310 in RX modus? National Instrument congratulation!! very bad documentation. Kind regards, Arash. -- Dipl.-Ing. Arash Jafari Phone: +43 650 844 3617 E-mail: arash.jafari.telecom@gmail.com

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

On 07/14/2020 05:53 AM, Marcus Müller via USRP-users 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. > For example, see the "Care and Handling" for the SBX here: https://kb.ettus.com/SBX_Getting_Started_Guides#Proper_Care_and_Handling And for the TwinRx https://kb.ettus.com/TwinRX_Getting_Started_Guides#Proper_Care_and_Handling

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

Arash, Marcus L.’s response has some definitive info in the links. For example, in the TwinRX link it is stated: > Never apply more than +10 dBm of power into any RF input. So there you have it. Thanks for the details Marcus. Regards, Joe > On Jul 14, 2020, at 7:55 AM, Marcus D. Leech via USRP-users <usrp-users@lists.ettus.com> wrote: > > On 07/14/2020 05:53 AM, Marcus Müller via USRP-users 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. >> > For example, see the "Care and Handling" for the SBX here: > > https://kb.ettus.com/SBX_Getting_Started_Guides#Proper_Care_and_Handling > > And for the TwinRx > > https://kb.ettus.com/TwinRX_Getting_Started_Guides#Proper_Care_and_Handling > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

Joe: The input levels that cause distortion vary quite a bit from daughtercard to daughtercard, and even within a daughtercard there will be variability depending on frequency. The performance data can be consulted for this: https://files.ettus.com/performance_data/ What you’re looking for is IP3 and P1dB data. But “damage limits” are given Sent from my iPhone > On Jul 14, 2020, at 10:17 AM, Joe Martin <k5so@k5so.com> wrote: > > Arash, > > Marcus L.’s response has some definitive info in the links. For example, in the TwinRX link it is stated: > >> Never apply more than +10 dBm of power into any RF input. > > So there you have it. Thanks for the details Marcus. > > Regards, > > Joe > >> On Jul 14, 2020, at 7:55 AM, Marcus D. Leech via USRP-users <usrp-users@lists.ettus.com> wrote: >> >>> On 07/14/2020 05:53 AM, Marcus Müller via USRP-users 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. >>> >> For example, see the "Care and Handling" for the SBX here: >> >> https://kb.ettus.com/SBX_Getting_Started_Guides#Proper_Care_and_Handling >> >> And for the TwinRx >> >> https://kb.ettus.com/TwinRX_Getting_Started_Guides#Proper_Care_and_Handling >> >> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >

Marcus: Yes. Thanks. As I said. Regards, Joe > On Jul 14, 2020, at 8:29 AM, Marcus D Leech <patchvonbraun@gmail.com> wrote: > > Joe: > > The input levels that cause distortion vary quite a bit from daughtercard to daughtercard, and even within a daughtercard there will be variability depending on frequency. > > The performance data can be consulted for this: > > https://files.ettus.com/performance_data/ <https://files.ettus.com/performance_data/> > > What you’re looking for is IP3 and P1dB data. > > But “damage limits” are given > Sent from my iPhone > >> On Jul 14, 2020, at 10:17 AM, Joe Martin <k5so@k5so.com> wrote: >> >> Arash, >> >> Marcus L.’s response has some definitive info in the links. For example, in the TwinRX link it is stated: >> >>> Never apply more than +10 dBm of power into any RF input. >> >> So there you have it. Thanks for the details Marcus. >> >> Regards, >> >> Joe >> >>> On Jul 14, 2020, at 7:55 AM, Marcus D. Leech via USRP-users <usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>> wrote: >>> >>> On 07/14/2020 05:53 AM, Marcus Müller via USRP-users 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. >>>> >>> For example, see the "Care and Handling" for the SBX here: >>> >>> https://kb.ettus.com/SBX_Getting_Started_Guides#Proper_Care_and_Handling <https://kb.ettus.com/SBX_Getting_Started_Guides#Proper_Care_and_Handling> >>> >>> And for the TwinRx >>> >>> https://kb.ettus.com/TwinRX_Getting_Started_Guides#Proper_Care_and_Handling >>> >>> >>> _______________________________________________ >>> USRP-users mailing list >>> USRP-users@lists.ettus.com >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>