Question about the sampling rate

Hi all,
I am new to gnuradio and i am trying to make simple transmission and
I want to understand the sampling rate of the uhd sink and source and
to choose it
and the sampling rate of the blocks in the flow graph.

when running on sine of 100 kHZ and sampling rate of 0.5 MHz and same
sampling rate for uhd
I get UUUUUUUUUUUUUUUUUUUUUUUUUU ,it means under sampling,Right?
How to avoid it ???

On 02/26/2012 12:11 PM, Ahmed A. wrote:

How to avoid it ???

Sample rate is really only relevant at the edges, and when calling the
filter synthesis modules, most interior blocks have no concept of
sample rate.

‘U’ means under-run the producer (in this case, your program) can’t keep
up with the consumer–the UHD device.

Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

hi all,

the usrp final samling rate coming out from the codec is 128 Msps so i
think that you should follow this equation : sample rate* interpolation
=128 msps you can set the sampling rate =1 msps and the interpolation
rate =128
try it and inform me of the result
osama riad