. An elementary manual of radiotelegraphy and radiotelephony for students and operators . Fig. 2. kind, called a sine curve, may be constructed in the followingmanner. ^ Take any line OX on which to mark off time (see Fig. 3), andwith 0 as centre describe a circle with diameter AB. Divide its. DX Fig. 3. circumference into 12 parts, and through these points drawhorizontal ines. Take any length BD on the horizontal line anddivide It a so into 12 parts and through these points draw linesperpendicular to OX to intersect the horizontal lines drawnthrough the 12 points on the circumference of the c
. An elementary manual of radiotelegraphy and radiotelephony for students and operators . Fig. 2. kind, called a sine curve, may be constructed in the followingmanner. ^ Take any line OX on which to mark off time (see Fig. 3), andwith 0 as centre describe a circle with diameter AB. Divide its. DX Fig. 3. circumference into 12 parts, and through these points drawhorizontal ines. Take any length BD on the horizontal line anddivide It a so into 12 parts and through these points draw linesperpendicular to OX to intersect the horizontal lines drawnthrough the 12 points on the circumference of the circle. Thenmark dots at the intersections of the corresponding vertical andliorizontal line, that is, at the intersection of horizontal linethrough point 1 on the circle with the vertical line throucrhpoint 1 on the time line, and so on. Through the twelve J^A DIO TELEGRA PHY4 intersection points draw a wavy ciirve. This curve is called asine curve, because its ordinate TM is proportional to the sineof its abscissa MB. reckoning tlie whole length LD as divided into360 parts or degrees. Thus if liM is ^ ot U), the ordinate PMat that point I\l is proportional to the sine ot the angle ot oO oris 0-5 and on the same scale that the maximum ordinate of thecurve is taken as unity. This maximu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1916
