Pathloss 4 Overview
Pathloss 4 Overview

The Pathloss program is a complete route style and design resource for radio inbound links functioning in the frequency assortment from 30 MHz to 100 GHz. The program is established by Agreement Telecommunication Engineering at Canada and mostly utilized by telecom operator and seller as a transmission planning tools.

Presently there are many variations of Pathloss 4.:

• PL4B: fundamental design software for microwave transmission.
• PL4C: fundamental style software for microwave transmission and coverage calculation.
• PL4I: simple layout software package for microwave transmission + interference examination.
• PL4CI: basic layout software program for microwave transmission + protection calculation + interference investigation.

Pathloss system takes advantage of the Borland databases motor (BDE Variation 3.) for interference calculations and the site databases. Appropriate with practically all home windows operating program other than for Windows 3.51.Need disk house for at minimum 25 mb and minimum amount of 64 mb RAM on home windows 98/2000 and 128 mb RAM for home windows NT/XP/Vista

This software is structured into eight route drawing modules, an region signal coverage module and a community module which integrates the radio paths and area coverage analysis. Switching among modules is accomplished by picking out the module from the menu bar. Transmission planning module contained in Pathloss are described down below.


A. supplies a central area for the entry of route info parameters. Route calculations are carried out down to the acquire sign level. The Worksheet module completes the propagation dependability examination. Some items this sort of as the internet site names and contact signs can only be entered in this module. Other entries, this kind of as antenna heights, can be adjusted in any design and style module in the system.

B. presents the interface to the Pathloss web-site databases for knowledge entry and interference examination.

C. sets the application style as both microwave (issue to position or position to multipoint) or VHF-UHF.

Terrain Data Module

The design has been optimized for handbook details entry and modifying. One buildings (trees, structures or h2o towers) or ranges of constructions can be extra to the profile. This consists of a table of length and elevations concerning the two web pages. Terrain profiles are established in this module making use of any of the pursuing solutions:

a) handbook entry of distances and elevations from topographic maps

b) immediate entry of distance – elevation knowledge from topographic maps employing a digitizing tablet

c) conversion of length – elevation facts in textual content files from other resources

d) length-elevation facts is study from a terrain database

Unique attributes of this modules are grid coordinate units, transformation between datums, terrain profile modifications and survey angles.

Antenna Heights

This module decides the antenna heights which fulfill a clearance standards specified as an earth radius variable (K), a proportion of the initially Fresnel zone radius and an optional mounted peak. Two independent clearance criteria can be specified for each main and variety antennas.


Display a entire transmission investigation together with rain attenuation, variety enhancement calculations and propagation dependability.

Terrain Databases

A terrain databases is required for spot coverage analysis, OHLOSS calculations in interference evaluation and the terrain view characteristic. Single route profiles can also be produced from a terrain information base

Website Databases

All alternatives of the program consist of an interface in the Summary and Network modules to a internet site database

Multipath Module

Ray tracing procedures are employed to analyze the reflective features of a route and to simulate abnormal propagation atmosphere.

Reflections Module

The Reflection module analyzes the deviation in obtain sign degree on paths whose geometry can assistance a specular reflection

Diffraction Module

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

Coverage Module

Protection modules screen analysis of place protection and line of sight. It can be require a terrain facts base.

Antenna & Radio Facts Data files

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

Network Module ( Frequency Scheduling )

The Network module gives a geographic interface to the path design and style modules just by clicking on the backlink amongst two internet sites. This feature substantially decreases the style hard work on huge jobs. Intra system interference calculations are carried out in the Network module.

Intra Program Interference

Interference calculations carry the assessment down to the mixture threshold degradation of the sufferer receivers because of to a number of interferences.

Terrain Look at

A 3D terrain see is available in the Terrain Data and Network modules. In the Community module, the user only defines a rectangular location on the display to display screen the terrain. New web pages can be added in the terrain look at.

I will put up it on future chapter about profile terrain databases with Pathloss.Remember to stop by for far more tutorial about telecom and computer at ngupi.

Supply by Koe Rendra


Please enter your comment!
Please enter your name here