[TenTec] Carrier sliding across bands

[MadScientist]

Well, I entered the SDR world with my new IC-7300! That’s off topic but what I have observed with it is very much on topic.

Over the past year I have heard, on all rigs, a carrier sweeping across the band (all bands). It is fairy strong.

The landscape ,on the 7300 is fast enough to observe the nature of this. The signal consists of actually three peaks that typically start on the low end of a given band and sweep the range of 200 KHz in about 2 seconds, with the speed being nearly constant, as evidenced by the sloping line that the signal makes on the waterfall display.

That line is almost perfectly monotonic across the entire scope window.

In addition, I sometimes see a carrier that makes a back-hand-forth movement on the waterfall display.

Does anyone have any idea what be the origin of this signal??

I know it’s not a radio artifact as I have herd this on a dozen different radios. Also, if I disconnect the antenna, this is never heard.

Gary