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Sources of Radiofrequency/Microwave Radaition


Source

Frequency (MHz)

Potential for
Over-exposure?

Video Display Terminal (VDT)

0.015 - 0.3

No

Dielectric Heater

1 - 100
(typically 27.12)

Yes

Diathermy Applicator

13.56, 27.12, 915, 2450

Yes

Communications Transmitters: AM Radio

0.535 - 1.605

Yes

Communications Transmitters: FM Radio

88 - 108

Yes

Communications Transmitters: VHF TV

54-72, 76-88, 174-216

Yes

Communications Transmitters: UHF Radio

470 - 890

Yes

Communications Transmitters: Dish Antenna

800 - 15,000

Yes

CB Radio

27.12

Yes

Cordless Telephone

46- 49

No

Cellular Telephone

824 - 850

No

Traffic Radar

10,500 and 24,000

No

Microwave Oven

915 and 2,450

No*

*Federal legislation requires that microwave ovens be constructed to meet stringent microwave leakage limits and to have safety interlocks. When these interlocks are defeated, for example, during repair work, there is a risk of overexposure to microwave radiation.