Re: [USRP-users] B210 overflow

2017-08-29 Thread Vladimir Rytikov via USRP-users
will it help to change data type from float to complex16 to reduce data rate ? On Tue, Aug 29, 2017 at 11:02 AM, Marcus Müller via USRP-users < usrp-users@lists.ettus.com> wrote: > 20 MS/s is already 80 MB/s, which is 0.64 Gb/s. It's not that little data > to shuffle around! So you already need a

Re: [USRP-users] B210 overflow

2017-08-29 Thread Vladimir Rytikov via USRP-users
Marcus, I see your point. In GNU Radio flow chart when you instantiate USRP source - you can set out put datatype. The default is complex float - two floats per sample which is 4*2=8 bytes. you mentioned on USB wire we got 2*2 bytes per sample = 4 bytes per sample. so we got double data rate comi

[USRP-users] polyphase clock sync eats 100% cpu once it gets samples

2017-10-03 Thread Vladimir Rytikov via USRP-users
Hi, I am trying to run an example from GNU Radio - examples/digital/packet/uhd_packet_rx and uhd_packet_tx with real USPR radios connected via an attenuator and a coax cable. When I enable receiver by clicking on 'On' check box - the whole RX flow graph freezes. I think I manually adjusted transm

Re: [USRP-users] polyphase clock sync eats 100% cpu once it gets samples

2017-10-03 Thread Vladimir Rytikov via USRP-users
assuming you're using windows; after starting htop, press F2 for > setup, go into the "Display Options", enable "Show custom thread names", > press Esc > > On 03.10.2017 12:54, Vladimir Rytikov via USRP-users wrote: > > Hi, > > I am trying to run an

Re: [USRP-users] 10 MHz reference signal on B210

2017-10-03 Thread Vladimir Rytikov via USRP-users
Dario, 10 MHz signal input is meat to be freq reference. If a radio could tell that 10 MHz is not 10 MHz - there was no need to feed it externally. USRP boards seem have +/1ppm freq stability. 1ppm means when you tell radio to tune to 100 MHz - it might end up giving you 100 MHz + 100 Hz or might

Re: [USRP-users] polyphase clock sync eats 100% cpu once it gets samples

2017-10-08 Thread Vladimir Rytikov via USRP-users
your computer, in terms of CPU model, >>> motherboard chipset, RAM configuration, OS? If you install and run "htop"¹, >>> you'll see which block does how much without much complication, and maybe >>> also significant non-GNU Radio CPU usage (for example, my mai