I am running a B210 USRP with the built in GPSDO. My goal is to collect a fixed 
number of samples (4 Million) at the start of every minute over the course of 
about an hour. I am setting up the script to make use of the 
STREAM_MODE_NUM_SAMPS_AND_MORE collection mode. For my application It is 
important that the collection starts precisely every minute, hence why I am 
synchronizing with the GPSDO. Because of this, I am attempting to tune the LO 
with the GPSDO every minute before the collection starts in order to keep the 
LO from drifting. Furthermore, right before starting the collection, I query 
the GPSDO for the location and log it as well. This seems to have a blocking 
effect on the whole USRP. How can I use timed commands to ensure that I 
synchronize time with GPS Time, tune the LO with the GPS 10 MHz, and start 
collection of my fixed number of samples, with a known time spacing between 
each of these so that I can minimize any LO drift by the time I start 
collecting my samples.

Thanks,
Sidd
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