Guys, thank you so much for your support, you are awesome! Now I feel myself as complete idiot. I removed GPSDO. Disconnected the 10MHz clock, by USRP is still working and it seems to be on more or less correct correct frequency. I clearly can see the input tone on fft utility.
Is there some other clock source I'm unaware off? Can I see the ADF4001 lock status? Here is the output I'm getting: linux; GNU C++ version 5.3.1 20151219; Boost_105800; UHD_003.009.002-0-unknown -- Loading firmware image: /usr/share/uhd/images/usrp_b200_fw.hex... -- Detected Device: B210 -- Loading FPGA image: /usr/share/uhd/images/usrp_b210_fpga.bin... -- Operating over USB 3. -- Detecting internal GPSDO.... No GPSDO found -- Initialize CODEC control... -- Initialize Radio control... -- Performing register loopback test... pass -- Performing register loopback test... pass -- Performing CODEC loopback test... pass -- Performing CODEC loopback test... pass -- Asking for clock rate 16.000000 MHz... -- Actually got clock rate 16.000000 MHz. -- Performing timer loopback test... pass -- Performing timer loopback test... pass -- Setting master clock rate selection to 'automatic'. -- Asking for clock rate 32.000000 MHz... -- Actually got clock rate 32.000000 MHz. -- Performing timer loopback test... pass -- Performing timer loopback test... pass On Fri, Mar 9, 2018 at 9:09 PM Sailor Jerry <sailorje...@scmarinetech.com> wrote: > That would explain it , thanks :-) > > On Fri, Mar 9, 2018 at 9:07 PM Nick Foster <bistrom...@gmail.com> wrote: > >> I uh what? I don't see why that would be the case. The whole reason U103 >> exists is to switch between a GPSDO (if present) and an external reference. >> >> You might wait for the official Ettus response for this if you don't want >> to take responsibility for blowing it up, but I drew the schematic and I >> say you're fine. >> >> Incidentally, very early prototypes of the B200 used a neat PIN diode >> switch ring which would allow outputting the GPSDO signal as well as using >> either the reference port or GPSDO as a clock input. I can't remember why >> it didn't make it into production, but one side effect would be that if >> misconfigured, you could damage hardware. Maybe that was it. ;) >> >> Nick >> >> On Fri, Mar 9, 2018 at 8:48 PM Marcus D. Leech <mle...@ripnet.com> wrote: >> >>> 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> >>> 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> 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. =) >>>>> >>>>> Nick >>>>> >>>>> Your 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> 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> 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 >>>>>>> > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> USRP-users mailing >>>>>> listUSRP-users@lists.ettus.comhttp://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 >>>>>> >>>>> >>>>> _______________________________________________ >>>>> USRP-users mailing list >>>>> USRP-users@lists.ettus.com >>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>>>> >>>> >>>> >>>
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