Nevedtra 14088, Electronics Technician Volume 03- Communications Systems; Chapter 3

Front 1

Of the two terms listed below,
which one refers to reflection
of radio signals back to earth
by a satellite?

Back 1

1. Active
2. Passive

Front 2

Which term refers to reception
and retransmission?

Back 2

1. Active
2. Passive

Front 3

Which of the following terms
refers to transmissions
received from a satellite?

Back 3

1. Uplink
2. Downlink
3. Modelink
4. Backlink

Front 4

SATCOM links are only slightly
affected by what phenomena
associated with hf propagation
difficulties?

Back 4

1. Atmospheric
2. Cosmic
3. Siezemic
4. Vortic

Front 5

Trained crews can set up what
type of satellite earth
terminals within hours to
establish communications in
remote areas?

Back 5

1. Crisis
2. Defensive
3. Mobile
4. Partial

Front 6

Of the following factors,
which, if any, limit the use of
a satellite communications
system?

Back 6

1. Orbital parameters and
technical characteristics
2. Transmitter power and
receiver sensitivity
3. Both 1 and 2
4. None of the above

Front 7

What purpose does
CUDIXS/NAVMACS serve?

Back 7

1. Provides extension to
terrestrial teletypewriter
network
2. Provides a communications
link between submarines and
shore terminals
3. Provides a communications
network for transmitting
general-service message
traffic between ships and
shore installations

Front 8

How many NCTAMS have primary
responsibility for
communications via satellite?

Back 8

1. One
2. Two
3. Three
4. Four

Front 9

Subsystems consist of two
parts. What are they?

Back 9

1. Baseband equipment; rf
terminal
2. Multiplexing equipment;
satellite
3. Satellite; rf terminal
4. Transmitters; receivers

Front 10

In modes 1 through 6, what are
the uplink and downlink
frequency bands used in Fleet
Satellite Broadcast?

Back 10

1. Hf; shf
2. Uhf; hf
3. Uhf; shf
4. Shf; uhf

Front 11

What system do subscribers use
to receive Fleet Satellite
Broadcast?

Back 11

1. AN/BRA-1
2. AN/FRT-1
3. AN/SSR-1
4. AN/VRC-1

Front 12

What is the minimum number of
broadcast channels that NAVMACS
guards automatically?

Back 12

1. One
2. Two
3. Three
4. Four

Front 13

What is the bandwidth (in kHz)
of the satellite channels
allocated to CUDIXS/NAVMACS?

Back 13

1. 10
2. 15
3. 20
4. 25

Front 14

What term is associated with a
submarine commander’s ability
to receive messages via
satellite at scheduled
intervals?

Back 14

1. Group broadcasts
2. Interval broadcasts
3. Network broadcasts
4. Timed broadcasts

Front 15

Secure voice uses digitized
voice with a 3-kHz voice
channel. What type of voice
modulation does this describe?

Back 15

1. Multiband
2. Narrowband
3. Singleband
4. Wideband

Front 16

When using Secure Voice, a ship
must contact what authority
before initiating
communications with a shore
command?

Back 16

1. Fleet controller
2. Group controller
3. Net controller
4. Voice controller

Front 17

Which of the following is a
subsystem specifically designed
for special intelligence
communications?

Back 17

1. OTCIXS
2. TADIXS
3. TACINTEL
4. FLTSATCOM

Front 18

TADIXS-equipped surface ships
and submarines operate in what
mode(s)?

Back 18

1. Receive only
2. Transmit only
3. Transmit and receive

Front 19

What subsystem is used in
conjunction with TADIXS to
transmit OTH-T data from the
fleet to other ships and shore
commands?

Back 19

1. OTCIXS
2. SSIXS
3. TACINTEL
4. FLTSATCOM

Front 20

Because the reception of TADIXS
information by a ship does not
require an acknowledgement, the
ship can l operate in what type
of environment and still
receive message traffic?

Back 20

1. Emission control
2. Emission quiet
3. Transmit control
4. Transmit quiet

Front 21

What system was developed to
multiplex several users on one
25-kHz satellite channel?

Back 21

1. MSAS
2. DAMA
3. VINSON
4. NCTAMS

Front 22

What term is used to describe
how the Demand Assigned
Multiple Access data stream is
formatted?

Back 22

1. Frame
2. Picture
3 Segment
4. Window

Front 23

In the DAMA multiplexed data
stream, which slot is used to
test for communications error?

