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#12
September 9th 06, 08:10 PM
posted to rec.aviation.owning
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GNS 430 reception problems
No way the sensitivity difference between the two radios should be 20 dB --
that reflects an incident signal strength difference of 100-fold! If the Garmin is not defective (and the unit swap seems to confirm this) then the receive signal is being attenuated by roughly 20 dB someplace. This should be fairly easy to find using a spectrum analyzer or similar instrument, again something any avionics shop should have available. However, I must wonder why your avionics shop isn't going through these rather obvious diagnostic steps without outside help. -Elliott Drucker 
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