Originally Posted by
Luc Lion
I believe that this issue will only be overcome if each altimeter maker provides the authorities with the results of standard tests on the interference immunity of their device : standard size and gain of the supported antennas, characteristics of their band filter, saturation curve of their first amplification stage vs frequency, supported in-band interference and noise level, etc.
Um, maybe I am naive (maybe??) but are these not data that manufacturers would have needed to supply in order to get their devices certified for installation in airframes?