Teledyne 7 RU Chassis, Operation Manual, Page: 13 / 144

Operations Manual, 7RU SSPA Chassis 208528 REV M 13
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Operators should be familiar with procedures to employ in the event of an
emergency, i.e., remove all power, CPR, etc.
An AC powered unit will have 115 VAC or 230 VAC entering through the AC power
connector. Caution is required when working near this connector, the AC circuit breaker, or
the internal power supply.
1.7.2 High Current Hazards
Many high power devices are capable of producing large surges of current.
This is true at all voltages, but needs to be emphasized for low voltage
devices. Low voltage devices provide security from high voltage hazards, but
also require higher current to provide the same power. High current can
cause severe injury from burns and explosion. The following precautions
should be taken on devices capable of discharging high current:
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Remove all conductive personal items (rings, watches, medals, etc.)
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The work area should be secure and free of non-essential items.
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Wear safety glasses and protective clothing.
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Operators should never work alone on high risk devices. There should always
be another person present in the same work area to assist in the event of an
emergency.
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Operators should be familiar with procedures to employ in the event of an
emergency, i.e., remove all power, CPR, etc.
Warning! Large DC currents are generated to operate the RF Module
inside of the enclosure. Extreme caution is required when the enclosure is
open and the amplifier is operating. DO NOT TOUCH any of the connec-
tions on the RF modules when the amplifier is operating. Currents in
excess of 60 Amperes may exist on any one connector.
1.7.3 RF Transmission Hazards
RF transmissions at high power levels may cause eyesight damage and skin
burns. Prolonged exposure to high levels of RF energy has been linked to a
variety of health issues. Use the following precautions with high levels of RF
power.
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Always terminate the RF input and output connectors prior to applying prime AC
input power.
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Never look directly into the RF output waveguide
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Maintain a suitable distance from the source of the transmission such that the
power density is below recommended guidelines in ANSI/IEEE C95.1. The
power density specified in ANSI/IEEE C95.1-1992 is 10 mW/cm2. These
requirements adhere to OSHA Standard 1910.97.
When a safe distance is not practical, RF shielding should be used to achieve the
recommended power density levels.