Re: LF: where do I start

[Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>]

Hi Dave,

Good that you answered the mail from a newcomer. Somehow i missed to answer him. You know, the mails coming in quiet quickly :-)
Yes, the test with DCF39 is the best test to check if calibration is < +- 1 Hz. The next test would be to look at signals concentrated arround 136.172 kHz :-) Accuracy can be checked here to at least +- 0.1 mHz :-)

73, Stefan7DK7FC

Am 27.03.2012 17:48, schrieb DAVE PICK:

Bob

It's not just the sound card that needs calibrating, have you checked that the converter is on frequency? It needs to be within 10Hz or so to give you  a chance of decoding. Listen on a carrier frequency of 138.83kHz and see if you have the carrier with regular data bursts from Germany. It should be S9 whilst the rest of the band is, hopefully, quiet. If it's not on 138.83 your cal is wrong, if it's weak your aerial needs tuning and if it's covered in noise you have real trouble!

Good luck!

Dave G3YXM

On 25 March 2012 20:35, bob@halkirk.org.uk <bob@halkirk.org.uk> wrote:

Hello I have got a down converter from 10.000 to 136-1ghz. I have Wolf and Argo , I followed the calibration instructions for the soundcard but all I see to get is corrupt data the odd letter and lots of ?. My  antenna is a 80 40 butternut. Can anyone point me in the right direction.   regards bob MM0RJR

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