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RE: LF: 0.003 Hz drift DJ8WX at 8970,022 Hz

To: "[email protected]" <[email protected]>
Subject: RE: LF: 0.003 Hz drift DJ8WX at 8970,022 Hz
From: Laurence KL1 X <[email protected]>
Date: Sat, 2 Feb 2013 10:41:19 -0900
Importance: Normal
In-reply-to: <[email protected]>
References: <[email protected]>,<[email protected]> <[email protected]>,<[email protected]>
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Thanks Wolf - Ive been itching to ask that question for some time!

Laurence

> Date: Sat, 2 Feb 2013 20:27:29 +0100
> From: [email protected]
> To: [email protected]
> Subject: Re: LF: 0.003 Hz drift DJ8WX at 8970,022 Hz
>
> Hi Laurence and all,
>
> You asked:
>
> >
> Is it better to have a longer FFT input size and smaller decimate or
> say smaller input size and larger decimate :-) ?
> <
>
> It doesn't matter for this application. Important is only the resulting
> FFT bin width, which is displayed on the 'FFT Settings' panel.
> Longer FFT and less decimation has the advantage of covering a larger
> bandwidth (to pan around), but since we know Uwe's frequency quite
> accurately that's not so important. On PCs with less than a gagabyte of
> RAM, or if many other programs need to run simultaneously, keep the FFT
> size below 512k .
>
>
> 73,
> Wolf DL4YHF .
>
> (back from the club station; quite heavy QRM/QRN here so I decided to
> call it day on MF)
>
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