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.  The FCC's COALS (Cable Operations and Licensing System)  and CARS (Cable television Relay Service) databases are included with Microwave-Pro and are including in our database update service. 

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.

The 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. 

One of the most important new features is the ability to modify the prrogram's propagation model parameters and consider separate short term and longterm fading scenarios. 

The 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.

The 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 same manner.

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:          
bulletCalculates C/I ratios that consider terrain obstruction.
bulletPlots terrain profiles of all protected and interfering paths.
bulletIncludes a large pattern library for specifying many common antenna patterns.
bulletGives a graphical representation of both protected and interfering path geometry.
bulletCan search both license and application microwave databases.
bulletPerforms frequency searches for the radio, TV BAS and Part 101 bands to determine available frequencies.
bulletGenerate mergeable address information needed for PCN coordination letters.
For more information on Microwave- Pro call us at 1-800-743-3684 or email "info at v-soft.com".

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