Marcus OK Thanks very much. Appreciate the help. Larry On 4/13/2020 2:11:00 PM, Marcus D Leech <patchvonbr...@gmail.com> wrote: An N210 with an LFRX card will suit your needs.
You could also consider a B200 with an external upconverter. Sent from my iPhone > On Apr 13, 2020, at 1:59 PM, Larry Dodd via USRP-users wrote: > > Sam Or Anyone, > My requirement is for 15 MHz bandwidth for monitoring 15 to 30 MHz. No > demodulation required. I’m confused as to which USRP unit would work for this > requirement. Any help will be appreciated. I don’t mind the cost but don’t > want to get one that won’t fit my requirement. It will be for monitoring > Jupiter storms and solar flares. Thanks. > Larry, K4LED > >> On Apr 13, 2020, at 12:20 PM, usrp-users-requ...@lists.ettus.com wrote: >> >> Send USRP-users mailing list submissions to >> usrp-users@lists.ettus.com >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> or, via email, send a message with subject or body 'help' to >> usrp-users-requ...@lists.ettus.com >> >> You can reach the person managing the list at >> usrp-users-ow...@lists.ettus.com >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of USRP-users digest..." >> >> >> Today's Topics: >> >> 1. Re: UBX 10-500 MHz Question (Marcus M?ller) >> >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Mon, 13 Apr 2020 14:48:08 +0200 >> From: Marcus M?ller >> To: usrp-users@lists.ettus.com >> Subject: Re: [USRP-users] UBX 10-500 MHz Question >> Message-ID: <1670730f-772e-0818-8e3a-825fee7dc...@ettus.com> >> Content-Type: text/plain; charset=utf-8 >> >> Hi Bob, hi Sam, >> >> top of my head, UBX-160 doesn't even have adjustable bandwidth >> (basically, of the modern devices, only AD9xxx-based systems have). So, >> yeah, you'll always get a two-sided84 MHz analog bandwidth (that's how >> you get 160 MHz in complex baseband). You'll notice when oversampling at >> 200 MS/s that analog filters are quite a bit worse than what's >> relatively easy to do in digital filtering in an FPGA at these rate. >> >> On classic Gen-3 DDC chain (I do think that's the same for the newer >> RFNoC chain), yes, there's two 2-decimating half-band FIRs with upwards >> of 40 taps, and a CIC to do the rest of the decimation. So, if you use a >> sampling rate that divides the master clock rate by 4, you get two HBs, >> if it doesn't divide by 4, but by 2, you still get one of these nicer >> HBs, and for odd factors, you'll fully have to rely on the CIC. That's >> not necessarily terrible, but CICs do have sinc?-y shape, so that's a >> bit of rolloff at the edges. >> >> Cheers, >> Marcus >>>> On 10.04.20 05:44, Sam Reiter via USRP-users wrote: >>> Bob, >>> >>> The 84MHz bandwidth constraint is because of the analog bandpass filter >>> [1] on the UBX's RX signal path [2]. I'd guess that UHD will yell at you >>> if you feed in an invalid bandwidth, but I've never tried it. If I >>> remember correctly, you can sample at rates that aren't an even division >>> of the MCR, you'll just end up using a CIC filter that causes rolloff in >>> your spectrum [3]. >>> >>> - Sam >>> >>> [1]?https://www.mouser.com/datasheet/2/412/55916-1504717.pdf >>> [2]?https://files.ettus.com/schematics/ubx/UBX-160_revE.pdf >>> [3]?https://witestlab.poly.edu/blog/why-does-my-received-spectrum-droop-at-the-edges/ >>> >>> On Wed, Apr 8, 2020 at 4:49 PM Tillson, Bob (US) via USRP-users >>> > wrote: >>> >>> so with the UBX-160 on an X310, there is the following caveat:____ >>> >>> __?__ >>> >>> * The UBX 160 transmitter path has 160 MHz of bandwidth throughout >>> the full frequency range of the device; the receiver path has 84 MHz >>> of bandwidth for center frequencies from 10 MHz to 500 MHz.____ >>> >>> __?__ >>> >>> I guess my question is how does this manifest itself?____ >>> >>> __?__ >>> >>> If I ask for 100 MHz of BW, do I get 84 or does it fail?____ >>> >>> __?__ >>> >>> How would I get 84 given the requirement of sample rate be an even >>> divisor of 200 MHz clock?____ >>> >>> __?__ >>> >>> If I wanted 100 in that range, would there be any way to get it from >>> a single channel in that band?? Most other cards don?t seem to have >>> the BW in that range.____ >>> >>> __?__ >>> >>> Thanks,____ >>> >>> _______________________________________________ >>> 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 >>> >> >> >> >> ------------------------------ >> >> Subject: Digest Footer >> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> >> >> ------------------------------ >> >> End of USRP-users Digest, Vol 116, Issue 9 >> ****************************************** > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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