Panadapter Symmetry Question

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Panadapter Symmetry Question

Elecraft mailing list
Hi, I have been noticing that on my P3 and on an SDR IQ hooked to the iF output of either of two K3's,  that there is a small difference in level from one side of zero beat to the other. The noise is about five db higher on the high frequency side than on the lower side. Same on two different K3's, both with upgraded PLL's. I know it is minor, but I am using the K3 as a back end for my EME station and the higher noise tends to cover some signals.  Anyone else noticed it? Any fixes or adjustments?   JPEG available.    Thanks, Doug K6JEY

Dr.Doug Millar EdD.
K6JEY
[hidden email]
562 810 3989  cell/text

 
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Re: Panadapter Symmetry Question

Wes Stewart-2
Doug,

I have two K3s and two SDR-IQs and don't see this on either.  How wide are you
sweeping?  Across a 190 kHz band there is a little difference probably
attributable to filtering in the K3, but it's really minor and more-or-less
symmetrical.  I usually use 50 kHz in the menu and then sweep only 20 or 30 kHz.

Wes  N7WS

On 1/8/2018 12:35 PM, Doug Millar via Elecraft wrote:
> Hi, I have been noticing that on my P3 and on an SDR IQ hooked to the iF output of either of two K3's,  that there is a small difference in level from one side of zero beat to the other. The noise is about five db higher on the high frequency side than on the lower side. Same on two different K3's, both with upgraded PLL's. I know it is minor, but I am using the K3 as a back end for my EME station and the higher noise tends to cover some signals.  Anyone else noticed it? Any fixes or adjustments?   JPEG available.    Thanks, Doug K6JEY
>
> Dr.Doug Millar EdD.
> K6JEY
> [hidden email]
> 562 810 3989  cell/text
>

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