Hi Peter, Stefan and the group, Peter asked: 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 aga
Dear VLF, In Spectrum Lab there are different methods for noise reduction (e.g. of lightnings). Those were discussed here in the last weeks. While Jim/M0BMU preferes the clipper (using 0 dB above AVG
Hello Peter, No, it is 48 kHz but there seems to be a cut off by the soundcard or the soundcard-driver? I already noticed that DHO-38 is missing there ;-) So now i lock the soundcard drift to GBZ (wo
Hello Stefan, This email I wrote five years ago may help you: Hello Tom, I have used your spreadsheet from the ANSI EMI Antenna calibration spec C 63.5 1998 to verify my measurements on different whi
Stefan, 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. May be there's a re-sampling process elsewhere in
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
Stefan, 0..22 kHz. I would expect DHO38 at 23.4 kHz not at 20.6 kHz. That's the mirror from 2nd Nyquist domain. Your sample rate is 44 kHz? Peter, df3lp
Peter, Ok, but it could be a IM with another signal?! Because i know that the sample rate is 48000 and it is successfully locked to GBZ. Additionally the main IM product, 9 kHz (due to strong LF broa
...additionally i even added a 8th window. It seems to look like a childish game what i am doing here but it helps me much, understanding to see how the clipper acts and so on. I just want to share t
Stefan, No, DHO38 is too strong. It's not where you expect it. Watch that trace at 20.6 kHz, broken from 0700-0755 utc. That's breakfast at Burlage observable every day. Peter, df3lp
