12
2-18. Transmitting antenna patch panels are
interlocked with the transmitter for which
of the following reasons?
1. Safety
2. Ease of operation
3. Ease of maintenance
4. Both 2 and 3 above
2-19. A transmit multicoupler provides which
of the following functions?
1. Receiver isolation
2. Transmitter tuning
3. Additional amplification
4. Isolation between transmitters
2-20. In a manual telegraph circuit, the only
two conditions are marking and spacing.
Marking is characterized by which of the
following descriptions?
1. The key is open
2. Current is flowing
3. Current is not flowing
4. The armature is retracted by a spring
2-21. A teletypewriter code signal consists of 7
units. Of the following functions, which
describes the middle 5 units?
1. Provides channel data
2. Carries the intelligence
3. Signals stop information
4. Signals start information
2-22. Which of the following terms describe
the time between a space and mark or
mark and space condition in a
teletypewriter?
1. Movement
2. Variation
3. Transition
4. Character interval
2-23. The time interval between words when
using the Morse code is equal to which
of the following durations?
1. 1 dot
2. 7 dots
3. 3 dashes
4. 5 dashes
2-24. When you are using the five-unit code in
teletypewriter operation, what is the
maximum number of combinations
available that will print letters, figures,
function signs, and numerals?
1.
30
2.
32
3.
60
4.
74
2-25. When you are using the teletypewriter
five-unit code, which of the following
signals are used to increase the printing
capacity of the equipment?
1. Inverter
2. Combiner
3. Case-shift
4. Type-adjust
2-26. Which, if any, of the following modes of
teletypewriter operation is more often
used in high-speed data systems?
1. Start-stop
2. Synchronous
3. Asynchronous
4. None of the above
2-27. In teletypewriter operation, what term
defines the length of time required to
transmit one letter, figure, function sign
or numeral?
1. Baud rate
2. Bit speed
3. Code length
4. Character interval
