1-48.
1-49.
1-50.
1-51.
1-52.
Multiplexing data being transmitted over a
communications channel performs which
of the following functions?
1. It increases the baud rate
2. It allows multiple users of the same
channel
3. Either 1 and 2 above
4. It changes the carrier frequency
Which of the following multiplexing
methods divide(s) the asynchronous
message into a fixed number of time
slots?
1. Time division
2. Frequency division
3. Both 1 and 2 above
4. Quadrature phase-shift
Which of the following multiplexing
methods transmits several tones over a
single communications channel?
1. Time division
2. Frequency division
3. Both 1 and 2 above
4. Quadrature phase-shift
Link-11 is designated as which of the
following types of tactical data
information link?
1. TADIL A
2. TADIL C
3. TADIL J
4. Teletype
Link-11 communications can operate with
which of the following radios?
1. HF only
2. UHF only
3. Either HF or UHF
4. VHF only
1-53.
When Link-11 is operated with UHF
radio, it is capable of over-the-horizon
communications.
1. True
2. False
IN ANSWERING QUESTIONS 1-54 THROUGH
1-61, SELECT FROM THE FOLLOWING LIST
THE EQUIPMENT THAT PERFORMS THE
FUNCTION DESCRIBED IN THE QUESTION.
ITEMS IN THE LIST MAY BE USED MORE
THAN ONCE.
A.
B.
C.
D.
E.
F .
CDS Digital Computer
SGS Computer
Cryptographic Device
Data Terminal Set
Communications Switchboard
Radio Set
1-54.
Selects the HF or the UHF transceiver.
1 . B
2 . C
3 . D
4 . E
1-55.
Encrypts parallel data from the CDS
computer and passes the encrypted data to
the data terminal set.
1 . A
2 . B
3 . C
4 . D
1-56.
Correlates reported positions of local and
remote tracks.
1 . A
2 . B
3 . C
4 . D
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