Ah! The situation is different then! Chances are that the same bandwidth will still fit through USB2, and since USB3 is backwards compatible: You don't even have a problem :) Just connect your B200 as you did your HackRF.
Note that full-duplex might need more USB bandwidth than half, but I guess the easiest way to figure that out is to try :) Best regards, Marcus On Sun, 2018-04-29 at 16:44 -0600, Brian Gieryk wrote: > I am currently running a HackRF on a Pi 3B, doing multi frequency > NBFM RX, VHF-Hi and UHF (monitoring multiple frequencies on large > fires). > > Would like a single radio solution (HackRF can not be both source and > sink in GNUradio, so 2 boxes must be used). > > Brian > KE6IYC > > > Sent from my iPhone > > > On Apr 29, 2018, at 16:14, Marcus Müller <marcus.muel...@ettus.com> > > wrote: > > > > Hi Brian! > > > > It probably won't work great: since USB and ethernet are > > fundamentally > > different, the round-trip delay won't be of any fun, and I really > > don't > > see why you should spend your money on a network-connected USB3 hub > > (wasn't even aware something like that existed!) to couple a > > computer > > with USB2 to a USB3 device. > > > > You should really directly opt for a computer with a USB3 port. > > Also, > > Software Defined Radio at rates that require USB3 (instead of only > > USB2, since you can also use USB2 if your sampling rates are below > > ca > > 10 MS/s) usually means a high CPU demand – not sure that the Pi3 is > > the > > universally best choice here. (I want so say that: very likely it's > > not.) > > > > So, to be honest: simply start with a decent desktop or laptop PC, > > preferably running Linux; you might already be using one, so this > > is a > > zero cost option initially. Whatever you design there can (unless > > you > > do something architecture-specific) be ported to an ARM like that > > in > > the Pi easily (if necessary at all), but you're not subject to the > > computational limitations of the Pi while you design your system. > > When > > you've shown it works, you can try to make it work on a Pi - > > optimize > > the things that are bottlenecks and so on. > > > > But: you surely wouldn't be considering the Pi up front if you > > didn't > > have an application for such a device: What are you working on? Can > > we > > help you with feedback, suggestions or just encouragement? > > > > Best regards, > > Marcus > > > > > On Sun, 2018-04-29 at 15:54 -0600, Brian Gieryk via USRP-users > > > wrote: > > > Forgive me, please, if this has been asked before, but I find no > > > way > > > to search the archives. > > > > > > I am currently shopping for a B200/B200 mini for experimenting. > > > > > > I will be using a Raspberry Pi 3B+ (gigabit Ethernet), GNUradio, > > > and > > > am wondering if anyone has used/tried network attached USB hubs > > > to > > > use a USB3 device with a computer that only has USB2 ports? > > > > > > Good bad or indifferent, does it work? > > > > > > Thank you in advance, > > > > > > Brian > > > KE6IYC > > > > > > > > > > > > Sent from my iPhone > > > _______________________________________________ > > > USRP-users mailing list > > > USRP-users@lists.ettus.com > > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.co > > > m _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
