You're exctly right. The thing was, the first spread spectrum clock oscillator (I'm not a fan of those) had a narrower "spread" and didn't cause the problem. It was when we widened the spread, to get the emitted noise spikes lower, that the ghost images started showing up.
Steve, actually you just had to follow the 4 rules of fault-finding for technicians. It's under rule 4. The rules are - 1)Turn it off, turn it on again 2)hit it 3) read the data sheet 4) look for the problem at the last place you touched before it stopped working. That usually solves 97% of all problems.
You're right, Batter. And I think the 97% statistic for step #4 is pretty close. In this case the problem was on a board 5 slots away on the backplane and some time had elapsed since the previous design change. Regarding the pesky spread spectrum clock oscillator, we were probably thinking if a little is good, a lot will be better.
A middle school team from Rochester, Mich., has again nabbed the grand prize in the annual international Future City Competition, which drew students from 37 regions of the United States, as well as from England and China.
The word “smart” is becoming the dumbest word around. It has been applied to almost every device and system in our homes. In addition to smartphones and smart meters, we now hear about smart clothing and smart shoes, smart lights, smart homes, smart buildings, and every trendy city today has its smart city project. Just because it has a computer inside and is connected to the Web, does not mean it is smart.
Are you being paid enough? Do you want a better job? According to a recent survey Manpower released just before Engineers Week, employers and engineers don't see eye-to-eye about the state of US engineers' skills and experience.
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