(meteorobs) a strong return

[Lawrence D. Lopez]

I'm wondering ...

When I looked at it first upper and lower
sidebands with a carrier between going
top to bottom.

But that is the completely wrong interpretation.

The frequency is left to right not up and down.
Time is up and down.
I don't see any carrier with this interpretation.

I do see a somewhat broad in frequency energy which
which changes in timed from low, high, and low amplitude.

Larry




Paul Goelz wrote:
> At 10:38 PM 1/17/2013, you wrote:
>   
>> Yes it is a meteor. The bright areas on either side are artifacts of FFT.
>> There is nothing that can cause sidebands since the bandwidth of the window
>> is 300 to 3500 Hz and the source is monotonic, you can see a harmonic
>> directly above the trace; a distortion artifact in the receiver.
>>     
>
> I'll take your word for it.  But I have seen many spectrograms of 
> modulated carriers that look exactly like that, especially AM.  Tune 
> 1KHz off from an AM station and that is about what you will see.... a 
> carrier at 1KHz and information on either side of it.
>
> Again, I was just curious because that was what it looked like to me.
>
> Paul
>
>
> Paul Goelz
> pgoelz at comcast.net
> Rochester Hills, MI
> www.pgoelz.com 
>
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>   

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