Greetings, I'm a first time user of gnuradio.
Kudos to the developers, it only took me about a day to build
gnuradio + gr-osmosdr (for my el-cheapo rtl2832 dongle) from
source, including getting a basic FM broadcast receiver sort-of
running. Host Ubuntu 14.04 on a very fast Dell 8-core server
platform.
I've prototyped an FM receiver as described in the tutorial
at the bottom of this page:
However, when I run it, and set the center frequency to a
close-by FM station, although I can hear actual broadcast
audio snippets, meaning that it's actually receiving a
coherent signal, it is very choppy, with audio snippets being
played in a very choppy, almost rhythmic fashion. The console
window on gnuradio-companion shows a continuous series of
aUaUaU, etc.
I'm guessing this might be an underrun situation somewhere,
but that is speculation. I'm using parameters provided by the
tutorial including a sample rate 250K. I've tried moving the
sample rate around, but without much improvement. Dropping it
down significantly destroys all hints of intelligence in the
signal ;) Am I overtaxing the capabilities of this rtl-sdr
dongle?
I have a reasonable (and growing) understand of the core
concepts, but could use some help on the learning curve.
Any advice appreciated.
-Chris
--
Life is like Linux - it never
stands still.