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Maximum Jammer Distance

Enemy Specifications Power Output of the Enemy Transmitter (ERP)   Watts dBm Elevation of the Enemy Transmitter Location (AMSL)   meters feet Enemy Transmitter Location-to-Target Receiver Location Distance   kilometers miles   Friendly Specifications Power Output of the Jammer Transmitter (ERP)   Watts dBm Elevation of the Jammer Transmitter Location (AMSL)   meters feet Terrain and Ground Conductivity Factor     Level terrain (over water, sea, lakes, and ponds) - good conductivity Rolling hills (farmland type terrain) - good conductivity Moderately rough terrain (rolling to high hills, forested farmland) - fair/good conductivity Very rough terrain (rocky mountains or desert) - poor conductivity       Accurate for frequency modulated (FM) VHF receivers only. Jammer location must have a reasonable line-of-sight propagation path to the target receiver's location with no high hills between the two locations. ERP Effective Radiated Power. Actual power output after taking into account feedline losses and antenna gains. AMSL Above Mean Sea Level. Height referenced above sea level, or zero elevation.

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