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| To: | <[email protected]> |
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| Subject: | LF: Re: Re: RE: G3YXM & G3WCB |
| From: | "Alan Melia" <[email protected]> |
| Date: | Sat, 14 Jul 2007 22:16:38 +0100 |
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Mmmm I dont think so Roelof .......the IF filter should not make any difference unless you have in-band qrm. In fact a very narrow filter before an FFT can create artifacts which are not actually there sometimes. NDB mode uses a 12Hz resolution, effectively a 12Hz brick-wall filter with no phase problems. But there can be problems due to sample overlap, and the display protocol. Cheers de Alan G3NYK ----- Original Message ----- From: Roelof Bakker <[email protected]> To: <[email protected]> Sent: 14 July 2007 21:15 Subject: LF: Re: RE: G3YXM & G3WCB >> snip This demonstrates the benefits of using narrow audio filters. Best regards, Roelof Bakker, pa0rdt |
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