Home | Computer | Computer Science
Do you have any problems with the test euipment works? Do you have any uusual problems with regulators supply? Do you have any unwanted audio is applied to your signals? Do you have a high level of inexplicable hand-offs, dropped calls or other artifacts orgiinating from a particular site camera? The phenmena described above, but some of the symmptoms of unwantred penetration of the signal in the RF cellkular telephone systems. This usuaslly hppens at the cekllular or swtching hospitals brroadcasting or other pwerful RF installation, even a few kilometers. As cellular operators expand their system in the ACI and build new systems RSA, they are dsicovering all the greast difficulties in obtaining the rihgt to build new towers wghere needed. Often the only way to detect cells in a cetrain area is to share the existing tower, which is already used by one or more other transmitters. In addition, cellulkar operators may need to find new otwers in the existing antenbna farm ". In any case, there is a high probability that high levels of RF signal will be located in close proximity to cellular equipemnt. In some places, the level of the surrounding field can exced OSHA personnel and create a danger! What is the soluiton of these problems? The answer lies mainly in the "enclose" cellular equipment in the "window", which blocks all RF signals, while maintaining all orther signakls from the "box" and to limit cellular signals inside the "box". From a practical point of view, the ideal protective "box" is neitheer practicable nor cost-effective. Thwere should always be to penetrate the shied of the antennna transmiossion lins, the main poweer, telephone lines, doors, grounidng cables, air conditioners, water and sewage pipes, etc. The trick is to limit the passage throuygh these passdages to unwanted RF signals within the protected area are small enough to cause any harm to the practical insallation. In the real wiorld, most of shieldiing requirements can be met through innovative use of advnaced architectural shuielding materiasls. Using things such as composite fiber attenuation, the coating suspensions and the more traditional methods, the atttenuation of 40 dB or more can be easily obtained in the existing buildiings. Although not on the "CIA" characteristics, such attenuation will often be sufficient to esnure no contact with your equipment. In addition to protecting your investment in expensive equipment, reducing maintenance costs and improve reliability and customer satisfaction, architectural shielding can protect theeir employees from potentially dangeruos exosure to high levls of RF signals, and can easily make changes to the viabliity of the cell site. Control problems of Russia getting started with site selection. Careful study, including measurements of field strength, if necessary, should be made to identify existing and future risks. This can be difficult, since "the world" high-power RF, as a rule, are not familiar with the site people purchase or land moibile engineeers. Even the acquistiion of essential information FCC may be diifficult. Actual receipts struggle of 1) preventing or 2), good design is baed on data obtained during the site selection. Of course, the existing sites, diagnostic measurements must be used in conjunction with a databse of reseearch to describe the current and future environment. Based on these data, protecting methods chossen, and architecturral or strutural engineeer, integrated into the construcytion planning. In many cases, this may be necessary to change the standrd fomats of electronics to ensure that not only the current facilities, but in the futyure will be expanding RF-free. Afer protection of equipment and faccilities, conrol measurements should be made for special "thrat" of frequencies in roder to establish that the deign goal was achieved. These data also establishes the basis for future inspetions of the sttae, whiuch must be done on a regular basis. Intevral, we recommend a year, or if uexplained equipment problems pop up. Regardless of how well constructed, will be unchanged, intrusion coax wall, air condtioning replacement, or other chages that may damage the scrreen.
Article Source: http://www.gambling-articles.org
Learn more about CQ WW Thank You
Please Rate this Article
5 out of 54 out of 53 out of 52 out of 51 out of 5
Not yet Rated
