Hello Markus,
Many thanks for an explanation.
NB here in the receiver it is always switched off. Also I switched off and AGC,
and reduced level of signals. But sidebands do not disappear at any variants :(
73 Andrey
Dear Andrey.
here this is happening because the receiver's gain control or noise blanker
reacts on DCF39 or HGA22 telegrams. They normally occur every 11 seconds. The
receiver then modulates all signals in the passband, and gives them a set of
sidebands 1/11s = 0.09 Hz apart.
Switching off AGC and NB will remove the sidebands on the signals completely,
but at the cost of an increased background from the original DCF FSK sidebands.
Kind regards,
MArkus (DF6NM)
----- Original Message -----
From: "Andrey rn3agc" <[email protected]>
To: <[email protected]>
Sent: Sunday, December 20, 2009 12:28 PM
Subject: LF: "harmonics"
Hello LF,
At strong levels of a signal such "harmonics" are formed here.
Somebody knows the reason of formation of these "harmonics"?
73 Andrey
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