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INSTRUCTION MANUAL
CLCI-100
BULK CURRENT INJECTION PROBE
with
FCLC-100
CALIBRATION FIXTURE
1912 1 E l T o ro R d
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REV051917
4.4 Conducted Immunity Test Level Calibration
(IEC 61000-4-6)
Calibration of test levels per IEC 61000-4-6 is performed with the
CLCI-100 Bulk
Current Injection Probe
installed in the
FCLC-100 Calibration Fixture
. The
calibration is performed into a 150 ohm system, rather than the standard 50 ohm
system employed by other standards, such as Mil-Std 461 and RTCA DO-160.
To realize a 150 ohm system,
ADA-515-2 150
Ω
to 50
Ω
Adapters
are installed on
either side of the test fixture.
4.4.1
Test Generator Equipment (Method A vs Method B)
Per the IEC 61000-4-6 standard, there are two acceptable procedures for
quantifying the Test Generator power when the appropriate test level is
measured during the calibration at any given frequency, so that the same
level can be reproduced during the actual testing process. For the
purposes of this procedure, we will refer to these as
METHOD A (Signal
Generator Output Method)
and
METHOD B (Forward Power Method)
.
Illustrated in Figure 9 are example diagrams of the respective test
generator systems.
FIGURE 9 -
Examples of Test Generator Systems
For each method, the RF power is injected into RF port of the bulk current
injection probe, and the amplitude is measured at the output of the 150
Ω
to 50
Ω
Adapter (ADA-515-2) connected to one side of the test fixture
(through a power attenuator). For each test frequency, the amplitude of
the injected RF is adjusted incrementally until the measured amplitude
reaches the appropriate level
(U
mr
)
.
POWER
AMPLIFIER
INPUT
OUTPUT
SIGNAL
GENERATOR
OUTPUT
to ... RF Port
of BCI
Probe
6 dB Attenuator
RF POWER
METER
INPUT
PWR SENSOR
EXAMPLE OF TEST GENERATOR EQUIPMENT
METHOD B
(Forward Power Method)
FIGURE 9b -
POWER
AMPLIFIER
INPUT
OUTPUT
SIGNAL
GENERATOR
OUTPUT
to ... RF Port
of BCI
Probe
6 dB Attenuator
EXAMPLE OF TEST GENERATOR EQUIPMENT
METHOD A
(Signal Gen. Output Method)
FIGURE 9a -
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