Re: [USRP-users] Problem with tx_waveform reference lock

2021-02-21 Thread Marcus D. Leech via USRP-users
On 02/21/2021 07:00 PM, Guillermo Gancio via USRP-users wrote: Dear Marcus, Thank you very much for your answer, the reference that I use comes from a 10MHz GPSDSO, that I also use with other ettus boards without any problem as receivers. I did some tests using the Python APIs and the reference

Re: [USRP-users] Problem with tx_waveform reference lock

2021-02-21 Thread Guillermo Gancio via USRP-users
Dear Marcus, Thank you very much for your answer, the reference that I use comes from a 10MHz GPSDSO, that I also use with other ettus boards without any problem as receivers. I did some tests using the Python APIs and the reference sensor shows a locked state, then I add a 5 seconds delay on the

Re: [USRP-users] GPSDO fails to lock

2021-02-21 Thread Marcus D Leech via USRP-users
Every GPS implementation is different. It may be the case that higher SNR is required for timing receivers compared to position receivers. Sent from my iPhone > On Feb 21, 2021, at 10:13 AM, Johannes Demel wrote: > > Sure. Generally I wouldn't expect GPS to work in a building. Though, sinc

Re: [USRP-users] GPSDO fails to lock

2021-02-21 Thread Johannes Demel via USRP-users
Sure. Generally I wouldn't expect GPS to work in a building. Though, since we have at least 3 different systems (phone, RPi /w GPS-shield, LTE eNodeB) that work there, I assumed that the GPSDO would do so as well. On 21.02.21 14:23, Marcus D. Leech wrote: On 02/21/2021 07:15 AM, Johannes Demel

Re: [USRP-users] GPSDO fails to lock

2021-02-21 Thread Marcus D. Leech via USRP-users
On 02/21/2021 07:15 AM, Johannes Demel wrote: Thanks for your hints. The antennae and devices are indoors. Is there a difference if the device receives a signal and locking onto that signal? e.g. the devices determines the signal too distorted to lock? https://itstillworks.com/doesnt-gps-work-i

[USRP-users] How to issue start stream command directly to DDC/Radio block using GNU Radio

2021-02-21 Thread Tuan Hoang Dinh via USRP-users
Hi, I'm testing my first RFNoC block using GNU radio, when executing the graph, the UHD return recv() time out like the picture below. [image: image.png] I searched on the mailing list and know this is a problem when start stream command did not send directly to DDC/Radio block, the new RFNoC blo

Re: [USRP-users] GPSDO fails to lock

2021-02-21 Thread Johannes Demel via USRP-users
Thanks for your hints. The antennae and devices are indoors. Is there a difference if the device receives a signal and locking onto that signal? e.g. the devices determines the signal too distorted to lock? On 19.02.21 16:32, Marcus D. Leech wrote: On 02/19/2021 09:48 AM, Rob Kossler wrote: W