PULSE AMPLIFIER/SYMBOL GENERATOR (PA/SG)

STANDARD CIRCLES MESSAGE.– This message is used to display one of the 13 types of standard circles. The X/Y coordinate word specifies the center of the circle and the V/C word defines the type of circle and therefore its diameter. The standard circles message may be addressed to a particular console. PROGRAMMABLE CIRCLES AND ELLIPSES MESSAGE.— This message generates up to 512 different diameter circles and ellipses. The circle message consists of a circle word (modified DC/DU coordinate word) which defines the A and B radius of the circle, an X/Y coordinate word that defines the center of the circle, and a V/C word that defines the type of circle. The ellipse message consists of two ellipse words that define the major and minor axis and angle of inclination of the ellipse, an X/Y coordinate word that defines the center of the ellipse and a V/C word that defines the type of ellipse. Both programmable circle and ellipse messages may be addressed to a particular console. OFFSET MESSAGE.– The offset message offsets the display of sweep and symbols to any position on the CRT if the console operator has selected OFFSET on his console. The X/Y coordinate word indicates the amount of offset to the addressed console. PULSE AMPLIFIER/SYMBOL GENERATOR (PA/SG) The PA/SG is actually two pieces of equipment in one cabinet. Several different configurations of this equipment are available and the one installed with your system is dependant on the type of display consoles on the ship. The basic AN/UYA-4(V) system uses the PA/SG configuration. Systems with the CIGARS modification installed will have the pulse amplifier but not the symbol generator. Systems with CIGARS and direct computer interface (DCI) will not have a PA/SG. Figure 3-13.—Display messages. Pulse Amplifier The pulse amplifier (PA) provides for the amplification and distribution of computer input and output data between the display consoles and the 3-10