Netcontrol’s radio network tools are a set of calculators designed to help with the planning of your data radio network.

Please note that the calculations are based on certain assumptions and should only be used as a guideline for radio network design.

Many factors can have an impact on the radio link. Planning a radio network is usually done by first simulating the network in a desktop propagation study using a professional software package. The results are then verified by performing a field survey. Netcontrol offers a planning service to its radio customers.

However, you can use the formulas below to calculate, roughly, whether the radio link has an acceptable fade margin or, if not, how much antenna gain needs to be added or whether repeaters must be used.

Egli Calculator

Used for propagation loss. This value indicates how much the signal weakens because of the distance between the transmitter and the receiver.

Free Space Calculator

Shows the theoretical attenuation, with no terrain considerations. You can enter a value for distance and see the attenuation, or vice versa.

Watts to dBM Conversion

This page converts between two common units for radio power, Watts (W) and “decibel relative to one milliwatt” (dBm), which is a logarithmic unit of power.

Radio Link Calculation

A calculation for those who are unable to view the Egli and Free Space Calculations or would prefer to see an example of the formula used in working practice.

Radio Link Budget

A calculation where all the possible losses in the system are subtracted from the line-of-sight result to give an estimated value of your likely link performance.

Line of Sight Calculation

A calculation which gives the likely link performance in a situation with no interference a clear line of sight transmission.

Radio Fade Margin

An expression for how much margin, measured in dB, there is between the received signal strength level and the receiver sensitivity of the data radio.