3M™ Advanced Systems Tester 900AST Series
Use the | and | keys to highlight the desired | |
stored result. Press the | key to display the stored | ||
trace on the bottom of the TDR screen and the “live” trace on the top. You may move the cursor by
using the 
and 
keys.
The control settings for the stored trace can be
viewed by pressing the | or | keys but the |
settings cannot be changed. |
|
|
The TDR Memory function includes a Difference (‘Diff’) control, accessible from the memory screen
by pressing the | key. The default is Difference | ||
Control OFF. Use the | and | arrow key to turn | |
the Difference Control ON. Diff combines the live trace with the stored trace to show the difference in the two readings.
Peak
Use the TDR Peak mode to capture events that may be intermittent. The ‘live’ trace is displayed continuously. As a new maximum or minimum trace is detected, it will replace the previous one on the display.
If the circuit being tested is stable (no intermittent faults), then the minimum, maximum and “live” traces should appear as a single trace.
Note: If any of the control values are changed, the peak histories will be erased and new values will begin to display.
9
