I suspect this is/was a MCW generated signal with a bit too much drive
applied. Thus over drive of any audio stage such as may occur when
feeding the computer output or sound card output to the microphone
input. In this configuration it is very easy to overdrive the first
stage, which appears before any gain adjustments. Once this stage is
driven into distortion the least amount, no adjustments down stream in
the audio chain will clean up the signal. Also excessive ALC, and in
some radios any degree of ALC will cause the artifact, and any amount
of audio processing will cause the basic same effect.
73 Bob, K4TAX
On 8/7/2015 8:38 AM, Graham g3tct wrote:
What frequency? What spacing between the peaks?
On VHF this effect can often be seen due to aircraft scatter, ie
doppler shifted returns as well as the direct one.
So lots of possible explanations.
Graham
On 19:59, Gerard Elijzen wrote:
I was in contact with a CW station recently and his signal had 3
peaks on my PX3.
Can anyone explain. The other station was using an ICOM 7410.
Submitted this also on the KX3 Yahoo forum and had 1 reply. Thanks
for that.
Thought I might post it here in the hope to get an explanation. Have
never seen this before and it does not happen on other CW stations.
Gerard VK2JNG
Gerard
vk2jng at iCloud dot com
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