Re: [USRP-users] Plagued by sporadic TX underruns on some systems, B200

2019-05-06 Thread Mark-Jan Bastian via USRP-users
On Mon, May 06, 2019 at 09:36:34AM +0200, Matthias Br??ndli wrote: > > Pure theory: What if this intermittent issue would be an issue with a > > certain sequence of packetlengths, some of them on the boundary of the > > maximum size for that endpoint and endpointtype, that are not handled > > pr

Re: [USRP-users] Plagued by sporadic TX underruns on some systems, B200

2019-05-02 Thread Mark-Jan Bastian via USRP-users
Hi Mathhias, On Thu, May 02, 2019 at 02:18:38PM +0200, Matthias Br??ndli via USRP-users wrote: > On some systems, we observe sporadic underruns. They occur in irregular > intervals, something like once a minute, sometimes rarer. Seen with both > USB2 and USB3 hosts, over several UHD versions. Unt

Re: [USRP-users] [EXTERNAL] Re: Recording the full X3x0 bandwidth

2019-03-13 Thread Mark-Jan Bastian via USRP-users
On Tue, Mar 12, 2019 at 09:10:02AM +0100, Mark-Jan Bastian wrote: > In the past there have been videocards that host a 16x16x16 PCIe bridge (ie. > IDT, > or broadcom) to accomodate two 16-lane PCIe GPUs, each with their own > GDDR5 memory. Note that there is also Microsemi (a microchip company)

Re: [USRP-users] [EXTERNAL] Re: Recording the full X3x0 bandwidth

2019-03-12 Thread Mark-Jan Bastian via USRP-users
ng my 10G ethernet connection > >> (but it is 220KB in size so I didn???t attach it here) but I am not > >> familiar with how to determine what you asked about from the tree and what > >> to do about the configuration in any case. Is the configuration fixed and > >>

Re: [USRP-users] Recording the full X3x0 bandwidth

2019-03-09 Thread Mark-Jan Bastian via USRP-users
?s > the only viable alternative to pursue given the present hardware > configuration? > > Joe > > > On Mar 9, 2019, at 5:14 AM, Mark-Jan Bastian via USRP-users > > wrote: > > > > Hi Paul, > > > > I can record from the X310 to disk to nvme x4 PCIe a

Re: [USRP-users] Recording the full X3x0 bandwidth

2019-03-09 Thread Mark-Jan Bastian via USRP-users
Hi Paul, I can record from the X310 to disk to nvme x4 PCIe at 800 MB/sec for a few minutes. There is still a risk of O 's appearing. First thing to check is the number of PCIe lanes available to the disk controller and disks, and how many and which PCIe bridges are in between on your motherboar

Re: [USRP-users] B210 EMI in GPS band

2019-01-20 Thread Mark-Jan Bastian via USRP-users
Hi Dave, You could try a shorter USB 3.0 cable, they can be as short as .2 meters. If running from a laptop, run the laptop from battery, reduces a radiating power cord and DC/DC charger/switch mode powersupplies from your setup. Use a second laptop with/or dedicated spectrum analyser and RF prob