In the modern ham shack, with computers, rig control software, logging software, digital mode software, firmware update software, and myriad other utilities, it is for all practical purposes mandatory to have your rig connected to your computer via an RS-232 or serial cable.
As you may imagine, this opens up a world of possibilities, including opening up avenues for hum, noise, and RFI.
I labored for a month or more to discover why when I transmitted, my computer desktop would alternate from normal to “Dashboard” mode and back again, rapidly and many times (I have a Mac — Dashboard mode dims the normal desktop and brings up on top . . .
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