Re: [Discuss-gnuradio] usrp_sink tx_time tag

[Martin Braun]

Are you doing bursty transmission (i.e. using eob/sob tags, or using
tagged streams)?

M

On 07.08.2015 07:09, Mat Mat wrote:
> hi all
> 
> I've one more tag related question:
> 
> I want to sent packets in burst over a usrp_sink. the time between two
> consecutive bursts should be 7ms. thus, I want to use a tx_time_tag
> along with every first item of a packet so that the usrp waits for 7ms
> before transmitting it. However, it seems that no matter what values I
> send along with the tx_time tag, I always get a huge flood of "L",
> which, as far as I know, means that the sample is too late. can anybody
> please enlighten me as to which values I have to transmit with the tag?
> As far as I know, the value should be a tuple, with one value being the
> integer part of a timestamp, the other the fractional part after the
> decimal point (right?) It seems obvious that I'm sending wrong values
> since I always get an "L"-flood no matter what number I transmit with
> the tag.
> 
> Note: I set the time of the USRP to 0 before I run the top_block.start()
> command.
> 
> kind regards,
> Matija
>