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Pathloss 4 Overview

Pathloss 4 Overview

The Pathloss system is a complete route layout resource for radio one-way links working in the frequency variety from 30 MHz to 100 GHz. The system is created by Agreement Telecommunication Engineering at Canada and mostly employed by telecom operator and vendor as a transmission organizing instruments.

Presently there are a number of variations of Pathloss 4.:

• PL4B: simple style program for microwave transmission.
• PL4C: essential structure software package for microwave transmission and coverage calculation.
• PL4I: simple design computer software for microwave transmission + interference analysis.
• PL4CI: basic design and style application for microwave transmission + protection calculation + interference investigation.

Pathloss application uses the Borland databases motor (BDE Edition 3.) for interference calculations and the internet site databases. Compatible with just about all home windows functioning technique besides for Windows 3.51.Require disk room for at least 25 mb and minimum amount of 64 mb RAM on home windows 98/2000 and 128 mb RAM for windows NT/XP/Vista

This application is structured into eight route drawing modules, an place sign coverage module and a network module which integrates the radio paths and location protection assessment. Switching between modules is attained by choosing the module from the menu bar. Transmission arranging module contained in Pathloss are explained down below.


A. offers a central spot for the entry of route data parameters. Route calculations are carried out down to the get sign stage. The Worksheet module completes the propagation reliability evaluation. Some goods these as the web page names and contact indications can only be entered in this module. Other entries, this sort of as antenna heights, can be modified in any style and design module in the method.

B. presents the interface to the Pathloss internet site databases for information entry and interference analysis.

C. sets the software form as both microwave (point to point or place to multipoint) or VHF-UHF.

Terrain Details Module

The structure has been optimized for handbook data entry and modifying. One buildings (trees, buildings or drinking water towers) or ranges of structures can be additional to the profile. This consists of a desk of distance and elevations in between the two internet sites. Terrain profiles are produced in this module making use of any of the following strategies:

a) manual entry of distances and elevations from topographic maps

b) direct entry of length – elevation information from topographic maps applying a digitizing pill

c) conversion of distance – elevation data in textual content data files from other resources

d) distance-elevation info is examine from a terrain database

Distinctive features of this modules are grid coordinate devices, transformation concerning datums, terrain profile modifications and survey angles.

Antenna Heights

This module determines the antenna heights which fulfill a clearance criteria specified as an earth radius element (K), a proportion of the initial Fresnel zone radius and an optional set peak. Two independent clearance requirements can be specified for equally most important and variety antennas.


Show a entire transmission evaluation which include rain attenuation, variety improvement calculations and propagation reliability.

Terrain Databases

A terrain databases is expected for spot coverage evaluation, OHLOSS calculations in interference examination and the terrain view characteristic. Single route profiles can also be created from a terrain info base

Internet site Database

All options of the method incorporate an interface in the Summary and Community modules to a website databases

Multipath Module

Ray tracing strategies are employed to examine the reflective qualities of a path and to simulate abnormal propagation environment.

Reflections Module

The Reflection module analyzes the deviation in get sign amount on paths whose geometry can guidance a specular reflection

Diffraction Module

Diffraction module consist a diffraction algorithm ( a diffraction reduction calculation ), interactive diffraction reduction calculation, tropospheric scatter reduction blended with diffraction loss, time variability and variable parameters.

Coverage Module

Coverage modules screen examination of location protection and line of sight. It really is call for a terrain facts base.

Antenna & Radio Knowledge Documents

Contain microwave antenna information information, microwave radio info information,threshold-to-interference(T-I) ratio definition and VHF-UHF antenna data documents.

Network Module ( Frequency Setting up )

The Network module offers a geographic interface to the route style and design modules just by clicking on the link involving two internet sites. This function noticeably reduces the layout effort on huge projects. Intra procedure interference calculations are carried out in the Community module.

Intra Procedure Interference

Interference calculations carry the examination down to the mix threshold degradation of the sufferer receivers because of to several interferences.

Terrain Perspective

A 3D terrain check out is readily available in the Terrain Data and Community modules. In the Community module, the user basically defines a rectangular area on the screen to display the terrain. New sites can be extra in the terrain view.

I am going to article it on following chapter about profile terrain databases with Pathloss.You should check out for far more tutorial about telecom and laptop or computer at ngupi.