Re: [USRP-users] VITA time in X310 FPGA

2018-01-22 Thread Martin Braun via USRP-users
Hey Dmitry, for the DDC case, we always use the timestamp for the first package. If your decim is 2, then every other timestamp is effectively discarded. The counter your referring to is thus more relevant for the DUC use case. Cheers, Martin On 01/16/2018 01:51 AM, Дмитрий Михайличенко via USRP

Re: [USRP-users] VITA time in X310 FPGA

2018-01-16 Thread Дмитрий Михайличенко via USRP-users
2018-01-16 3:31 GMT+03:00 Martin Braun via USRP-users < usrp-users@lists.ettus.com>: > On 01/11/2018 01:38 AM, Дмитрий Михайличенко via USRP-users wrote: > > Hi, > > > > I am trying to understand timestamp tracking in FPGA and noticed one > > possible issue in axi_rate_change.v module . > > > > VI

Re: [USRP-users] VITA time in X310 FPGA

2018-01-15 Thread Martin Braun via USRP-users
On 01/11/2018 01:38 AM, Дмитрий Михайличенко via USRP-users wrote: > Hi, > > I am trying to understand timestamp tracking in FPGA and noticed one > possible issue in axi_rate_change.v module . > > VITA time in packet headers is counted in ticks of master clock > frequency, i.e. 200 MHz. For me it

[USRP-users] VITA time in X310 FPGA

2018-01-11 Thread Дмитрий Михайличенко via USRP-users
Hi, I am trying to understand timestamp tracking in FPGA and noticed one possible issue in axi_rate_change.v module . VITA time in packet headers is counted in ticks of master clock frequency, i.e. 200 MHz. For me it looks like axi_rate_change adjusts time by adding time from the first packet in