4-4
3
2
1
0
-1
-2
-3
t0
t1
t2
t3
t4
Temperature
Step
Vibration
Shock
Oscillator
Turn Off
&
Turn On
2-g
Tipover
Radiation
Time
t5
t6
t7
t8
Text Box: Aging
Aging
Off
On
Short-Term
Instability
Idealized Frequency-Time-Influence Behavior
   Shown above are the major types of oscillator frequency instabilities.  The pages that follow show each of the changes, and some others, in more detail.