ON TOUR XT (serv.man3) - JBL Audio EMC - CB Certificate (repair manual). Page 11

 

 

 
 

EMC Report for Harman Model JBL On Tour XT 
File: 3109671LAX-009 Revision 1 

Page 11 of 27 

 

4.2  Conducted Emissions Measurements 
 
4.2.1 

Site and Test Description  

 
The test facility is a specially designed and constructed by using a metallic wall as the vertical coupling 
plane. One test site is used for CISPR and FCC testing. 
 
All conducted voltage measurements are made on each current-carrying conductor at the plug end of the 
EUT power cord or calibrated extension by the use of mating plugs and receptacles on the EUT and 
LISN/AMN if used.  Equipment is tested with power cords that are normally used or that have electrical 
and shielding characteristics that are the same as those cords normally used.  For those measurements 
using a LISN/AMN, the 50 

Ω measuring port is terminated by a 50 Ω receiver or a 50 Ω resistive load.  

Hence all 50 

Ω measuring ports of the LISN/AMN are terminated by 50 Ω.   

 
If a screened room or chamber is used, the EUT is placed 40 cm from a conductive wall, with the wall at 
the lead of the EUT.  IF the test is being performed on an OATS or sheltered site, the vertical ground 
plane is placed 40 cm away from the rear of the EUT.  
 
The mains lead shell be arranged to follow shortest possible part between the EUT and Artificial Mains 
Network on the ground. The excess length of the lead between the EUT and the LISN/AMN receptacle 
(or mains outlet where a LISN/AMN cannot be used) is folded back and forth at the center of the lead to 
form a bundle not exceeding 40 cm in length.  If the EUT does not have a flexible power lead, then it is 
placed at a distance of 80 cm from the LISN/AMN (or mains outlet where a LISN/AMN cannot be used) 
and connected to it by a lead or appropriate connection no longer than 1 m.  Measurements are made at 
the LISN/AMN end of this lead or connection.