Agilent Technologies HP 8642A/B Dokumentacja Strona 159

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Parameter Entry Descriptions
Entering a Detector Constant
The Detector Constant's value may be changed by keying in the desired
value. The Acceptable Limits for the Detector Constant are shown on the
display. (Keep in mind that absolute measurement accuracy depends on
the accuracy of the Detector Constant.)
Estimating the Detector Constant
An estimate of the Detector Constant can be made directly from the
detector's power level if the detector's sensitivity is known. A power meter
or a spectrum analyzer can be used to measure the power level. The
following graph can be used to determine the Detector Constant for an
HP 33330C Low Barrier Schottkey Diode Detector.
Eduivalent Phase Detector Constant vs. Detector Voltage vs. input Powe^
Diode Detector Voltage {Vdc)
Figure 2-25. Relationship between Detector Constant
and Input Power Level for the HP 33330C
Callbr Process: AM Noise 2-91
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