[Discuss-gnuradio] UHD stream tagging

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

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