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From: mmallory@netcom.com (Mark Mallory)
Subject: Re: Radar Hurts
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Date: Fri, 30 Oct 1998 21:31:25 GMT
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Steve Peltz (peltz@jaka.ece.uiuc.edu) wrote:
: It is unlikely to be the fault of the headset. Try turning the transponder to
: standby for a few seconds when this is happening and see if it stops.

No, it's not the transponder.  My 20k's have the same problem.  The 
"blip" sounds are produced by rectification of the PRIMARY signals from 
nearby ASR radars, which are at much higher RF signal levels than 
transponder (secondary) signals, and at a higher RF frequency.  The sounds 
only happen when there's a radar in close proximity (a half mile or less).

It's actually quite common for consumer-type audio equipment to be 
susceptable to interference of this type from radar.  The very high powers 
(peak ERPs of tens of Megawatts) and high RF frequencies (5 GHz) used by 
these radars make shielding and isolation difficult.


