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Advanced Software Features
Phase Lock Loop Suppression
DET. CONSTANT:
This is the phase Detector Constant (sensitivity of the phase detector) used
for the measurement. The accuracy of the Phase Detector Constant is
verified if the PLL suppression is verified. The accuracy of the phase
Detector Constant determines the accuracy of the noise measurement.
The phase Detector Constant value, along with the LNA In/Out parameter,
determines the Agilent/HP 3048A System noise floor exclusive of the
reference source. VCO CONSTANT: This is the VCO Tune Constant used
for the measurement. The accuracy of the VCO Tune Constant determines
the accuracy of the PLL noise measurement for offset frequencies in
segments where the entire plotted frequency range is less than the PLL BW /
4. The accuracy of the VCO Tune Constant is verified if the PLL
Suppression is Verified. The VCO Tune Constant times the Tune Range of
VCO determines the Peak Tune Range (PTR) value for the measurement.
The PTR sets the drift tracking and close-in noise suppression capabilities of
the test system.
Agilent Technologies E5500 Phase Noise Measurement System 16-5
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