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
f.massa@elenos.com

• 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

• 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
Set
TX
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 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)

• 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)
number (use default 60 to 75)
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 Sales
Elenos / 305 Broadcast
M: +66 83 618-9333
T: +1 831 264-4159
f.massa@elenos.com
Skype: fstarport
Twitter: @fstarport

Guide for Preparing FM Radio Transmitter Coverage Maps

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Guide for Preparing FM Radio Transmitter Coverage Maps