Pre-Installation Requirements
Main Power Cabling and UPS Guidelines
OceanTRx
TM
4-500 Installation and Operations Manual
3-11
3.6
Main Power Cabling and UPS Guidelines
3.6.1
Power Requirements
All equipment: Antennas, CCU and DSS are classified and must be installed according
to Over Voltage Category (OVC) II specifications.
All equipment must be connected via single-pole or dual-pole circuit breaker -
depending on the ship's electrical infrastructure.
Power to all equipment must be wired according to the national wiring rules.
All equipment must be connected via UPS (Uninterrupted Power Supply).
Use a 10A main circuit breaker on the ship’s power source, located as close as
possible to the system.
3.6.2
Cabling Guidelines
Observe the following guidelines when connecting the system to the ship’s AC mains
power source:
Use a Single-phase grounded cable that contains 3 cords.
The cable should be rated for at least 10A.
The cable’s cord diameter shall be at least 18 AGW.
Use the shortest possible length of cable permitted by the system’s location.
Equipment grounding:
ADE equipment: at least 16 AWG protective earthing conductor cable should be
connected to the ship's earthing.
BDE equipment: at least 18 AWG protective earthing conductor cable should be
connected to the rack's earthing.
3.7
Verify Tx/Rx Path Gain Budgets
The modem verifies the Rx signal level and Carrier-to-Noise CoN (signal quality).
NOTE:
It is not necessary to modify any of the parameters
– unless the signal exceeds the dynamic
range allowed for the specific modem or if the LMR cable is less than 2 or 3 meters.
When the modem is installed, verify the following:
The Tx signal (from the modem) is set so that the BUC is not saturated, yet strong
enough for quality transmission (1dB compression point).
The Rx signal (into the modem) is within the modem’s dynamic range.
