FYI I've noticed a very similar issue, isolated it to non usrp gnuradio
blocks in tx chain. Specifically the constellation or *psk modulator
blocks. Certain combos produced garbage IQ data(visible as several spikes
in PSD display) at regular intervals (seemingly related to sample rate),
this is vis
gr-analysis[1] has specrec, which I use for doing recordings. It does
synchronous writes(not sure how that will fare when writing to USB), in
multiple threads. You could at least check out its source for any further
ideas.
[1] https://github.com/garverp/gr-analysis
On Jul 14, 2017 10:38 AM, "Brai
Preface: all this talks about uhd+gnuradio, uhd itself has far more slim
deps.
Last I used PyBOMBs (grcon last year) it didn't work too well on C6. Things
may have changed.
I know it was pushed pretty hard at grcon. I have gotten GR installed
thanks to Ben Hilbern's back port[1], but always built
Certainly if you can use the latest Ubuntu LTS, use that instead.
I have a C6 box talking to an x310 and n210 without issue, but I don't need
to support twinRX (which requires 3.10), just the UBX/SBX.
It can be done, but given you need the latest uhd version, you may need to
source build many dep
Try specrec to record data.
https://github.com/garverp/gr-analysis
As to why it works better see this presentation:
http://www.trondeau.com/grcon15-presentations#wednesday_Lincoln_Synchronized
(The link is down at the time of writing, perhaps it will be up again soon)
With it I am able to do 50M
Make sure to run sync after to dd.
Also curious as to reason for the recommendation against dd?
On Nov 16, 2017 12:35 PM, "Philip Balister via USRP-users" <
usrp-users@lists.ettus.com> wrote:
> Try bmaptool. dd is a bad idea, yeah I killed my hard drive once.
>
> https://wiki.gnuradio.org/index.
Afaik, no, dd is just a normal command, you can pass conv=fdatasync
and not have
to worry about cache, but otherwise it's won't know about it.
Cool, never heard of bmaptool. The faster writes sounds awesome. Thanks for
the info.
On Nov 16, 2017 4:42 PM, "Philip Balister" wrote:
> On 11/16/2017
You want the raw block device /dev/sdb, not the partition /dev/sdb1, no?
Could that be it?
On Nov 16, 2017 5:28 PM, "Mann, John - 0662 - MITLL via USRP-users" <
usrp-users@lists.ettus.com> wrote:
> I tried issuing a sync command after the dd command - no help.
>
> I also tried using bmaptool to
Add a multiply block after ishort and multiply by 1.0/(2**15-1) or
thereabouts. (If you only are using 14 bits of that 16 b, do 14)
On Dec 10, 2017 07:00, "Benny Alexandar via USRP-users" <
usrp-users@lists.ettus.com> wrote:
> Hi,
>
> I want to stream an IQ file base band signal using usrp. The f
Used to have to compile the driver for the lime in debug mode to get
underrun reporting. Though I believe they may have changed some of that
recently.
On Tue, Jul 24, 2018, 23:57 Marcus D. Leech via USRP-users <
usrp-users@lists.ettus.com> wrote:
> On 07/24/2018 11:42 PM, RizThon via USRP-users w
10 matches
Mail list logo
