BCD396T: Computer Interference?

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scanhopkins

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Sep 9, 2016
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I am having a weird problem thats driving me nuts, I provide a feed using a 396T and I notice when I hook the audio cable into the scanner and computer that the transmissions the scanner receives drops by like 75% when I unplug the audio cable the scanner starts receiving all traffic again. What can be causing this?
 

UPMan

Uniden Representative
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RF conducted up the audio cable desensing the scanner. You could try putting a RF choke on the audio cable to see if that helps.
 

JamesO

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Might be desense, but it also may be a ground loop problem.

Try connecting just the shield of the audio cable and see what happens.

Does the signal strength meter increase or decrease?

Might try something like this - https://www.amazon.com/Pyle-PLGI35T-8-Inch-Stereo-Isolator/dp/B004HJ35F2/ref=sr_1_1?ie=UTF8&qid=1485715144&sr=8-1&keywords=1/8"+stereo+ground+loop+isolator

Also what happens if the radio is running on batteries and is isolated from a AC power adapter?

Might have multiple loops/problems?
 

scanhopkins

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Sep 9, 2016
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I tried it all and it still did not work, I hooked up my XT models and still the same problem. I hooked a Pro-668 up and it now works perfect. Thanks for the advice. I would rather not have my 668 dedicated to a feed but it works
 
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JamesO

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Might be that you require an audio ground loop isolator as I mentioned. Uniden has stereo audio connections and uses some a different audio amplifier design than many other vendors. I think they use a different audio amplifier design than the GRE/Whistler models.
 
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