Pathloss 4.0

How To Operate PathlossPATHLOSS program is full Microwave Network design software.For our work we shall use PATHLOSS for the following:a) Make Path Profile to find antenna height in each stationb) Make Network Configurationc) Calculate Link Budget to find Antenna diameters , RX level & Link AvailabilityNecessary Data for Microwave Network Design & how to place it in your PATHLOSS

Program1. RAIN file

This folder contents Rain data for each area of the world according to 4 standards (Canada, Crane, Crane_96 & ITU). Usually we work according to ITU standard (ITU-R-P.530-7/8)

THIS DATA WILL AUTOMATICALLY PLACED IN PATHLOSS FOLDER AFTER PROGRAM SET UP

2. Equipment FileThis folder contents 4 folders but for our Microwave design we just use 2 folders as the followings:

a. MAS which contents Microwave Antenna Data for different AntennaManufacturer (Andrew , RFS , ERICSSON , …………..)

b. MRS which contents Microwave Radio Data for different Manufacturers.3. Contour map database

How To Set Contour Map Database

In Pathloss, we can use some contour map database to generate pathProfile. Please note, this contour map database just only for reference, we have to verification the actual condition by doing path survey.

The common contour map database are SRTM (Shuttle Radar Topography Mission) and GTopo30, but in this case we will use SRTM Database due to it has high accuracy than GTopo30.

The contour map database SRTM is free and could be download from :ftp://e0srp01u.ecs.nasa.gov/srtm

To set the contour map database, please follow the following steps :

1. Create a folder in your hard drive, name it with SRTM or another name.

2. Copy the SRTM file (file name.hgt)3. Run Pathloss, click “Configure” and the select “Terrain Database”

Fig. 1

4. On Configure Terrain Database window, choose Primary menu and select SRTM.

Fig. 2

5. Select “Setup Primary”, then select “File” -> “BIL-HDR-BLW”6. Choose the folder of SRTM data, select the SRTM data and then

click “Open”.7. The contour map database already set to your Pathloss

Fig. 3

Make Path ProfileTo make Path Profile for one hop, please follow the following steps :1. Run Pathloss2. Enter site name and site coordinate on each column

Fig. 4

3. Click “Module” and then select “Terrain Data”4. Then, click “Operations” and select “Generate Profile”

(note: we have to set up the contour database before do this step)

5. The result will shown as figure below

Fig 5

6. To set obstacle (building or tree), click on structure column, and choose the menu “Single Structure” or “Range of Structures”

5. Choose the type of obstacle (building or tree) and set the height of obstacle (in meter). It shown below.

Fig 6

Set Antenna HeightAfter we make the path profile, the next step we have to set the antenna height to check the LOS condition.1. Click on Module menu and choose Antenna Heights.2. We can set the antenna height manually or optimize it automatically.3. If we set the heights manually, we have to click the antenna

heights menu on the left/right top side and input the parameter.4. To optimize the antenna heights automatically, just click the Optimize

icon on the top side. See Fig. 75. Click on “Module” and select “Print Profile” to see the result.

We can see the antenna heights are LOS or not. See Fig. 8

Fig 7

To set Antenna Height

To optimize Antenna Height

Fig. 8