Sea Tel 9797B-70 C-Band TX/RX, Installation And Operation Manual

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9797B-70 Technical Specifications 9797B-70 C-Band TXRX
8-4
8.9. 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.
8.10. Cables
8.10.1. 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
8.10.2. Antenna Transmit & Receive IF Coax Cables (Customer Furnished)
Due to the dB losses across the length of the RF coaxes at L-Band, Sea Tel recommends the following 50
ohm coax cable types (and their equivalent conductor size) for our standard pedestal installations:
Run Length Coax Type Conductor Size
up to 35 ft RG-58 20 AWG
up to 75 ft RG-8 or LMR-300 18 AWG
up to 150 ft RG-213, RG214 or LMR-400 14 AWG
up to 200 ft LDF4-50 Heliax or LMR-500 10 AWG
Up to 300 ft LMR-600 6 AWG
For runs longer that 300 feet, Sea Tel recommends Single-mode Fiber Optic Cables with Fiber Optic
converters.