From: DL4YHF@aol.com
Message-ID: <126.2e36606c.2c57f5cd@aol.com>
Date: Tue, 29 Jul 2003 12:07:41 EDT
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF:GPS Locked signalling at LF
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<HTML><FONT FACE=arial,helvetica><FONT  SIZE=2>Hi Andy and group,
<BR>
<BR>This *may* be useful for anyone wanting to play with the soundcard without having to go into windows programming. In fact, you can use Basic in a DOS window if you like.
<BR>
<BR>I have a utility which reads samples from the soundcard, stereo or mono, with optional I/Q multiplication with an NCO, adjustable center frequency, and decimation of the sampling rate up to 2^12.
<BR>
<BR>The "interface" between the utility and your application is a simple disk file. All your program must be able to do is open, read, close, and delete disk files. The sound utility is command-line driven, so you can tell it what to do from your own application.
<BR>
<BR>If I had more time (*sigh*) I'd like to play with slow BPSK, but at the moment i don't have. Too busy from implementing DF6NM's colour direction finder in a windoze environment.
<BR>
<BR>The utility (for Soundcard and a PIC-based two-channel ADC) is available on my website at www.qsl.net/dl4yhf.
<BR>
<BR>Regards,
<BR> Wolf &nbsp;DL4YHF.</FONT></HTML>