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| To: | [email protected] |
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| Subject: | Re: VLF: Clipping or blanking?? |
| From: | Stefan Schäfer <[email protected]> |
| Date: | Fri, 21 May 2010 00:15:20 +0200 |
| In-reply-to: | <38A51B74B884D74083D7950AD0DD85E82A1BFB@File-Server-HST.hst.e-technik.tu-darmstadt.de> |
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Hello Peter,Indeed, there was something wrong arround 24 kHz. Now i have switched to my /p USB soundcard (that contains its own driver). Now, DHO is available :-) Additionally there is a button that allows switching OFF the AGC. This improved the wide band overview even much more (it seems that the old driver of the PCs soundcard has also used a AGC)! The 9 kHz IM is still available but i already have new ideas for tmw... GN, Stefan/DK7FC Am 20.05.2010 21:47, schrieb Stefan Schäfer: Hello agn, Hm, maybe the audio driver is a bad one. I had to set up this PC new (win XP) and lost the audio driver. I found a new driver in the web that should be suitable for this mother board but maybe it does not work sufficiently up to 48000... I will check this later with my alternative USB soundcard... 73, Stefan/DK7FC ________________________________ Von: [email protected] im Auftrag von pws Gesendet: Do 20.05.2010 18:32 An: [email protected] Betreff: Re: VLF: Clipping or blanking?? Stefan, You wrote:... Ok, but it could be a IM with another signal?!No, unlikely, since it appears where a mirrored signal of DHO38 should appear at a sample rate of 44 kHz. I don't think that's accidentally.Because i know that the sample rate is 48000May be there's a re-sampling process elsewhere in your software.and it is successfully locked to GBZ.How to lock the sample rate of a sound card against a MSK modulated signal? The only idea I have is to demodulate it and locking a re-sampling process against one of the two carriers - by software. May be there's the key. Beste Gruesse aus Kiel, Peter, df3lp |
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