Wow, Thanks Peter!

How have you found that? By guessing? :-)

73, Stefan

Am 10.10.2010 16:13, schrieb pws:

Hi Stefan,

You wrote:

...
There is sometimes a trace arround 10,6 kHz which looks as a MSK signal
that cannot be there. I have observed the same line on my grabber. Do
you have an idea what can cause this trace on this QRG?
...

Signal from 2nd Nyquist domain folded back.
24 + (24 - 10.6) = 37.4 kHz ==>  NRK / Iceland at 37.5 kHz is very strong
here in Europe.

73 from Kiel,
Peter