Operators Manual
Safety Information
M55-ML3-UG, Rev A
8
3.4. Health & Safety
Exposure to Non-Ionizing (RF) Radiation/Safe Working Distances
The safe working distance from a transmitting antenna may be calculated from the
relationship:
D =
in which D = safe working distance (meters)
PT = transmitter or combiner power output (watts)
GR = antenna gain ratio = anti log (gain dBi ÷10)
w = Maximum allowed power density (watts/square meter)
The RF power density value is determined by reference to safety guidelines for exposure
of the human body to non-ionizing radiation. It is important to note that the guidelines
adopted differ throughout the world and are from time-to-time re-issued with revised
guidelines. For VISLINK use, a maximum power density limit (w) of 1w/m² is to be applied
when calculating minimum safe working distances. Appendix A refers.
WARNING: Any transmitting equipment, radiating power at frequencies of 100
kHz and higher, has the potential to produce thermal and athermal effects upon
the human body.
To be safe:
• Operators should not stand or walk in front of any antenna, nor should they allow
anyone else to do so.
• Operators should not operate any RF transmitter or power amplifier with any of its
covers removed, nor should they allow anyone else to do so.
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