Non-Interfering On-Line Receiver Test System.
DEPARTMENT OF THE NAVY WASHINGTON DC
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An on-line noise figure measurement system for receivers that produces valid results whether or not signals are being received. A narrow pulse having a low pulse repetition frequency and low amplitude is injected into the receiver. A processing circuit cyclically measures the output of the RF stage of the receiver to produce a ratio of two signal values. One value is measured in the absence of any signal entering the receiver while the other value is measured with only the pulse signal impressed on the receiver. Author
- Test Facilities, Equipment and Methods