Reference No.: WTX22X08165842W001

EXHIBIT 4 - TEST SETUP PHOTOGRAPHS

Conducted Emission Test Setup

This section displays the test setup used for conducted emission measurements. The configuration involves connecting the device under test to measurement equipment to assess electromagnetic interference conducted back onto power lines.

Radiation Emission Test Setup (Below 30MHz)

This photograph illustrates the test environment for radiation emission measurements conducted at frequencies below 30MHz. The setup is situated within a controlled RF environment designed to capture radiated electromagnetic disturbances accurately.

Radiation Emission Test Setup (30MHz to 1GHz)

This section features the test setup for radiation emission measurements within the frequency range of 30MHz to 1GHz. The configuration is optimized for measuring radiated emissions in this specific band.

Radiation Emission Test Setup (1GHz to 18GHz)

This photograph showcases the test setup employed for radiation emission measurements from 1GHz to 18GHz. The equipment is arranged to facilitate accurate testing of radiated emissions at higher frequencies.

Radiation Emission Test Setup (Above 18GHz)

This section presents the test setup utilized for radiation emission measurements at frequencies exceeding 18GHz. The configuration is designed for testing radiated emissions at very high frequency ranges.

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