[Discuss-gnuradio] A note to owners of existing VOLK modules

2015-11-20 Thread West, Nathan
In August VOLK changed an ifdef guard for complex.h that results in breaking builds for OOT modules when VOLK is installed because of some redefinitions. This has already broken and been fixed in a couple of OOT modules. This is just a public heads up to anyone who might be maintaining a VOLK OOT

Re: [Discuss-gnuradio] USRP Latency.

2015-11-20 Thread Will Thompson
Hi Stephan That interesting with your answer, and we will use get time at last pps in some of our work as well now. Actually, Martin Leech gave an answer that seems good, “You're probably just seeing the group delay of the interpolation filters on the N210, which for a given configuration, sh

Re: [Discuss-gnuradio] USRP Latency.

2015-11-20 Thread Ludwig Stephan (CR/AEH4)
Hi Will, as you might have seen, my issue was pretty simple to solve. Let’s attack yours, which seems to be more tricky. Considering your questions: We request the current time from just one (the master) USRP. But I meanwhile checked both times and up to a fraction they are equal, as you also

Re: [Discuss-gnuradio] N210 MIMO packet TX time alignment when using message strobe

2015-11-20 Thread Ludwig Stephan (CR/AEH4)
Hi List, thank you all for your comments and suggestions. I found the solution. Viewed from now, it was pretty simple: If one changes the code as stated in the original post, the time tags will only be inserted sometimes, i.e. only if noutput_items is not a multiple of the packet_len value, bec