----- Original Message -----

From: Laurence KL1X

To: [email protected]

Sent: Thursday, April 22, 2010 6:56 PM

Subject: RE: LF: vlf stuff

Using Spectrum labs with some new set ups - see attachments - File,  Load settings, then select one of the above youve pasted previously - the other piece of software is the SAQ RX  http://web.telia.com/~u33233109/saqrx/saqrx.html
 
cheers

 

----- Original Message -----

From: Markus Vester

To: [email protected]

Sent: Saturday, April 03, 2010 10:03 AM

Subject: VLF: SpecLab settings

Dear Wolfgang, Daniele, LF,

 

thanks Wolfgang for the hint about turning off periodic actions.

 

There are actually three configuration files in

 http://www.mydarc.de/df6nm/vlf/9kHz_Grabber_SpecLab_configurations.zip 

so some explanation is probably on order:

 

-  9kHzWide.usr has 0 to 24 kHz on the top and around 9 kHz at the bottom, with 1.46 Hz FFT resolution and 1 second scrolling. It's meant to give a quick overview of the band, eg. to optimize antenna coupling. You shold see the big MSK signals, and  three lines of tiny dots on the Alpha frequencies. But this setting is too fast to see a weak signal.

 

-  9kHz_slow2_white is the original 15.3 mHz setting, with the 8.97 kHz area at the top and 11.905 at the bottom. It scrolls at 10 seconds, and you can read QRSS 60 or slower keying. Beware there is an offset (0.30 Hz and 0.0397 Hz) on the frequency scales, which I had used to correct for my "white" notebook's samplerate offset. But this will certainly be different on other machines, so I would recommend to reset those offsets to zero, and use the samplerate calibration entry in SpecLab's audio settings tab instead.

 

-  9kHz_4mHz.usr is the one currently displayed on the lower part of my grabber. It has a more sensitive 3.8 mHz FFT and 1 minute scrolling. Again, you should delete the Freq1 and Freq2 offsets and enter your samplerate.

 

Good luck to Stefan and all,

 

Markus