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Old 06-17-2004, 08:35 PM   #1
doneal
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Default Audiovox PNP2 Home Dock issues

First off, the purpose of this post is not to vent. But that is what it will sound like. I LOVE my AV PNP2 in my car! So much so that I went to Best Buy last night and bought the home dock. Hooked it up to my stereo in the living room and cranked it up. Good news, I've got the antenna signal strength maxed out! It sounded great for about 4 minutes...then a loud pop followed by silence lasting about 2 seconds. Then Big 80's continued playing. Every three or four minutes, the same thing. A loud pop followed by 1 to 3 seconds of silence. Back out to the car to check the PNP2, it is fine. Back in the house, 3 or 4 minutes of music followed by POP...silence! I went into the bedroom to get something and I heard it pop in the living room again...at the exact same time that the compressor in the bedroom window air conditioner kicked on. So I sat in the bedroom and waited. The next time the compressor kicked on, POP...silence.

I have my XM Sky-fi boombox (and antenna) less than 5 feet from the air conditioner in question and it works perfectly. I have the Sirius antenna outside, at least 15 feet from the air conditioner and the PNP2/home dock at least 10 feet away and POP...silence. To add insult to injury, because my wife and I use those low wattage floresent light bulbs instead of regular light bulbs, everytime you hit a light switch it's POP...silence. My XM Ski-fi in the home dock and in the boombox works perfectly. My AV PNP2, the one I REALLY want to listen to is unbearable and unacceptable. I am a very unhappy camper and don't know what to do.
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Old 06-18-2004, 09:52 AM   #2
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Do you have the AV PNP2 home dock, XM boombox plugged and A/C into the same circuit? Just trying to get some more information...
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Old 06-18-2004, 10:59 AM   #3
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Try a ground loop isolator.

http://siriusbackstage.com/forum/viewtopic.php?t=9162
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Old 06-19-2004, 07:09 PM   #4
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Default Bingo!

The ground loop isolator did the trick. THANK YOU!
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Old 06-21-2004, 10:17 AM   #5
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Default Re: Bingo!

Quote:
Originally Posted by doneal
The ground loop isolator did the trick. THANK YOU!
Excellent! Glad I could help.

Did you get the Radio Shack GLI? Do you notice any difference in the audio quality with it hooked up? From an engineering standpoint it's difficult to build something that breaks the ground loop but has no effect on the rest of the signal. The Radio Shack model is a pretty inexpensive one, so I wonder whether it makes a noticeable difference in the sound.
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Old 06-22-2004, 07:18 PM   #6
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Default Bingo!

I got the Radio Shack version. No degregation of the audio that I can notice. Sounds great and no more pop...silence! Thanks again for the tip.
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Old 07-09-2004, 12:41 AM   #7
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We just got a surround sound receiver/amp for the home entertainment center. It replaced my old yamaha stereo receiver/amp, which I had the PNP2 hooked up to.
To make a long story short, I started experiencing the 1/2-second dropouts mentioned above. Annoying as hell! But I remembered this thread, went to radio shack and it completely eliminated the problem. No sound degradation.

Thank you Icing!!

Just for kicks, I tried two other stereo amps other than my old yamaha, and neither exhibited the problem. Only with the Pioneer surround sound tied to the audiovox did I experience it.
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Old 07-09-2004, 11:41 AM   #8
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Quote:
Originally Posted by bcodog
Thank you Icing!!


Actually I don't deserve any credit since I was just repeating what I saw in that other thread. In fact, the only reason I noticed it was because I sometimes have the same problem.

Notice I said "sometimes". It's weird. Sometimes when the toaster oven cycles its elements on and off, the PNP2 will drop out. I've occasionally had it happen with the regular old incandescent light fixtures, too. But it happens quite infrequently and doesn't last very long, so I've never been motivated to get the ground loop isolator.

I wonder why mine is intermittent. Maybe it depends on what the electrical load is in the rest of the house. You'd think the toaster oven being on a different circuit than the stereo would prevent the problem, but that thing pulls a lot of current when it switches on, and all the house's circuits are connected through ground, right? Why a stupid 60W incandescent light would cause it is another question - no big inrush current there.

Quote:
Just for kicks, I tried two other stereo amps other than my old yamaha, and neither exhibited the problem. Only with the Pioneer surround sound tied to the audiovox did I experience it.
Mine happens with a garden-variety Sony A/V receiver. In electrical design, grounding can be an art. Clearly there's some issue with the PNP2's grounding scheme, but it appears that it depends also on the grounding design of what it's connected to. In your case the Pioneer component's grounding interacts badly with the PNP2's when the voltage on the circuit fluctuates.

Did you figure out which electrical device in your house was triggering the dropouts?
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Old 07-09-2004, 12:27 PM   #9
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Quote:
Originally Posted by icing
Did you figure out which electrical device in your house was triggering the dropouts?
I only put up with the dropouts for 24 hours. Sometimes the dropout hit without any apparent stimulus. Sometimes the dropouts were exactly in sync with stimuli like turning on a light, plugging in a fan, running the vacuum.
What triggered it every time without fail was my router. That's when I knew for sure it wasn't a problem with the signal.
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Old 07-09-2004, 12:32 PM   #10
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Quote:
Originally Posted by bcodog
Sometimes the dropout hit without any apparent stimulus.
Maybe the refrigerator, which has a big compressor that is always cycling on and off.

Quote:
What triggered it every time without fail was my router. That's when I knew for sure it wasn't a problem with the signal.
Do you mean a "woodworking power tool" router, or a "computer network" router? If the former, it's no surprise since it's a big electric motor with a huge inrush current. If the latter, then all I can say is WOW, you've got it bad.
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