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Link Budget Model

Link Budget Model. Satellite: Measat-2 Tx: Kuching 2.4-meter Rx: Rawang 11-meter Data Rate: 512 Kbps Carrier: SCPC, QPSK, FEC ½, RS Modem: RC/DMD-2401. Up Link – Kuching 2.4-m. Vapour density: 15 Surface temp: 32 Ant eff, gain: +42, 65% (Prodelin) Prodelin 2.4: +42 (65%)

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Link Budget Model

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  1. Link Budget Model Satellite: Measat-2 Tx: Kuching 2.4-meter Rx: Rawang 11-meter Data Rate: 512 Kbps Carrier: SCPC, QPSK, FEC ½, RS Modem: RC/DMD-2401

  2. Up Link – Kuching 2.4-m • Vapour density: 15 • Surface temp: 32 • Ant eff, gain: +42, 65% (Prodelin) • Prodelin 2.4: +42 (65%) • Prodelin 1.8: +39.5 (65%) • NEC 11: +54.8 • NEC 7.6: +51.7 • Coupling loss: 0.5 • (E/S: 1; VSAT: 0.5) • Antenna mispointing: 0.5 • (E/S:0.1 - 0.3; VSAT: 0.5 - 1.0) • C/ACI: 20 (typical) • C/ASI: 18 (typical) • C/XPI: 30 (typical) • HPA C/IM: 30 (typical) Maxis East Malaysia Interoffice LinkMaxis Confidential Restricted

  3. Down Link – Rawang 11-m • Vapour density: 15 • Surface Temp: 32 • Ant eff, gain: +51.7 • Prodelin 2.4: +38 (65%) • Prodelin 1.8: +35.5 (65%) • NEC 11: +51.7 • NEC 7.6: +48.5 • Coupling loss: 0.5 • (E/S: 1; VSAT: 0.5) • Antenna mispointing: 0.1 • (E/S:0.1 -0.3; VSAT: 0.5 - 1.0) • LNB noise fig: +42 (NEC) • Others: +39 - +50 • Antenna noise temp: 27 • NEC: 27; Prodelin: 45 • C/ASI: 18 (typical) • C/ACI: 20 (typical) • C/XPI: 30 (typical) Maxis East Malaysia Interoffice LinkMaxis Confidential Restricted

  4. Rain Model – ITU P-zone ITU-R Recommendation PN.837[5] Maxis East Malaysia Interoffice LinkMaxis Confidential Restricted

  5. Measat-2 Parameters • G/T receive dB/K: 0.10 [Kuching](NEC) • SFD dBW/m2: -88.7 [Kuching] • Attenuator setting: 6 • (M2-2C: 6; M2-3: 4) • EIRP (saturation): 38.5 [Rawang] • Transponder Bandwidth: 72 [Measat-2] • Transponder IBO: 6 [Measat-2] • Transponder OBO: 4 [Measat-2] • C/IM: 18.4 [Measat-2] Maxis East Malaysia Interoffice LinkMaxis Confidential Restricted

  6. Carriers & Modulation • Required Eb/No: 6.5[Reed Solomon] • Overhead: 1% - 5% • Radyne=1/15 (Asyn) • 1+Roll off factor: 1.2 • Carrier spacing factor: 1.2 • BW allocation step: 0.001 • System margin: 1 • Operator Parameter: • RS code: 126/112 • Modulation: QPSK • FEC: 1/2 • Transponder Power Usage: Under use is checked when the ODU has limited power (5W) • Eb/No: 6.5 + 1 = 7.5 dB Maxis East Malaysia Interoffice LinkMaxis Confidential Restricted

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