SpecLab configurations for VLF grabber 
http://df6nm.darc.de/vlf/vlfgrabber.htm
http://df6nm.de/vlf/vlfgrabber.htm

2016-06-26

#15: VLF-wide colour-DF
#17: VLF 477 uHz
#19: VLF 63 uHz, data export to "spectrum\datavlf\"
#18: TX with 1pps phase lock
