China cell phone jammer is manufactured with adopting the advanced foreign technology

cell phone jammer   is manufactured with adopting the advanced foreign technology
And not, as some media publicity, as long as it is like to harmful electromagnetic waves. Here we explore the above two criteria look after the installation of cell phone jammers electromagnetic environment. Operating frequency of   cell phone jammer are: CDMA870-880MHz, GSM930-960MHz, DCS1805-1850MHz and PHS1900-1920MHz, TDSCDMA2010-2025MHz, WCDMA2130-2145MHz based on "health standards" in the "frequency of 300MHz ~ 300GHz, corresponding wavelength 1m ~ 1mm for the microwave range of electromagnetic waves "is defined, which belong to the microwave frequency band. china cell phone jammer is manufactured with adopting the advanced foreign technology. "Health standards" in the intensity and frequency characteristics of electromagnetic radiation on the human body may cause potential adverse effects of the threshold value under the sector, will allow the environmental electromagnetic radiation standards are divided into two, and developed a standard and secondary standard . Respectively, the wavelength (frequency), intensity, distance, calculated detailed provisions. (Note: a standard for the safe area, refers to the intensity of electromagnetic waves in the environment long-term residence, work and life of all people (including infants, pregnant women and old and sick persons), will not be any harmful impact on the area; special pointed out that the new construction, renovation or expansion of radio, television and radar and other transmitting antenna, in its coverage area residents must meet the "standard level" requirements.    cell phone jammer   is used for phenomena that some illegal students cheat in the college entrance examination. Two standards for the middle zone, refers to the intensity of electromagnetic waves in the environment long-term residents, work and life of all people (including infants, pregnant women and sick and elderly persons) may cause potential adverse effects of the area; in this area can build factories and institutions, but not allowed to build residential, learning more, hospitals and nursing homes, etc. , has been built to take appropriate protective measures. more than two standard areas, harmful effects on the human body can bring; in this area can be used for afforestation or planting crops, but prohibits the construction of residential and crowd all the regular activities of public facilities, such as organs, factories, shops and theaters, etc.; if there are these buildings in this area should take measures, or limit the irradiation time.)    cell phone jammer   is used for phenomena that some illegal students cheat in the adult college entrance examination.Here, we should adopt the "health standards" set forth in the security zone in line with a standard electromagnetic protection standards. By "health standards" in the environment to allow electromagnetic radiation grading standards (see table below) shows a standard microwave safe area to allow the radiation field strength 10μW/cm?, Which means that when the phone is transmitting electromagnetic wave shielding device field strength in the space below 10μW/cm?, the environment is safe. Allow the field-wavelength long, medium and short wave FM microwave hybrid unit level (safe area) V / m V / m μW / cm V / m 2 two (middle area) <25 <12 <40 <10 <5 <10 field strength by major bands.   cell phone jammer   is used for phenomena that some illegal students cheat in the self-taught examination. If the band dispersion field strength, determined according to the weighted composite field to explain other European standards according to CENELEC standards set forth in a safe area to allow for the radiation intensity 900MHZ band 450μW/cm2, 1800MHZ band of 900μW / cm2; IEEE standards set forth in the U.S. primary standard radiation safety zone to allow for the 900MHZ band 600μW/cm2, 1800MHZ band for 1200μW/cm2. China's standards are far stricter standards in foreign countries.