Thanks for the advice Sreeraj, but would a sampling rate mismatch stop
the flow graph from executing at all?
If In the same flow graph I substitute the RTL-SDR by the UHD USRP
Source using the N210, the flow graph executes properly.
Joe
The sample-rate mismatches will be different with the UHD devices.
2.8Msps is not a proper fraction of 100Msps, so UHD will pick
something "close".
You really, really, need to make sure that the sample rates within your
flow-graph are consistent and correct. Doing anything other than
that will lead to rapid overruns or underruns at some early point in
the execution of your flowgraph. Having correct sample rates isn't
optional, it's absolutely vital to making sure your flow-graph
executes correctly, particularly when there are two hardware devices
involved--
in this case, an SDR source, and an audio sink. Everybody has to
"see" the correct sample rate--there's no "kinda sorta close" operator
in DSP work.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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