Cell phone jammer works in a certain frequency range

2 dormitories range (including but not limited to the kennel aisle, corridor, window, etc.), the effective shielding rate should reach 99.9%. 3 production in the region, effectively shielding the rate should reach 99%. 4 small confined space (including but not limited to conversations rooms, storage rooms, toilets, etc.) and more likely to breach the hidden places, effectively shielding the rate should reach 99.9%. 5 unshielded area (including but not limited to the administration building, armed police units or buildings and the surrounding living spaces, etc.), must ensure smooth communication. The   cell  phone jammer saves power energy for it only shields cell phone signals. 6 fully redundant retention devices output, improve service life and adapt to the future development requirements. 4 six national standards 1. GB 8702-88 People's Republic of radiation protection 2. GB 9175-88 waves People's Republic of Environmental Health Criteria 3. GA / T 75-2000 security engineering procedures and requirements 4. JCJ / T 16-92 civil electrical design specifications 5 shielded prison phone system standard "Police Technology" 6. GB / T 50311-2007 for building and integrated wiring systems engineering design specifications 7. GB / T 50312-2007 for building and cabling system engineering acceptance 8. YD / T 5120-2005 wireless indoor coverage system engineering design specifications 9. The   cell  phone jammer    saves power energy for it doesn’t have effect on other electronic equipments. YD 5039-97 Communication Engineering Construction and Environmental Protection Technology provides 10. YD 5098-2005 Communications Authority (station) lightning protection and grounding Ground engineering specifications seven ways a phone message screen, move the 3G standard, TD-SCDMA time slot synchronization must be used to pilot the shielding of the way, is strictly prohibited interference with the uplink time slot of the ways to avoid the strong interference by the base station or even paralysis. 2, for CDMA/CDMA2000, GSM, DCS, PHS and WCDMA standard band cell phone signal strength ≤-65dBm, you can use broadband frequency sweep mode. 3, for CDMA/CDMA2000, GSM, DCS, PHS and WCDMA standard band cell phone signal strength ≥-65dBm points must be used for narrow-band frequency hopping or shielding means.The power of   cell phone jammer is 20w-480w. 4, for the individual small (less than 5) frequency ≥-55dBm signal strength, but must be shielded with a point frequency-hopping mode. 55, outdoor equipment, building on the corresponding monomer or a large area of space-based shield approach, individual leak using small equipment room supplement accordingly. Eight, the system technical requirements 1 signal with the actual distribution of the scene, using the whole field adjustable frequency sweep module in different combinations, the average signal strength and channel more of the band spectrum mask for a large area. (2) the use of built-in adjustable multi-band module interior shielding the host, corresponding to the individual corners to supplement masking band. 3 According to the different environmental requirements within the prison, the scientific selection of the antenna directivity and gain; taking full advantage of the actual construction site structure, topography, etc., set up a reasonable choice position, altitude, direction.cell  phone jammer works in a certain frequency range. 4 control the antenna's main radiating from the premises and personnel activities to ensure that electromagnetic radiation to meet the standards. 5 series strictly limited series antenna system, the total output to the antenna shall not be more than three stages in series, do you have to assign multiple signal distribution can be used in parallel to prevent the link to expand a node failure affect the entire system the surface.