Re: [Discuss-gnuradio] list of uhd/usrp_sink return messages

[Marcus Müller]

Hi Matija,

GtGtGtGt: typically this happens if you accidentially set the length_tag attribute of the USRP sink, although you're not using tagged streams blocks. It's tG for "tag gap", ie. the sink expects samples to come in as streams with a length tag specifying how many samples to consume, right before the next tag comes. If there's more samples than the length tag promised, this happens. Now, if you don't plan to use tagged stream blocks (that's not stream tags, like tx_freq!), never set the length_tag.

t: sorry, I can't find the place in the source code where that might happen; maybe it's strangeness happening with the output stream; however, I'm not quite sure what you mean with "return messages".

Best regards,
Marcus

On 07.08.2015 12:52, Mat Mat wrote:

hi guys,

is there a comprehensive list of return/error messages by the usrp_sink?

1.When I try to send an item to the USRP sink with a tx_time tag, I get
a flood of "GtGtGtGt"

2. when I send an item to usrp_sink with the packet_len tag, again I get
"GtGtGtGt"

3. when I send an item to the usrp_sink with the tx_freq tag, I get a
lot of 't' in the return messages.

But what do they mean exactly?

many thanks and kind regards,
Matija