4A

Question 1

The ___ contained within electronic case B/E is responsible for providing stable timing throughout multiple systems that allow the GMT to communicate.

Answer 1

timing Line Replaceable Unit (TRAK 9000)

Question 2

Each hub in the GMT has a dedicated timing unit allowing both hubs to operate ___.

Answer 2

independently

Question 3

The GMT is supplied with a GPS Stratum-1 timing source using a highly stable ___.

Answer 3

rubidium oscillator

Question 4

The rubidium oscillator provides a reference output of ___ MHz that is distributed through ___ output ports located on the rear of the
unit.

Answer 4

5 MHz
four

Question 5

The ETSSP (), data modems (), Replacement Frequency Modulated Order Wire (RFMOW) modem (), the block up/down converters () and the KA-Band controller (_) all receive timing from the Stratum-1 timing source via the four (4) 5 MHz outputs.

Answer 5

A
B
B
C
D

Question 6

The TRAK 9000 timing unit also houses an expansion card accessible through the rear panel of the system. This card houses an internal ___ that helps store GPS Almanac data used for quick satellite detection and communication.

Answer 6

battery

Question 7

The TRAK 9000 timing unit connects to an external GPS antenna that is deployed outside upon initial setup of the GMT antenna. The external GPS antenna is used to…?

Answer 7

pull timing information from GPS satellites.

Question 8

If the internal battery inside of the TRAK 9000 timing module fails, it will…?

Answer 8

lose all GPS almanac data