Mirko, I happen to have a copy of CISPR 16-1 at hand. Clause 16.6 "Open area site validation procedure" reads:
... The deviation between a measured NSA value and the theoretical value shall not be used as a correction for a measured EUT field strength. This procedure shall be used only for validating a test site. ... The above statement is not followed by any explanation. What do you think the reason is? My guess is that there are lot of factors causing inaccurate E-field measurement. The collective result of those factors cannot be simply corrected by changing antenna factors. At the end of your message, however, you stressed on "for a specific test setup". May we try this "illegal" correction procedure with caution only "for a specific test setup" and for a specific frequency range? Hopefully it might be worthwhile to try. Barry Ma Anritsu Company Morgan Hill, CA ----------- On Tue, 11 January 2000, "Matejic, Mirko" wrote: Richard, You could improve correlation by adjusting chamber antenna factors for a correlation differences which you can get from NSA measurements one at OATS the other in the chamber with a fixed antenna height. You could also determine correlation differences by comparing measured field strength levels from battery powered comb generator. Fixed vs. 1-4m antenna height among other factors will always create unpredictable correlation for a specific test setup. Mirko Matejic ______________________________________________________________ Free Internet Access from AltaVista: Get it, share it & win! http://freeaccess.altavista.com/pika/www/initweb.jsp --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
