QM range App Note, document number 260283, rev 15
Page 37 of 48
10. EMC PERFORMANCE
Conducted and Radiated Emissions Result for a QM7
Configuration with one of each type of module, at 1500W load, 7dB margin to Class B (High line)
Conducted emissions
In configurations with dual output modules (DM or DH) the margin is reduced with very low load levels. To avoid
reduced margin the total load of these modules should be kept above 5W.
Radiated emissions, 6.8dB margin
Frequency
(MHz)
QuasiPeak
(dBµV/m)
Polarisation
Limit
EN55011
Class B
(dBµV/m)
Margin
EN55011
Class B
(dB)
Limit
FCC
Class B
(dBµV/m)
Margin
FCC
Class B (dB)
47.76
32.2
V
40.0
7.8
40.0
7.8
51.60
31.1
V
40.0
6.9
40.0
6.9
56.60
32.9
V
40.0
7.1
40.0
7.1
60.80
30.5
V
40.0
9.5
40.0
9.5
66.64
30.5
V
40.0
9.5
40.0
9.5
72.80
33.2
V
40.0
6.8
40.0
6.8*
88.68
33.9
V
40.0
6.1*
43.5
9.6
92.88
33.2
V
40.0
6.8
43.5
10.3
151.04
24.6
H
40.0
15.4
43.5
18.9
160.00
28.1
V
40.0
11.9
43.5
15.4
*Minimum margin highlighted.
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
150k
300
400
500
800
1M
2M
3M
4M
5M
6
8
10M
20M
30M
L
e
v
e
l
in
d
B
µ
V
Frequ en cy in H z
EN 55011 Class B Quasi-Peak
EN 55011 Class B Average
