AEA Technology 20TDR, Основное руководство

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Figure 3-2
Use the alpha-numeric keypad to enter the trace name. Each key cycles from the number to the
next letter of the alphabet shown above the key. When the desired character is entered use the
►
key to move the cursor to the next digit position and repeat character entry until completed.
When the name is complete (11 characters maximum) press the ENTER key to save the trace
with the name. The date and time will be saved automatically along with the cable’s impedance,
velocity, trace data and all the TDR’s current setups.
Maximum traces that can be saved is 32. Saving trace number 33 or more will overwrite the
traces with the oldest date/time stamps. To delete a highlighted trace press BCKSP key and
follow on-screen directions or use procedures in ETDR PC Vision.
CAUTION: There is no “Undelete.” All deletions in the TDR’s memory are permanent.
Recall Traces
Press the key to access the memory functions shown in Figure 3-1 above. Then use
the ▼ key to move the cursor down to the “RECALL” function and press the ► key to recall the
memory trace list shown in figure 3-3.
Figure 3-3
Use the ▲▼ keys to move the bold highlight to the desired trace. Use the ◄► keys to move the
list a page at a time. Press key to recall the highlighted trace.
The “SAVED (DATE & TIME)” information at the bottom applies to the bold highlighted trace.
Traces are saved in date/time order starting with the oldest at the top of the list.
A recalled trace also recalls all the instrument setups used at the time the trace was saved. This
can be a fast way to reset the instrument to the cable type and setups used in the saved trace.
First, recall the desired trace. When the Measurement Screen returns with the recalled trace