Furuno Felcom 82, Operator'S Manual

Page: 224 / 230

SP - 1
E5624S01C
SPECIFICATIONS OF THE INMARSAT -B SHIP EARTH STATION
FELCOM 82 A/B (A: Class 1, B: Class 2)
1. ANTENNA UNIT
Antenna Type 0.9 m diameter parabola
Gain Greater than 21.0dB
Axial Ratio Less than 2dB
Antenna Beamwidth 15 deg. approx. (at -3dB)
Stabilization Triple-axis active control type
Positioning AZ: 360°, no-rewind
EL: 5° to 90° (-27.5° to 122.5°)
Positioning Accuracy AZ: Better than ±3 deg.
EL: Better than ±3 deg.
Tracking Step-tracking system
2. COMMUNICATION UNIT
Transmit Frequency 1626.5MHz to 1646.5MHz
Receiver Frequency 1525.0MHz to 1545.0MHz
Tuning Steps 10kHz (telex receiving), 20k (telex transmission, voice, 9.6 kbps
data), 100 kHz (HSD)
G/T Better than
‐
4dB/K
EIRP 33/29/25 dBW
Modulation
-Voice 24 kbps filtered O-QPSK
-9.6 kbps Data 24 kbps filtered O-QPSK
-HSD 132 kbps filtered O-QPSK
-Telex TX (Class 1) 24 kbps filtered O-QPSK
-Telex RX (Class 1) 6 kbps filtered BPSK
-TDM 6 kbps filtered BPSK
Coding
-Voice Convolution; Rate 3/4, K=7 (punctured)
-9.6 kbps Data Convolution; Rate 1/2, K=7
-Telex Convolution; Rate 1/2, K=7
Decoding 8-level soft - decision Viterbi
Voice Coding Method 16 kbps APC-MLQ
Interface IEC61162-1 Ed.2 (NMEA3.0)
Input: GGA, GLL, RMA, RMC, ZDA, VTG, RMB, WPL, MTW, DBT,
VDR, BWC, BWR
Output: GGA, ZDA, GLL, VTG, RMC, GSV