The BasicRX uses a balun (i.e. transformer) that cannot pass low frequencies. ________________________ Eugene Grayver, Ph.D. Aerospace Corp., Principal Engineer Tel: 310.336.1274 ________________________ ________________________________ From: Rob Kossler <rkossler@nd.edu> Sent: Monday, March 27, 2023 1:39 PM To: Eugene Grayver <eugene.grayver@aero.org> Cc: Robert McGwier <rwmcgwier@gmail.com>; Brian Padalino <bpadalino@gmail.com>; usrp-users <usrp-users@lists.ettus.com> Subject: Re: [USRP-users] Re: Wideband IQ Daughterboard Hi Eugene, I don't know why the basic Rx has a lower frequency listed. It seems inconsistent with other notes such as the following found here<https://kb.ettus.com/Selecting_a_RF_Daughterboard> Some USRP radio users elect to use an external front end providing upconversion, downconversion, amplification and filtering functionality. In these cases, the frontend often outputs an intermediate frequency (IF). It is also possible for the frontend to provide an analog, quadrature interface. In either case the BasicRX/BasicTX and LFRX/LFTX daughterboards are good candidates, as they provide a unity gain interface to the ADC(s) and DAC(s) of the USRP hardware. I have not tried so I can't confirm if it will work. I can only say that it was my understanding that the Basic Rx could be used for your specific application. Rob On Mon, Mar 27, 2023 at 12:08 PM Eugene Grayver <eugene.grayver@aero.org<mailto:eugene.grayver@aero.org>> wrote: Yes, as evidenced by UBX-160. X310 can stream 200 Msps complex, which is sufficient for 160 MHz of BW. ________________________ Eugene Grayver, Ph.D. Aerospace Corp., Principal Engineer Tel: 310.336.1274 ________________________ ________________________________ From: Robert McGwier <rwmcgwier@gmail.com<mailto:rwmcgwier@gmail.com>> Sent: Sunday, March 26, 2023 7:50 PM To: Brian Padalino <bpadalino@gmail.com<mailto:bpadalino@gmail.com>> Cc: Eugene Grayver <eugene.grayver@aero.org<mailto:eugene.grayver@aero.org>>; usrp-users <usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com>> Subject: Re: [USRP-users] Re: Wideband IQ Daughterboard Can the existing firmware support that bandwidth? The 10Gbps Ethernet can but I am not sure about the rest of the USRP. I own two of them and have never tried to do that. Bob On Wed, Mar 22, 2023 at 9:58 AM Brian Padalino <bpadalino@gmail.com<mailto:bpadalino@gmail.com>> wrote: You're right - I completely missed that part of the email. My apologies. Brian On Tue, Mar 21, 2023 at 7:12 PM Eugene Grayver <eugene.grayver@aero.org<mailto:eugene.grayver@aero.org>> wrote: Yes, as stated in the original post 'Basic-RX with a minimum of 1 MHz'. The DC is cutoff by the balun on the basicRX making it unsuitable for IQ. ________________________ Eugene Grayver, Ph.D. Aerospace Corp., Principal Engineer Tel: 310.336.1274 ________________________ ________________________________ From: Brian Padalino <bpadalino@gmail.com<mailto:bpadalino@gmail.com>> Sent: Tuesday, March 21, 2023 3:18 PM To: Eugene Grayver <eugene.grayver@aero.org<mailto:eugene.grayver@aero.org>> Cc: usrp-users <usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com>> Subject: Re: [USRP-users] Wideband IQ Daughterboard On Tue, Mar 21, 2023 at 6:12 PM Eugene Grayver <eugene.grayver@aero.org<mailto:eugene.grayver@aero.org>> wrote: Hello, I want to use an external IQ mixer with an external LO. My signal is 160 MHz wide, which fits nicely into the nominal complex 200 MHz Nyquist of the X310. Unfortunately the only daughterboards for direct access to the ADCs are LFRX which maxes out at 30 MHz, and the Basic-RX with a minimum of 1 MHZ. I am thinking of spinning a custom daughter board derived from LFRX with a wideband differential driver such as https://www.analog.com/media/en/technical-documentation/data-sheets/6406fc.pdf or alternatively just replacing the chip on an LFRX since these appear to be footprint compatible. Separately, I was looking at LFTX schematics and the part # for the amplifier is not specified. Can somebody at Ettus/NI save me some time and lookup that part #. Comments? Have you considered the BasicRX? https://www.ettus.com/all-products/basicrx/ https://files.ettus.com/schematics/basic_dbs/BasicRX.pdf Brian _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com> To unsubscribe send an email to usrp-users-leave@lists.ettus.com<mailto:usrp-users-leave@lists.ettus.com> -- Dr. Robert W McGwier, Ph.D. Affiliated Faculty, Virginia Tech Affiliated Faculty, University of Scranton Former ARDC Member of Board N4HY: ARRL, TAPR, AMSAT, EARC, CSVHFS Sky: AAVSO, Sky360, explorescu.org<http://explorescu.org>, Skyscrapers _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com> To unsubscribe send an email to usrp-users-leave@lists.ettus.com<mailto:usrp-users-leave@lists.ettus.com>