Agilent Technologies e1420b User Manual page 7

Selecting a Reference
Estimating the Tuning Constant
Tracking Frequency Drift
Changing the PTR
Minimizing Injection Locking
Inserting a Device
Evaluating Noise Above the Small Angle Line
6 Absolute Measurement Examples
Stable RF Oscillator
Agilent E5505A User's Guide
The Noise Level of the Reference Source
Figure 75. Reference source noise approaches DUT noise
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Figure 76. DUT noise approaches reference noise
Using a Similar Device
Using a Signal Generator
Tuning Requirements
Table 12. Tuning Characteristics of Various VCO Source Options
Figure 77. Voltage tuning range limits relative to center voltage of the VCO tuning
curve 114
Table 13. VCO tuning constant calibration method
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Evaluating beatnote drift
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Figure 78. Peak tuning range
The Tuning Qualifications
Adding Isolation 120
Increasing the PLL Bandwidth
Figure 79. Peak tuning range (PTR) Required by injection locking.
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An attenuator 122
Figure 80. Measurement noise floor relative to R-Port signal level
An amplifier 123
Figure 81. Measurement noise floor as a result of an added attenuator
Determining the Phase-Lock-Loop bandwidth
Figure 82. Phase lock loop bandwidth provided by the peak tuning range
Figure 83. Graph of small angle line and spur limit
Figure 84. Requirements for noise exceeding small angle limit
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Required equipment 130
Defining the measurement
Figure 85. Select the parameters definition file
Figure 86. Enter source information
Table 14. Tuning characteristics for various sources
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