The HP 3708A Noise and Interface Test Set offers an accurate, yet simple, method of simulating microwave radio fade conditions. Designed for operation in the IF section of a digital or FM microwave radio, with addition of calibrated levels of white noise and/or interference signals to the radio IF carrier. A built-in power meter and microprocessor control enables the radio IF carrier power to be sampled at the point of noise injection and the noise density adjusted automatically to maintain a constant carrier level variations. A simple, yet powerful interference test facility is also included, allowing an external broadband signal to be mixed with the radio IF carrier along with/instead of the injected noise. Additional capability provided within the instrument includesTrue RMS IF power meterHigh stability 0 dBm reference toneDirect noise bandwidth measurement

惠普3708测试集的噪声和界面提供了一个简单,方法准确,但模拟微波无线电褪色条件。专为手术数码若节或FM收音机,微波加校准水平的白噪声信号和/或干扰无线电如果载体。一个内置的功率计和微处理器控制使收音机如果载波功率的抽样点的噪声和噪声密度注射自动调整,以便保持车