[Lowfer] WM

[N8OOU]

Hi Garry,

Thanks for the feedback on my revised graphic. I agree with you, I was 
not completely happy with this version. You are correct about this 
having distinct frequency steps. Actually each of the 3 blips is made up 
of 2 steps. I removed two steps in between each blip.  The reduced 
number of of frequency steps is a compromise to reduce the overall 
transmission time, and keep enough energy in each Argo bin to paint a 
bright dot.

The down side of lengthening the transmission time is the increasing 
chance of drifting off frequency. As we approach spring, with more rapid 
temp swings I expect that to become a problem.

I have been thinking of things I could do to reduce the transmission 
time. I can stop the graphic portion by simply disabling that 
transmission.

It's funny that my first graphic version seemed to come thru better than 
the FSK, while these last two versions have consistently been weaker 
than FSK.

Thanks for listening.

73   de   N8OOU - Mike Meek

On 02/07/2016 07:42 AM, Garry wrote:
> Mike, it's always great to copy a lowfer and yours was in strongly
> around local sunrise this morning. But I'll offer a few comments that I
> think would improve it's readability.
>
> I think the FSK "WM" adds unnecessary clutter and simple QRSS30 would be
> better. Despite a rather strong signal this morning (visible at rate
> QRSS3), the visual "WM" does not stand out well on my captures. It seems
> to be composed of frequency steps that are too large and infrequent. Not
> sure what control you have with the Ultimate3S but hopefully there's a
> way to make the frequency steps smaller and more frequent so the
> resulting waveform is smoother. What I'm seeing currently looks like the
> up and down beginning and end lines for both "M" and "W" only have 3 or
> 4 discrete frequency steps.
>
> But of course WM is at least transmitting. SIW is QRT for lightning
> damage repairs. So far Bob, NK9M has confirmed that the synthesizer,
> which was feared dead, is okay. So it looks like perhaps the PA FET
> needs replacement. Hope to be QRV again shortly.
>
> 73, Garry, K3SIW, EN52ta, Elgin, IL
>
>
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