Cobra GPS 500 Guía de usuario descargar pdf (Pagina 9)

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The WarFighter Source for GPS Retransmission Systems Page 9 of 102

Document Class/Number:

DOC-UMN-AAA-AD

GLI-COBRA USERS MANUAL Revision: 001F

The GPS RS SC performs the following basic functions:

Amplifies the signals: The SC amplifies the GPS signals to a level for retransmission from the RS antennas

that are sufficient for complete signal coverage throughout the cargo compartment.

Employs Power Control: The SC employs a power control function which measures the output power of the

GPS signals, from the SC, and controls the gain to ensure the necessary radiated power level is achieved

within the aircraft cargo compartment.

Distributes signals: The SC divides the GPS L1 and L2 signals evenly over the four outputs for distribution to

the retransmission antennas located in the cargo compartment. The number of retransmission antennas

required for complete signal coverage in the cargo compartment depends on the size of the aircraft.

Performs Built In Test (BIT): The SC performs a continuous built in test function, monitoring the status of

coaxial cables to and from the SC, as well as the GPS signal levels and signal quality within the SC itself.

Provides diagnostic port: The SC has a diagnostic port that can be monitored by way of a laptop computer

RS232 port in order to test and determine the status of the system.

Provides real-time status signal: The SC provides a status signal (XMIT or FAULT) to the Enunciator LEDs on

the SC LRU faceplate.

Receives power: The SC receives 28VDC from a standard military BA5590 battery, or the system may be

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Cobra GPS 500 Guía de usuario Pagina 9