1-19. A complex of links make up a major
communications system. The naval
communications system is further broken
down into what two groups?
1. Strategic and local
2. World-wide and local
3. Strategic and tactical
4. Tactical and world-wide
1-20. Communications links have many modes
of operation. One terminal in a link has
its equipment setup in simplex. The
other terminal is using two channels or
frequencies in a configuration that allows
sending and receiving of different
messages at the same time. These two
terminals working together make up what
mode of operation?
1. Full duplex
2. Half duplex
1-21. What communications link mode of
operation provides telecommunications
capability between stations at the same
time in both directions?
1. Half duplex
1-22. Aid in restoring downed fleet
communications channels is furnished on
a not-to-interfere basis by which of the
1-23. Which of the following switched
networks extends tactical voice to shore-
based operational commands?
1-24. Of the following transmitter types, which
are used for basic communications?
1. Cw, AM, fm, and ssb
2. Fsk, cw, AM, and tty
3. Cw, ssb, voice and fm
4. Voice, tty, fsk, and AM
1-25. Cw transmissions have narrow
bandwidths and a high degree of
intelligibility under severe noise
conditions. What is the primary Navy
use for cw?
1-26. A cw transmitter must contain which of
the following components?
1. A traveling-wave tube
2. A demodulator
3. A combiner
4. A keyer
1-27. In a cw transmitter, a buffer stage
performs which of the following
1. Current divider
2. Voltage divider
3. Current amplifier
4. Voltage amplifier