Technical Specification

• Antenna Type: Daisy loop antenna (Omni-directional)
• Frequency Range:
  • Transmit (TX): 1626.5 MHz to 1646.5 MHz
  • Receive (RX): 1537.0 MHz to 1544.2 MHz
• Channel Interval: 5 kHz
• G/T (Gain-to-noise temperature ratio): Better than -23 dB/K (at elevation angle 5°)
• EIRP (Equivalent Isotropically Radiated Power): 12 to 16 dBW (at elevation angle 5°)
• Modulation: BPSK (Binary Phase Shift Keying)
• Modulation Rate: 600 / 1200 sps (symbols per second)
• Coding: Convolution with coding rate 1/2 and constraint length 7
• Decoding: Viterbi decoder
• Polarization: Right-hand circular polarization
• Axial Ratio: Within 6 dB (from 5° to 90° elevation)
• VSWR (Voltage Standing Wave Ratio): 2.0 or less (50 ohm)
• Receiving Gain: 33 to 40 dB
• Receiving NF (Noise Figure): 1.7 dB or less
• Transmitting Gain: 28.5 to 42.5 dB

Environmental Conditions:

• Operating Temperature: -35°C to +55°C (Antenna unit)
• Storage Temperature: -35°C to +70°C (Antenna unit)
• Relative Humidity: 95% or less at +40°C
• Degree of Protection (IP Rating): IP56 (Antenna unit) – meaning it’s protected against dust ingress and strong jets of water.
• Vibration: Complies with IEC 60945 Ed.4 standards for maritime navigation and radio communication equipment.

Physical Characteristics:

• Dimensions:
  • Diameter: 156 mm (6.14 inches)
  • Height: 258 mm (10.16 inches)
• Weight: 1.4 kg (approximately 3.09 lbs)
• Color: Upper: N9.5 (likely a light grey/white), Lower: 2.5PB3.5/10 (likely a blue-grey)

Power Supply:

• Power is supplied to the IC-118 via the FELCOM 18/19 Terminal Unit (IC-218 or IC-219). It does not have a separate power input.

System Compatibility:

• Designed as an integral part of the Furuno FELCOM 18 and FELCOM 19 Inmarsat-C Mobile Earth Station systems.