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Alignment process
Mike Easterbrook
I'm now using a scope direct across the af output for all my alignments. Set around the test tone freq. & very easy to adjust vertical gain as signal peaks or troughs. I found the bar display bouncing around and switching levels a bit disconcerting & found myself turning the pots in the wrong direction. Scope works well for me.
On Mon, 17 Aug 2020, 21:53 Giulio Paris, <giulio.paris@...> wrote:
Hi
there is a video showing the alignment process for QCX?
It is possible to use on oscilloscope for the alignment process?
Thank
--
IZ0FVD Giulio
Giulio Paris <giulio.paris@...>
On Mon, Aug 17, 2020 at 08:50 AM, Mike Easterbrook wrote:
Is this correct?
I'm now using a scope direct across the af output for all my alignments. Set around the test tone freq. & very easy to adjust vertical gain as signal peaks or troughs. I found the bar display bouncing around and switching levels a bit disconcerting & found myself turning the pots in the wrong direction. Scope works well for me.I have put my oscilloscope X1 on the output terminal and this is what I see compared to what thw QCX scree shows. Moving the C1 I got the max.
Is this correct?
Mike Easterbrook
Yes that's correct - for C1 (8.7) adjust for max amplitude decreasing vertical gain as necessary to keep within screen. For R17 (8.8), R24 (8.9), R27 (8.10) adjust for minimum amplitude increasing vertical gain &/or volume pot as display flattens but avoid overloading i.e. maintain sine wave. Try for as close to flatline as possible.
Hope that helps