Sea Tel ST88-21 C/Ku-Band TVRO, Installation And Operation Manual

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ST88-21 C/Ku-Band TVRO ST88-21 Technical Specifications
14-5
14.8. Environmental Conditions (ADE)
Temperature: -20 degrees C to 55 degrees C.
Humidity: Up to l00% @ 40 degrees C, Non-condensing.
Spray: Resistant to water penetration sprayed from any direction.
Icing: Survive ice loads of 4.5 pounds per square foot. Degraded RF
performance will occur under icing conditions.
Rain: Up to 4 inches per hour. Degraded RF performance may occur
when the radome surface is wet.
Wind: Withstand relative average winds up to 100 MPH from any
direction.
Vibration: Withstand externally imposed vibrations in all 3 axes, having
displacement amplitudes as follows:
Frequency Range, Hz Peak Single Amplitude
4 - 10 0.100 inches (0.1G to 1.0G)
10 - 15 0.030 inches (0.3G to 0.7G)
15 - 25 0.016 inches (0.4G to 1.0G)
25 - 33 0.009 inches (0.6G to 1.0G)
Corrosion Parts are corrosion resistant or are treated to endure effects of salt
air and salt spray. The equipment is specifically designed and
manufactured for marine use.
14.9. Cables
14.9.1. Antenna Control Cable (Provided from ACU-MUX)
RS-422 Pedestal Interface
Type Shielded Twisted Pairs
Number of wires
Wire Gauge 24 AWG or larger
Communications Parameters: 9600 Baud, 8 bits, No parity
Interface Protocol: RS-422
Interface Connector: DE-9P
14.9.2. Antenna L-Band TVRO IF Coax Cables (Customer Furnished)
2, 4 or 6 cables are required dependent upon which feed/LNB configuration your antenna is fitted with.
Type F male connectors installed on the cables MUST be the correct type so that they mate properly with the
cable you are using.
Due to the dB losses across the length of the RF coaxes at L-Band, Sea Tel recommends the following 75
ohm coax, or Heliax, cable types (and their equivalent conductor size) for our standard pedestal installations:
Run Length Coax Type Conductor Size
up to 75 ft LMR-300-75 18 AWG
up to 150 ft RG-11 or LMR-400-75 14 AWG
up to 200 ft LDF4-75 Heliax 10 AWG
Up to 300 ft LMR-600-75 6 AWG
For runs longer that 300 feet, Sea Tel recommends Single-mode Fiber Optic Cables with Fiber Optic
converters.
14.9.3. AC Power Cable (Pedestal & Rf Equipment)
Voltage: 110 or 220 volts AC (220 VAC Recommended)
Pedestal Power: 100 VA MAX
RF Equipment Power: 1500 VA
MAX