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5 Test Configurations
The MOST50 E-O Converter can be used in a variety of tests. This chapter provides four test configuration
examples, each using a pair of E-O Converters to electrically isolate the device under test from the other
network components. The test configurations provided can be used for:
Radiated Emissions
Bulk Current Injection (BCI)
Transverse Electromagnetic (TEM) Cell
Operational Electrostatic Discharge (ESD)
5.1 Radiated Emissions
Figure 5-1 shows a sample CISPR 25:2002 style test configuration for radiated emissions testing. Two
E-O Converters are used in the configuration. One is connected electrically to the DUT inside of the
anechoic chamber; the other is connected to the stimulus equipment outside of the anechoic chamber. A
glass optical fiber cable connects the E-O Converters together, isolating any radiated noise from the stimu-
lus equipment. The E-O Converter is grounded to the ground plane to minimize unwanted emissions.
Figure 5-1 shows that copper tape was used to ground the E-O Converter to the ground plane inside of the
chamber. A picture of the E-O Converter is shown to further clarify how it is connected inside the chamber.
Outside the chamber, the stimulus equipment, including all other nodes that are a part of the actual appli-
cation, are connected to the MOST50 network. An OptoLyzer G2 3050e may also be used outside the
chamber to monitor all MOST50 traffic.
