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Antenna Control <br /> Pushbutton Control <br /> A.11 antenna controls, as .all controls_ ,.�.shall, be commanded from the central- <br /> pushbutton control console.: <br /> Antenna Elevation <br /> Antenna elevation shall be controlled by an up-down selection button pair <br /> capable of incrementing the -antenna in one-degree increments. <br /> RHI Scan <br /> The RHI scan feature shall be selected by a single pushbutton stroke. The RHI <br /> scan shall be automatic and consist of a range from 0' to 60' elevation. The j <br /> RHI scan mode must be selectable at any antenna azimuth location. Normal <br /> antenna rotation and controls shall be returned by an additional single <br /> keystroke. <br /> Sector Scan <br /> I <br /> • The antenna azimuth sector scan feature shall be initiated by a multiple <br /> keystroke sequence starting with the desired sector scan center azimuth and <br /> fol.Lowed by the scan width. Normal antenna rotation shall be resumed by a <br /> single keystroke. <br /> Antenna Direction <br /> Clockwise and counterclockwise antenna rotation shall be selectable by single <br /> keystrokes. <br /> i <br /> stop <br /> The antenna control section shall incorporate a Stop button which shall stop <br /> antenna rotation and elevation instantly. <br /> I <br /> Antenna Speed Selection <br /> The antenna control section will contain three separate buttons to select the <br /> approximate antenna rotation speeds of two, four and eight rpm. <br /> I <br /> I <br /> -5- <br />