Re: [USRP-users] USRP X310 over PCIe: Recommended setup? (Windows, Linux, which one?)

Hi Lukas, I use pretty much this setup (Ubuntu 18 + X310 over PCIe). You can install kernel 4.15.0 from ubuntu repository and reinstall the driver. It work just fine. You may also need to download some RFNoC XML files that are missing on Ubuntu repositories (see: https://bugs.launchpad.net/ubuntu/

[USRP-users] linuhd 3.14.1.1 Problem in setting rx frequecy on n310

Hello to all the mailing list. I've a little problem in setting the rx frequency on my n310 when I need to acquire from all 4 channels. I use the n310 directly in my program using libuhd. The code I use in order to set the rx_frequency is:     First of all set the subdevs:     if(vm.count(

Re: [USRP-users] Time synchronization of multiple B210s not working with multiple channels

Marcus, Thanks for the suggestion. I added set_subdev_spec('A:A A:B') for the 2 channel case, but the results are the same. I also tried this code with a pair of X310s receiving. The results are somewhat similar: - Channel 0 (A:0) across 2 devices: no delay - Channel 1 (B:0) across 2 devices: no

Re: [USRP-users] Issues using TwinRX and x310 (phase shift)

Hi Etienne, I didn't see anything about "timed commands" in your email. These are needed in order to get phase synchronization. In particular, the "set_time_now" function is a red flag because you should be using instead "set_time_next_pps". See this

Re: [USRP-users] linuhd 3.14.1.1 Problem in setting rx frequecy on n310

Hi Paolo, The "A" daughterboard (for A:0 and A:1) only has one Rx LO (and one Tx LO) such that both channels will always share the same LO. The "B" daughterboard is the same. Thus you do not have independent RF control of all four channels on the N310. Does that make sense? Rob On Tue, Feb 25,

Re: [USRP-users] linuhd 3.14.1.1 Problem in setting rx frequecy on n310

On 02/25/2020 08:43 AM, Paolo Palana via USRP-users wrote: Hello to all the mailing list. I've a little problem in setting the rx frequency on my n310 when I need to acquire from all 4 channels. I use the n310 directly in my program using libuhd. The code I use in order to set the rx_frequency

Re: [USRP-users] Time synchronization of multiple B210s not working with multiple channels

On 02/25/2020 09:33 AM, Michael Wentz via USRP-users wrote: Marcus, Thanks for the suggestion. I added set_subdev_spec('A:A A:B') for the 2 channel case, but the results are the same. I also tried this code with a pair of X310s receiving. The results are somewhat similar: - Channel 0 (A:0)

Re: [USRP-users] [Non-DoD Source] Re: RFNOC: 2 input/2 output block, synchronizing their outputs to GNURadio host

Hello Andrew, 1. I understand from Analog documentation that the AD9361 outputs > 12-bit samples in two’s complement, is that right? Also I gather from > tracing through the HDL, within e31x_core, the data is packed MSB-aligned, > with LSBs 3…0 locked at 1’b0. When you feed a 16-bit I, 16-b

Re: [USRP-users] Polling the "sample_rx" via a user defined register (B205mini)

Hi Varban, I am now getting random 32-bit values when polling it from the UHD (instead > of a constant that indicates a "zero" reception) Even with the antenna disconnected you can expect some LSBs to toggle due to inherent receiver noise. 1) How should I interpret the 32-variable? > It is a s

[USRP-users] Closing Connection, X310 Problem

Hi, Question is in two related parts. 1 Closing Connection In 3.10.0 when I was finished streaming data I would call 1. m_usrp->reset() and 2. m_rx_stream->reset() but in 3.15 LTS I don't see a way to reset / discard the pointers returned from uhd::usrp::multi_usrp

Re: [USRP-users] Closing Connection, X310 Problem

On 02/25/2020 03:59 PM, Simon G4ELI via USRP-users wrote: Hi, Question is in two related parts. 1 Closing Connection In 3.10.0 when I was finished streaming data I would call 1. m_usrp->reset() and 2. m_rx_stream->reset() but in 3.15 LTS I don’t see a way to reset / discard the pointers