On 03/09/2018 11:44 PM, Sailor Jerry wrote:
Thanks. Shall I ignore that sentence from USRP B2x0 Series manual "The B200 and B210 cannot support an external 10 MHz reference if a GPSDO is already present on the motherboard. If an external 10 MHz is to be used, the GPSDO needs to be physically removed from the device beforehand."?
I think that advice is still correct, but I cannot remember why. Nick?
On Fri, Mar 9, 2018 at 8:32 PM Marcus D. Leech <mle...@ripnet.com <mailto:mle...@ripnet.com>> wrote:On 03/09/2018 11:25 PM, Sailor Jerry wrote:Would be happy to restore it to original condition :-) I'm using the uhd_rx_cfile to capture the data. How do I control U103 from this app? I don't see any command line arguments for that? Do I need to rebuild it?You'd have to add that, inserting a call to set_clock_source() at an appropriate place. The example apps (and this is one) don't necessarily expose all available features.On Fri, Mar 9, 2018 at 8:08 PM Marcus D. Leech via USRP-users <usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>> wrote: On 03/09/2018 08:11 PM, Nick Foster wrote:It's a slick mod though. See the zero-ohm resistor bridging U103 pins 1 and 3? Remove it, and you'll return the B210 to factory standard. Assuming no other modifications have also been made. =) NickYour eyes are much better than mine....On Fri, Mar 9, 2018 at 4:31 PM Marcus D. Leech via USRP-users <usrp-users@lists.ettus.com <mailto:usrp-users@lists.ettus.com>> wrote: On 03/09/2018 07:22 PM, Sailor Jerry via USRP-users wrote:HI Marcus, I see your point and also saw the schematic. The previous owner told me that this particular board was modified to have 10 MHz be brought out to the outside connector. I did verify it with the scope and indeed saw the 10 MHz coming out. I don't know if it's one of the standard factory options or just some custom modifications (the board has Olifantasia label on it). Will take a closer look at pins 3 and 1 of U103 as you suggest. If they are bridged indeed then I guess simple removal of GPSDO would do the trick.That is NOT a factory-standard option.On Fri, Mar 9, 2018 at 4:10 PM Marcus Müller <marcus.muel...@ettus.com <mailto:marcus.muel...@ettus.com>> wrote: Dear Sailor Jerry, I'm not sure I'm following here: The 10 MHz connector is hardware-wise connected only to inputs, not to anything that can output anything; compare the schematic[1] on page 1. So, I'm pretty certain your device can't be condigured to have the 10 MHz connector be an output for anything. Can you maybe describe the problem you're having? Best regards, Marcus [1] https://files.ettus.com/schematics/b200/b210.pdf On Fri, 2018-03-09 at 23:51 +0000, Sailor Jerry via USRP-users wrote: > I inherited the B210 board that has the 10 MHz connector configured > as an output. I wonder if anyone is aware of this configuration and > if it's possible to reconfigure it to accept the external 10 MHz > input. > > My current plan is simply remove GPSDO and hope for the best. > > Attached are two pictures of my board. One is with GPSDO inserted and > another one with GPSDO removed. > > Thanks a lot! > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com <mailto: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 <mailto: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 <mailto: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 <mailto:USRP-users@lists.ettus.com> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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