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The document discusses several formulas for calculating path loss, EIRP, signal levels, data transfer speeds, and conversions between units like Watts, dBm, bytes, and bits. It includes formulas for calculating path loss based on distance and frequency, EIRP which considers transmission power, antenna gain and cable loss, and received signal levels for 2G and 3G that account for EIRP, losses, and fading margin. Conversion calculations show equivalents between bytes, bits, kilobits and kilobytes.

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Akhmad Sayuti
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173 views2 pages

Rumus

The document discusses several formulas for calculating path loss, EIRP, signal levels, data transfer speeds, and conversions between units like Watts, dBm, bytes, and bits. It includes formulas for calculating path loss based on distance and frequency, EIRP which considers transmission power, antenna gain and cable loss, and received signal levels for 2G and 3G that account for EIRP, losses, and fading margin. Conversion calculations show equivalents between bytes, bits, kilobits and kilobytes.

Uploaded by

Akhmad Sayuti
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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9/20/2012

Perhitungan Path Loss


Path Loss [dB] = 32,45 + 20 Log d (Km) + 20 Log f (MHz).................................(3.1) Dimana : L : Path loss (dB) f : Frekuensi (MHz) d : Jarak antara mobile station ke base station (km)

Perhitungan EIRP
EIRP = Tx power (dBm) + Antena Gain (dB) Cable loss (dB) ......................(3.2) Dimana: EIRP : Effective Isotropic Radiated Power (dBm) Tx Power (dBm) : Transmitted Power (dBm) Cable Loss : Nilai Loss pada feeder, jumper dan connector (dB)

Konversi dari Watt ke dBm & dBm ke Watt


P(dBm) =10 x log(1000 x P(W)) P(watt) =10^{(dBm 30)/10)} P(dBm) =10 x log(1000 x 20W) =10^{(43,01 30/10)} =10 x 4,3010 =10^{(13,01/10)} = 43,0103dBm =10^1,301 =19,99Watt P(Miliwatt) =10^(dBm/10) =10^(43,01/10) =10^(4,301) =19998,6MiliWatt

Perhitungan Cable Loss


Cable Loss = {(Loss feeder) x (Panjang Feeder)} + {(Loss Connector dan Jumper) x (Banyak Feeder dan Jumper )}....(3.3)
Nilai Loss untuk Feeder, Jumper dan Connector Sistem 2G 3G Feeder loss Jumper loss 7/8 (dB) 7/8 (dB) 0,06 0,42 0,06 0,42 Connector loss 7/8(dB) 0,42 0,42

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9/20/2012

Received Signal Level Voice 2G


Rx Level (dBm) = EIRP wall loss body loss path loss fading margin.....(3.4) Dimana: Rx Level Sub : Sinyal level voice 2G (dBm) EIRP : Effective Isotropic Radiated Power (dBm) Fading margin : 10 dB

Received Signal Level Voice 3G


RSCP (dBm) = EIRP wall loss body loss path loss fading margin.....(3.4) Dimana: RSCP : Sinyal level voice 3G (dBm) EIRP : Effective Isotropic Radiated Power (dBm) Fading margin : 10 dB

Kecepatan Akses Data 2G dan 3G


Kecepatan Data = Jumlah File Transfer.....(3.6) Waktu Dimana: Jumlah File Transfer : 1 Megabyte 3 Megabyte Waktu : Sekon

Konversi dari Byte ke bit


1 Byte = 1 Byte 1 Byte = 8 Bit 1 Byte = 0.0078125 Kilobit 1 Byte = 0.0009765625Kilobyte 1050856 Byte = 1050856 Byte 1050856 Byte = 8406848 Bit 1050856 Byte = 8209.8125 Kilobit 1050856 Byte = 1026.2265625 Kilobyte 1 Bit = 0.125 Byte 1 Bit = 1 Bit 1 Bit = 0.0009765625 Kilobit 1 Bit = 0.0001220703125 Kilobyte 3251872 Byte = 26014976 Byte 3251872 Byte = 3251872 Bit 3251872 Byte = 25405.25 Kilobit 3251872 Byte = 3175.65625 Kilobyte

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