On 9/11/21 12:11 AM, Marcus D. Leech wrote: > On 2021-09-10 6:03 p.m., msfu wrote: >> hi there, >> >> >> i am trying to get my GPS to work. >> >> setup is a b210, external pll-gpsdo bg7tbl connected to a nmea0183 >> anteńna and a vk-172 USB-GPS-mouse. >> >> i can get data from the usb receiver but in cgps there is no PPS and no >> 3D Fix. > Given that this is not the "please help me debug my GPS" mailing list > I'm not sure > that we'll be able to help you with CGPS here. > >> >> Now the question: can i activate my usrp to communicate with the >> external Clock? everytime im doing uhd_usrp_probe there is a lock on the >> gps. what can i do? > Does your B210 have a built-in GPS? If uhd_usrp_probe is indicating > "GPS Lock: Yes", then that > means that the *internal* GPS unit in the B210 can see enough > satellites to achieve PLL lock, > and is providing high-precision 1PPS and 10MHz internally. > > If you want to use an external GPSDO unit, you'll have to disconnect > the internal GPSDO unit within > the B210, because the 10MHz reference line internally can only be > driven by a single source. > > In terms of setup, when your application starts, it can use the > set_time_source() and set_clock_source() > APIs to specify "gpsdo" (for built-in gpsdo) or "external" (if you > want to connect the 10MHz and 1PPS > cables to the B210). > > what does a command look like to set clock and time_source to external?
i don*t really know how to handle API Calls. I am trying to set the external gpsdo with 10MHz and 1PPS as time and clock source for my GPS because its far more exactly so far as i know.. do i really have to disconnect the internal gpsdo? can't i even change the source on software base? thank you >> >> >> thanks in advance >> _______________________________________________ >> USRP-users mailing list -- usrp-users@lists.ettus.com >> To unsubscribe send an email to usrp-users-le...@lists.ettus.com > _______________________________________________ > USRP-users mailing list -- usrp-users@lists.ettus.com > To unsubscribe send an email to usrp-users-le...@lists.ettus.com _______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
