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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

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
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)

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down link rawang 11 m
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)

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rain model itu p zone
Rain Model – ITU P-zone

ITU-R Recommendation PN.837[5]

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measat 2 parameters
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]

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carriers modulation
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

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