Microwave Frequency Analysis
Microwave Pro uses the
FCC's ULS database to identify usable BAS and Part 101 (950 MHz, 2 GHz, 6 GHz,
7 GHz, 11 GHz, 13 GHz, 18 GHz and 23 GHz) microwave frequencies in the
U.S.A. and to examine
paths over terrain elevation plots while acknowledging interference to and
from other microwave links. The program uses
terrain based analysis in conjunction with methodology found in TIA-EIA
Telecommunications System BulletinTSB10-F. When supplied with the parameters for a proposed path,
Microwave Pro can quickly load all stations that have a potential interference
relationship and calculate Carrier to Interference (C/I) ratios. A
mergeable list of contact
information for paths within the "keyhole" radius from the proposed
path can be generated to be used in the prior notification process.
screen below shows the study of a single link on 943.5 MHz. The C/I In
and C/I out columns show the carrier to interference ratio in dB for
"outgoing" and "incoming" signal relationships, while
the margin columns show the difference between the desired C/I ratio and the
available C/I ratio.
paths below show the spatial relationships between the new
path, D to E, and the existing path from A to B (Both shown in green).
Possible interfering paths are shown in red between A to E and D to B. The
arrows indicate the transmission directions.
profile shown below graphs the actual path over terrain. The terrain
elevation is graphed in red, while the path is plotted in green and the
fresnel zone in orange. The A to E interfering path is shown below.
The user can select the profile of either the proposed path or the
interfering paths simply by clicking one of the buttons on the Microwave
Path Information screen.
You can select a microwave antenna pattern from the
many built in patterns available to the user:
In the screen below you can see that we selected the Scala PR-950 for
the transmit antenna of our reference transmitter.
Reference receive patterns can be selected in the
The receive and transmit patterns of STL
transmission systems in the ULS database are automatically applied according
to the registration in the FCC's ULS database.
If the user clicks the "Contact Info" tab
the contact information is displayed as is shown below:
Microwave-Pro also has a built in link budget system
analysis tool that can be used to generate complete link budget report. The 'wizard'
based interface allows the user to enter path information, transmitter power,
antenna gains, and other system gains and losses. The program will calculate
the EIRP, path loss, fade margin, and provide a minimum recommended fade margin.
A sample link budget report may be downloaded here
(PDF format). Pictures of the Link Budget Wizard may be seen below:
|Key Features of Microwave-Pro include:
|Calculates C/I ratios that consider terrain obstruction.|
|Plots terrain profiles of all protected and interfering paths.|
|Includes a large pattern library for specifying many common antenna patterns.|
|Gives a graphical representation of both protected and interfering path geometry.|
|Can search both license and application microwave databases.|
|Performs frequency searches for the radio, TV BAS and Part 101 bands to determine available
|Generate mergeable address information needed for PCN coordination letters.|
|For more information on Microwave- Pro call us at 1-800-743-3684
or email firstname.lastname@example.org.|