Guide for Preparing FM Radio Transmitter Coverage Maps

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Guide for Preparing FM Coverage Maps Using the Free Web Based

CRC-COVWEB

Frank W. Massa - Asia Pacific Sales, Elenos Broadcast M: +66 83 618-9333 T: +1 831 264-4159 [email protected]

mailto:[email protected]


• CRC-COVWEB Site (Free Access)– Go to http://lrcov.crc.ca/main/

• Register on the site to use the Tool • FCC Tool for Degrees, Minutes, Seconds and Decimal

Degrees Latitude/Longitude Conversions– Go to

http://transition.fcc.gov/mb/audio/bickel/DDDMMSS-decimal.html/

– Note: You will need Degrees Minutes and Seconds to use the CRC-COVWEB Site

• Longley-Rice Propagation Model – See Reference http://www.v-soft.com/web/Propagation.pdf

• Print Screen Program such as Gadwin or ScreenShotCaptor for capturing the images to gig, jpg or png formats for editing and itegration into other programs

• Don’t forget that you must Resister on the CRC-COVWEB Site

Web Tools for Using This Guide

http://lrcov.crc.ca/main/



http://www.v-soft.com/web/Propagation.pdf


• Site Location Latitude and Longitude– Get the Latitude in Degrees Minutes and Seconds to

use the site• Use the FCC Converter if you have Latitude and Longitude in

Decimal Format

• Get the Antenna Height (In Meters)• Get the FM Radio Frequency to be used• Get the Radio Transmitter Power Information• Get the FM Antenna Information

– For this guide we will use an Omni-Directional Antenna

Getting Information


Getting Information – Using the FCC Converter


• The Map will Start Out in Canada.– Zoom Out (- on the map controls) and Scroll

to the Approximate Transmitter Location using the left, right, up and down arrows

– Zoom In and (+ on the map Controls) in this case the location is approx Saen Suk, Thailand

Step 1 – Set the TX Position on the Map



Google Map Controls

Approx Transmitter Location



Transmitter Location

SetTX

Pos


• Enter In the Following Data:– Latitude (13 16 48.3 North)– Longitude (100 56 32.7 East)– Height (60 Meters)– Frequency (98 MHz)– Power (1000 Watts)– Polarization (Vertical)– Antenna Gain (8 dBi)– Antenna Point (0 deg as we are Omnidirectional)

Step 2 – Fill In the TX Site Data


Step 2 – Fill in the TX Data (Image)


• Enter In the Following Data:• Enter for your site – Click on show list or Pull

Down Tab or enter number– Surface Refractivity (Equatorial - 360)– Dielectric Constant or Ground (Good Ground - 25)– Conductivity of Ground (Good Ground - .02)– Climate Zone (Maritime Tropical)– Confidence Level (Default – 50%)– Time Availability (Default – 50%)– Location Availability (Default – 50%)

Step 3 – Fill In the Propagation Data


Step 3 – Fill in the Propagation Data (Image)


• Enter In the Following Data:• Antenna Height Above Ground – (Use the default of 1.5

Meters)• Reception Area, This will be entered by interacting with

the map after clicking the Set RX Area button.– Lower Left– Upper Right

Note: You will need to adjust this area and the size (using the + or –) or position (using the up/down or left/right arrows) of the map to get the best graphic. You can do this later when you Generate the first map.

Step 4 – Fill In the Receiver Data


Step 4 – Fill in the Receiver Data (Image)

Set Automatically by using the “Set RX Area”

Button on the Map


• Enter up to 2 Ranges of Receiver Sensity to be displayed by colors:

• Set Range 1 in dBµV/m “From and To” by filling in the number from typical 40-100 (use default 45 to 60)

• Set Range 2 in dBµV/m “From and To” by filling in the number (use default 60 to 75)

• Set Range 3 in dBµV/m “From and To” by filling in the number (use default 75 to 100)

• Set the Color to be displayed for Range 1, 2 and 3 using the pull down tab (light red, red and dark red)

Step 5 – Fill In the Coverage Display


Step 5 – Fill in the Coverage Display (Image)


• Hit the “Generate Coverage” Button to Display the coverage for your data using the “Map” view

• Use the “Satellite” Button to Display this View

• Use the “Hybrid” Button to Display this View

• Use the “Terrain” Button to Display this View

Step 6 – Generate the Map


Step 6 – Generate the Map (Map View)


Step 6 – Generate the Map (Satellite View)


Step 6 – Generate the Map (Hybrid View)


Step 6 – Generate the Map (Terrain View)


The “free” online CRC-COVWEB program does not have the facilities to save work in progress or images. You will need to print the display and save the file to add into your favorite photo or editing application.

• Typically save the files as .jpg or .png and then edit in MS PowerPoint and add specific Information and a key

• In MS PowerPoint you can “Select All” and save as a .png file for easy integration into MS Word or as an email attachment

Step 7 – Capturing and Presenting


Step 7 – Typical Completed Image


Stay On Air!Prepared by:Frank W. Massa Asia Pacific SalesElenos / 305 BroadcastM: +66 83 618-9333 T: +1 831 264-4159 [email protected]: fstarportTwitter: @fstarport

Engineering

Guide for Preparing FM Radio Transmitter Coverage Maps