Extraneous signal from my rig..?

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km4udx
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Extraneous signal from my rig..?

Hello all! I'm looking at my local controllable noise levels (yes...to improve my WSPR RX performance, but you knew that...hahah).

What is causing duplicate spot reports for the same TX (me) RX (someone else)? Note the small freq delta of each same time pair.

If you calculate (okay, subtract) the SNR delta for each time pair, you get around a 23db delta, e.g., (28-5), (26-5), (29-3), (27-5)

I assume this has nothing to due with actual changes in SNR, but is a artifact of something else?

The freq delta between each pair is also about the same. So...does this suggest I'm sending a second spur or extraneous signal about .00012 mhz above the actual intended freq? The spot report with the +.00012 mhz is always the -26 -27 -28 SNR...so it is low power junk from my radio? Is this like passing gas in public?

Inquiring minds want to know!

(sorry the headers may not line up...)

UTC (y-m-d) TX txGrid RX rxGrid MHz W SNR drift Km Km/W SpotQ
2020-02-05 03:06 KM4UDX FM18iw W4DDT FM18hv 7.040062 10 5 0 9 1 1
2020-02-05 03:06 KM4UDX FM18iw W4DDT FM18hv 7.040182 10 -28 0 9 1 0
2020-02-05 02:46 KM4UDX FM18iw W4DDT FM18hv 7.040059 10 5 -1 9 1 1
2020-02-05 02:46 KM4UDX FM18iw W4DDT FM18hv 7.040179 10 -26 -1 9 1 0
2020-02-05 00:26 KM4UDX FM18iw W4DDT FM18hv 7.04006 10 3 0 9 1 1
2020-02-05 00:26 KM4UDX FM18iw W4DDT FM18hv 7.04018 10 -29 0 9 1 0
2020-02-04 21:46 KM4UDX FM18iw W4DDT FM18hv 7.040182 10 -28 0 9 1 0
2020-02-04 21:46 KM4UDX FM18iw W4DDT FM18hv 7.040062 10 5 0 9 1 1
2020-02-04 20:06 KM4UDX FM18iw W4DDT FM18hv 7.040059 10 5 0 9 1 1
2020-02-04 20:06 KM4UDX FM18iw W4DDT FM18hv 7.040179 10 -27 0 9 1 0
2020-02-04 19:26 KM4UDX FM18iw W4DDT FM18hv 7.040059 10 5 0 9 1 1
2020-02-04 19:26 KM4UDX FM18iw W4DDT FM18hv 7.040179 10 -27 0 9 1 0
2020-02-04 18:26 KM4UDX FM18iw W4DDT FM18hv 7.04006 10 5 0 9 1 1