Interference Testing with Handheld Spectrum Analyzers Manual

Interference Testing with Handheld Spectrum Analyzers Manual
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Summary of Contents

Interference Testing with Handheld Spectrum Analyzers Manual

  • 9Sources of InterferenceInterference becomes a problem when a wireless system no longer operates as expected. Even though regulatory agencies and standards organizations define wireless operation and protocols within each frequency band, interference from intentional and unintentional radiators may have detrimental effects on system performance.Interference from unintentional radiators include:• electrical equipment• switching power supplies• clocks• control signals• ignition motors• other mechanical machinery• microwave ovens• other home appliances• photocopiers• printers• fluorescent and plasma lighting• power linesUnintentional radiators can produce either broadband noise or potentially modu-late the radio signals propagating in the surrounding environment. Environment conditions such as lightning and precipitation static can degrade system perfor-mance and potentially damage electronic components.Interference from intentional radiators include radio transmissions from other wireless systems such as:• broadcast radio and television• cellular• satellite• radar• mobile radio• cordless phonesIt should be noted that the majority of radio interference is generated from other wireless systems operating with faulty transmitters and repeaters or from systems that are maliciously attempting to disrupt communications possibly in a military combat situation.