Can I have a comment on it?
-- Bob On Thu, Jun 5, 2014 at 11:02 AM, bob wole <bnw...@gmail.com> wrote: > Sorry for not stating the hardware earlier. I am using USRP N210, with > RFX2400 and WBX boards. > > -- > Bob > > On Wed, Jun 4, 2014 at 11:07 PM, Marcus Leech <mle...@ripnet.com> wrote: > >> I don't know the detailed answer, but any such answer will depend very >> much on which USRP hardware you're talking about. >> >> One of the R&D people who deals with the FPGA codebase may be able to >> give a precise answer, given stated hardware. >> >> >> >> on Jun 04, 2014, *bob wole* <bnw...@gmail.com> wrote: >> >> Marcus! Thanks for you comment. >> >> I think that USRP transmit FIFO is at the start of the DSP chain in FPGA >> i.e it is prior to both of the interpolation filters? right? I am not >> talking about when the burst will be over the air, I want to know when the >> first sample of the burst will leave the transmit FIFO if it has been >> tagged as tx_time=X. >> >> >> >> -- >> Bob >> >> >> On Wed, Jun 4, 2014 at 10:51 PM, Marcus Leech <mle...@ripnet.com> wrote: >> >>> It will depend some on the effective group delay of both the >>> interpolation filters in the the FPGA and the analog group delay of the >>> analog bits of whatever daughtercard you're using. >>> >>> The only way to be sure is to measure... >>> >>> >>> on Jun 04, 2014, *bob wole via USRP-users* <usrp-us...@lists.ettus.com> >>> wrote: >>> >>> I am using stream tags for the transmission control. I want to know >>> what is the accuracy/precision of the tx_time tag? E.g if I tag a burst A >>> with tx_time=X, then the burst A will come out of the USRP transmit FIFO at >>> X+delta, how large the value of delta could be? >>> >>> >>> -- >>> Bob >>> ------------------------------ >>> >>> _______________________________________________ >>> USRP-users mailing list >>> usrp-us...@lists.ettus.com >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>> >>> >
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