Nera Inmarsat-c, Руководство по обслуживанию

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Appendix 5) Specifications
AP5-1
1. GENERAL
1.1 Transmitting Frequency 1626.5 to 1646.5 MHz
1.2 Receiving Frequency
1530.0 to 1545.0 MHz
1.3 Channel Interval 5 kHz
1.4 G/T Better than -23 dB/K (elevation angle 5°)
1.5 EIRP 12 to 16 dBW (elevation angle 5°)
1.6 Modulation BPSK
1.7 Modulation Rate 1200 sps
1.8 Coding Convolution with coding rate 1/2 and constraint length 7
1.9 Decoding Viterbi decoder
1.10 Navigation Data Interface IEC61162-1, Internal GPS Board (option)
INPUT DATA SENTENCES BWC, BWR, GGA, GLL, VTG, WPL, RMA, RMB,
RMC, MTW,DBT, VDR, ZDA
OUTPUT DATA SENTENCES GGA, ZDA, GLL, VTG, RMC, GSV
2. ANTENNA UNIT
2.1 Antenna Type Daisy Loop Antenna
2.2 Gain
Horizontal : Omnidirectional
Vertical : Angle of elevation: 90° at 0 dBi or more
Angle of elevation : 5° at +1.3 dBi or more
2.3 Declination Clockwise circular
2.4 Axial Ratio Within 6 dB (5° to 90°)
2.5 VSWR 1.5 or less/ 50 ohm
3. POWER SOURCE
3.1 Terminal Unit 12-24 VDC: 13.0-5.0 A (Transmit), 1.7-0.9 A (Receive)
4. ENVIRONMENTAL CONDITION
4.1 Ambient Temperature
Above deck equipment: -35°C to +55°C
Below deck equipment: -15°C to +55°C
Appendix 5) Specifications