Tx path problems with RFX-900


I have two problems about USRP Tx path as below:

1.General in the TX path,transmit data repeat again and again(I use
RFX-900 daughterboard),but in my reseach I need to transmit data one
period ,or after break some period,continue to transmit data.How do I do

2.I want know Tx FIFO how full it is.Have any command or program script
in Gnuradio can show the FIFO state?

This message was sent on behalf of [email protected] at
http://www.opensubscriber.com/messages/[email protected]/topic.html