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Hi Neil,
yes, this can't work; you can only multiply two numbers if there are
two numbers (factors). Which will never be the case, since there has
not been a multiplication before the first factor.
Message passing can't make an flowgraph that has a synchronous path
("normal" sample flow) asynchronous. What you most probably want is to
receive the message with a block that e.g. sets the factor in a
multiply_const block.
Hope I could help a little,
Marcus
On 29.01.2014 13:15, MHMND Herath wrote:
> Dear sir I want to implement a feedback system for example attached
> feedbackmessageoassing.pdf attached. Its output is zero. No thing
> comes for output. I tested message passing in different ways. No
> clear output comes. For the above feedback system nothing comes
> out. Please help me. How to implement such a feedback syste. Thanks
> Neil
>
>
>
> _______________________________________________ Discuss-gnuradio
> mailing list [email protected]
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
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