>> 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
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