CS (serv.man2) - JBL Audio EMC - CB Certificate (repair manual). Page 8

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Rev. No. 1.2 
3.4 Performance 
level 
 
The test results shall be classified in terms of the loss of function or degradation of performance of the equipment 
under test, relative to a performance level defined by its manufacturer or the requestor of the test, or agreed 
between the manufacturer and the purchaser of the product. 
 
Definition related to the performance level: 
 
 
 
based on the used product standard 
 
 
based on the declaration of the manufacturer, requestor or purchaser 
 
Criterion A:  
Definition: normal performance within limits specified by the manufacturer, requestor or purchaser: 
 
The equipment shall continue to operate as intended during the test. No change of actual operating state (for 
example change of channel) is allowed as a result of the application of the test. The criterion of compliance with 
the requirement is a wanted to unwanted audio signal ratio of 
≥ 40 dB at a wanted audio signal level of 50 mW, 
or at another audio signal level specified by the manufacturer. No degradation of test picture is allowed. 
 
Criterion B:  
Definition: temporary loss of function or degradation of performance which ceases after the disturbance ceases, and from which the equipment 
under test recovers its normal performance, without operator intervention: 
 
After the test, the equipment shall continue to operate as intended without operator intervention. No loss of  
function is allowed after the test when the apparatus is used as intended, but failures which are recovered  
automatically but which cause temporary delay in processing, are permissible. No change of actual operating state
is allowed as a result of the application of the test. During the test, degradation of performance is allowed. 
 
Criterion C:  
Definition: temporary loss of function or degradation of performance, the correction of which requires operator intervention: 
 
 
 
 
 
Criterion D:  
Definition: loss of function or degradation of performance, which is not recoverable, owing to damage to hardware or software, or loss of data: 
 
 
 
 
 
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