A.H. Systems CPF-630 Gebrauchsanweisung - Seite 5
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TEST METHODS
PROBES AND TEST FIXTURES
In order to carry out a Bulk Current Injection Test, the following probes
and fixture will be required:
TEST METHOD FOR PRECALIBRATION
Due to the occurrence of large variable circuit impedance's and resonances
in cables, a calibration fixture is used to establish the forward power into the
injection probe, which develops defined currents in the calibration fixture.
The limits of current are established in a "Precalibration Test Set Up". This
test configuration is shown in Figure 2.
PRECALIBRATION TEST PROCEDURE
This test procedure consists of precalibration to establish the levels of
forward power necessary to generate the specification limits while clamped
onto the calibration fixture.
The precalibration is described in the following, and should be carried out
first.
1) The injection probe will be clamped in the calibration fixture as shown in
Figure 2.
2) The calibration fixture will be terminated in a 50 ohm, 50 watt RF load at
one end and a 50 ohm receiver 30 dB attenuator will be required to protect
the receiver or spectrum analyzer. The VSWR of the terminations at both
ends of the calibration fixture will be less than 1.2:1 over the frequency
range of the test.
3) The injection probe receives signal levels from the signal generator and
power amplifier. The limits of injected current in the calibrating fixture are
precalibrated for two levels of current magnitude:
A.H. Systems inc. – January 2017
REV B
Calibration Test Fixture
Broadband Current Probes (Monitor Probes)
Injection Current Probes
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