The International Electrotechnical Commission has posted a corrigendum for the CISPR 16 Part 1 -1, which is the specification for radio disturbance and immunity measuring apparatus. The IEC draws attention to the fact that it is claimed that compliance with this document may involve the use of a patent concerning the measuring receiver with rms-average detector (patent no DE 10126830) given in Clause 7.View the Corrigendum from the IEC.