Communications

Front 1

This switchboard
contains 10 seven-position switches. Each
switch corresponds to a remote control station and
each switch position (1 through 5) represents a receiver

Back 1

receiver switchboard

Front 2

One station transmits to the satellite on the
frequency. The satellite translates the signal to
the frequency, amplifies the signal, then
transmits it to the receiving terminal.

Back 2

uplink
downlink

Front 3

SATCOM links are part of what system?

Back 3

Defense Satellite Communications System (DSCS)
and Fleet Satellite Communications

Front 4

Unique advantages SATCOM has over conventional long-distance communications are?

Back 4

1. unaffected by the propagation problems
2.free from the high attenuation problems of facilities that use wire or cable for routing comms.
3. Span long distances
4. Numerous repeater stations required for LOS and troposcatter systems are not
needed.

Front 5

SATCOM reliability is based on what?

Back 5

skill of operators and maintenance personnel and the
condition of the satellite communications equipment.

Front 6

How is SATCOM better for vulerability?

Back 6

1. difficult and expensive tp destroy satellites.
2. provide a high degree of freedom from jamming.

Front 7

What is the major limitations of Satellite communications?

Back 7

1. technical characteristics of the satellite and its
orbital parameters.
2. transmitter power and
receiver sensitivity

Front 8

What happens when users who increase their output power
to the satellite?

Back 8

the satellite to try to retransmit at the new power level, at the expense of reducing signals to other users.

Front 9

FLTSATCOM System provides communications worldwide coverage between what latitudes?

Back 9

70 degrees N & 70 degrees S

Front 10

Three satellites are currently in use, what are they? Fourth one coming online soon?

Back 10

GAPFILLER, LEASAT,& FLTSATCOM.

UHF Follow-on (UFO)

Front 11

Navy SATCOM system consists of
information exchange subsystems that use the
satellites as what 2 reasons?

Back 11

(1) relays for communications and control.
(2) quality monitoring subsystems that provide
data required to manage satellite resources

Front 12

This is an expansion of the “Fleet Broadcast,” which has been the central communications medium for
operating naval units.

Back 12

Fleet Satellite Broadcast Subsystem

Front 13

What is CUDIXS?

Back 13

Common User Digital Information Exchange
Subsystem

Front 14

What is NAVMACS?

Back 14

Navy Modular Automated Communications Subsystem

Front 15

CUDIX and NAVMACS are two installations that form a
communications network for transmitting what?

Back 15

general-service message traffic between ships
and shore installations