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43 Cards in this Set
- Front
- Back
Of the two terms listed below,
which one refers to reflection of radio signals back to earth by a satellite? |
1. Active
2. Passive |
|
Which term refers to reception
and retransmission? |
1. Active
2. Passive |
|
Which of the following terms
refers to transmissions received from a satellite? |
1. Uplink
2. Downlink 3. Modelink 4. Backlink |
|
SATCOM links are only slightly
affected by what phenomena associated with hf propagation difficulties? |
1. Atmospheric
2. Cosmic 3. Siezemic 4. Vortic |
|
Trained crews can set up what
type of satellite earth terminals within hours to establish communications in remote areas? |
1. Crisis
2. Defensive 3. Mobile 4. Partial |
|
Of the following factors,
which, if any, limit the use of a satellite communications system? |
1. Orbital parameters and
technical characteristics 2. Transmitter power and receiver sensitivity 3. Both 1 and 2 4. None of the above |
|
What purpose does
CUDIXS/NAVMACS serve? |
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 |
|
How many NCTAMS have primary
responsibility for communications via satellite? |
1. One
2. Two 3. Three 4. Four |
|
Subsystems consist of two
parts. What are they? |
1. Baseband equipment; rf
terminal 2. Multiplexing equipment; satellite 3. Satellite; rf terminal 4. Transmitters; receivers |
|
In modes 1 through 6, what are
the uplink and downlink frequency bands used in Fleet Satellite Broadcast? |
1. Hf; shf
2. Uhf; hf 3. Uhf; shf 4. Shf; uhf |
|
What system do subscribers use
to receive Fleet Satellite Broadcast? |
1. AN/BRA-1
2. AN/FRT-1 3. AN/SSR-1 4. AN/VRC-1 |
|
What is the minimum number of
broadcast channels that NAVMACS guards automatically? |
1. One
2. Two 3. Three 4. Four |
|
What is the bandwidth (in kHz)
of the satellite channels allocated to CUDIXS/NAVMACS? |
1. 10
2. 15 3. 20 4. 25 |
|
What term is associated with a
submarine commander’s ability to receive messages via satellite at scheduled intervals? |
1. Group broadcasts
2. Interval broadcasts 3. Network broadcasts 4. Timed broadcasts |
|
Secure voice uses digitized
voice with a 3-kHz voice channel. What type of voice modulation does this describe? |
1. Multiband
2. Narrowband 3. Singleband 4. Wideband |
|
When using Secure Voice, a ship
must contact what authority before initiating communications with a shore command? |
1. Fleet controller
2. Group controller 3. Net controller 4. Voice controller |
|
Which of the following is a
subsystem specifically designed for special intelligence communications? |
1. OTCIXS
2. TADIXS 3. TACINTEL 4. FLTSATCOM |
|
TADIXS-equipped surface ships
and submarines operate in what mode(s)? |
1. Receive only
2. Transmit only 3. Transmit and receive |
|
What subsystem is used in
conjunction with TADIXS to transmit OTH-T data from the fleet to other ships and shore commands? |
1. OTCIXS
2. SSIXS 3. TACINTEL 4. FLTSATCOM |
|
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? |
1. Emission control
2. Emission quiet 3. Transmit control 4. Transmit quiet |
|
What system was developed to
multiplex several users on one 25-kHz satellite channel? |
1. MSAS
2. DAMA 3. VINSON 4. NCTAMS |
|
What term is used to describe
how the Demand Assigned Multiple Access data stream is formatted? |
1. Frame
2. Picture 3 Segment 4. Window |
|
In the DAMA multiplexed data
stream, which slot is used to test for communications error? |
1. Data
2. Link 3. Ranging 4. Return channel |
|
What are all DAMA multiplexer
transmit times referenced to? |
1. The controller
2. The satellite 3. The transmitter 4. The Vocoder |
|
Which of the following
equipments is used as the DAMA multiplexer? |
1. DM-1217B/U
2. TD-1271B/U 3. DM-1271B/U 4. TD-1217B/U |
|
Who performs day-to-day control
and operation of naval satellite communications assets? |
1. Chief of Naval Operations
2. Satellite Operations Command 3. Naval Space Command 4. Naval Computer and Telecommunications Command |
|
Of the 23 uhf communications
channels each FLTSATCOM satellite has, how many one dedicated to Navy use? |
1. 1
2. 5 3. 10 4. 15 |
|
How many FLTSATCOM satellites
have ehf packages installed? |
1. One
2. Two 3. Three 4. Four |
|
LEASAT satellites have fewer
25-kHz channels than FLTSATs. What ground-based system do they use to maintain communications efficiency? |
1. DAMA
2. MSAS 3. PSAS 4. VINSON |
|
What is the replacement
satellite for GAPFILLER, FLTSATCOM, and LEASAT? |
1. UHF F/O
2. UFO F/O 3. SHF F/O 4. SRP F/O |
|
The AN/FSC-79 satellite
communications terminal transmits on what band? |
1. Ehf
2. Hf 3. Shf 4. Uhf |
|
Which of the following is
another term used to describe the shf communications band? |
1. A-band
2. S-band 3. U-band 4. X-band |
|
The AN/WSC-5(V) uhf transceiver
is capable of using differentially encoded phaseshift- keying and what other type of modulation? |
1. AM
2. CW 3. FM |
|
Which of the following radios
is the primary shipboard los and satellite transceiver? |
1. AN/WSC-3
2. AN/WCS-3 3. AN/WSC-5 4. AN/WCS-5 |
|
The AN/WSC-3 transceiver has
two rf output levels. One of these is 30 watts. What is the other rf output level? |
1. 50 watts
2. 100 watts 3. 150 watts 4. 200 watts |
|
What shipboard system is used
to receive Fleet Satellite Broadcast? |
1. AJS/BRC-1
2. AN/SRR-1 3. AN/SSR-1 4. AN/BRR-1 |
|
Which of the following is a
spread spectrum type modem and is used with the AN/FSC-79 satellite communications terminal? |
1. OM-33A/USC
2. OM-43A/USC 3. OM-51A/FR 4. OM-61A/FR |
|
Of the two processors listed
below, which one is used in the TADIXS subsystem? |
1. AN/UYK-20(V)
2. AN/UYK-44(V) |
|
The AN/USQ-69(V) data terminal
set is currently used with what two subsystems? |
1. SSIXS/OTCIXS
2. TACINTEL/NAVMACS 3. NAVMACS/TADIXS 4. OTCIXS/TADIXS |
|
Audio digital converter
CV-3333/U is used primarily as an analog-to-digital converter for what type of communications? |
1. Analog voice
2. Crypto voice 3. Secure voice 4. Unsecured voice |
|
Where are the system interface
connectors installed on the Electrical Equipment Rack CY-7597/WSC-3? |
1. On the back panel
2. On the front panel 3. On the side panel 4. On the top panel |
|
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? |
1. 11
2. 12 3. 13 4. 14 |
|
NEVEDTRA 14088
ELECTRONICS TECHNICIAN VOLUME 03 COMMUNICATIONS SYSTEMS CHAPTER 3 |
NEVEDTRA 14088
ELECTRONICS TECHNICIAN VOLUME 03 COMMUNICATIONS SYSTEMS CHAPTER 3 |