Appendix 3. Specifications
AP3-3
AP3.2 FELCOM-250
1. GENERAL
1.1 Transmit frequency 1626.5 MHz to 1660.5 MHz
1.2 Receiving frequency 1525.0 MHz to 1559.0 MHz
1.3 Channel interval 1.25 kHz
1.4 G/T Better than -15.5dB/K
1.5 EIRP 15.1 dBW
2. ANTENNA UNIT
2.1 Antenna type Patch array antenna
2.2 Gain Greater than 11.0dBi
2.3 Axial ratio Less than 4.0dB
2.4 Antenna beam width 50° approx. (at -3 dB)
2.5 Stabilization Three-axis control
2.6 Positioning Az: 0° to 360°, El: 5° to 90°
2.7 Position accuracy Within 0.6dB (95% time)
2.8 Tracking Electrical beam tracking system
3. COMMUNICATION UNIT
3.1 Communication services
Voice 4 kbps AMBE+2 or ISDN3.1 kHz audio*
Data Standard IP 284 kbps (Best effort)
Standard IP Data Up link: 239 kbps,
Down link: 284 kbps (Best effort)
Streaming IP Data 8, 16, 32, 64, 128 kbps (QoS)
Short message service Up to 160 characters
Facsimile Group 3 facsimile via 3.1 kHz audio*
3.2 Modulation QPSK, 16QAM
*: Voice and facsimile communications are available at satellite elevation
20° or more
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