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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