Ham General

What is one way that RF energy can affect human body tissue?

It heats body tissue

Which of the following is used to determine RF exposure from a transmitted signal?

All these choices are correct: Its duty cycle; Its frequency; Its power density

How can you determine that your station complies with FCC RF exposure regulations?

All these choices are correct: By calculation based on FCC OET Bulletin 65; By calculation based on computer modeling; By measurement of field strength using calibrated equipment

What does “time averaging” mean when evaluating RF radiation exposure?

The total RF exposure averaged over a certain period

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Take action to prevent human exposure to the excessive RF fields

What must you do if your station fails to meet the FCC RF exposure exemption criteria?

Perform an RF exposure evaluation in accordance with FCC OET Bulletin 65

What is the effect of modulation duty cycle on RF exposure?

A lower duty cycle permits greater power levels to be transmitted

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas

What type of instrument can be used to accurately measure an RF field strength?

A calibrated field strength meter with a calibrated antenna

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Take precautions to ensure that the antenna cannot be pointed in their direction when they are present

What precaution should be taken if you install an indoor transmitting antenna?

Make sure that MPE limits are not exceeded in occupied areas

What stations are subject to the FCC rules on RF exposure?

All stations with a time-averaged transmission of more than one milliwatt