Schubert Markus, Bornkessel Christian, Wuschek Matthias, Schmidt Peter
IMST GmbH, Test Center EMC, Carl-Friedrich-Gauss-St. 2, D-47475 Kamp-Lintfort, Germany.
Radiat Prot Dosimetry. 2007;124(1):53-7. doi: 10.1093/rpd/ncm337. Epub 2007 Jul 6.
The terrestrial digital video and audio broadcast are supposed to replace the existing analogue broadcast systems. To determine possible changes of this switchover on the public exposure situation to radio frequency electromagnetic fields, extensive measurements at more than 300 identical points were performed 'before' and accordingly 'after' the switchover. At the point with the highest sum-exposure, only 0.3% of the ICNIRP reference levels for general public exposure (power flux density) was reached. The statistical analysis of both measurement campaigns ('before-after') shows an increase in mean exposure in the centre of the DVB-T starting areas around Nuremberg and Munich, which is mainly based on the increase in the radiated power at the transmitter stations. After developing a simple calculation program based on the ITU-RP.1546, the measured exposure values were compared to calculations. Optimising the results leads to mean deviations of +/-3 dB at about 80% of all points.
地面数字视频和音频广播预计将取代现有的模拟广播系统。为了确定这种转换对公众暴露于射频电磁场情况可能产生的变化，在转换“之前”和相应的转换“之后”，在300多个相同地点进行了广泛的测量。在总暴露量最高的点，仅达到了国际非电离辐射防护委员会（ICNIRP）公众暴露参考水平（功率通量密度）的0.3%。对两次测量活动（“前后”）的统计分析表明，在纽伦堡和慕尼黑周围的数字视频地面广播（DVB-T）起始区域中心，平均暴露量有所增加，这主要是由于发射站辐射功率的增加。在基于国际电信联盟（ITU）RP.1546开发了一个简单的计算程序后，将测量的暴露值与计算结果进行了比较。对结果进行优化后，在所有点的约80%处，平均偏差为+/-3分贝。
