Hello Larry and PSN;

LOL, I will never believe real time
unless you can see the future.

My wishes are with you but I fear that
what you produce will not be affordable
for ME to possess.

What is most important to me is to VISUALIZE
that which the designs tell me about my circuitry.

If I am supposed to see a certain bandwidth
I would like to see the data that proves my equipment
is functioning properly.
A waterfall of a passing storm might reveal
the true bandwidth of my circuitry because
it is rich in low freq. noise.
This does not need to be Real Time so to speak.

The FFT does not need to be real time for me
to see where all the signals are falling.

If you are looking for something going on
like TORNADOES or Tunnel Diggers
then you need something
that is very very fast and almost real time.
But Earthquakes have already happened
and everything relating to them are
simply After-The-Fact.

I am still interested in knowing more
about everything science\math related.

Law Enforcement or Military could probably use
real time stuff. But for me it would only be
an expensive luxury.

Regards;
geoff

----- Original Message ----- 
From: "Larry Conklin" 
To: 
Sent: Saturday, July 14, 2007 07:28
Subject: Re: FFT Waterfall display


> OooooH Kay...  Now I'm beginning to get motivated.  I've already got 
> something running real time, just have to debug the thing to make the 
> FFT algorithm run correctly.  Nothing like a declaration of 
> impossibility to get the old juices flowing again.
> 
> Larry
> 
> Geoffrey wrote:
>> It Is My Sincere Belief that you will
>> not be able to get anywhere near
>> realtime with a home PC simply because
>> too many complicated iterations must
>> be made for many discrete points.
>> 
>> You will have to settle with after the fact
>> processing.
>> 
>> I have tried a FFT program myself using
>> my own data on a 3GHz machine and it takes
>> 11 seconds to process 29 minutes of data
>> each line of spectrum being seperated by
>> 4.5 seconds in time.
>> Each line pass representing 56.2 seconds of time.
>> 
>> ----- Original Message ----- From: "Larry Conklin" 
>> To: "PSN List" 
>> Sent: Sunday, July 08, 2007 12:56
>> Subject: FFT Waterfall display
>> 
>> 
>>> A couple of years ago I experimented with adding a real-time FFT 
>>> waterfall display to my home brew data logging and display program.  I 
>>> got the waterfall working just fine but there is something wrong with 
>>> the FFT calculation that I never got around to debugging.  The current 
>>> discussion may motivate me to take another look at it.  If I manage to 
>>> get something working, it wouldn't be much additional effort to adapt 
>>> the code into an independent program that would take PSN files as a 
>>> data source.
>>>
>>> Larry Conklin
>>> Liverpool, NY
>>> lconklin@............
>>> __________________________________________________________
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