NARDA PMM AS02, User Manual

Page: 52 / 56

3-4 Radiated Emission and Immunity testing
The calculation of the output level is given by:
where:






m
V
dB E
μ
=Generated Electric field
( )
V dB G
μ
= Signal Generator Level
( )
dB C
1
= Interconnecting cable loss
( )
dB A
= Power amplifier gain
( )
dB C
2
= Interconnecting cable loss






m
dB TAF
m
1
3
= Transmit Antenna factor at 3 m =
( )
5 , 41
1
log 20
3
10
−






−
m
dB AF f
m
MHz
The variables and terms in the above expression are used for calibration
test setup only. They demonstrate how the instrumentation and facility
factors contribute to meet the typically required E-field uniformity value of
-0.0 dB to + 6,0 dB.
Fig. 3-2 Radiated immunity test setup
( ) ( ) ( ) ( )






+ − + − = 





m
dB TAF dB C dB A dB C V dB G
m
V
dB E
m
1
3
2 1
μ
μ
Antenna Pow er am plifier
3 m
Field s trength
m eter
R F s ignal generator
Fiber optic link
C able C able
TAF
C 1 C 2
G A