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A N A L Y S I S
F U N C T I O N S
Drift Function
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Purpose
Use the Drift function to analyze phase or frequency data for frequency drift, or find
frequency offset in phase data. It is common to remove the deterministic frequency drift from
phase or frequency data before analyzing the noise with Allan variance statistics. It is
sometimes useful to remove only the frequency offset from phase data.
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Controls
The basic Drift dialog box contains the following controls:
Control
Type
Description
Drift Type
Combo
Select drift analysis type.
Slope or Noise
Text
Display slope value or noise type.
Remove Drift, Freq
Offset or AR
Checkbox
Remove frequency drift, offset or
autoregression from data.
Calc
Pushbutton
Perform the Drift calculation.
Show Details
Checkbox
Select detailed Drift dialog box format.
Close
Pushbutton
Close the Drift dialog box.
Help
Pushbutton
Invoke this help topic.
Activating Show Details adds the following controls to the Drift dialog box:
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