Homepage

|| HOME || NEWS || ARTICOLI|| LIBRI || DOWNLOAD || LINK || FORUM ||

Wi4net

Menu principale

Partner

Microsoft Office 2007 enterprise download Windows 7 Ultimate is the most versatile and powerful edition of Windows 7 buy Adobe Creative Suite 4 OEMIt combines remarkable ease-of-use with the entertainment features of Home Premium and the business capabilities of Professional you can encrypt your data with BitLocker and BitLocker-To-Go. And for extra flexibility, buy Adobe Creative Suite 4 Master Collection oemyou can work in any of 35 languages. Get it all buy Adobe Photoshop CS4 Extended OEMwith Windows 7 Ultimate.

Solidarietà

On-line

Ci sono 25 visitatori e
0 utenti on-line

Sei un utente non registrato. Puoi loggarti qui o registrarti liberamente cliccando qui.

Login

 Nickname

 Password

 Ricordami


Non hai ancora un account?
Registrati subito.
Come
utente registrato potrai
cambiare tema grafico
e utilizzare tutti i servizi offerti.

Wireless Calculators

Calcolatrice Wireless

 

Sistema Wireless

Radio system

  1. Power Budget
  2. Free Space Loss
  3. System Performance
  4. Fresnel Zones
  5. Power Conversion

 

Power Budget

Calculations and equations used.

   
Transmit Power Antenna Gain Power
 mW
OR

 dBm
 dB(i)  dB
   
Cable Properties
(per 100 ft or m)
Cable Length  
 dB (100 ft)
OR
 dB (100 m)
 feet
OR

 meters
 dB
   
Frequency in MHz No. of Connectors  
 MHz.  No.  dB
   
   dB

 

Free Space Loss

Calculations and equations used.

  Result
 MHz  Km
OR
 Miles
 dB

 

Fresnel Zones

Calculations and equations used.

 Km
OR

 Miles
 Km
OR
 Miles
 m
at
 Km
 ft
at
 Miles
 
 MHz    m  ft
 
     m  ft

 

System Performance

Calculations and equations used.

  Result
 MHz  Km
OR  Miles
   dB
 
 dBm
OR
 mW
 dBm  dB  dB
 
 dBm  dB  dB  dB
RX Power SAD Factor Theoretical Margin
 dBm  %  dB

 

milliWatts to dBm (and vice versa)

Calculations and equations used.

  Result
mW  dBm
  Result
 dBm  mW

Power Budget Calculations

  1. mW to dBm = 10Log10(Watts) + 30

  2. feet to meters = .3048

  3. meters to feet = 3.28

  4. Calculator normalises all distances to kilometers and meters

  5. Connectors loss = 0.10 * square root (frequency in GHz)

Free Space Calculations

  1. Free space loss = 36.56 + 20Log10(Frequency) + 20Log10(Distance in miles)

  2. Calculator normalises all distances to miles

  3. Miles to Kilometers = 1.609

  4. Kilometers to miles = 0.621

Fresnel Zone Calculations

  1. Calculator normalises all distances to kilometers and meters

  2. Miles to Kilometers = 1.609

  3. Kilometers to miles = 0.621

  4. feet to meters = .3048

  5. meters to feet = 3.28

  6. 1st Fresnel Zone radius (Km) = 17.3 x Sqr root ((Obstacle Distance x (Total Link - Obstacle Distance)) / (Frequency in GHz x Total Link))

  7. 1st Fresnel Zone radius (miles) = 72.1 x Sqr root ((Obstacle Distance x (Total Link - Obstacle Distance)) / (Frequency in GHz x Total Link))

  8. Obstacle free radius = 0.6 x 1st Fresnel Zone radius

  9. Radius of nth Fresnel zone = sqr root ( (n x wave length x Obstacle distance x (Total Link - Obstacle Distance)) / Total Link )

  10. Earth curvature calculation = Total Link **2 /8 * earth radius

  11. Earth radius = 3963 miles, 6378 Km

System Performance Calculations

  1. Calculator normalises all distances to miles and feet during calculations.

  2. Free space loss = 36.56 + 20Log10(Frequency) + 20Log10(Dist in miles)

  3. mW to dBm = 10Log10(millWatts) + 30

  4. dBm to mW = 10(dBm/10)

  5. RX Power = Margin - RX sensitivity

  6. Theoretical margin = TX power budget + RX power budget - free space loss

  7. SAD factor = Theoretical margin/TX power budget * 100 and shows the percentage of spare power on transmission.

dBm to Watts Calculations

  1. mW to dBm = 10Log10(Watts) + 30

  2. dBm to mW = 10(dBm/10)

 

Designed By CMSarea


Tutti i loghi e marchi in questo sito sono di proprietà dei rispettivi proprietari.
I commenti sono di proprietà dei rispettivi autori, ed il resto © 2003-2005 di mia proprietà
Questo sito è stato creato con MaxDev, un sistema di gestione di portali scritto in PHP. MD-Pro è un software libero rilasciato sotto la licenza GNU/GPL Visualizzate le nostre news usando il file backend.php

Licenza Creative Commons
Questo/a opera è pubblicato sotto una Licenza Creative Commons.

I LOGHI DEL SITO SONO STATI GENTILMENTE CREATI DA MEDIALINKS

Powered by MD-Pro