Brian, EN 55022:1994, Clause 1 Scope and object reads: Procedures are given for the measurement of the levels of spurious signals generated by the ITE and limits are specified for the frequency range 9 kHz to 400 GHz for both Class A and Class B equipment. No measurements need be performed at frequencies where no limits are specified.
No limits (and methods of measurements as well) were specified at frequencies above 1 GHz, so no emission measurements at frequencies above 1 GHz need be performed. EN 55011:1991 Clause 1 Scope and object, Sub-Clause 1.3 reads: Procedures are given for the measurement of radio frequency disturbances and limits are laid down within the frequency range 9 kHz to 400 GHz. Limits for the emissions at frequencies above 1 GHz were given only for the range 11.7 GHz-12.7 GHz, for the remainder of the range limits are under consideration, so no emission measurements need be performed.. New EN standards for radiated emissions at frequencies above 1 GHz are in the development stage for over two years. Regards, Mirko Matejic ---------- From: Brian Kunde To: RCIC Subject: Radiated Emissions Above 1Ghz. List-Post: [email protected] Date: Thursday, May 30, 1996 8:25AM The EN55022 and EN55011 standards do not show (as far as I have been able to find) emission limits over 1Ghz. Does anyone know how we are to test products with fast clock speeds who+s harmonic could cause emissions problems over 1Ghz in Europe? Are newer versions of the standards coming out which may address this? If so, any idea of what the limits might be? Thank you, Brian Kunde LECO Corp.
