A.H. Systems CPF-630 Instrukcja obsługi - Strona 5

Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Sprzęt testowy A.H. Systems CPF-630. A.H. Systems CPF-630 12 stron. Current probe fixture

A.H. Systems Injection Current Probe Series

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