自第二次世界大战以来，超过300兆周的无线电频谱的使用大大增加，因此有必要重新检查干扰问题。在这些高频下运行的设备和服务之间不仅可能发生干扰，而且干扰可能是由在较低频率下运行的设备引起的，这些设备的谐波辐射超过300兆周。特别是，来自射频工业、科学和医疗设备的电磁辐射可能会对300兆周以上的通信服务造成干扰。为了消除令人反感的干扰，联邦通信委员会在与此类设备的制造商和用户合作后，制定了某些规定，包括允许辐射的限制。符合这些法规要求进行场强测量。目前，300兆周以上的测量标准正在开发中。 目前还没有商用场强计可用于在高于1000兆周的频率下进行测量。在标准方法和设备的开发完成之前，需要一种测量300兆周以上场强的统一做法

The greatly increased use of the radio-frequency spectrum above 300 megacycles since World War II made necessary a re-examination of the interference problem. Not only may interference occur between equipments and services operating at these high frequencies, but also interference may be caused by equipments operating at lower frequencies with appreciable harmonic radiation above 300 megacycles. In particular, electromagnetic radiation from radio-frequency industrial, scientific and medical equipments may cause interference to communication services above 300 megacycles. In order to eliminate objectionable interference, the Federal Communications Commission, after collaboration with manufacturers and users of such equipment, established certain regulations including limits of permissible radiation. Conformance with these regulations requires that field intensity measurements be made. At the present time, measurement standards above 300 megacycles are in the process of development. There are no commercially available field intensity meters with which measurements can be made at frequencies higher than 1000 megacycles. Until the development of standard methods and equipment has been completed, there is a need for a uniform practice for the measurement of field intensities above 300 megacycles