Thanks everyone for the replies.
I will pass this information onto the person who raised this query.
>From the information I was provided the LED Spots issue a broadband noise seen
>as rise in the ambient noise floor over the frequency range 30MHz to 180MHz,
>there is some minor noise between 18MHz to 30MHz but the rest of the frequency
>range between 20Hz and 18GHz is clean.
The effect on the 30MHz to 180MHz is a lift in the ambient noise floor
approx..8-10dB around 40MHz getting less as the frequency increases. The test
engineer stated that the measurements were still below spec limits but
apparently during system measurements was enough to cause the unit to fail.
(Unit passed when the LED Spots switched off.
There is no noise detectable during conducted emissions (20Hz to 150MHz).
Regards
Andy
Andrew Price
Land & Naval Defence Electronics Division
Prinicpal Environmental Engineer (EMC)
Leonardo MW Ltd
Sigma House, Christopher Martin Rd, Basildon SS14 3EL, UK
Tel EMC LAB : +44 (0)1268 883308
Mobile: +44 (0)7507 854888
andrew.p.pr...@leonardocompany.com<mailto:andrew.p.pr...@leonardocompany.com>
leonardocomapany.com
HELICOPTERS / AERONAUTICS / ELECTRONICS, DEFENCE AND SECURITY SYSTEMS / SPACE
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