Link budget model
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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

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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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