You may want to look at my messages in the thread "UHD command delay is
different in the first recv stream".
You'll see that: delays have been there for a long time, are still there in
UHD 3.10.x, delay values depend on sampling rate (and/or master clock
rate), and, more critically, the very first
If you are using UHD 3.9.x or earlier, I would guess filter delay...
> On November 16, 2017 at 5:31 AM Hojoon Yang via USRP-users
> wrote:
>
> Hi.
>
> I use USRP B200 with external on-board GPSDO.
>
> 1. I set the clock source and time soure to GPSDO
> usrp->set_clock