直到最近，电缆系统信号泄漏监测和维修活动还必须集中于防止对108兆赫（MHz）至137兆赫和225兆赫至400兆赫甚高频（VHF）和超高频（UHF）频段的航空导航和通信系统的干扰。尽管联邦通信委员会（FCC）规则第76.605（a）（12）节包含400 MHz以上频率的泄漏限制，但UHF频谱中的电缆信号通常未被观察到，因为（1）FCC没有明确要求监测这些频率上的泄漏，以及（2）几乎没有关于干扰的投诉。

Until recently, cable system signal leakage monitoring and repair activities were necessarily focused on preventing interference to aeronautical navigation and communication systems in the 108 megahertz (MHz) to 137 MHz and 225 MHz to 400 MHz very high frequency (VHF) and ultra-high frequency (UHF) bands. Although Section 76.605(a)(12) of the Federal Communications Commission (FCC) Rules contains leakage limits for frequencies above 400 MHz, cable signals in the UHF spectrum were generally unobserved because (1) there were no explicit FCC requirements to monitor leakage on those frequencies, and (2) there were few if any complaints of interference.