Annex E07 Satellite Earth Terminals

Question 0

High Power Amplifier

Answer 0

Boosts uplink to enable antenna to reach the satellite

Question 1

Antenna Control Unit (ACU)

Answer 1

Performs satellite acquisition and tracking

Question 2

Low Noise Block Downconverter

Answer 2

Used in receiving downlink from satellite
Combination of low noise amp and freq mixer
Receives downlink, amps it, downconverts the block of freqs to a lower block usable by the modem

Question 3

Block Upconverter

Answer 3

Used in the xmt of uplinks

Converts a band of freqs from a lower freq to higher freq usable by the satellite

Question 4

Modem

Answer 4

Converts data into binary form and back

Question 5

Point to Point (PTP) SATCOM

Answer 5

• Each terminal combines info to be sent to distant end into a single output and xmts it to the satellite

Question 6

Hub-Spoke SATCOM

Answer 6

Outgoing signals from the hub terminal to all distant end terminals are combined and transmitted at the same center frequency, all distant end terminals receive the same signal after the satellite retransmits it

Question 7

Mesh SATCOM

Answer 7

Similar to hub and spoke however the signals received by terminals with multiple distant ends include info intended for other terminals, in that case, the desired info must be seperated from those signals and the remaining ignored in the same manner as signals received by spoke terminals.

Question 8

Hybrid Mesh SATCOM

Answer 8

At times, terminals serving as a hub may need to communicate with both other hubs and spokes simultaneously
This combination combines the PTP and mesh connectivity