Distinguishing Between APR and Pullability When Specifying a VCXO
- Author:
Jorge Gomez & Roman Boroditsky
This paper will describe the differences between Absolute Pull Range (APR) and Pullability in a VCXO. Oftentimes these two terms are used interchangeably, when in reality they are two separate specifications.
VCXO Pullability, or pull, is the ability to change the output frequency when you change the VCXO control voltage from its center value. Pullability is measured as the frequency difference between the VCXO set at center control voltage and the VCXO set at the extremes of the control voltage. Occasionally people specify Pullability from nominal frequency as opposed to from center voltage.
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