I put this topic up in the Facebook Acurite users page and was surprised at the number of people who are having the same problem I am. I posted this:
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I wonder if any of you Atlas owners ever experienced this.
I have an Atas with three displays. Usually all three have maximum signal bars, but a few times each day, at different times the bars will slowly drop down to zero for about 5 minutes, then slowly and mysteriously return back to normal. If one display has no signal the others are fine at the same time! Then it'll happen on a different display. I've checked out any possible source of local interference but find nothing
I know about the a,b,c switch, but am told that has nothing to do with changing frequency, it just changes a packet identifier so your display won't read a nearby Atlas instead of yours.
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Lots of people were experiencing this along with me. Has anyone else here?