[USRP-users] RFNoC over Multiple USRP3 devices.

Hi all, I have a few questions concerning the connectivity capability of the RFNoC system w.r.t the FPGA and the UHD driver. The first of these concerns the limit of 16 CE blocks on the bus.    In an early RFNoC presentation it was suggested that a bridging CE block could be designed to add

Re: [USRP-users] Different amplitudes on each RX channel with N200

On 06/14/2018 06:28 PM, Keith k wrote: I was testing on 3.11.0, but im back on maint and it looks like the code is the same. Thanks. On Thu, Jun 14, 2018 at 9:39 PM, Marcus D. Leech > wrote: On 06/14/2018 04:57 PM, Keith k wrote: Hey Marcus Okay, we

Re: [USRP-users] Different amplitudes on each RX channel with N200

I was testing on 3.11.0, but im back on maint and it looks like the code is the same. On Thu, Jun 14, 2018 at 9:39 PM, Marcus D. Leech wrote: > On 06/14/2018 04:57 PM, Keith k wrote: > > Hey Marcus > > Okay, we looked into this and realized that the rx_samples_to_file program > has a bug. When

Re: [USRP-users] Different amplitudes on each RX channel with N200

On 06/14/2018 04:57 PM, Keith k wrote: Hey Marcus Okay, we looked into this and realized that the rx_samples_to_file program has a bug. When you set the channel, it doesnt tune the center frequency of the desired channel which is why the amplitudes are off. Anything other than the first

Re: [USRP-users] Different amplitudes on each RX channel with N200

Hey Marcus Okay, we looked into this and realized that the rx_samples_to_file program has a bug. When you set the channel, it doesnt tune the center frequency of the desired channel which is why the amplitudes are off. Anything other than the first channel is at DC. Finding this bug led me to a

Re: [USRP-users] Different amplitudes on each RX channel with N200

On 06/14/2018 01:30 PM, Keith k via USRP-users wrote: Hello all I noticed in my testing that I am seeing significant mismatch in amplitude on each channel of my N200(lfrx db) with the second channel being much weaker. I thought that it was a problem with my code, but when I hook up a signal

[USRP-users] Different amplitudes on each RX channel with N200

Hello all I noticed in my testing that I am seeing significant mismatch in amplitude on each channel of my N200(lfrx db) with the second channel being much weaker. I thought that it was a problem with my code, but when I hook up a signal generator and split to both RX ports and use the

Re: [USRP-users] GNU radio receiving file, X310

On 06/14/2018 01:01 PM, Michael West via USRP-users wrote: There may also be an issue with buffered I/O and how the flowgraph is stopped. The kill flowgraph button in the main window of GRC is like hitting Ctrl-C. Try closing the empty window that pops up. You can also try making the file

Re: [USRP-users] GNU radio receiving file, X310

There may also be an issue with buffered I/O and how the flowgraph is stopped. The kill flowgraph button in the main window of GRC is like hitting Ctrl-C. Try closing the empty window that pops up. You can also try making the file sink unbuffered and see if that makes a difference. Regards,

Re: [USRP-users] X310 Transmitting Energy on Zero Input

On 06/14/2018 04:55 AM, shachar J. brown via USRP-users wrote: Hi All, I've tried the following simple experiment with my brand new X310 (UBX-160 daughterboards): GRC Signal Source -->> Throttle -->> DMA FIFO -->> USRP Radio I assigned ZERO AMPLITUDE to the

Re: [USRP-users] Logging Underflows

On 05/10/2018 11:16 AM, Devin Kelly via USRP-users wrote: > Hello, > > I'm trying to log underflows.  All I really need is a list of timestamps > (or sample numbers) when an underflow occurs.  I can't easily figure out > how to do this.  I'm using UHD 3.9.7. You will need to call

Re: [USRP-users] X310 Transmitting Energy on Zero Input

Hi Steve, You're seeing LO leakage, a normal effect of transmitters. You can use an lo offset to move the leakage away from your center frequency. http://files.ettus.com/manual/page_general.html#general_tuning_process Since you're using an RFNoC based flow (correct?) you'll need to add the DUC

[USRP-users] X310 Transmitting Energy on Zero Input

Hi All, I've tried the following simple experiment with my brand new X310 (UBX-160 daughterboards): GRC Signal Source -->> Throttle -->> DMA FIFO -->> USRP Radio I assigned ZERO AMPLITUDE to the signal source, USRP had central frequency of 1.5 [GHz] and gain of 20.

Re: [USRP-users] NI USRP-2944R with PCIe Connectivity.

Hi Derek, Thank you for your response. I would like to have the PCIe 10Gigabit Ethernet card and the USRP connected via a fiber cable as I need a higher throughput and bandwidth. For a application which I am currently working on the Uplink packets drop and having a PCIe 10Gigabit Ethernet card