Pathloss 4 Overview

The Pathloss program is an entire trail design instrument for radio hyperlinks running within the frequency vary from 30 MHz to 100 GHz. The program is created by way of Contract Telecommunication Engineering at Canada and most commonly utilized by telecom operator and dealer as a transmission making plans gear.

Currently there are a number of variations of Pathloss 4.0:

• PL4B: elementary design instrument for microwave transmission.

• PL4C: elementary design instrument for microwave transmission and protection calculation.

• PL4I: elementary design instrument for microwave transmission + interference research.

• PL4CI: elementary design instrument for microwave transmission + protection calculation + interference research.

Pathloss program makes use of the Borland database engine (BDE Version 3.0) for interference calculations and the website online database. Compatible with nearly all home windows running device with the exception of for Windows 3.51.Need disk area for no less than 25 mb and minimal of 64 mb RAM on home windows 98/2000 and 128 mb RAM for home windows NT/XP/Vista

This program is structured into 8 trail drawing modules, a space sign protection module and a community module which integrates the radio paths and house protection research. Switching between modules is completed by way of settling on the module from the menu bar. Transmission making plans module contained in Pathloss are described under.


A. supplies a central location for the access of trail knowledge parameters. Path calculations are performed right down to the obtain sign degree. The Worksheet module completes the propagation reliability research. Some pieces such because the website online names and phone indicators can most effective be entered on this module. Other entries, reminiscent of antenna heights, can also be modified in any design module in this system.

B. supplies the interface to the Pathloss website online database for knowledge access and interference research.

C. units the applying sort as both microwave (level to indicate or level to multipoint) or VHF-UHF.

Terrain Data Module

The design has been optimized for guide knowledge access and enhancing. Single buildings (bushes, constructions or water towers) or levels of buildings can also be added to the profile. This is composed of a desk of distance and elevations between the 2 websites. Terrain profiles are created on this module the use of any of the next strategies:

a) guide access of distances and elevations from topographic maps

b) direct access of distance – elevation knowledge from topographic maps the use of a digitizing pill

c) conversion of distance – elevation knowledge in textual content information from different resources

d) distance-elevation knowledge is learn from a terrain database

Special options of this modules are grid coordinate techniques, transformation between datums, terrain profile adjustments and survey angles.

Antenna Heights

This module determines the antenna heights which fulfill a clearance standards specified as an earth radius issue (Okay), a proportion of the primary Fresnel zone radius and an not obligatory mounted top. Two separate clearance standards can also be specified for each primary and variety antennas.


Display an entire transmission research together with rain attenuation, range growth calculations and propagation reliability.

Terrain Databases

A terrain database is needed for house protection research, OHLOSS calculations in interference research and the terrain view characteristic. Single trail profiles can be generated from a terrain knowledge base

Site Database

All choices of this system come with an interface within the Summary and Network modules to a website online database

Multipath Module

Ray tracing tactics are hired to investigate the reflective traits of a trail and to simulate ordinary propagation surroundings.

Reflections Module

The Reflection module analyzes the deviation in obtain sign degree on paths whose geometry can make stronger a specular mirrored image

Diffraction Module

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

Coverage Module

Coverage modules show research of house protection and line of sight. It’s require a terrain knowledge base.

Antenna & Radio Data Files

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

Network Module ( Frequency Planning )

The Network module supplies a geographic interface to the trail design modules just by clicking at the hyperlink between two websites. This characteristic considerably reduces the design effort on huge initiatives. Intra device interference calculations are performed within the Network module.

Intra System Interference

Interference calculations lift the research right down to the mix threshold degradation of the sufferer receivers because of more than one interferences.

Terrain View

A 3-d terrain view is to be had within the Terrain Data and Network modules. In the Network module, the person merely defines an oblong house at the display to show the terrain. New websites can also be added within the terrain view.

I’ll put up it on subsequent bankruptcy about profile terrain database with Pathloss.Please talk over with for extra instructional about telecom and laptop at ngupi.