Re: [Discuss-gnuradio] Behaviour of gs-osmosdr when multiple devices in the source

[Marcus D. Leech]

On 10/23/2013 04:19 PM, Alexandru Csete wrote:
> Hi Marcus,
>
> I believe the behavior is different from source to source and
> basically depends on whether the source block takes advantage of the
> start/stop methods. For example, the Funcube Dongle Pro and Pro+
> blocks are gnuradio audio source blocks that use the start and stop
> methods and therefore will not start reading samples until the flow
> graph is started. In other words, two funcube dongles will be more or
> less synchronized, except for the clock differences. I think it is the
> same for the UHD sources.
>
> On the other hand, I have observed that if I create an rtlsdr source
> block, after a few seconds it will start spitting OOOOOO out to the
> terminal until I start the flow graph. This indicates that the rtlsdr
> source is started as soon as it is created.
>
> Alex
Interesting.  I'll observe, out loud, that it would be useful for my 
current coherence testing if the behaviour could be closer to "roughly 
synchronized".
  Not sure how easy that is to do for RTLSDR.