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(cè)試集的噪聲和界面提供了一個(gè)簡(jiǎn)單,方法準(zhǔn)確,但模擬微波無(wú)線電褪色條件。專為手術(shù)數(shù)碼若節(jié)或FM收音機(jī),微波加校準(zhǔn)水平的白噪聲信號(hào)和/或干擾無(wú)線電如果載體。一個(gè)內(nèi)置的功率計(jì)和微處理器控制使收音機(jī)如果載波功率的抽樣點(diǎn)的噪聲和噪聲密度注射自動(dòng)調(diào)整,以便保持車