Sea Tel 5012-33, Installation Manual

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5012-33 Installation Manual Series 12 Ku-Band Technical Specifications
12-4
12.7. Stabilized Antenna Pedestal Assembly
Type: Three-axis (Level, Cross Level and Azimuth)
Stabilization: Torque Mode Servo
Stability Accuracy: 0.1° RMS, 0.2° peak in presence of specified ship motions
(see below).
Azimuth Motor: Size 23 Brushless DC Servo, Double Stacked w/ Encoder
Level and Cross Level Motors, Size 23 Brushless DC Servo w/ Brake
Inertial Reference: 3 Solid State Rate Sensors
Gravity Reference: 2 MEMS Tilt Sensors
AZ transducer: 256 line optical encoder / home switch
Pedestal Range of Motion:
Elevation Joint Angle -15° to +115°
Cross Level (Inclined 30
°
)
+/- 35°
Azimuth Unlimited
Elevation Pointing: +5° to +90° at 20 degree roll only
+10
°
to +85
°
at maximum combined roll & pitch
Relative Azimuth Pointing Unlimited
Maximum Ship Motions
Roll: +/-25° at 8-12 sec periods
Pitch: +/-15° at 6-12 sec periods
Yaw: +/-8 degrees at 15-20 sec periods
Turning rate: Up to 12 deg/sec and 15 deg/sec/sec
Headway: Up to 50 knots
Heave 0.5G
Surge 0.2G
Sway 0.2G
Specified Ship Motion (for stability
accuracy tests)
Roll +/- 20° at 8 second period
Pitch
10
°
Fixed
Az Relative
0, 45 and 90
°
with respect to roll input
Mounting Height Sea Tel recommends that you not exceed tangential
accelerations of 0.5G (See below chart)