Back 23

1. Data
2. Link
3. Ranging
4. Return channel

Front 24

What are all DAMA multiplexer
transmit times referenced to?

Back 24

1. The controller
2. The satellite
3. The transmitter
4. The Vocoder

Front 25

Which of the following
equipments is used as the DAMA
multiplexer?

Back 25

1. DM-1217B/U
2. TD-1271B/U
3. DM-1271B/U
4. TD-1217B/U

Front 26

Who performs day-to-day control
and operation of naval
satellite communications
assets?

Back 26

1. Chief of Naval Operations
2. Satellite Operations Command
3. Naval Space Command
4. Naval Computer and
Telecommunications Command

Front 27

Of the 23 uhf communications
channels each FLTSATCOM
satellite has, how many one
dedicated to Navy use?

Back 27

1. 1
2. 5
3. 10
4. 15

Front 28

How many FLTSATCOM satellites
have ehf packages installed?

Back 28

1. One
2. Two
3. Three
4. Four

Front 29

LEASAT satellites have fewer
25-kHz channels than FLTSATs.
What ground-based system do
they use to maintain
communications efficiency?

Back 29

1. DAMA
2. MSAS
3. PSAS
4. VINSON

Front 30

What is the replacement
satellite for GAPFILLER,
FLTSATCOM, and LEASAT?

Back 30

1. UHF F/O
2. UFO F/O
3. SHF F/O
4. SRP F/O

Front 31

The AN/FSC-79 satellite
communications terminal
transmits on what band?

Back 31

1. Ehf
2. Hf
3. Shf
4. Uhf

Front 32

Which of the following is
another term used to describe
the shf communications band?

Back 32

1. A-band
2. S-band
3. U-band
4. X-band

Front 33

The AN/WSC-5(V) uhf transceiver
is capable of using
differentially encoded phaseshift-
keying and what other
type of modulation?

Back 33

1. AM
2. CW
3. FM

Front 34

Which of the following radios
is the primary shipboard los
and satellite transceiver?

Back 34

1. AN/WSC-3
2. AN/WCS-3
3. AN/WSC-5
4. AN/WCS-5

Front 35

The AN/WSC-3 transceiver has
two rf output levels. One of
these is 30 watts. What is the
other rf output level?

Back 35

1. 50 watts
2. 100 watts
3. 150 watts
4. 200 watts

Front 36

What shipboard system is used
to receive Fleet Satellite
Broadcast?

Back 36

1. AJS/BRC-1
2. AN/SRR-1
3. AN/SSR-1
4. AN/BRR-1

Front 37

Which of the following is a
spread spectrum type modem and
is used with the AN/FSC-79
satellite communications
terminal?

Back 37

1. OM-33A/USC
2. OM-43A/USC
3. OM-51A/FR
4. OM-61A/FR

Front 38

Of the two processors listed
below, which one is used in the
TADIXS subsystem?

Back 38

1. AN/UYK-20(V)
2. AN/UYK-44(V)

Front 39

The AN/USQ-69(V) data terminal
set is currently used with what
two subsystems?

Back 39

1. SSIXS/OTCIXS
2. TACINTEL/NAVMACS
3. NAVMACS/TADIXS
4. OTCIXS/TADIXS

Front 40

Audio digital converter
CV-3333/U is used primarily as
an analog-to-digital converter
for what type of communications?

Back 40

1. Analog voice
2. Crypto voice
3. Secure voice
4. Unsecured voice

Front 41

Where are the system interface
connectors installed on the
Electrical Equipment Rack
CY-7597/WSC-3?

Back 41

1. On the back panel
2. On the front panel
3. On the side panel
4. On the top panel

Front 42

DAMA-equipped shore
installations use the OK-
481(V)2/FSC Control Monitor
Group to interface TD-1271B/Us,
AN/WSC-5(V)s, and baseband
equipment. It can accommodate
up to how many TD-1271B/Us?

Back 42

1. 11
2. 12
3. 13
4. 14

Front 43

NEVEDTRA 14088
ELECTRONICS TECHNICIAN VOLUME 03
COMMUNICATIONS SYSTEMS
CHAPTER 3

Back 43

NEVEDTRA 14088
ELECTRONICS TECHNICIAN VOLUME 03
COMMUNICATIONS SYSTEMS
CHAPTER 3