SUMMARY

Operator maintenance on the equipment is limited to changing paper and printer ribbons. Instructions are provided on the inside of the printer case. Radiomen and Electronics Technicians perform all other maintenance. Detailed operator instructions are contained in Operator and Maintenance Instructions Teleprinter Set an/UGC-143A(Y). Specific instructions on the use of special message function keys and composing messages for teletype (or radioteletype) transmission are contained in Communications Instructions, Teletypewriter (Teleprinter) Procedures, ACP-126. Q53. Q54. REVIEW QUESTIONS When patching antenna jacks on the AN/SRA-12, which patch must be connected first? What are the two basic types of shipboard radio receivers? Q55. How should a properly tuned signal appear on the CRT window of the CV-483/URA-I7 converter? Q56. What are the two basic types of shipboard teleprinters in use? SUMMARY In this chapter, we have discussed many of the high- speed landline, satellite, and HP radio communications systems currently in use. We have also discussed much of the specialized equipment used as terminals on these communications systems. The specific communications systems and equipment available for use varies greatly from shore stations to ships. Although the systems currently in use are dramatically different and far more technologically advanced than the systems used only 10 years ago, we will see many more changes occurring as newer technology is introduced through early next century. l-46