Re: GNURadio/USRP stream tag execution not as expected

On 18/04/2023 15:46, Nicolas Buhr wrote:

Update: I found a way to make it work on the X310 (and in a limited way also for the B210)

If I implement it as a bursty transmission (with tx_sob, tx_eob and tx_time tag) I can calculate the time of the gain change from tx_time and the sample rate and add it to the tx_command tag.

This only works for the X310.

For the B210 the time tag doesn't work for some reason. But on a bursty transmission the position of the tx_command tag works to some extend (not on the exact sample asked for, but with some delay).

My guess is that the B2xx series use the AD936x series, and part of the DSP chain is in the chip, and that chip doesn't know
  anything about time tags, so only the FPGA parts of time-tag processing know anything about them.