Sea Tel 9711-92, Installation And Operation Manual

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9711-92 Ku-Band TXRX Stowing the Antenna
19-1
19. Stowing the Antenna
This antenna must be properly stowed if the ship will be underway while AC power to the Above Decks Equipment (ADE) is de-
energized. Failure to do so may void your warranty.
CAUTION:
There are three stow restraints that
MUST
be installed on this
antenna pedestal
if the ship will be underway while the Above Decks
Equipment is de-energized
.
It is strongly recommended that AC Power to the ADE and BDE be supplied from an adequately rated Un-interruptible Power
Supply (UPS) to protect the antenna against short power outages while underway.
19.1. Installing the Stow Restraints
WARNING: Antenna Pedestal must be properly restrained (stowed) to
prevent damage to wire rope isolators, isolator springs and/or antenna pedestal
mechanism during underway conditions
when power is removed from the
antenna assembly.
The normal operating condition for the Sea Tel Antenna system is to remain powered up at all times. This ensures that
the antenna remains actively stabilized to prevent physical damage to the antenna pedestal and reduce condensation
and moisture in the radome to prevent corrosion. If, for some reason, the antenna must be powered down during
underway transits, it should be secured with nylon straps regardless of sea conditions to prevent damage to the
antenna system. Refer to the procedure below to secure the antenna pedestal.
Equipment & Hardware needed:
•
Two (2) ½-13 x 2-inch Stainless Steel bolts.
•
Two (2) Nylon straps with ratchet mechanism. Nylon straps must be rated to 300 lbs. Working load
capacity and 900 lbs. Max rated capacity.
Stowing procedure:
1. Point the antenna to Zenith, (90 degree elevation angle),
straight up.
2.
Install one (1) ½-13 x 2-inch bolt into the inside of each
elevation beam as shown in Figure 1.