Telenetics OM-AMPS-100 manual External Antenna Selection Criteria, Antenna Placement

Page 48

Section 5

External Antenna Guidelines

NOTE: Doubling the E.R.P. does not double the range of an antenna.

External Antenna Selection Criteria

The following sections identify the factors to consider when selecting the type and location of external antenna to use with your OMEGA unit.

Antenna Placement

The method and quality of the antenna installation impact the clarity and reliability of cellular signal reception and transmission. Always strive for optimal antenna placement.

Distance from the Antenna to the Closest Cell Site

Find out the locations of all nearby cell sites. This information will help you position the antenna for maximum performance. Contact the local cellular carrier to obtain this information.

Degrees of Down-tilt on the Cell Site Antenna Array

Contact the local cellular carrier to find out this figure. The greater the down-tilt, the closer your antenna should be to the cell site or the higher gain antenna you need.

Obstacles between the Antenna and Cell Site

Natural obstacles such as mountains, hills, and trees between the antenna and cell site can cause signal deterioration. In some instances, the signal can be blocked completely. To compensate for natural obstacles, move the antenna location, raise the antenna height, or use a higher gain antenna.

Man-made obstacles can also affect cellular performance. Check the path between the antenna and the cell site for tall buildings, water towers, and other construction. To compensate for man- made obstacles, move the antenna location, raise the antenna height, or use a higher gain antenna are ways.

48	OMEGA Installation, Operation, and Maintenance Manual

Image 48

Contents OMEGA Page Table of Contents Using the Configuration Program Specifying a Default Port Anti-streaming Command Summary Table of Contents Preface Product OverviewFigure P-1. Omega Application Ancillary Documentation Preface Installation Contents Hardware Features IntroductionSelecting a location for installing Omega Finding a Suitable LocationInstalling Omega Avoiding HazardsUnpacking Required Materials and Tools Mounting OmegaMounting Omega Mounting an AntennaConnecting the Input Voltage Source Connecting an Input Voltage Source Connecting the Endpoint Device Powering Up Omega LEDCall Origination Testing Operating OmegaVerifying the Cellular Transceiver Unit Activating Your Cellular TransceiverCall Answer Testing Contents Troubleshooting Contents Troubleshooting Checking the Main Power SupplyChecking the Battery Voltage Checking the AntennaReinitializing Omega Specifications Specifications Operation Modem InterfaceBattery Operation Cellular Transceiver InterfaceSwitches and LED Indicators Power SupplyMechanical Specifications ConnectorsEnvironmental Specifications Agency Compliance EMI/RFISection Specifications Section Using Configuration Program Section Using the Configuration Program Prerequisites Getting Started Reading the Cellular Telephone Signal COM Port PromptExample of Signal Bar Programming a Telephone NumberChanging the Login Password Entering the Cellular Telephone’s SIDExiting the Configuration Program Section External Antenna Guidelines Section External Antenna Guidelines RF Signal General GuidelinesHigh Voltage Areas GainAntenna Placement External Antenna Selection CriteriaDistance from the Antenna to the Closest Cell Site Degrees of Down-tilt on the Cell Site Antenna ArrayCable for Connecting the Antenna to Omega Electrical InterferenceDistance from the Antenna to Omega Height Above Ground Level of the AntennaTypes of External Antennas Directional AntennaElevated Feed 3dB Gain Antenna Determining the Best External Antenna Location Contact InformationSection External Antenna Guidelines Appendix a Port Expansion Module Option Appendix a Port Expansion Module Option Package Contents Field InstallationFirgure A-1. Sliding the Module into the Card Guides Figure A-2. Connecting the RJ-11 Jacks Testing the Module Ports Connecting Endpoint DevicesTime Delay Method Automatic Connection Example Atdt 19495552468,,,4 Enter Second Dial Tone Method Manual ConnectionSpecifying a Default Port Anti-streaming Command Summary To… Do the Following…Appendix B Warranty Compliances Appendix B Warranty & Compliances BWarranty and RMA Statement Limitations FCC Statement FCC Interference StatementFCC Part 15 Statement Comments About This Manual Index Index