Re: [Discuss-gnuradio] [USRP-users] Please Help whit GPSDO (OCXO)

Hello Yamith,

Marcus has pointed you towards a software defined GPS receiver if you want to work with the GPS radio signals as part of your project. If you only wish to know your location you can read the GPS position using the sensor API in UHD. This manual page covers reading the X310's GPS position. The gps_gpgga sensor will give a standard NMEA string with the device's position after the GPS has locked.

http://files.ettus.com/manual/page_gpsdo_x3x0.html

There is a C++ example included with UHD.
https://github.com/EttusResearch/uhd/blob/master/host/utils/query_gpsdo_sensors.cpp

Regards,

Derek

On Mon, Dec 7, 2015 at 1:09 PM, Marcus Müller <marcus.mueller@ettus.com> wrote:

Hello Yamith!

Those are two different things:
the GPSDO is a full GPS receiver. Its job is to give your X310 a reference oscillator that is controlled by the GPS clock, a very high quality clock, and a pulse per second, so that you can set the time in the device very exactly.

To decode GPS signals in software, you don't have to use the GPSDO. You can use different approaches, but probably you want to use gnss-sdr from gnss-sdr.com

Best regards,
Marcus

On 07.12.2015 21:36, Yamith Becerra Chaves via USRP-users wrote:

HELLO,

I am new at this.

I have the USRP X310 and board mounted GPSDO (OXCO).

I installed UHD (3.9.0 version) and GNURadio.

I tried my USRP and my USRP detects GPSDO.

I want to put to work the GPS.

I want triangulate my position, preferably using GNURadio. I do not know how to do this.

Can someone help me with this.

REGARDS

Yamith B.

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