Chris,
Maybe having a handheld receiver (with the antenna off) monitoring the RF
field might
reveal something. (I get more use out of my hamradio Icom IC-T90a transceiver
at
work than on the air.)
Regards
Dave Garnier - wb9own
David Garnier
e GE Health Care
___________________________________________
David S. Garnier
Senior Technician
Functional & CT Engineering
3000 N. Grandview Ave - M/S W-1250
Waukesha, Wi. 53188
Tel: 262.312.7246
Cel: 414.899.7580
_____
From: [email protected] [mailto:[email protected]] On Behalf Of Chileshe, Chris
Sent: Thursday, August 18, 2005 11:52 AM
To: [email protected]
Subject: RF Susceptibility: Sweep v/s spot check
Group,
On several occasions during radiated immunity EMC testing, I have observed
products deviate
or even fail and subsequent manual spot checks at the frequencies of interest
have revealed no
anomalous behaviour.
I saw such behaviour on a product I was testing recently, and spent a long
time conducting spot
checks at the frequency and the immediate neighbourhood without much success
replicating
the failure. I tried turning the modulation on and off and even applying the
modulated field instantly
on and off without much success. I did a sweep again and the deviation was
back like clockwork!
What is the explanation for this and there are techniques for getting round
this 'problem'?
Rgds
- Chris
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