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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: 0.003 Hz drift DJ8WX at 8970,022 Hz |
| From: | wolf_dl4yhf <[email protected]> |
| Date: | Sat, 02 Feb 2013 20:27:29 +0100 |
| In-reply-to: | <[email protected]> |
| References: | <[email protected]>,<7F4CF64248DB4E6184E59688EA3B5435@Extensa> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20120713 Thunderbird/14.0 |
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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