[Elecraft] [K3] K3 RF speech processor > aliasing ?

[pd0psb]

Hello Lyle!
Tnx fr replying.

I can confirm that the MON function is causing more aliasing.
I cannot confirm that the artifacts are not in TX audio.
With settings around CMP 10 I can start hearing "double whistle" aliasing
monitoring on an ext receiver.
Without RF processing the signal is very nice & clean.

Also checked some "analog" counterparts of RF processing, which do not have
this "mirroring" effect.

I understand you have to find the best compromise between processing
bandwidth and latency in K3 as a whole, but maybe the RF processor is a
small bit too economic?

73'
Paul
PD0PSB





I ran some tests here this morning regarding this.
The MON function, which allows you to hear your transmitted audio, is 
the source of the aliasing artifact you are hearing.  I deliberately 
removed most filtering from the demodulator to minimize delay.  The 
downside is lack of alias suppression.
I also confirmed that this aliasing product does not go over the air; it 
is local to the MON audio.
Meanwhile, your transmitted signal is clean!
73,
Lyle KK7P

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