One of my wife's clients got us a fancy-schmancy baby monitor that incudes a camera and monitor setup. Problem is the monitor apparently picks up interference from other electrical devices - microwave, dishwasher, etc. The older monitor we have works just fine. Did my wife cook the new one when she plugged power into the audio jack? Would a filter on the power line help? Should I return this one and get another? That will be tricky, it was a gift.
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David
The chief cause of failure in this life is giving up what you want most for what you want at the moment. -
Different Frequecy
The new monitor is likely on a different frequency and it is one that some nearby device emmits. It could be anything that is oscillating and giving off the offending frequency. Try going around and shutting things off one at a time to see if you can isolate the source. Once you find it you can decide if the monitor or the source is the one you want to keep. Sometimes better grounding or shielding of the source will kill the interference.
Sometimes a power line filter helps. However, if the interference is being radiated through the air then it will not
As far as damage to the audio by plugging in the power, If you have audio then no damage had occured. Most audio outputs are capacitive coupled and will not pass DC current.
LeeCut twice.... measure?? -
FWIW, with ours I noticed that if a device was plugged in on the same electrical circuit, such as the computer or TV, we'd get interference at times ... changed outlets (different circuit) and the noise went away ..."Experience: that most brutal of teachers. But you learn, my God do you learn". by C.S. LewisComment
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hehe...we used to hear our neighbours talking on the corfless phone with oursComment
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thats the price you pay for part 15 devices. no protection from interference...if the microwave is causing it its probably 2.4 GHZ (ISM Band) What isn't in that band now? I got digital 5.8 GHz Phones so everything else would still work. Haven't had many problems since I switched. But try to limit what you use in 2.4 and the few things that are left might be ok.YOU DONT HAVE TO TRAIN TO BE MISERABLE. YOU HAVE TO TRAIN TO ENDURE MISERY.Comment
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Yes, it's possible you fried it, I'll wouldn't bet on it. I would isolate the problem to electric or air. If electric a different circuit or electrical filter might be able to eliminate it. I remember in my parents old house that when Mom ran the vacuum cleaner (while plugged into certain circuits) the TV would go bonkers. Seems like she always did this in the middle / end of the 4th quarter.
If air then you would have to stop using the offending device. Or your could shield the whole offending device in lead / aluminum.
You might be able to turn the device to send the rays in another direction. Wouldn't hold my breath on it chances are it's sending out in all direction, but you never know it's worth a try.
You could tell the person the device is not working correctly (as in a bad device out of the box) which could also be true. Then take it back and get a different one, which might work better. I don't think the person who gave it to you would be offended. We have all bought something brand new that didn't work and had to be returned, it happens.Ric
Plan for the worst, hope for the best!Comment
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Many home radio devices operate on the 2.4gigahertz frequency band... it's an unlicensed area. Microwave ovens, cordless phones, wireless PC networking stuff (802.11b/g), some walkie-talkies (I think the "FRS - Family Radio Spectrum" devices are 2.4ghz) and baby monitors. So there's lots of potential interference sources.
It's fairly easy to isolate 2.4gigahertz junk off the power lines though; that high a frequency will be blocked by darn near any inductor. Just tightly coiling the power cords of those devices will make a big difference. Those ferrite "toroid cores" you can buy at electronics parts places will do a lot too - get a round donut large enough to stuff the electrical cord through, wrap a few turns around the torroid.
mpcComment
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