3M
™
Advanced Systems Tester 900AST Series
38
Note: Editing the velocity factor may cause the
TDR to read inaccurately. The 900 AST tester
maintains modified Vp settings in internal memory.
Press the key in the TDR Setup screen to
restore original default Vp settings for all wire
types.
TDR Menu
There are six possible modes in which to use the
TDR.
- Use Single Trace to view a single conductor or
circuit.
- Use Dual Trace to view two separate conductors or
circuits at the same time.
- Use Differential to view the difference between
two conductors or circuits.
- Use Crosstalk to view the electrical coupling
between two conductors or circuits.
- Use Memory to compare a “live” trace with a trace
stored in memory.
- Use Peak to display a history of maximum and
minimum values with the live trace.
Press the or keys to move to the desired
mode. Press the
key to accept the choice and
start the measurement.
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