1-26.
1-27.
1-28.
1-29.
1-30.
The very-low-frequency receive
system is designed to receive
what types of signals?
1.
AM and FM
2.
FSK and CW
3.
FSK and ICW
4.
SSB and FSK
The AN/FRT-72 (if) transmitter
is used to provide (a) how many
channels of frequency-division
multiplex rtty traffic over (b)
what type of fleet broadcast
system at (c) what type of
power?
1. (a) Eight (b) multichannel
(c) high
2. (a) Eight (b) singlechannel
(c) high
3. (a) Four (b) multichannel
(c) low
4. (a) Four (b) multichannel
(c) high
HF communications from shore-
based transmitters to ships at
sea using frequency and space
diversity is an example of which
of the following types of
systems?
1.
Fleet broadcast
2.
Point-to-point
3.
Ground-to-air
4.
ship-to-shore
Which one of the following
equipment would you use to match
a transmitter’s output impedance
to an antenna’s input impedance?
1.
CV-2460
2.
SB-988/SRT
3.
AN/UCC-1
4.
AN/URA-38
The AN/VRC-80 is not just a vhf
transmitter or receiver. What
is the name given to a piece of
equipment that performs both
functions?
1.
Transducer
2.
Multiplexer
3.
Retransmitted
4.
Transceiver
1-31.
1-32.
During UHF secure voice
transmission, the operator uses
a secure voice remote phone
unit. What is the common term
for this unit?
1.
RPS
2.
RPU
3.
SVP
4.
SPU
which of the following
combinations of radio-relay
systems provides (a) one-way
communications and (b) two-way
communications?
1.
(a) Simplex (b) multiplex
2.
(a) Duplex
(b) multiplex
3.
(a) Simplex (b) duplex
4.
(a) Duplex
(b) simplex
1-33 l What term is normally used for
microwave transmitter input
signal?
1.
Baseband signal
2.
Emphasis signal
3.
Insertion signal
4.
Linear signal
1-34.
In a microwave transmitter, the
linearize couples a portion of
the output power back to the
klystron. This allows for
modulation densities as high as
1200 channels and compensates
for what klystron deficiency?
1.
Nonlinearity
2.
Oscillations
3.
Overheating
4.
Selectivity
1-35.
In a typical microwave receiver,
what is the standard
intermediate frequency?
1.
40 MHz
2.
50 MHz
3.
60 MHz
4.
70 MHz
1-36.
Which of the following methods
are usually used for microwave
communications?
1.
Los and troposcatter
2.
Los and satcom
3.
Troposcatter and satcom
4.
Troposcatter and shortwave
3
