Chapter 6 — RADAR AND SATELLITE EQUIPMENT 



of 360 degrees, and elevation capability of -2 

 to +60 degrees. 



Component Parts 



The AN/FPS-106(V) consists of a receiver- 

 transmitter group, a control indicator group, 

 a choice of two antenna systems, depending on 

 the type installation, fixed or mobile, and two 

 radomes. (See figure 6-5.) 



ANTENNA ASSEMBLIES. — Both antenna as- 

 semblies are electrically similar, but in size 

 they differ. The fixed installation antenna is 

 eight feet in diameter and is used with both 

 the AN/FPS-81 and AN/FP3-106(V) radars. The 

 mobile van antenna is only six feet in diameter 

 and cannot be utilized with the AN/FPS-81 

 radar set. 



RADOMES. — The fixed installation radome 

 consists of rigid segments held together with 

 bolts. A ventilator and lightning rod are mounted 

 on top of the radome providing ventilation and 

 lightning protection. The mobile radome differs 

 from the fixed radome in that it consists of 

 fewer rigid segments, and a segment cover. 

 A lightning rod is provided, but it is not venti- 

 lated. 



RECEIVER-TRANSMITTER. — The RT group 

 generates the pulses and processes the return 

 signal. 



METEOROLOGICAL CONTROL-INDICA- 

 TOR. — The Meteorological Control-Indicator 

 group (fig. 6-6) displays the received signals 

 in the form of azimuth, range, and elevation 

 information. All operating controls for the radar 

 set are located on the front panels. 



Operational Procedures 



The initial energization and deenergization 

 are too lengthy for coverage in this manual 

 and are not generally performed by the AG 

 but by the Electronic Technicians attached to 

 the unit. Refer to NAVAIR 50-30FP3-106-1 Man- 

 ual for description of the procedures in the 

 event that no technicians are available. 



Operator Maintenance 



In order to maintain a normal equipment op- 

 eration with a minimum of interruption, op- 

 erating personnel will check items on a daily 



basis. These item?, are outlined in the main- 

 tenance manual. The regular practice of these 

 procedures will enable the operators to notice 

 minor deviations from the normal operations. 

 In the event deviations occur, operating per- 

 sonnel will immediately notify the maintenance 

 personnel so that the minor deviations can be 

 remedied before they become major problems. 



RADAR FACSIMILE RECORDER 

 AN/GMH-6( ) 



The Radar Facsimile Recorder AN/GMH-6( ) 

 is illustrated in figure 6-7. 



TMs facsimile recorder is used to copy 

 weather data transmitted from the radar /trans- 

 mitter site where the transmitting device hori- 

 zontally scans a Plan Position Indicator (PPI) 

 radar scope. The data is then transmitted via 

 telephone line to the recorder. The recorder 

 provides a hard copy printout of the weather 

 pictures, including "data insert information" 

 on a continuous roll of electrolytic paper. Tie 

 data insert information consists of automatic 

 printing of a time-date code, indicating the day 

 of the year and the time of the day that the 

 particular picture was received and printed. 



The recorder has controls that determine 

 the frequency at which consecutive groups of 

 pictures are printed, A group may consist of 

 1, 2, or 3 pictures. The period between the 

 groups may vary to an infinite number of min- 

 utes. A period in this case refers to the length 

 of time from the end of the picture of a con- 

 secutive group to the beginning of the first 

 picture in the following consecutive group. 



Controls are also provided for the adjust- 

 ment of printing quality, such as degree of 

 contrast and whiteness. Other controls set the 

 time and data information printed on each weather 

 picture. 



As illustrated in figure 6-7, the facsimile 

 recorder consists of the electronic chassis, and 

 the recorder head (printing display area and 

 paper takeup) which are mounted in and on, 

 respectively, one metal console. The console 

 rests on four swivel casters, to permit mo- 

 bility. The two front casters can be locked to 

 fix the console in a stationary position. The 

 electronic chassis is a slide-mounted pullout 

 drawer which provides for easy removal, serv- 

 icing, cleaning, and testing of the chassis. The 

 electronic chassis contains all operating con- 

 trols, fuses, and indicators for the facsimile 

 recorder, except the paper take-up switch and 

 fuse, the paper supply indicating light, and the 



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