[Skimmertalk] Image frequencies falsely reported using QS1R

[Rich Hallman - N7TR]

I have seen this before.....using 192 kHz sample rate with a preamp.   Would be interested if others are seeing this.    I've noticed the N6WIN skimmer spot me on wrong frequencies in the past and was worried I had harmonics...but it was never on a harmonic from where I was operating.

73. Rich. N7TR

On Feb 14, 2013, at 2:17 PM, "Bob Wilson, N6TV" <n6tv at arrl.net> wrote:

> Today my Skimmer Server 1.3 is reporting stations on both the "right"
> frequency, and the *wrong* frequency, due to some type of signal image
> issue that I haven't noticed before:
> 
> N6TV <http://www.reversebeacon.net/qrz/rbn/N6TV>
> RU0ZM<http://www.reversebeacon.net/qrz/rbn/RU0ZM>
> 28019.2 CW CQ15 dB 24 wpm 2157z 14 Feb
> N6TV<http://www.reversebeacon.net/qrz/rbn/N6TV>
> RU0ZM <http://www.reversebeacon.net/qrz/rbn/RU0ZM> 28162.8 CW CQ11 dB 24
> wpm 2157z 14 Feb
> 
> 
> N6TV <http://www.reversebeacon.net/qrz/rbn/N6TV>
> P40L<http://www.reversebeacon.net/qrz/rbn/P40L>
> 28160.4 CW CQ [LoTW]20 dB 38 wpm 2155z 14 Feb
> 
> 
> 
> 
> 
> N6TV <http://www.reversebeacon.net/qrz/rbn/N6TV>
> P40L<http://www.reversebeacon.net/qrz/rbn/P40L>
> 28021.6 CW CQ [LoTW]22 dB 37 wpm 2151z 14 Feb
> 
> 
> This is using a QS1R attached to a Pixel RF-Pro1A 8' high, with a Norton
> pre-amp; I don't think it's a signal overload issue.
> 
> The only thing that has changed recently is that I'm using Aggregator
> version 2.4, though I don't think that has anything to do with it.  I
> selected my normal "Contest Rotation" .ini file.  Maybe I need to limit the
> CW range to frequencies below 28.150 in the that .ini file?  Or lower the
> "LO" frequency?
> 
> Has anyone else seen and cured this problem when using a QS1R with Skimmer
> Server set for 192 kHz bandwidth on 80 - 10m?
> 
> 73,
> Bob, N6TV
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