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測試集的噪聲和界面提供了一個簡單,方法準確,但模擬微波無線電褪色條件。專為手術數碼若節或FM收音機,微波加校準水平的白噪聲信號和/或干擾無線電如果載體。一個內置的功率計和微處理器控制使收音機如果載波功率的抽樣點的噪聲和噪聲密度注射自動調整,以便保持車