|Crystal Oscillator Testing - White Paper 5991-1734EN c20140717 .pdf||Keysight Technologies
Crystal Oscillator Testing
A policy concerning the testing of the reference oscillators contained within many instruments
such as counters, synthesizers and spectrum analyzers has been defined and adopted in Keysight
Technologies service centers worldwide.
Quartz crystal oscillators are used extensively in measurement instruments to provide an accurate refer-
ence frequency or time base against which measured signals may be compared.
There are two characteristics of such devices which users may wish to know:
1. The absolute oscillator frequency once it has warmed up
2. The stability of the oscillator frequency over time.
Our standard policy is to test the first parameter (and to adjust where necessary) but not the second. This
article is designed to help explain the rationale for this decision.
High-stability ovenized oscillators have their stability specified in terms|