2-8 Analog Signature Analysis (ASA) Basics
Here's how ASA and power-off testing works:
The Tracker 2800 outputs a precision current-limited AC sine wave signal to a component and displays the resulting current flow, voltage drop and any phase shift on the internal LCD’s display. The current flow causes a vertical trace deflection on the display, while the voltage across the component causes a horizontal trace deflection. This resultant trace on the display is called an analog signature.