Emi Prevention; Laser Safety - H3C WX3000 Installation Manual

Figure 2-1 Wear an ESD-preventive wrist strap

EMI Prevention

All interference sources, from the outside or inside of the device and application system, adversely
affect the device in the conduction patterns of capacitance coupling, inductance coupling,
electromagnetic wave radiation, and common impedance (including grounding system) coupling, and
cable conduction (including power cables, signal cables and output cables). To prevent interference, do
the following:
Use a TN system for the system earthing of the AC power supply, and use a single-phase
three-wire AC socket with a protection earth (PE) to effectively filter interference from the power
grid.
Keep the device away from high-power radio transmitters, radars, and high-frequency
heavy-current devices.
Take electromagnetic shielding measures when necessary. For example, use shielded interface
cables.
Route the interface cables only indoors to protect signal interfaces against over-voltage or
over-current conditions cause by lightning strikes.

Laser Safety

The WX3000 series is the Class 1 laser product.
Do not look directly at any working optical transceivers on the WX3000 series because the high-energy
laser beam emitted from the optical fiber may hurt your eyes.
Staring into the laser beam emitted from an optical fiber may hurt your eyes.
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