Re: [Discuss-gnuradio] Gnuradio clock coherence?

[John Ackermann N8UR]

On 11/14/2017 02:20 PM, Marcus D. Leech wrote:

> > My real question is whether it's safe to assume that a flowgraph is 
> > entirely clocked by the samples from its hardware source, and 
> > consequently that processing within the flowgraph (e.g., oscillator 
> > and mixer for tuning) does not introduce potential frequency errors.

> A flow is clocked by the hardware--either by samples being produced or 
> consumed by the hardware.
>
> The exception is when you use a "throttle" block in the absence of any 
> hardware.  In that case, the PC clock (very roughly) controls sample rate.
>
> So, in the absence of overruns or underruns, the signal processing in a 
> flow-graph cannot introduce timing errors, unless deliberate a programmmed.

Thanks, Marcus.  That's what I thought, but it's good to have it verified.

John