TM 11-5840-281-12-1
1-13.
SAFETY, CARE, AND HANDLING.
GENERAL
Overexposure to microwave radiation from the ANITPN-18A radar set can result in health hazards (see TB MED 270).
Hazardous radiation power density levels (above 10 milliwatts per square centimeter (mw/cm2)) exist at distances within
80 feet (24.5 m) of the azimuth reflector and 33 feet (10 m) of the elevation reflector when the radar Is In the nonscan
mode. In the scan mode, the main beam output power density level is less than 10 mwlcm2 and is not hazardous.
However, hazardous radiation levels do exist at the azimuth and elevation antenna feed horns and within 6 inches (15
cm) behind and to the left of the elevation antenna reflector.
Do not install the radar set group within 80 feet (24.5 m) of any elevated structure and post rf radiation hazard warning
signs of the formation In AR 385-30 at four points around the radar set group after Installation and before operating.
Do not stand in front of either antenna when it is radiating or within a distance of 12 inches (30 cm) of elevation antenna
when radiating and alert personnel to the potential radiation hazard existing directly behind the elevation antenna.
Radiate only when necessary and do not direct the radiating antenna toward occupied areas within the antenna's
potential hazard range of 80 feet (24.5 m).
Do not use worn or damaged flexible waveguides as they can leak hazardous levels of microwave radiation and avoid
exposure to the open end of a waveguide when it is connected to an operating microwave generator.
Conduct periodic safety briefings, as appropriate, including hazard and control procedures for microwave radiation.
Care should be taken when making settings or adjustment of certain controls. Careless operation or Improper settings
can damage the radar set and injure operating personnel.
The INTENSITY control on both control-indicators should always be full counterclockwise when the radar set is turned on
or shut down to prevent burning holes in the crt coating.
The monitor switch, on the local control monitor panel, should be set to METER CAL position when the radar set is
operating to prevent damage to the meter.
The BITE-AZ TILT switch, on both control-indicators, should be set to AZ TILT position to prevent Incorrect readings on
the AZ TILTIBITE meter during normal operations.
Section III TECHNICAL PRINCIPLES OF OPERATION
Subject
Para
Page
System Principles of Operation ........................................................................................ 1-14
Component Principles of Operation .................................................................................. 1-15
1-14
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