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TowerCalc®
TowerCalc®
Richard Tell Associates, Inc. announces the release of Towercalc® version 3.5, a software analysis tool for evaluating radio frequency (RF) field levels on antenna towers produced by antennas of the type commonly used in the cellular, paging, SMR, PCS and conventional two-way radio communications services. The program is structured as a spreadsheet and is compatible with Microsoft® EXCEL® on the PC and on the Macintosh. TowerCalc® produces color graphic representations of the composite RF fields along the vertical axis of towers produced by the simultaneous operation of many antennas located at different mounting distances from the tower and heights above the ground, providing a way of visually viewing the complexities of the resulting near-field RF environment using an FCC recognized near-field model. A data table within Towercalc® maintains detailed information about each antenna on the tower that is needed for calculating the RF fields. TowerCalc® version 3 now supports directional antennas as well!
TowerCalc® provides a graphic depiction of the tower on the left side of the screen that presents a colorized representation of the composite RF field levels along the tower showing where higher field levels exist. Toward the right side of the screen, individual vertical bars present colorized maps of the RF fields produced by each individual antenna on the tower.
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Several unique features of Towercalc® facilitate its effectiveness in evaluating a complex antenna site for compliance with applicable rules and regulations for controlling human exposure to RF fields:
Composite RF fields are represented as a percentage of the selected exposure limit, automatically accounting for frequency in the computed results.
Each tower pixel is colored according to user selectable thresholds corresponding to selected percentages of the exposure limit and user selectable colors.
The Towercalc® analysis may be prepared for any one of 14 different, user selectable RF exposure limits including the FCC adopted rules in 1996, the ANSI/IEEE 1992 standard and recommended limits set by the
International Commission on Non-ionizing Radiation Protection
, the
United Kingdom National Radiological Protection Board
, Australia and Canada as well as the CENELEC European Prestandard.
Analysis results may be obtained for any height tower. These results may be displayed for any vertical section of the tower ranging from as little as 50 feet to as much as 800 feet of vertical height along the tower. Towers up to 2000 feet in height can be evaluated.
Selected antennas may be turned on or off at the choice of the user by a single double click on the antenna map screen.
A special Band Analysis mode permits analysis and identification of RF fields according to frequency band.
A statistical summary table is available for summarizing the results of each tower analysis, showing the percentage of the tower height having projected RF fields within various ranges of percentages of the selected exposure limit.
RF near-field levels are computed from either all or selected antennas by applying a model that takes into account the antenna’s stand-off distance, aperture height and mounting height above the ground. Resulting, spatially averaged power densities are expressed as a percentage of a user selectable exposure limit depending on frequency. Towers are composed of one-foot tall pixels and RF fields are computed for each of these pixels for each selected antenna.
A convenient pop-up MPE Power Density calculator is available for analyzing the RF fields of a specific antenna on the tower. This feature allows for reading the technical data such as coordinates, frequency, power and aperture height directly from the underlying data table for a specific tower or simply manually inputting this information about any antenna of interest from the keyboard. A handy reverse calculation feature permits examining, for example, what antenna power input would be associated with a given percentage of the MPE at a particular height on the tower or finding how high a certain antenna would have to be mounted at to reduce the fields to a given value at a specific location; a special coaxial loss calculator function provides for convenient evaluation of transmitter input power to an antenna by applying user selectable coaxial cable types along with line length and transmitter output power.
An export/import file feature allows for the saving and using of data files that describe the tower height, antenna details and detailed transmitter data for subsequent reanalysis or modification.
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Version 3.5 of TowerCalc® supports directional antennas mounted on towers! When antenna data are being entered on the antenna data table, a pop-up dialog box assists in setting the appropriate parameters for analyzing RF fields incident where a climber would be located. Either omnidirectional antennas or directional antennas may be specified.
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A convenient TowerCalc feature is the display of the composite RF field values plotted as a function of height on the tower. This graphical display provides immediate insight for the entire height of the tower relative to hot spots.
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Price: $2,995.00
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