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Document Part No. E5500-90024Ed. 1.0
Specifying Your VCO Source
When you set up your PLL measurement, you will need to know four
things about the tuning characteristics of the VCO source you are
using. The System will determine the VCO source's peak tuning range
from these four parameters.
G
Tuning Constant, estimated tuning sensitivity (Hz/V)
G
Center Voltage of Tuning Range, (V)
G
Tune Range of VCO, (±V)
G
Input Resistance of Tuning Port, (ohms) if the tuning constant is
not to be measured.
The measurement examples in the next chapter that recommend a
specific VCO source will provide you with the tuning parameters for
the specified source.
E5500 Phase Noise Measurement System Version A.02.00
Absolute Measurement Fundamentals
The Phase Lock Loop Technique
6
6-5
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