[Discuss-gnuradio] UHD stream tagging

[Price, Nathan D. (S&T-Student)]

Hello,

I'm working on project in gnuradio, in which I'm trying to toggle on and off 
the transmission from the USRP.  After much research, I learned this was done 
by tagging the first sample of a transmission with "tx_sob" and the last sample 
with "tx_eob" (there was also a "tx_time" tag, but I found the former option 
more convenient).  I wrote a custom block that periodically tags segments out 
of continuous stream of data as a proof of concept; however, the transmission 
remains continuous as if there were no tag.  I've checked with the tag 
debugging block to ensure my block acutally generates tags. My flow graph is 
simply: file source(repeat)->custom tagging block->psk mod->multiply const->uhd 
sink.

Reading in the archive, I haven't found reference to success much success with 
the streaming API. I would love the community's input on this problem.

Thanks,
Nathan