Re: [Discuss-gnuradio] Success (kinda)

[Eric Blossom]

On Tue, Sep 16, 2003 at 11:40:03AM +1000, Alan Gray wrote:
> 
> Further to my problems with FM reception, I've just been
> looking through the standards for broadcast FM in Australia
> and the US. Most characteristics of the signal are identical,
> but I noted that in the US a 75uS pre-emphasis/ de-emphasis is
> used, whereas in Australia we use a 50uS pre-emphasis/de-emphasis

I don't think the preemph difference is the problem you're seeing.
In fact, fm_demod1 doesn't do anything about preemph, and it sounds
OK. 

> I freely admit to know a very minimal amout about FM and how
> it works, so I I was wondering if anyone could tell me what
> effect this would have on my reception, and also what I have
> to change in the code to adapt it to the Australian method
> 
> Sorry for hitting everyone with so many messages

No problem.  Glad to have other folks playing with the code.

> Alan

Eric