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3M
™
Advanced Systems Tester 900AST Series
8
Dual Trace
Dual Trace is used to compare two coaxial circuits at
the same time (usually a faulted and a good circuit).
Connect the TDR test leads to the (Red and Black
jacks) and connect the second TDR test lead set
(Blue and Yellow jacks) to the reference circuit.
This mode is valuable when testing a system with
multiple coaxial wires serving the same system.
Memory
Memory mode is used to compare a circuit under
test to a stored trace in memory. The first screen in
memory mode will show a list of the ID numbers for
all stored TDR traces. Use the
and keys to
highlight the desired stored result.
Press the key to select the highlighted result and
display the stored results list for that ID number by
type (TDR), date and time.
You can delete individual stored results by pressing
the key.