April 2004
4-32 Programming Site Data
Entering Skan/Correlation Parameters
To open the Skan/Correlation window in the Skan/Measure
option, press the [X] arrow key three times (from the All tab) to
reach the Correlate tab, and press [ENTER]. The screen appears
similar to Figure 4-14 below.
Figure 4-14: The Correlate Window in the Skan/
Measure Option
To identify the peak of the receiv ed signa l, the PT878GC uses the
“Threshold” method, in which the peak is identified as the point
where the signal crosses a threshold that is a percentage of the
maximum signal detected.
1. The first prompt, Min Threshold, asks for the minimum
percentage of peak used to measure transit time.
a. Press [ENTER] to enter the text box.
b. Use the numeric keys to enter the recommended value.
c. Press [ENTER] to confirm the entry.
Integrate
Skan/Measure
CancellOK
All
Min Threshold
Percent Peak
%
Count Correlate
-100
Measure Only
100
-40
%
%
Max Threshold